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Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

US Synthetic Corp (TRL 4 Component)- The Development of Open, Water Lubricated Polycrystalline Diamond Thrust Bearings for use in Marine Hydrokinetic (MHK) Energy Machines  

Broader source: Energy.gov [DOE]

US Synthetic Corp (TRL 4 Component) - The Development of Open, Water Lubricated Polycrystalline Diamond Thrust Bearings for use in Marine Hydrokinetic (MHK) Energy Machines

2

Ultratough, Thermally Stable Polycrystalline Diamond/Silicon...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Ultratough, Thermally Stable Polycrystalline DiamondSilicon Carbide Nanocomposites for Drill Bits Ultratough, Thermally Stable Polycrystalline DiamondSilicon Carbide...

3

Software optimization for electrical conductivity imaging in polycrystalline diamond cutters  

SciTech Connect (OSTI)

We previously reported on an electrical conductivity imaging instrument developed for measurements on polycrystalline diamond cutters. These cylindrical cutters for oil and gas drilling feature a thick polycrystalline diamond layer on a tungsten carbide substrate. The instrument uses electrical impedance tomography to profile the conductivity in the diamond table. Conductivity images must be acquired quickly, on the order of 5 sec per cutter, to be useful in the manufacturing process. This paper reports on successful efforts to optimize the conductivity reconstruction routine, porting major portions of it to NVIDIA GPUs, including a custom CUDA kernel for Jacobian computation.

Bogdanov, G.; Ludwig, R. [Department of Electrical and Computer Engineering, Worcester Polytechnic Institute, 100 Institute Rd, Worcester, MA 01609 (United States); Wiggins, J.; Bertagnolli, K. [US Synthetic, 1260 South 1600 West, Orem, UT 84058 (United States)

2014-02-18T23:59:59.000Z

4

Ultratough, Thermally Stable Polycrystalline Diamond/Silicon...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

carbide (SiC) binders. These composites are stable up to 1,200C, but have reduced fracture toughness (6-8 MPam 12 ) due to the brittleness of the SiC and diamond. This...

5

High-power TSP bits. [Thermally Stable Polycrystalline diamond  

SciTech Connect (OSTI)

This paper reviews a three-year R D project to develop advanced thermally stable polycrystalline diamond (TSP) bits that can operate at power levels 5 to 10 times greater than those typically delivered by rotary rigs. These bits are designed to operate on advanced drilling motors that drill 3 to 6 times faster than rotary rigs. TSP bit design parameters that were varied during these tests include cutter size, shape, density, and orientation. Drilling tests conducted in limestone, sandstone, marble, and granite blocks showed that these optimized bits drilled many of these rocks at 500 to 1,000 ft/hr (150 to 300 m/h), compared to 50 to 100 ft/hr (15 to 30 m/h) for roller bits. These tests demonstrated that TSP bits are capable of operating at the high speeds and high torques delivered by advanced drilling motors now being developed. These advanced bits and motors are designed for use in slim-hole and horizontal drilling applications.

Cohen, J.H.; Maurer, W.C. (Maurer Engineering Inc., Houston, TX (United States)); Westcott, P.A. (Gas Research Inst., Chicago, IL (United States))

1994-03-01T23:59:59.000Z

6

Wear mechanisms for polycrystalline-diamond compacts as utilized for drilling in geothermal environments. Final report  

SciTech Connect (OSTI)

The work, which was performed in the period from 12/6/79 to 9/30/81 included: (1) rock cutting experiments with single point polycrystalline sintered diamond compact (PDC) cutters to quantitatively determine cutter wear rates and identify wear modes, (2) PDC rock cutting experiments to measure temperatures developed and examine the effects of tool wear, cutting parameters and coolant flow rates on temperature generation, (3) assisting in performing full scale laboratory drilling experiments with PDC bits, using preheated air to simulate geothermal drilling conditions, and in analyzing and reporting the experimental results, and (4) acting in a consulting role with the purpose of establishing design specifications for geothermal hard matrix PDC bits to be procured by Sandia Laboratories for test purposes.

Hibbs, L.E. Jr.; Sogoian, G.C.

1983-05-01T23:59:59.000Z

7

Materials - Coatings & Lubricants  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Coatings and Lubricants: Coatings and Lubricants: Super-Hard and Ultra-Low-Friction Films for Friction and Wear Control Ali Erdemir researches nanolubricants. Ali Erdemir researches nanolubricants. The many rolling, rotating and sliding mechanical assemblies in advanced transportation vehicles present friction and wear challenges for automotive engineers. These systems operate under severe conditions-high loads, speeds and temperatures-that currently available materials and lubricants do not tolerate well. Improving the surface friction and wear characteristics of the mechanical system components is an opportunity for engineers, and the use of super-hard, slippery surface films offers promise. Argonne scientists have developed a number of smooth, wear-resistant, low-friction nanocomposite nitride and diamond-like carbon films that have

8

Large Diesel Engine Lubrication  

Science Journals Connector (OSTI)

Centralized lubrication for slow-speed internal combustion engines ; Marine diesel engine lubrication ...

Hans Gaca; Jan Ruiter; Götz Mehr; Theo Mang

2014-01-01T23:59:59.000Z

9

Tethered Lubricants  

SciTech Connect (OSTI)

We have performed extensive experimental and theoretical studies of interfacial friction, relaxation dynamics, and thermodynamics of polymer chains tethered to points, planes, and particles. A key result from our tribology studies using lateral force microscopy (LFM) measurements of polydisperse brushes of linear and branched chains densely grafted to planar substrates is that there are exceedingly low friction coefficients for these systems. Specific project achievements include: (1) Synthesis of three-tiered lubricant films containing controlled amounts of free and pendent PDMS chains, and investigated the effect of their molecular weight and volume fraction on interfacial friction. (2.) Detailed studies of a family of hairy particles termed nanoscale organic hybrid materials (NOHMs) and demonstration of their use as lubricants.

Archer, Lynden

2010-09-15T23:59:59.000Z

10

Vehicle Technologies Office: Lubricants  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Lubricants to someone by Lubricants to someone by E-mail Share Vehicle Technologies Office: Lubricants on Facebook Tweet about Vehicle Technologies Office: Lubricants on Twitter Bookmark Vehicle Technologies Office: Lubricants on Google Bookmark Vehicle Technologies Office: Lubricants on Delicious Rank Vehicle Technologies Office: Lubricants on Digg Find More places to share Vehicle Technologies Office: Lubricants on AddThis.com... Just the Basics Hybrid & Vehicle Systems Energy Storage Advanced Power Electronics & Electrical Machines Advanced Combustion Engines Fuels & Lubricants Fuel Effects on Combustion Lubricants Natural Gas Research Biofuels End-Use Research Materials Technologies Lubricants As most vehicles are on the road for more than 15 years before they are retired, investigating technologies that will improve today's vehicles is

11

diamond pipeline  

Science Journals Connector (OSTI)

the various steps through, which a diamond passes from production to marketing not including the end consumer. Also called diamond chain , pipeline ...

2009-01-01T23:59:59.000Z

12

Method to fabricate micro and nano diamond devices  

DOE Patents [OSTI]

A method including forming a diamond material on the surface of a substrate; forming a first contact and a separate second contact; and patterning the diamond material to form a nanowire between the first contact and the second contact. An apparatus including a first contact and a separate second contact on a substrate; and a nanowire including a single crystalline or polycrystalline diamond material on the substrate and connected to each of the first contact and the second contact.

Morales, Alfredo M; Anderson, Richard J; Yang, Nancy Y. C.; Skinner, Jack L; Rye, Michael J

2014-10-07T23:59:59.000Z

13

Ionic Liquids as Novel Engine Lubricants or Lubricant Additives...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Additives Ionic Liquids as Novel Engine Lubricants or Lubricant Additives Bench test results showed that compared with fully-formulated engine oils, selected low-viscosity...

14

DIESEL FUEL LUBRICATION  

SciTech Connect (OSTI)

The diesel fuel injector and pump systems contain many sliding interfaces that rely for lubrication upon the fuels. The combination of the poor fuel lubricity and extremely tight geometric clearance between the plunger and bore makes the diesel fuel injector vulnerable to scuffing damage that severely limits the engine life. In order to meet the upcoming stricter diesel emission regulations and higher engine efficiency requirements, further fuel refinements that will result in even lower fuel lubricity due to the removal of essential lubricating compounds, more stringent operation conditions, and tighter geometric clearances are needed. These are expected to increase the scuffing and wear vulnerability of the diesel fuel injection and pump systems. In this chapter, two approaches are discussed to address this issue: (1) increasing fuel lubricity by introducing effective lubricity additives or alternative fuels, such as biodiesel, and (2) improving the fuel injector scuffing-resistance by using advanced materials and/or surface engineering processes. The developing status of the fuel modification approach is reviewed to cover topics including fuel lubricity origins, lubricity improvers, alternative fuels, and standard fuel lubricity tests. The discussion of the materials approach is focused on the methodology development for detection of the onset of scuffing and evaluation of the material scuffing characteristics.

Qu, Jun [ORNL

2012-01-01T23:59:59.000Z

15

Fuel and Lubricant Effects  

Broader source: Energy.gov (indexed) [DOE]

Fuel and Lubricant Effects Fuels Research, DOE agreements 13415, 13425 Bruce G. Bunting, Mike Bunce, Kukwon Cho, Jun Qu, Robert Crawford, Jim Szybist, Scott Sluder, John Storey,...

16

4 - Hydrodynamic Lubrication  

Science Journals Connector (OSTI)

Publisher Summary In this chapter the basic principles of hydrodynamic lubrication are discussed. The mechanisms of hydrodynamic film generation and the effects of operating variables such as velocity, temperature, load, design parameters, etc., on the performance of such films are outlined. These are explained using bearings commonly found in many engineering applications as examples. Secondary effects in hydrodynamic lubrication such as viscous heating, compressible and non-Newtonian lubricants, bearing-vibration and deformation are described and their influence on bearing-performance assessed. The complete separation of sliding surfaces by a liquid film under full hydrodynamic lubrication can allow bearings to operate indefinitely without any wear. Any liquid or gas can be used for this form of lubrication, provided that no chemical attack on the bearing occurs. The disadvantage of hydrodynamic lubrication is that a non-zero sliding or “squeeze” velocity is required before load capacity is obtained. Some damage to bearings during starting or stopping is inevitable because of this condition. Vibration induced by hydrodynamic instability may occur during operation at high speeds and this should always be carefully controlled. Despite these deficiencies, hydrodynamic lubrication is the preferred form of lubrication in most bearing systems.

Gwidon W. Stachowiak; Andrew W. Batchelor

2006-01-01T23:59:59.000Z

17

Diamond/aluminium nitride composites for efficient thermal management applications  

SciTech Connect (OSTI)

Synthetic diamond/AlN composite materials have been fabricated by a combination of microwave plasma-assisted chemical vapor deposition and molecular beam epitaxy. These wide band gap semiconductor heterojunctions show promises for many applications, including thermal management, deep ultraviolet light emitting devices, and high power and high temperature electronics. Here, we report results of an interface study of polycrystalline diamond layers grown on single crystal AlN(0001). High resolution transmission microscopy revealed atomically sharp interfaces between diamond and AlN. Temperature dependent Raman spectroscopy measurements showed reduced thermal resistance on diamond-coated AlN substrates compared to uncoated AlN at temperatures above 330 K.

Cervenka, J.; Dontschuk, N.; Prawer, S. [School of Physics, University of Melbourne, VIC (Australia); Ladouceur, F. [School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW (Australia); Duvall, S. G. [Silanna Semiconductor Pty Ltd., Sydney, NSW (Australia)

2012-07-30T23:59:59.000Z

18

Vehicle Technologies Office: Lubricants  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Lubricants Lubricants As most vehicles are on the road for more than 15 years before they are retired, investigating technologies that will improve today's vehicles is essential. Because 11.5 percent of fuel energy is consumed by engine friction, decreasing this friction through lubricants can lead to substantial improvements in the fuel economy of current vehicles, without needing to wait for the fleet to turn over. In fact, a 1 percent fuel savings in the existing vehicle fleet possible through lubricants could save 97 thousand barrels of oil a day or $3.5 billion a year. Because of these benefits, the Vehicle Technologies Office supports research on lubricants that can improve the efficiency of internal combustion engine vehicles, complementing our work on advanced combustion engine technology.

19

4 Hydrodynamic Lubrication  

Science Journals Connector (OSTI)

Publisher Summary This chapter discusses the theory of hydrodynamic lubrication. The chapter demonstrates how a basic property of all liquids, such as viscosity, can be used to produce cheap, reliable bearings that operate with low friction and wear. The mechanisms of hydrodynamic film generation and the effects of operating variables such as velocity, temperature, load, design parameters, etc., on the performance of such films are outlined. This is explained using bearings commonly found in many engineering applications as examples. Secondary effects in hydrodynamic lubrication such as viscous heating, compressible and non-Newtonian lubricants, bearing vibration and deformation is described and their influence on bearing performance is assessed. Like many important scientific principles, chance observation played an important role in the recognition of hydrodynamic action as a basic mechanism of bearing lubrication. The complete separation of sliding surfaces by a liquid film under full hydrodynamic lubrication can allow bearings to operate indefinitely without any wear. Any liquid or gas can be used for this form of lubrication provided that no chemical attack of the bearing occurs. The disadvantage of hydrodynamic lubrication is that a non-zero sliding or “squeeze” velocity is required before load capacity is obtained.

1993-01-01T23:59:59.000Z

20

Diamond Nanophotonics  

E-Print Network [OSTI]

The burgeoning field of nanophotonics has grown to be a major research area, primarily because of the ability to control and manipulate single quantum systems (emitters) and single photons on demand. For many years studying nanophotonic phenomena was limited to traditional semiconductors (including silicon and GaAs) and experiments were carried out predominantly at cryogenic temperatures. In the last decade, however, diamond has emerged as a new contender to study photonic phenomena at the nanoscale. Offering plethora of quantum emitters that are optically active at room temperature and ambient conditions, diamond has been exploited to demonstrate super-resolution microscopy and realize entanglement, Purcell enhancement and other quantum and classical nanophotonic effects. Elucidating the importance of diamond as a material, this review will highlight the recent achievements in the field of diamond nanophotonics, and convey a roadmap for future experiments and technological advancements.

Igor Aharonovich; Elke Neu

2014-08-23T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Diamond Nanophotonics  

E-Print Network [OSTI]

The burgeoning field of nanophotonics has grown to be a major research area, primarily because of the ability to control and manipulate single quantum systems (emitters) and single photons on demand. For many years studying nanophotonic phenomena was limited to traditional semiconductors (including silicon and GaAs) and experiments were carried out predominantly at cryogenic temperatures. In the last decade, however, diamond has emerged as a new contender to study photonic phenomena at the nanoscale. Offering plethora of quantum emitters that are optically active at room temperature and ambient conditions, diamond has been exploited to demonstrate super-resolution microscopy and realize entanglement, Purcell enhancement and other quantum and classical nanophotonic effects. Elucidating the importance of diamond as a material, this review will highlight the recent achievements in the field of diamond nanophotonics, and convey a roadmap for future experiments and technological advancements.

Aharonovich, Igor

2014-01-01T23:59:59.000Z

22

Oppenheimer Diamond  

Science Journals Connector (OSTI)

...an uncut, light yellow, octahedral diamond crystal of 253.70 cts, found in 1964 in Dutoitspan Mine, South Africa. It was owned by Harry Winston and presented to Smithsonian Institution, Washington, DC, USA, in...

2009-01-01T23:59:59.000Z

23

An experimental investigation into oil mist lubrication  

E-Print Network [OSTI]

Oil mist lubrication offers many advantages over sump lubrication. Unfortunately, mist lubrication generates sub-micrometer sized aerosol particles (fines) that escape from the oil mist lubrication system. These particles are an environmental hazard...

Kannan, Krishna

2012-06-07T23:59:59.000Z

24

Power system with an integrated lubrication circuit  

DOE Patents [OSTI]

A power system includes an engine having a first lubrication circuit and at least one auxiliary power unit having a second lubrication circuit. The first lubrication circuit is in fluid communication with the second lubrication circuit.

Hoff, Brian D. (East Peoria, IL); Akasam, Sivaprasad (Peoria, IL); Algrain, Marcelo C. (Peoria, IL); Johnson, Kris W. (Washington, IL); Lane, William H. (Chillicothe, IL)

2009-11-10T23:59:59.000Z

25

Laser-processed three dimensional graphitic electrodes for diamond radiation detectors  

SciTech Connect (OSTI)

We have used an original approach for diamond detectors where three dimensional buried graphitic electrodes are processed in the bulk of a diamond substrate via laser-induced graphitization. Prototype made of polycrystalline chemical vapor deposition diamond was fabricated using a nanosecond UV laser. Its charge collection efficiency was evaluated using ?-particles emitted by a 241-Americium source. An improved charge collection efficiency was measured proving that laser micro-machining of diamond is a valid option for the future fabrication of three dimensional diamond detectors.

Caylar, Beno?-carett; Pomorski, Michal; Bergonzo, Philippe [CEA-LIST, Diamond Sensors Laboratory, Gif-sur-Yvette F-91191 (France)] [CEA-LIST, Diamond Sensors Laboratory, Gif-sur-Yvette F-91191 (France)

2013-07-22T23:59:59.000Z

26

Diamond fiber field emitters  

DOE Patents [OSTI]

A field emission electron emitter comprising an electrode formed of at least one diamond, diamond-like carbon or glassy carbon composite fiber, said composite fiber having a non-diamond core and a diamond, diamond-like carbon or glassy carbon coating on said non-diamond core, and electronic devices employing such a field emission electron emitter.

Blanchet-Fincher, Graciela B. (Wilmington, DE); Coates, Don M. (Santa Fe, NM); Devlin, David J. (Los Alamos, NM); Eaton, David F. (Wilmington, DE); Silzars, Aris K. (Landenburg, PA); Valone, Steven M. (Santa Fe, NM)

1996-01-01T23:59:59.000Z

27

Synthesis of new high performance lubricants and solid lubricants  

SciTech Connect (OSTI)

Synthesis and testing was begun on a number of new classes of lubricants: perfluoropolyethers (branching effects), perfluoromethylene oxide ethers, chlorine-substituted fluorocarbon polyethers, fluorine-containing branched ether lubricants, glycerine- based perfluoropolyesters, perfluoro epoxy ether chains, etc.

Lagow, R.J.

1993-04-01T23:59:59.000Z

28

Vehicle Technologies Office: Fuels and Lubricants Research  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fuels and Lubricants Fuels and Lubricants Research to someone by E-mail Share Vehicle Technologies Office: Fuels and Lubricants Research on Facebook Tweet about Vehicle Technologies Office: Fuels and Lubricants Research on Twitter Bookmark Vehicle Technologies Office: Fuels and Lubricants Research on Google Bookmark Vehicle Technologies Office: Fuels and Lubricants Research on Delicious Rank Vehicle Technologies Office: Fuels and Lubricants Research on Digg Find More places to share Vehicle Technologies Office: Fuels and Lubricants Research on AddThis.com... Just the Basics Hybrid & Vehicle Systems Energy Storage Advanced Power Electronics & Electrical Machines Advanced Combustion Engines Fuels & Lubricants Fuel Effects on Combustion Lubricants Natural Gas Research Biofuels End-Use Research

29

Synthesis and characterization of a nanocrystalline diamond aerogel  

Science Journals Connector (OSTI)

...this nanocrystalline diamond aerogel. Aerogels are a fascinating class of high surface-area...been made in the case of polycrystalline aerogels through the oxidative aggregation of...radiation detector with high density aerogels . IEEE T Nucl Sci 56 : 1475 – 1478 . 7 Schaefer...

Peter J. Pauzauskie; Jonathan C. Crowhurst; Marcus A. Worsley; Ted A. Laurence; A. L. David Kilcoyne; Yinmin Wang; Trevor M. Willey; Kenneth S. Visbeck; Sirine C. Fakra; William J. Evans; Joseph M. Zaug; Joe H. Satcher; Jr.

2011-01-01T23:59:59.000Z

30

US Synthetic Corp (TRL 4 Component) - The Development of Open...  

Broader source: Energy.gov (indexed) [DOE]

Polycrystalline Diamond Thrust Bearings for use in Marine Hydrokinetic (MHK) Energy Machines US Synthetic Corp (TRL 4 Component) - The Development of Open, Water Lubricated...

31

Synthesis of new high performance lubricants and solid lubricants  

SciTech Connect (OSTI)

We have started to make a number of classes of new perfluoropolyethers both in the solid lubricant area and liquid lubricant area. We have prepared some chlorofluoroethers for testing as additives for normal petroleum and polyalphaolefin lubricants which are so widely used in the United States. Perfluoropolyethers are not soluble in hydrocarbons. On the other hand, these chlorofluoropolyethers are soluble in substantial amounts in simple hydrocarbons. These are uniquely capable of being additives that flow with the motor oil or the polyalphaolefin.

Lagow, R.J.

1992-03-01T23:59:59.000Z

32

A Photo-Stimulated Low Electron Temperature High Current Diamond Film Field  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

A Photo-Stimulated Low Electron Temperature High Current Diamond A Photo-Stimulated Low Electron Temperature High Current Diamond Film Field Emission Cathode A Photo-Stimulated Low Electron Temperature High Current Diamond Film Field Emission Cathode Nanostructure diamond cathodes can operate at relatively moderate vacuum pressures due to the inert surface/vacuum interface. September 27, 2013 A Photo-Stimulated Low Electron Temperature High Current Diamond Film Field Emission Cathode Researchers at LANL have developed a novel, ultra-high-quality, robust electron source, which uses nanostructured polycrystalline diamond in a matrix with single-walled carbon nanotubes (SWCNs). Available for thumbnail of Feynman Center (505) 665-9090 Email A Photo-Stimulated Low Electron Temperature High Current Diamond Film Field Emission Cathode

33

14 - Lubricant use and disposal  

Science Journals Connector (OSTI)

Abstract: Criteria are defined for optimum machine-specific selection of conventional, high-performance and specialty lubricants. Lubrication consolidation is indicated as a means of rationalisation of inventories. Intended use of lubricants may be compromised by oxidation, water and air contamination, additive depletion and accumulation of contaminants, including wear debris, and biological degradation. Strategic oil analysis is described from simple in-shop sensory inspections to primary on-site standard testing and more comprehensive secondary testing methods as an operational maintenance tool for machine and lubricant condition monitoring to estimate remaining lubricant life time and prevent premature machine failure. The disposal of spent lubricants, including waste oil legislation and management, and re-refining technologies, are discussed.

Jan C.J. Bart; Emanuele Gucciardi; Stefano Cavallaro

2013-01-01T23:59:59.000Z

34

Fuel and Lubricant Effects | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Fuel and Lubricant Effects Fuel and Lubricant Effects 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation...

35

Fuel & Lubricant Technologies | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

& Lubricant Technologies Fuel & Lubricant Technologies 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting...

36

Fuel & Lubricant Technologies | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Fuel & Lubricant Technologies Fuel & Lubricant Technologies 2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation...

37

fuels and lubricants | netl.doe.gov  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fuels and Lubricants The DOE Vehicle Technologies Office supports fuels and lubricants research and development (R&D) to provide vehicle users with cost-competitive options that...

38

Polycrystalline semiconductor processing  

DOE Patents [OSTI]

A process is described for forming large-grain polycrystalline films from amorphous films for use as photovoltaic devices. The process operates on the amorphous film and uses the driving force inherent to the transition from the amorphous state to the crystalline state as the force which drives the grain growth process. The resultant polycrystalline film is characterized by a grain size that is greater than the thickness of the film. A thin amorphous film is deposited on a substrate. The formation of a plurality of crystalline embryos is induced in the amorphous film at predetermined spaced apart locations and nucleation is inhibited elsewhere in the film. The crystalline embryos are caused to grow in the amorphous film, without further nucleation occurring in the film, until the growth of the embryos is halted by impingement on adjacently growing embryos. The process is applicable to both batch and continuous processing techniques. In either type of process, the thin amorphous film is sequentially doped with p and n type dopants. Doping is effected either before or after the formation and growth of the crystalline embryos in the amorphous film, or during a continuously proceeding crystallization step. 10 figs.

Glaeser, A.M.; Haggerty, J.S.; Danforth, S.C.

1983-04-05T23:59:59.000Z

39

Thermal Conductivity of Polycrystalline Semiconductors and Ceramics  

E-Print Network [OSTI]

semiconductors and ceramics with desired thermalthermal conductivity of several polycrystalline semiconductors and ceramics,Thermal Conductivity of Polycrystalline Semiconductors and Ceramics

Wang, Zhaojie

2012-01-01T23:59:59.000Z

40

Characterization of Carbon-Based Biomaterials  

E-Print Network [OSTI]

conditions. It was found that the water content determined the uniqueness of this nature’s lubricant. The results of molecular dynamics (MD) simulation confirmed the hydration lubrication mechanisms. The polycrystalline diamond produced by plasma...

Zhou, Yan

2014-04-24T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Gelcasting Polycrystalline Alumina  

SciTech Connect (OSTI)

OSRAM SYLVANIA INC. is a major U.S. manufacturer of high-intensity lighting. Among its products is the Lumalux TM line of high-pressure sodium vapor arc lamps, which are used for industrial, highway, and street lighting. The key to the performance of these lamps is the polycrystalline alumina (PCA) tube that is used to contain the plasma that is formed in the electric arc. That plasma consists of ionized sodium, mercury, and xenon vapors. The key attributes of the PCA tubes are their transparency ({approximately}97% total transmittance in the visible), their refractoriness (inner wall temperature can reach l2OOC), and their chemical resistance (sodium and mercury vapor are extremely corrosive). The current efficiency of the lamps is very high, up to 100 initial lumens per watt. (Compare incandescent lamps 10-20 lumens per watt, fluorescent lamps 25-90 lumens per watt.)

Janney, M.A.; Zuk, K.J.; Wei, G.C.

2000-01-01T23:59:59.000Z

42

Defining the role of elastic lubricants and micro textured surfaces in lubricated, sliding friction  

E-Print Network [OSTI]

Solutions for reducing friction in sliding, lubricated systems include modifying lubricant rheology using polymers and adding a micro-scale texture to the sliding surfaces, but the mechanism of how lubrication properties ...

Hupp, Sara J. (Sara Jean), 1979-

2008-01-01T23:59:59.000Z

43

Fuels & Lubricant Technologies- FEERC  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fuels & Lubricants Technology Fuels & Lubricants Technology Fuels and lubricants research at FEERC involves study of the impacts of fuel and lubricant properties on advanced combustion processes as well as on emissions and emission control strategies and devices. The range of fuels studied includes liquid fuels from synthetic and renewable sources as well as conventional and unconventional fossil-based sources. Combustion and emissions studies are leveraged with relevant single and multi-cylinder engine setups in the FEERC and access to a suite of unique diagnostic tools and a vehicle dynamometer laboratory. ORNL/DOE research has been cited by EPA in important decisions such as the 2006 diesel sulfur rule and the 2010/2011 E15 waiver decision. Major program categories and examples

44

2014 Annual Merit Review Results Report - Fuels & Lubricants...  

Energy Savers [EERE]

Fuels & Lubricants Technologies 2014 Annual Merit Review Results Report - Fuels & Lubricants Technologies Merit review of DOE Vehicle Technologies research activities...

45

Ionic Liquids as Novel Lubricants and /or Lubricant Additives  

SciTech Connect (OSTI)

This ORNL-GM CRADA developed ionic liquids (ILs) as novel lubricants or oil additives for engine lubrication. A new group of oil-miscible ILs have been designed and synthesized with high thermal stability, non-corrosiveness, excellent wettability, and most importantly effective anti-scuffing/anti-wear and friction reduction characteristics. Mechanistic analysis attributes the superior lubricating performance of IL additives to their physical and chemical interactions with metallic surfaces. Working with a leading lubricant formulation company, the team has successfully developed a prototype low-viscosity engine oil using a phosphonium-phosphate IL as an anti-wear additive. Tribological bench tests of the IL-additized formulated oil showed 20-33% lower friction in mixed and elastohydrodynamic lubrication and 38-92% lower wear in boundary lubrication when compared with commercial Mobil 1 and Mobil Clean 5W-30 engine oils. High-temperature, high load (HTHL) full-size engine tests confirmed the excellent anti-wear performance for the IL-additized engine oil. Sequence VID engine dynamometer tests demonstrated an improved fuel economy by >2% for this IL-additized engine oil benchmarked against the Mobil 1 5W-30 oil. In addition, accelerated catalyst aging tests suggest that the IL additive may potentially have less adverse impact on three-way catalysts compared to the conventional ZDDP. Follow-on research is needed for further development and optimization of IL chemistry and oil formulation to fully meet ILSAC GF-5 specifications and further enhance the automotive engine efficiency and durability.

Qu, J. [ORNL; Viola, M. B. [General Motors Company

2013-10-31T23:59:59.000Z

46

Method For Testing Properties Of Corrosive Lubricants  

DOE Patents [OSTI]

A method of testing corrosive lubricating media using a wear testing apparatus without a mechanical seal. The wear testing apparatus and methods are effective for testing volatile corrosive lubricating media under pressure and at high temperatures.

Ohi, James (Denver, CO); De La Cruz, Jose L. (San Antonio, TX); Lacey, Paul I. (Wexford, IE)

2006-01-03T23:59:59.000Z

47

Copper doped polycrystalline silicon solar cell  

DOE Patents [OSTI]

Photovoltaic cells having improved performance are fabricated from polycrystalline silicon containing copper segregated at the grain boundaries.

Lovelace, Alan M. Administrator of the National Aeronautics and Space (La Canada, CA); Koliwad, Krishna M. (La Canada, CA); Daud, Taher (La Crescenta, CA)

1981-01-01T23:59:59.000Z

48

Diamond tool machining of materials which react with diamond  

DOE Patents [OSTI]

An apparatus is described for the diamond machining of materials which detrimentally react with diamond cutting tools in which the cutting tool and the workpiece are chilled to very low temperatures. This chilling halts or retards the chemical reaction between the workpiece and the diamond cutting tool so that wear rates of the diamond tool on previously detrimental materials are comparable with the diamond turning of materials which do not react with diamond. 1 figs.

Lundin, R.L.; Stewart, D.D.; Evans, C.J.

1992-04-14T23:59:59.000Z

49

CURRICULUM VITAE Howard J. Diamond  

E-Print Network [OSTI]

______________________ CURRICULUM VITAE FOR Howard J. Diamond ______________________ NOAA.diamond@noaa.gov or hjdiamond45@gmail.com #12;Curriculum Vitae Mr. Howard Jeffrey Diamond NOAA/National Climatic Data Center

50

Synthesis of new high performance lubricants and solid lubricants  

SciTech Connect (OSTI)

In our second year of funding we began the testing phase of a number of new classes of lubricants. Three different testing collaborations have already begun and a fourth one is In the works with Dr. Stephen Hsu of the National Institute of Standards and Technology. Dr. Hsu also plans to test some of the same materials for us that Shell Development is studying. With Dr. Bill Jones of NASA, we are studying the effects of branching an high temperature lubricant properties in perfluoropolyethers, Initially Bill Jones is comparing the lubrication and physical properties of perfluorotetraglyme and the following two spherical perfluoropolyethers, Note that one contains a fluorocarbon chain and the other one contains a fluorocarbon ether chain. The synthesis of these was reported in the last progress report. With Professor Patricia Thiel of Iowa State University, we are working on studies of perfluoromethylene oxide ethers and have prepared a series of four of these polyethers to study in collaboration with her research group. These perfluoromethylene oxide ethers have the best low temperature properties of any known lubricants. Thiel's group is studying their interactions with metals under extreme conditions. Thirdly, we have also begun an Interaction with W. August Birke of Shell Development Company in Houston for whom we have already prepared samples of the chlorine-substituted fluorocarbon polyether lubricants whose structures appear on page 54 of our research proposal. Each of these four structures is thought to have potential as lubricant additives to motor oils. We also have underway syntheses of other fluorine-containing branched ether lubricants. These new materials which are also promising as antifriction additives for motor oils appear ahead of the perfluoro additives as Appendix I to the progress report. Additionally for Birke and Shell Development we have at their request prepared the novel compound perfluoro salicylic acid. This synthesis was suggested by the Shell staff who thought that esters of perfluoro salicylic acid might be an excellent antifriction additive for motor oil fuels. One of the best additives currently used in motor oils is the hydrocarbon ester of salicylic acid.

Lagow, Richard J.

1993-04-08T23:59:59.000Z

51

Diamond films: Historical perspective  

SciTech Connect (OSTI)

This section is a compilation of notes and published international articles about the development of methods of depositing diamond films. Vapor deposition articles are included from American, Russian, and Japanese publications. The international competition to develop new deposition methodologies is stressed. The current status of chemical vapor deposition of diamond is assessed.

Messier, R. [Pennsylvania State Univ., University Park (United States)

1993-01-01T23:59:59.000Z

52

Synthesis of new high performance lubricants and solid lubricants. Progress report, April 1992--March 1993  

SciTech Connect (OSTI)

Synthesis and testing was begun on a number of new classes of lubricants: perfluoropolyethers (branching effects), perfluoromethylene oxide ethers, chlorine-substituted fluorocarbon polyethers, fluorine-containing branched ether lubricants, glycerine- based perfluoropolyesters, perfluoro epoxy ether chains, etc.

Lagow, R.J.

1993-04-01T23:59:59.000Z

53

Low Reactivity SI Engine Lubricant Program  

Broader source: Energy.gov [DOE]

Results showed that lubricant improvement allowed up to 4 degree improvement in spark advance at knock limited conditions resulting in potentially over 3 percent indicated efficiency improvement

54

Research on Fuels & Lubricants | Department of Energy  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Fuels lDimethyl Ether Rheology and Materials Studies Natural Oils - The Next Generation of Diesel Engine Lubricants? Combined Heat and Power, Waste Heat, and District Energy...

55

Vehicle Technologies Office: Lubricants | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Batteries Fuel Efficiency & Emissions Combustion Engines Fuel Effects on Combustion Idle Reduction Emissions Waste Heat Recovery Lightweighting Parasitic Loss Reduction Lubricants...

56

Characteristics and Effects of Lubricant Additive Chemistry...  

Broader source: Energy.gov (indexed) [DOE]

Characteristics and Effects of Lubricant Additive Chemistry and Exhaust Conditions on Diesel Particulate Filter Service Life and Vehicle Fuel Economy A Consortium to Optimize...

57

The diamonds of South Australia  

Science Journals Connector (OSTI)

Diamonds in South Australia occur in kimberlites at Eurelia (Orroroo), and in placer deposits, which include the Springfield Basin and the historic Echunga goldfield. To identify the kimberlitic and mantle sources of the placer diamonds, and to determine any possible connections between the placer diamonds and the diamonds from the Eurelia kimberlites, we examined the physical and compositional characteristics, and the mineral inclusion content of 122 diamonds from the Springfield Basin and 43 diamonds from kimberlites at Eurelia. Additional morphological data for three Echunga diamonds are also given. Most of the diamonds from the Springfield Basin are similar to the diamonds from Eurelia with respect to their crystal shapes, surface textures, and colors. The diamond populations from both areas are characterized by a high abundance of low-nitrogen (Basin diamonds are similar to the Eurelia diamonds with ?13C values in the range ? 20.0 to ? 2.5‰, and a mode at ? 6.5‰. Ferropericlase inclusions in two diamonds from the Springfield Basin are consistent with ferropericlase-bearing mineral inclusion assemblages found in the Eurelia diamonds and indicate that part of the diamond population from both areas is of sublithospheric origin. One diamond from the Springfield Basin contained an inclusion of lherzolitic garnet. The overall similarities between the Springfield Basin and Eurelia diamonds indicates that the bulk of the Springfield Basin diamonds are derived from kimberlitic sources that are similar (or identical) to those at Eurelia. However, three diamonds from the Springfield Basin are markedly distinct. These have well-developed crystal shapes, large sizes, yellow body colorations, and brown irradiation spots. The brown irradiation spots and abrasion textures provide evidence that these diamonds are much older than the other diamonds in the Springfield Basin, and that they are derived from distal kimberlitic sources. The diamonds are most likely derived from Permian glacigene sediments and may ultimately be sourced from kimberlites on the East Antarctic craton. Abrasion textures and brown irradiation spots are also present on diamonds from Echunga. This provides a link to the three “old” Springfield Basin diamonds and other alluvial diamonds in Eastern Australia, and suggests that Permian glaciations caused a widespread distribution of diamonds over large parts of southern Australia, which at that time was part of the supercontinent Gondwana.

Ralf Tappert; John Foden; Thomas Stachel; Karlis Muehlenbachs; Michelle Tappert; Kevin Wills

2009-01-01T23:59:59.000Z

58

Detailed Characterization of Lubricant-Derived Ash-Related Species...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Characterization of Lubricant-Derived Ash-Related Species in Diesel Exhaust and Aftertreatment Systems Detailed Characterization of Lubricant-Derived Ash-Related Species in Diesel...

59

Lubricant Formulation and Consumption Effects on Diesel Exhaust...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Lubricant Formulation and Consumption Effects on Diesel Exhaust Ash Emissions: Lubricant Formulation and Consumption Effects on Diesel Exhaust Ash Emissions: 2005 Diesel Engine...

60

Lubricants - Pathway to Improving Fuel Efficiency of Legacy Fleet...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

for low-viscosity lubricants and low-friction surfaces and additives to reduce fuel consumption, and impact of such approaches on other critical lubricant metrics...

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

The Role of Lubricant Additives in Fuel Efficiency and Emission...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Lubricant Additives in Fuel Efficiency and Emission Reductions: Viscosity Effects The Role of Lubricant Additives in Fuel Efficiency and Emission Reductions: Viscosity Effects...

62

Axial bearing with gas lubrication for marine turbines  

Science Journals Connector (OSTI)

The possibility of enhancing the carrying capacity of the lubricant layer in bearings with gas lubrication is considered, for marine turbines. The basic design features of the hybrid...

M. V. Gribinichenko; A. V. Kurenskii; N. V. Sinenko

2013-10-01T23:59:59.000Z

63

Friction Modeling for Lubricated Engine and Drivetrain Components...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Modeling for Lubricated Engine and Drivetrain Components Friction Modeling for Lubricated Engine and Drivetrain Components 2010 DOE Vehicle Technologies and Hydrogen Programs...

64

Fuels & Lubricants R&D | Department of Energy  

Office of Environmental Management (EM)

Fuels & Lubricants R&D Fuels & Lubricants R&D 2011 DOE Hydrogen and Fuel Cells Program, and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Vehicle...

65

Collaborative Lubricating Oil Study on Emissions (CLOSE) Project...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Collaborative Lubricating Oil Study on Emissions (CLOSE) Project Collaborative Lubricating Oil Study on Emissions (CLOSE) Project Extensive chemical and physical characterization...

66

Biodiesel Impact on Engine Lubricant Oil Dilution | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Impact on Engine Lubricant Oil Dilution Biodiesel Impact on Engine Lubricant Oil Dilution Heavy-duty engine and light-duty vehicle experiments were conducted to investigate the...

67

Reducing Lubricant Ash Impact on Exhaust Aftertreatment with...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Lubricant Ash Impact on Exhaust Aftertreatment with a Oil Conditioning Filter Reducing Lubricant Ash Impact on Exhaust Aftertreatment with a Oil Conditioning Filter Under the test...

68

Minimizing Lubricant-Ash Requirement and Impact on Emission Aftertreat...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Lubricant-Ash Requirement and Impact on Emission Aftertreatment Systems via an Oil Conditioning Filter Minimizing Lubricant-Ash Requirement and Impact on Emission...

69

Diamond nanobeam waveguide optomechanics  

E-Print Network [OSTI]

Optomechanical devices sensitively transduce and actuate motion of nanomechanical structures using light, and are central to many recent fundamental studies and technological advances. Single--crystal diamond promises to improve the performance of optomechanical devices, while also providing opportunities to interface nanomechanics with diamond color center spins and related quantum technologies. Here we demonstrate measurement of diamond nanobeam resonators with a sensitivity of 9.5 fm/Hz^0.5 and bandwidth >120 nm through dissipative waveguide--optomechanical coupling. Nanobeams are fabricated from bulk single--crystal diamond using a scalable quasi--isotropic oxygen plasma undercut etching process, and support mechanical resonances with quality factor of 2.5 x 10^5 at room temperature, and 7.2 x 10^5 in cryogenic conditions (5K). Mechanical self--oscillations, resulting from interplay between optomechanical coupling and the photothermal response of nanobeams in a buckled state, are observed with amplitude e...

Khanaliloo, Behzad; Hryciw, Aaron C; Lake, David P; Kaviani, Hamidreza; Barclay, Paul E

2015-01-01T23:59:59.000Z

70

Amorphous diamond films  

DOE Patents [OSTI]

Amorphous diamond films having a significant reduction in intrinsic stress are prepared by biasing a substrate to be coated and depositing carbon ions thereon under controlled temperature conditions. 1 fig.

Falabella, S.

1998-06-09T23:59:59.000Z

71

Theoretical study on the lubrication failure for the lubricants with a limiting shear stress  

Science Journals Connector (OSTI)

It is observed that the non-slip boundary conditions in the classical lubrication theory are not valid for lubricant with a limiting shear stress. By determining the position of the maximum shear stress and changing velocity boundary condition to stress condition, slip lubrication equations are deduced. With numerical solution of the equations, the location and scale of the boundary slip are analyzed. Finally, after the influences of the slip on the lubrication properties are discussed, results show that a significant decrease of the load carrying capacity causes slip lubrication failure.

Huang Ping; Luo Jianbin; Wen Shizhu

1999-01-01T23:59:59.000Z

72

Tribological Characterization of Carbon Based Solid Lubricants  

E-Print Network [OSTI]

lubrication modes. ..................... 10 Figure 5. Typical Stribeck Curve [22]. ..................................................................... 11 Figure 6. This figure illustrates the lamellar structure of graphite. ........................... 13... or low pressures, and high and low operating speeds. For purposes of this research, the extreme conditions will refer to high temperatures, and low pressures. The most common types of solid lubricants encompass four materials: graphite, molybdenum...

Sanchez, Carlos Joel

2012-10-19T23:59:59.000Z

73

Diamond-graphite field emitters  

DOE Patents [OSTI]

A field emission electron emitter comprising an electrode of diamond and a conductive carbon, e.g., graphite, is provided.

Valone, Steven M. (Santa Fe, NM)

1997-01-01T23:59:59.000Z

74

Elastohydrodynamic Lubrication with Polyolester Lubricants and HFC Refrigerants, Final Report, Volume 2  

SciTech Connect (OSTI)

Lubrication properties of refrigeration lubricants were investigated in high pressure nonconforming contacts under different conditions of temperature, rolling speed, and refrigerant concentration. The program was based upon the recognition that the lubrication regime in refrigeration compressors is generally elastohydrodynamic or hydrodynamic, as determined by the operating conditions of the compressor and the properties of the lubricant. Depending on the compressor design, elastohydrodynamic lubrication conditions exist in many rolling and sliding elements of refrigeration compressors such as roller element bearings, gears, and rotors. The formation of an elastohydrodynamic film separating rubbing surfaces is important in preventing the wear and failure of compressor elements. It is, therefore, important to predict the elastohydrodynamic (EHD) performance of lubricants under realistic tribocontact renditions. This is, however, difficult as the lubricant properties that control film formation are critically dependent upon pressure and shear, and cannot be evaluated using conventional laboratory instruments. In this study, the elastohydrodynamic behavior of refrigeration lubricants with and without the presence of refrigerants was investigated using the ultrathin film EHD interferometry technique. This technique enables very thin films, down to less than 5 nm, to be measured accurately within an EHD contact under realistic conditions of temperature, shear, and pressure. The technique was adapted to the study of lubricant refrigerant mixtures. Film thickness measurements were obtained on refrigeration lubricants as a function of speed, temperature, and refrigerant concentration. The effects of lubricant viscosity, temperature, rolling speed, and refrigerant concentration on EHD film formation were investigated. From the film thickness measurements, effective pressure-viscosity coefficients were calculated. The lubricants studied in this project included two naphthenic mineral oils (NMO), four polyolesters (POE), and two polyvinyl ether (PVE) fluids. These fluids represented viscosity grades of ISO 32 and ISO 68 and are shown in a table. Refrigerants studied included R-22, R-134a, and R-410A. Film thickness measurements were conducted at 23 C, 45 C, and 65 C with refrigerant concentrations ranging from zero to 60% by weight.

Gunsel, Selda; Pozebanchuk, Michael

1999-04-01T23:59:59.000Z

75

Synthesis of new high performance lubricants and solid lubricants. Progress report, June 1991--March 1992  

SciTech Connect (OSTI)

We have started to make a number of classes of new perfluoropolyethers both in the solid lubricant area and liquid lubricant area. We have prepared some chlorofluoroethers for testing as additives for normal petroleum and polyalphaolefin lubricants which are so widely used in the United States. Perfluoropolyethers are not soluble in hydrocarbons. On the other hand, these chlorofluoropolyethers are soluble in substantial amounts in simple hydrocarbons. These are uniquely capable of being additives that flow with the motor oil or the polyalphaolefin.

Lagow, R.J.

1992-03-01T23:59:59.000Z

76

Preparation of synthetic hydrocarbon lubricants  

SciTech Connect (OSTI)

A process is described for preparing synthetic lubricating materials which process comprises: (a) reacting (i) at least a portion of a reaction product of the liquid phase oligomerization of propylene, butylene or mixtures thereof containing a C/sub 6/ olefin component, (ii) a linear olefin reactant having an average carbon number ranging from about 10 to about 18 in the presence of a catalyst, (b) separating from the reaction mixture of (a) hydrocarbons which distill at a temperature above about 660/sup 0/ F. (316/sup 0/ C.), and (c) hydrogenating the reaction product of (b) by contact with hydrogen with or without a catalyst at a temperature ranging from about 25/sup 0/ C. to about 300/sup 0/ C.

Johnson, T.H.

1986-10-07T23:59:59.000Z

77

Lubricity of Components of Biodiesel and Petrodiesel. The Origin of Biodiesel Lubricity  

Science Journals Connector (OSTI)

Lubricity of Components of Biodiesel and Petrodiesel. ... The use of vegetable oil based fuels, called biodiesels, lowers particulate emissions due to the increased oxygen content of the fuel. ...

Gerhard Knothe; Kevin R. Steidley

2005-04-06T23:59:59.000Z

78

Metallic Wear in the Presence of Lubricants  

Science Journals Connector (OSTI)

... or adhesion of one to the other leading to a roughness; the extent of this roughening and of the consequent wear is determined by the continuity of the film of lubricant ...

1936-03-28T23:59:59.000Z

79

Biodiesel Impact on Engine Lubricant Oil Dilution  

Broader source: Energy.gov (indexed) [DOE]

Impact on Engine Lubricant Oil Dilution Xin He, Aaron M. Williams, Earl D. Christensen, Jonathan L. Burton, Robert L. McCormick National Renewable Energy Laboratory October 5, 2011...

80

Advanced lubrication systems and materials. Final report  

SciTech Connect (OSTI)

This report described the work conducted at the National Institute of Standards and Technology under an interagency agreement signed in September 1992 between DOE and NIST for 5 years. The interagency agreement envisions continual funding from DOE to support the development of fuel efficient, low emission engine technologies in terms of lubrication, friction, and wear control encountered in the development of advanced transportation technologies. However, in 1994, the DOE office of transportation technologies was reorganized and the tribology program was dissolved. The work at NIST therefore continued at a low level without further funding from DOE. The work continued to support transportation technologies in the development of fuel efficient, low emission engine development. Under this program, significant progress has been made in advancing the state of the art of lubrication technology for advanced engine research and development. Some of the highlights are: (1) developed an advanced high temperature liquid lubricant capable of sustaining high temperatures in a prototype heat engine; (2) developed a novel liquid lubricant which potentially could lower the emission of heavy duty diesel engines; (3) developed lubricant chemistries for ceramics used in the heat engines; (4) developed application maps for ceramic lubricant chemistry combinations for design purpose; and (5) developed novel test methods to screen lubricant chemistries for automotive air-conditioning compressors lubricated by R-134a (Freon substitute). Most of these findings have been reported to the DOE program office through Argonne National Laboratory who manages the overall program. A list of those reports and a copy of the report submitted to the Argonne National Laboratory is attached in Appendix A. Additional reports have also been submitted separately to DOE program managers. These are attached in Appendix B.

Hsu, S.

1998-05-07T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Lower pressure synthesis of diamond material  

DOE Patents [OSTI]

Methods of synthesizing a diamond material, particularly nanocrystalline diamond, diamond-like carbon and bucky diamond are provided. In particular embodiments, a composition including a carbon source, such as coal, is subjected to addition of energy, such as high energy reactive milling, producing a milling product enriched in hydrogenated tetrahedral amorphous diamond-like carbon compared to the coal. A milling product is treated with heat, acid and/or base to produce nanocrystalline diamond and/or crystalline diamond-like carbon. Energy is added to produced crystalline diamond-like carbon in particular embodiments to produce bucky diamonds.

Lueking, Angela (State College, PA); Gutierrez, Humberto (State College, PA); Narayanan, Deepa (Redmond, WA); Burgess Clifford, Caroline E. (State College, PA); Jain, Puja (King Of Prussia, PA)

2010-07-13T23:59:59.000Z

82

Compatibility of lubricant additives with HFC refrigerants and synthetic lubricants. Final report, Part 1  

SciTech Connect (OSTI)

Part one of this research provides manufacturers of components of air-conditioning and refrigeration equipment with a useful list of lubricant additives, sources, functional properties and chemical species. The list in part one is comprised of domestic lubricant additive suppliers and the results of a literature search that was specifically targeted for additives reported to be useful in polyolester chemistry.

Cavestri, R.C. [Imagination Resources, Inc., Dublin, OH (United States)

1997-07-01T23:59:59.000Z

83

DIAMOND SECONDARY EMITTER  

SciTech Connect (OSTI)

We present the design and experimental progress on the diamond secondary emitter as an electron source for high average power injectors. The design criteria for average currents up to 1 A and charge up to 20 nC are established. Secondary Electron Yield (SEY) exceeding 200 in transmission mode and 50 in emission mode have been measured. Preliminary results on the design and fabrication of the self contained capsule with primary electron source and secondary electron emitter will also be presented.

BEN-ZVI, I.; RAO, T.; BURRILL, A.; CHANG, X.; GRIMES, J.; RANK, J.; SEGALOV, Z.; SMEDLEY, J.

2005-10-09T23:59:59.000Z

84

Diamond turning of glass  

SciTech Connect (OSTI)

A new research initiative will be undertaken to investigate the critical cutting depth concepts for single point diamond turning of brittle, amorphous materials. Inorganic glasses and a brittle, thermoset polymer (organic glass) are the principal candidate materials. Interrupted cutting tests similar to those done in earlier research are Ge and Si crystals will be made to obtain critical depth values as a function of machining parameters. The results will provide systematic data with which to assess machining performance on glasses and amorphous materials

Blackley, W.S.; Scattergood, R.O.

1988-12-01T23:59:59.000Z

85

Lubricants- Pathway to Improving Fuel Efficiency of Legacy Fleet Vehicles  

Broader source: Energy.gov [DOE]

Reviews recent studies on potential for low-viscosity lubricants and low-friction surfaces and additives to reduce fuel consumption, and impact of such approaches on other critical lubricant metrics

86

Renewable Fuels and Lubricants Laboratory (Fact Sheet), NREL...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Renewable Fuels and Lubricants Laboratory State-of-the-Art Fuel and Vehicle Testing The Renewable Fuels and Lubricants (ReFUEL) Laboratory at the U.S. Department of Energy's...

87

Overview of DOE Fuel & Lubricant Technologies R&D | Department...  

Office of Environmental Management (EM)

Overview of DOE Fuel & Lubricant Technologies R&D Overview of DOE Fuel & Lubricant Technologies R&D 2010 DOE Vehicle Technologies and Hydrogen Programs Annual Merit Review and Peer...

88

Multi component Nanoparticle Based Lubricant Additive to Improve...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

More Documents & Publications Multi-component Nanoparticle Based Lubricant Additive to Improve Efficiency and Durability in Engines ITP Nanomanufacturing:...

89

Vehicle Technologies Office: Fuels and Lubricants Research  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Fuels and Lubricants Research Fuels and Lubricants Research As transportation accounts for two-thirds of the nearly $1 billion the U.S. spends daily on foreign oil, it is vital to increase our use of alternative fuels. Increasing the fuels available to drivers reduces price volatility, supports domestic industries, and increases environmental sustainability. The DOE's Alternative Fuels Data Center provides basic information on alternative fuels, including Biodiesel, Ethanol, Natural Gas, Propane, and Hydrogen. The Vehicle Technologies Office (VTO) supports research to improve how vehicles use these many of these fuels in the future, as well as activities to increase their availability today. It also researches how new petroleum-based fuels affect advanced combustion systems and how lubricants can improve the efficiency of vehicles currently on the road.

90

Tribological behavior of some candidate advanced space lubricants  

SciTech Connect (OSTI)

Performance of a variety of space lubricants was compared under boundary and elastohydrodynamic lubrication (EHL). The types of fluids studied were naphthenic mineral oil, paraffinic mineral oil, polyalphaolefin, and silahydrocarbon. The silahydrocarbon and the polyalphaolefin lubricants exhibited lower traction under similar conditions. A specific additive package increased the traction of the polyalphaolefin. Volatility characteristics of some of these fluids were also studied. 10 refs.

Sharma, S.K.; Snyder, C.E. Jr.; Gschwender, L.J. (USAF, Wright Lab., Wright-Patterson AFB, OH (United States))

1993-04-01T23:59:59.000Z

91

Guidelines for maintaining steam turbine lubrication systems. Final report  

SciTech Connect (OSTI)

Failures of steam turbine bearings and rotors cost the utility industry an estimated $150 million a year. A third of these failures involve contaminated lubricants or malfunctioning lubricant supply system components. This report, outlining a comprehensive surveillance program, presents guidelines for maintaining major elements in the turbine lubrication system.

Lamping, G.A.; Cuellar, J.P. Jr.; Silvus, H.S.; Barsun, H.F.

1986-07-01T23:59:59.000Z

92

Muon States in Polycrystalline and Amorphous Silicon [and Discussion  

Science Journals Connector (OSTI)

15 February 1995 research-article Muon States in Polycrystalline and Amorphous Silicon [and Discussion] E. A. Davis A. Singh S. F. J. Cox A. M. Stoneham M. Symons Muons implanted into polycrystalline and amorphous silicon have been...

1995-01-01T23:59:59.000Z

93

High efficiency diamond solar cells  

DOE Patents [OSTI]

A photovoltaic device and method of making same. A layer of p-doped microcrystalline diamond is deposited on a layer of n-doped ultrananocrystalline diamond such as by providing a substrate in a chamber, providing a first atmosphere containing about 1% by volume CH.sub.4 and about 99% by volume H.sub.2 with dopant quantities of a boron compound, subjecting the atmosphere to microwave energy to deposit a p-doped microcrystalline diamond layer on the substrate, providing a second atmosphere of about 1% by volume CH.sub.4 and about 89% by volume Ar and about 10% by volume N.sub.2, subjecting the second atmosphere to microwave energy to deposit a n-doped ultrananocrystalline diamond layer on the p-doped microcrystalline diamond layer. Electrodes and leads are added to conduct electrical energy when the layers are irradiated.

Gruen, Dieter M. (Downers Grove, IL)

2008-05-06T23:59:59.000Z

94

A Diamond Trilogy: Superplumes, Supercontinents, and Supernovae  

Science Journals Connector (OSTI)

...the fourth most abundant element in the solar system after hydrogen, helium, and oxygen...explosions, other diamonds bear witness to solar system formation, and diamonds from our...the implications of diamond for Earth and solar system processes. Diamond Synthesis The many...

Stephen E. Haggerty

1999-08-06T23:59:59.000Z

95

Exploring Low Emission Lubricants for Diesel Engines  

SciTech Connect (OSTI)

A workshop to explore the technological issues involved with the removal of sulfur from lubricants and the development of low emission diesel engine oils was held in Scottsdale, Arizona, January 30 through February 1, 2000. It presented an overview of the current technology by means of panel discussions and technical presentations from industry, government, and academia.

Perez, J. M.

2000-07-06T23:59:59.000Z

96

Inertial Lubrication Theory N. O. Rojas,1  

E-Print Network [OSTI]

Inertial Lubrication Theory N. O. Rojas,1 M. Argentina,1 E. Cerda,2 and E. Tirapegui3 1 Universite on the boundary conditions enforced, the energy input and the specific Reynolds number of the fluid motion. Here input of energy. We derive the minimal set of equations containing inertial effects in this strongly

Argentina, Mederic

97

Examination of failed ex vivo metal-on-metal metatarsophalangeal prosthesis and comparison with theoretically determined lubrication regimes  

Science Journals Connector (OSTI)

Replacement of the first metatarsophalangeal (MTP) joint is a relatively uncommon procedure compared with hip and knee arthroplasty. A cobalt chrome-on-cobalt chrome MTP prosthesis, which had a diamond-like carbon (DLC) coating applied to its articulating faces, was obtained for ex vivo analysis. By modelling the ball and socket implant as an equivalent ball-on-plane model and employing elastohydrodynamic theory, the predicted lubrication regimes applicable to this implant design were determined. These calculations were undertaken for a 10–1500 N range of loading values and a 0–30 mm/s range of entraining velocities, for both worn and unworn situations. Calculations showed that the implant would almost always operate in the boundary lubrication regime. The presence of scratches on the articulating faces of the ex vivo sample further implied boundary lubrication. The DLC coating had been removed from the entire face of the phalangeal component and from most of the face of the metatarsal component. From the latter it appeared as if the coating had been scratched and then flaked away parallel to the scratches. In turn this suggested a corrosion based failure of the interface between the DLC coating and the cobalt chrome subsurface.

T.J. Joyce

2007-01-01T23:59:59.000Z

98

Examination of the Material Removal Rate in Lapping Polycrystalline Diamond Compacts  

E-Print Network [OSTI]

.......................................................... 7 1.2.1.2. Abrasives ............................................................................. 9 1.2.1.3. Abrasive Vehicle ................................................................. 9 1.2.1.4. Kinematics... ..................................................................... 17 3.2.2. Suspension Vehicle Preparation ............................................. 18 3.2.3. Specimen Holder Preparation ................................................. 19 3.2.3.1. Rubber Sample Holders...

Sowers, Jason Michael

2012-10-19T23:59:59.000Z

99

Infrared refractive index of diamond  

Science Journals Connector (OSTI)

The refractive index of natural Type IIa diamond is reported for the spectral region 2.5-25 µm. The data have been fitted to a Herzberger-type dispersion formula with a quality of...

Edwards, David F; Ochoa, Ellen

1981-01-01T23:59:59.000Z

100

Amorphous-diamond electron emitter  

DOE Patents [OSTI]

An electron emitter comprising a textured silicon wafer overcoated with a thin (200 .ANG.) layer of nitrogen-doped, amorphous-diamond (a:D-N), which lowers the field below 20 volts/micrometer have been demonstrated using this emitter compared to uncoated or diamond coated emitters wherein the emission is at fields of nearly 60 volts/micrometer. The silicon/nitrogen-doped, amorphous-diamond (Si/a:D-N) emitter may be produced by overcoating a textured silicon wafer with amorphous-diamond (a:D) in a nitrogen atmosphere using a filtered cathodic-arc system. The enhanced performance of the Si/a:D-N emitter lowers the voltages required to the point where field-emission displays are practical. Thus, this emitter can be used, for example, in flat-panel emission displays (FEDs), and cold-cathode vacuum electronics.

Falabella, Steven (Livermore, CA)

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Fabrication of amorphous diamond films  

DOE Patents [OSTI]

Amorphous diamond films having a significant reduction in intrinsic stress are prepared by biasing a substrate to be coated and depositing carbon ions thereon under controlled temperature conditions. 1 fig.

Falabella, S.

1995-12-12T23:59:59.000Z

102

Method of Dehalogenation using Diamonds  

SciTech Connect (OSTI)

A method for preparing olefins and halogenated olefins is provided comprising contacting halogenated compounds with diamonds for a sufficient time and at a sufficient temperature to convert the halogenated compounds to olefins and halogenated olefins via elimination reactions.

Farcasiu, Malvina; Kaufman, Phillip B.; Ladner, Edward P.; Anderson, Richard R.

1999-02-26T23:59:59.000Z

103

Characterization of electrochemically modified polycrystalline platinum surfaces  

SciTech Connect (OSTI)

The characterization of electrochemically modified polycrystalline platinum surfaces has been accomplished through the use of four major electrochemical techniques. These were chronoamperometry, chronopotentiommetry, cyclic voltammetry, and linear sweep voltammetry. A systematic study on the under-potential deposition of several transition metals has been performed. The most interesting of these were: Ag, Cu, Cd, and Pb. It was determined, by subjecting the platinum electrode surface to a single potential scan between {minus}0.24 and +1.25 V{sub SCE} while stirring the solution, that the electrocatalytic activity would be regenerated. As a consequence of this study, a much simpler method for producing ultra high purity water from acidic permanganate has been developed. This method results in water that surpasses the water produced by pyrocatalytic distillation. It has also been seen that the wettability of polycrystalline platinum surfaces is greatly dependent on the quantity of oxide present. Oxide-free platinum is hydrophobic and gives a contact angle in the range of 55 to 62 degrees. We have also modified polycrystalline platinum surface with the electrically conducting polymer poly-{rho}-phenylene. This polymer is very stable in dilute sulfuric acid solutions, even under applied oxidative potentials. It is also highly resistant to electrochemical hydrogenation. The wettability of the polymer modified platinum surface is severely dependent on the choice of supporting electrolyte chosen for the electrochemical polymerization. Tetraethylammonium tetrafluoroborate produces a film that is as hydrophobic as Teflon, whereas tetraethylammonium perchlorate produces a film that is more hydrophilic than oxide-free platinum.

Krebs, L.C.; Ishida, Takanobu.

1991-12-01T23:59:59.000Z

104

Rubber friction on (apparently) smooth lubricated surfaces  

E-Print Network [OSTI]

We study rubber sliding friction on hard lubricated surfaces. We show that even if the hard surface appears smooth to the naked eye, it may exhibit short wavelength roughness, which may give the dominant contribution to rubber friction. That is, the observed sliding friction is mainly due to the viscoelastic deformations of the rubber by the substrate surface asperities. The presented results are of great importance for rubber sealing and other rubber applications involving (apparently) smooth surfaces.

M. Mofidi; B. Prakash; B. N. J. Persson; O. Albohl

2007-10-18T23:59:59.000Z

105

Effects of diffusion on lubricant distribution under flying headon thin-film disks  

Science Journals Connector (OSTI)

Lubricants on thin-film disks have large effects on head–disk interface characteristics. They reduce head and disk wear while thick lubricant film increases friction ... in many cases. Lubricant depletion due to

K. Yanagisawa; Y. Kawakubo; M. Yoshino

2005-01-01T23:59:59.000Z

106

Overview of DOE Fuel & Lubricant Technologies R&D  

Office of Environmental Management (EM)

friendly highway transportation technologies that enable America to use less petroleum. --EERE Strategic Plan, October 2002-- Overview of DOE Fuel & Lubricant Technologies...

107

Controlled Experiments on the Effects of Lubricant/Additive ...  

Broader source: Energy.gov (indexed) [DOE]

Ashless) Characteristics on DPF Degradation Effects of lubricant additive chemistries and exhaust conditions on ash properties affecting diesel particulate filter performance....

108

Experimental and Theoretical Investigation of Lubricant and Additive...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Theoretical Investigation of Lubricant and Additive Effects on Engine Friction Combining data from motored engine friction, a theoretical engine model, a line friction contact...

109

Effects of Fuel Dilution with Biodiesel on Lubricant Acidity...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Affecting Fuel Economy and Engine Wear Reducing Lubricant Ash Impact on Exhaust Aftertreatment with a Oil Conditioning Filter Development of High Performance Heavy Duty Engine Oils...

110

Characteristics and Effects of Lubricant Additive Chemistry and...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Characteristics and Effects of Lubricant Additive Chemistry and Exhaust Conditions on Diesel Particulate Filter Service Life and Vehicle Fuel Economy Characteristics and Effects of...

111

Calculations of Phosphorous Electronic Levels in Diamond  

Science Journals Connector (OSTI)

The present paper is dedicated to the simulation of phosphorus entering into diamond and its influence upon the vacancy in diamond, using the theory of shallow donor states and the tight-binding theory (TBT).

Valentine V. Tokiy; Diana L. Savina

1995-01-01T23:59:59.000Z

112

E-Print Network 3.0 - advanced lubrication systems Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

cutting Cost: Considering all aspects such as lubricant cost per part, application and removal system... consistent lubrication thickness with proper instrumentation. ......

113

E-Print Network 3.0 - actively lubricated journal Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

-align and mount to the hydrophilic trench binding sites with electric connections by heat curable lubricant oil... ) lubricant oil covers only hydrophilic nickel surface of PZT...

114

Influence of boric acid additive size on green lubricant performance  

Science Journals Connector (OSTI)

...of these were automotive lubricants-engine oils and transmission fluids-whereas...P. Turgis, and S. Lamouri1996A general approach to discontinuous transfer films...Method to improve lubricity of low-sulfur diesel and gasoline fuelsUS Patent no. 6783561...

2010-01-01T23:59:59.000Z

115

Neutron Bombardment of Counting Diamonds  

Science Journals Connector (OSTI)

21 February 1956 research-article Neutron Bombardment of Counting Diamonds A. H...Examination was also made of the effect of neutron bombardment on pulse-height distribution...additional charge traps produced by the neutrons. The layered crystal texture disclosed...

1956-01-01T23:59:59.000Z

116

Polycrystalline?thin?film thermophotovoltaic cells  

Science Journals Connector (OSTI)

Thermophotovoltaic (TPV) cells convert thermal energy to electricity. Modularity portability silent operation absence of moving parts reduced air pollution rapid start?up high power densities potentially high conversion efficiencies choice of a wide range of heat sources employing fossil fuels biomass and even solar radiation are key advantages of TPV cells in comparison with fuel cells thermionic and thermoelectric convertors and heat engines. The potential applications of TPV systems include: remote electricity supplies transportation co?generation electric?grid independent appliances and space aerospace and military power applications. The range of bandgaps for achieving high conversion efficiencies using low temperature (1000–2000 K) black?body or selective radiators is in the 0.5–0.75 eV range. Present high efficiency convertors are based on single crystalline materials such as In1?x Ga x As GaSb and Ga1?x In x Sb. Several polycrystalline thin films such as Hg1?x Cd x Te Sn1?x Cd2x Te2 and Pb1?x Cd x Te etc. have great potential for economic large?scale applications. A small fraction of the high concentration of charge carriers generated at high fluences effectively saturates the large density of defects in polycrystalline thin films. Photovoltaic conversion efficiencies of polycrystalline thin films and PV solar cells are comparable to single crystalline Si solar cells e.g. 17.1% for CuIn1?x Ga x Se2 and 15.8% for CdTe. The best recombination?state density N t is in the range of 10?15–10?16 cm?3 acceptable for TPV applications. Higher efficiencies may be achieved because of the higher fluences possibility of bandgap tailoring and use of selective emitters such as rare earth oxides (erbia holmia yttria) and rare earth?yttrium aluminium garnets. As compared to higher bandgap semiconductors such as CdTe it is easier to dope the lower bandgap semiconductors. TPV cell development can benefit from the more mature PV solar cell and opto?electronic (infrared detectors lasers and optical communications) technologies. Low bandgaps and larger fluences employed in TPV cells result in very high current densities which make it difficult to collect the current effectively. Techniques for laser and mechanical scribing integral interconnection and multi?junction tandem structures which have been fairly well developed for thin?film PV solar cells could be further refined for enhancing the voltages from TPV modules. Thin?film TPV cells may be deposited on metals or back?surface reflectors. Spectral control elements such as indium?tin oxide or tin oxide may be deposited directly on the TPV convertor. It would be possible to reduce the cost of TPV technologies based on single?crystal materials being developed at present to the range of US$ 2–5 per watt so as to be competitive in small to medium size commercial applications. However a further cost reduction to the range of US ¢ 35–$ 1 per watt to reach the more competitive large?scale residential consumer and hybrid?electric car markets would be possible only with the polycrystalline?thin film TPV cells.

Neelkanth G. Dhere

1996-01-01T23:59:59.000Z

117

Contaminants in Used Lubricating Oils and Their Fate during Distillation/Hydrotreatment Re-Refining  

Science Journals Connector (OSTI)

Contaminants in Used Lubricating Oils and Their Fate during Distillation/Hydrotreatment Re-Refining ...

Dennis W. Brinkman; John R. Dickson

1995-01-01T23:59:59.000Z

118

Laser diagnostics of CVD diamond film growth  

SciTech Connect (OSTI)

Diamond has one of hte most exciting combinations of properties known.{sup 1} It is the hardest material known, has extremely high thermal conductivity, wide optical transparency, and a durability that is unmatched by other substances. The scarcity and high cost of natural diamond has precluded its use in many potential applications that would benefit from this unique combination of properties. Over the last two decades, the technique of chemical vapor deposition (CVD) of diamond at low pressure has been developed, providing the technology to produce thin and thick film coatings on a variety of materials as well as freestanding films and plates of diamond. High optical clarity diamond plates grown by the CVD method are now available in diameters that exceed that of the largest natural diamond ever found. Products spanning from diamond coated machine t{sq_bullet}oling to semiconducting diamond-based electronics have been developed using this technology. Recent estimates suggest that the global market for chemical vapor deposited diamond and diamond-like carbon films will reach {dollar_sign}1 billion by 2000.

Feigerle, C.S.; Shaw, R.W.

1996-05-01T23:59:59.000Z

119

FY 2012 Progress Report for Fuel & Lubricant Technologies  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

911 911 Fuels & Lubricant Technologies VEHICLE TECHNOLOGIES OFFICE 2012 annual progress report U.S. Department of Energy 1000 Independence Avenue, S.W. Washington, D.C. 20585-0121 FY 2012 PROGRESS REPORT FOR FUEL & LUBRICANT TECHNOLOGIES Energy Efficiency and Renewable Energy Vehicle Technologies Office Approved by Kevin Stork Team Leader, Fuel & Lubricant Technologies Vehicle Technologies Office June 2013 DOE/EE-0911 Acknowledgement We would like to express our sincere appreciation to Alliance Technical Services, Inc. and Oak Ridge National Laboratory for their technical and artistic contributions in preparing and publishing this report.

120

Generation of diamond wire sliced wafer surface based on the distribution of diamond grits  

Science Journals Connector (OSTI)

Diamond wire sawing is one of the abrasive machining processes. The cutting tool is a tiny steel wire coated with a large number of diamond grits. Although wire saw is widely used for slicing hard and brittle ...

Chunhui Chung; Le Van Nhat

2014-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Manufacture of naphthenic type lubricating oils  

SciTech Connect (OSTI)

A process for making naphthenic type lubricating oils from a low viscosity waxy crude which comprises distilling said low viscosity waxy crude to 500 to 650/sup 0/F. At atmospheric pressure to separate distillable fractions therefrom, subjecting the residue to a vacuum distillation at about 25 to about 125 mm Hg absolute pressure to obtain one or more gas oil fractions, optionally hydrotreating said gas oil fractions in the presence of a Ni/Mo catalyst at 550 to 650/sup 0/F, 0.25 to 1.0 lhsv, and 700-1500 psig, and catalytically dewaxing said distillates in the presence of a H+ form mordenite catalyst containing a group VI or group VIII metal at 550 to 750/sup 0/F, 500 to 1500 psig and 0.25 to 5.0 lhsv, to obtain said naphthenic type oils having pour points of from about -60 to +20/sup 0/F.

Reynolds, R.W.

1981-02-24T23:59:59.000Z

122

Renewable Fuels and Lubricants Laboratory (Fact Sheet)  

SciTech Connect (OSTI)

This fact sheet describes the Renewable Fuels and Lubricants (ReFUEL) Laboratory at the U.S. Department of Energy National Renewable Energy Laboratory (NREL) is a state-of-the-art research and testing facility for advanced fuels and vehicles. Research and development aims to improve vehicle efficiency and overcome barriers to the increased use of renewable diesel and other nonpetroleum-based fuels, such as biodiesel and synthetic diesel derived from biomass. The ReFUEL Laboratory features a chassis dynamometer for vehicle performance and emissions research, two engine dynamometer test cells for advanced fuels research, and precise emissions analysis equipment. As a complement to these capabilities, detailed studies of fuel properties, with a focus on ignition quality, are performed at NREL's Fuel Chemistry Laboratory.

Not Available

2014-08-01T23:59:59.000Z

123

EA-1795: Diamond Green Diesel Facility in Norco, LA | Department...  

Broader source: Energy.gov (indexed) [DOE]

5: Diamond Green Diesel Facility in Norco, LA EA-1795: Diamond Green Diesel Facility in Norco, LA April 1, 2011 EA-1795: Final Environmental Assessment Loan Guarantee to Diamond...

124

Epitaxial growth of europium monoxide on diamond  

SciTech Connect (OSTI)

We report the epitaxial integration of phase-pure EuO on both single-crystal diamond and on epitaxial diamond films grown on silicon utilizing reactive molecular-beam epitaxy. The epitaxial orientation relationship is (001) EuO ? (001) diamond and [110] EuO ?[100] diamond. The EuO layer is nominally unstrained and ferromagnetic with a transition temperature of 68 ± 2 K and a saturation magnetization of 5.5 ± 0.1 Bohr magnetons per europium ion on the single-crystal diamond, and a transition temperature of 67 ± 2 K and a saturation magnetization of 2.1 ± 0.1 Bohr magnetons per europium ion on the epitaxial diamond film.

Melville, A.; Heeg, T. [Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853 (United States)] [Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853 (United States); Mairoser, T.; Schmehl, A. [Zentrum für elektronische Korrelationen und Magnetismus, Universität Augsburg, Universitätsstraße 1, 86159 Augsburg (Germany)] [Zentrum für elektronische Korrelationen und Magnetismus, Universität Augsburg, Universitätsstraße 1, 86159 Augsburg (Germany); Fischer, M.; Gsell, S.; Schreck, M. [Institut für Physik, Universität Augsburg, D-86135 Augsburg (Germany)] [Institut für Physik, Universität Augsburg, D-86135 Augsburg (Germany); Awschalom, D. D. [Institute for Molecular Engineering, University of Chicago, Chicago, Illinois 60637 (United States)] [Institute for Molecular Engineering, University of Chicago, Chicago, Illinois 60637 (United States); Holländer, B.; Schubert, J. [Peter Grünberg Institute, PGI9-IT, JARA-FIT, Research Centre Jülich, D-52425 Jülich (Germany)] [Peter Grünberg Institute, PGI9-IT, JARA-FIT, Research Centre Jülich, D-52425 Jülich (Germany); Schlom, D. G. [Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853 (United States) [Department of Materials Science and Engineering, Cornell University, Ithaca, New York 14853 (United States); Kavli Institute at Cornell for Nanoscale Science, Ithaca, New York 14853 (United States)

2013-11-25T23:59:59.000Z

125

Development and application of a lubricant composition model to study effects of oil transport, vaporization, fuel dilution, and soot contamination on lubricant rheology and engine friction  

E-Print Network [OSTI]

Engine oil lubricants play a critical role in controlling mechanical friction in internal combustion engines by reducing metal-on-metal contact. This implies the importance of understanding lubricant optimization at the ...

Gu, Grace Xiang

2014-01-01T23:59:59.000Z

126

Diamond-silicon carbide composite and method  

DOE Patents [OSTI]

Uniformly dense, diamond-silicon carbide composites having high hardness, high fracture toughness, and high thermal stability are prepared by consolidating a powder mixture of diamond and amorphous silicon. A composite made at 5 GPa/1673K had a measured fracture toughness of 12 MPam.sup.1/2. By contrast, liquid infiltration of silicon into diamond powder at 5 GPa/1673K produces a composite with higher hardness but lower fracture toughness.

Zhao, Yusheng (Los Alamos, NM)

2011-06-14T23:59:59.000Z

127

Diamond turning machine controller implementation  

SciTech Connect (OSTI)

The standard controller for a Pnuemo ASG 2500 Diamond Turning Machine, an Allen Bradley 8200, has been replaced with a custom high-performance design. This controller consists of four major components. Axis position feedback information is provided by a Zygo Axiom 2/20 laser interferometer with 0.1 micro-inch resolution. Hardware interface logic couples the computers digital and analog I/O channels to the diamond turning machine`s analog motor controllers, the laser interferometer, and other machine status and control information. It also provides front panel switches for operator override of the computer controller and implement the emergency stop sequence. The remaining two components, the control computer hardware and software, are discussed in detail below.

Garrard, K.P.; Taylor, L.W.; Knight, B.F.; Fornaro, R.J.

1988-12-01T23:59:59.000Z

128

Ionic Liquids as Multifunctional Ashless Additives for Engine Lubrication  

Broader source: Energy.gov [DOE]

A group of oil-miscible ionic liquids has been developed by an ORNL-GM team as candidate lubricant additives with promising physical/chemical properties and potential multiple functionalities.

129

Choline for neutralizing naphthenic acid in fuel and lubricating oils  

SciTech Connect (OSTI)

A method is described of neutralizing at least a portion of the naphthenic acids present in fuel and lubricating oils which contain naphthenic acids which comprises treating these oils with a neutralizing amount of choline.

Ries, D.G.; Roof, G.L.

1986-07-15T23:59:59.000Z

130

Notes 01. The fundamental assumptions and equations of lubrication theory  

E-Print Network [OSTI]

The fundamental assumption in Lubrication Theory. Derivation of thin film flow equations from Navier-Stokes equations. Importance of fluid inertia effects in thin film flows. Some fluid physical properties...

San Andres, Luis

2009-01-01T23:59:59.000Z

131

Flying Height Drop Due to Air Entrapment in Lubricant  

Science Journals Connector (OSTI)

Recently, it is found experimentally that the flying height of an air bearing slider is influenced by the lubricant on the disk. It is explained as the air molecules ... in air bearing force, and hence, the flying

Wei Hua; Kang Kee Ng; Shengkai Yu; Bo Liu; Vivian Ng

2013-10-01T23:59:59.000Z

132

Influence of boric acid additive size on green lubricant performance  

Science Journals Connector (OSTI)

...towards green manufacturing processes, there...boric acid powder additives with canola oil...change present manufacturing process lines...powder-based lubricant additives As conceptually...of boric acid additive size on green...towards green manufacturing processes, there...

2010-01-01T23:59:59.000Z

133

Diamond turning of thermoplastic polymers  

SciTech Connect (OSTI)

Single point diamond turning studies were made using a series of thermoplastic polymers with different glass transition temperatures. Variations in surface morphology and surface roughness were observed as a function of cutting speed. Lower glass transition temperatures facilitate smoother surface cuts and better surface finish. This can be attributed to the frictional heating that occurs during machining. Because of the very low glass transition temperatures in polymeric compared to inorganic glasses, the precision machining response can be very speed sensitive.

Smith, E.; Scattergood, R.O.

1988-12-01T23:59:59.000Z

134

Photovoltaic Polycrystalline Thin-Film Cell Basics | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Polycrystalline Thin-Film Cell Basics Polycrystalline Thin-Film Cell Basics Photovoltaic Polycrystalline Thin-Film Cell Basics August 20, 2013 - 2:36pm Addthis Polycrystalline thin-film cells are made of many tiny crystalline grains of semiconductor materials. The materials used in these cells have properties that are different from those of silicon. Thin-film cells have many advantages over their thick-film counterparts. For example, they use much less material. The cell's active area is usually only 1 to 10 micrometers thick, whereas thick films typically are 100 to 300 micrometers thick. Also, thin-film cells can usually be manufactured in a large-area process, which can be an automated, continuous production process. Finally, they can be deposited on flexible substrate materials. The term thin film comes from the method used to deposit the film, not from

135

Polycrystalline Thin-Film Research: Cadmium Telluride (Fact Sheet)  

SciTech Connect (OSTI)

This National Center for Photovoltaics sheet describes the capabilities of its polycrystalline thin-film research in the area of cadmium telluride. The scope and core competencies and capabilities are discussed.

Not Available

2013-06-01T23:59:59.000Z

136

Grain-Boundary Physics in Polycrystalline Photovoltaic Materials: Preprint  

SciTech Connect (OSTI)

This paper describes a study of the atomic structure and electronic effects of grain boundaries in polycrystalline photovoltaic materials such as Si, CdTe, CuInSe2, and CuGaSe2.

Yan, Y.; Jiang, C. S.; Wu, X. Z.; Noufi, R.; Wei, S. H.; Al-Jassim, M. M.

2008-05-01T23:59:59.000Z

137

Sandia National Laboratories: Diamond Plates Create Nanostructures...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Not Chemistry More Efficient Fuel Cells under Development by Engineers More California Gas Stations Can Provide Hydrogen than Previously Thought, Sandia Study Says Diamond...

138

Photovoltaic Cell Having A P-Type Polycrystalline Layer With Large Crystals  

DOE Patents [OSTI]

A photovoltaic cell has an n-type polycrystalline layer and a p-type polycrystalline layer adjoining the n-type polycrystalline layer to form a photovoltaic junction. The p-type polycrystalline layer comprises a substantially planar layer portion having relatively large crystals adjoining the n-type polycrystalline layer. The planar layer portion includes oxidized impurities which contribute to obtainment of p-type electrical properties in the planar layer portion.

Albright, Scot P. (Lakewood, CO); Chamberlin, Rhodes R. (El Paso, TX)

1996-03-26T23:59:59.000Z

139

Chapter Five The Classification and Applications of Liquid Lubricants  

Science Journals Connector (OSTI)

Publisher Summary This chapter discusses the classification and applications of liquid lubricants. As a result of technical developments, currently many types of lubricating oils and special fluids exist. The technical needs are expressed in various commercial criteria used for oil classification. The type of equipment, and its component parts, defines the basis of the oil classification; the operating conditions of the lubricated part provide other important criteria needed to define the characteristics required in the oil. The main oil classifications in terms of equipment are into engine oils, turbine oil, steam turbine oils, etc. Oils for various parts of the equipment include bearing oils, transmission oils, hydraulic oils, etc. Another classification system deals with the special requirements of certain industrial sectors. Thus, for example, textile oils, electrical insulating oils, quenching oils and oils for application in radioactive environments are specially manufactured and classified. Two-stroke gasoline engines used for powering four- and two-wheeled road vehicles, small boats, mowers, etc., can be classified in the context of lubrication under two groups: (1) engines with conventional lubrication systems and (2) engines with separate lubrication systems.

1992-01-01T23:59:59.000Z

140

Energy Harvesting Diamond Channel with Energy Cooperation  

E-Print Network [OSTI]

Energy Harvesting Diamond Channel with Energy Cooperation Berk Gurakan Sennur Ulukus Department@umd.edu Abstract--We consider the energy harvesting diamond channel, where the source and two relays harvest energy the option of wirelessly transferring some of its energy to the relays via energy cooperation. We find

Ulukus, Sennur

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

Fracture of synthetic diamond M. D. Droty  

E-Print Network [OSTI]

Fracture of synthetic diamond M. D. Droty Ctystallume, 3506 Bassett Street, Santa Clara, California 1995) The fracture behavior of synthetic diamond has been investigated using indentation methods and by the tensile testing of pre-notched fracture-mechanics type samples. Specifically, the fracture toughness

Ritchie, Robert

142

Diamond as an inert substrate of graphene  

SciTech Connect (OSTI)

Interaction between graphene and semiconducting diamond substrate has been examined with large-scale density functional theory calculations. Clean and hydrogenated diamond (100) and (111) surfaces have been studied. It turns out that weak van der Waals interactions dominate for graphene on all these surfaces. High carrier mobility of graphene is almost not affected, except for a negligible energy gap opening at the Dirac point. No charge transfer between graphene and diamond (100) surfaces is detected, while different charge-transfer complexes are formed between graphene and diamond (111) surfaces, inducing either p-type or n-type doping on graphene. Therefore, diamond can be used as an excellent substrate of graphene, which almost keeps its electronic structures at the same time providing the flexibility of charge doping.

Hu Wei; Li Zhenyu; Yang Jinlong [Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230026 (China)

2013-02-07T23:59:59.000Z

143

Rotary seal with enhanced lubrication and contaminant flushing  

DOE Patents [OSTI]

A resilient, ring shaped interference-type hydrodynamic rotary seal having waves on the lubricant side which provide increased film thickness and flushing action by creating contact pressure induced angulated restrictions formed by abrupt restrictive diverters. The angulated restrictions are defined by projecting ridges, corners at the trailing edge of the waves, or simply by use of a converging shape at the trailing edge of the waves which is more abrupt than the gently converging hydrodynamic inlet shape at the leading edge of the waves. The abrupt restrictive diverter performs two functions; a restricting function and a diverting function. The angulated restrictions cause a local film thickness restriction which produces a damming effect preventing a portion of the lubricant from leaking out of the dynamic sealing interface at the trailing edge of the wave, and results in a much thicker lubricant film thickness under the waves. This contributes to more film thickness in the remainder of the dynamic sealing interface toward the environment because film thickness tends to decay gradually rather than abruptly due to the relative stiffness of the seal material. Because of the angle of the abrupt restrictive diverter relative to the relative rotation direction, in conjunction with the restriction or damming effect, a strong diverting action is produced which pumps lubricant across the dynamic sealing interface toward the environment. The lubricant diversion is caused by the component of the rotational velocity tangent to the abrupt restrictive diverter. The component of rotational velocity normal to the abrupt restrictive diverter causes a portion of the lubricant film to be pumped past the abrupt restrictive diverter, thereby assuring adequate lubrication thereof.

Dietle, Lannie L. (Sugar Land, TX)

2000-01-01T23:59:59.000Z

144

Performance of MOV Stem Lubricants at Elevated Temperatures  

SciTech Connect (OSTI)

This paper documents the results of recent tests sponsored by the U. S. Nuclear Regulatory Commission (NRC) and performed by the Idaho National Engineering and Environmental Laboratory (INEEL). These tests address the effectiveness of the lubricant used on the threaded portion of the valve stem, where the stem nut turns on the stem. Recent testing indicates that an elevated temperature environment can lead to significant increases in the friction coefficient at the stem/stem-nut interface. Most valve actuator qualification tests are performed at room temperature. Similarly, in-service tests are run at ambient plant temperatures, usually 70 to 100°F. Since design conditions can lead to valve operating temperatures in the 200 to 300°F range, it is important to know whether a temperature-induced increase in friction at the stem/stem-nut interface will prevent the required operation of critical valves. Lubricant aging is another phenomenon that might have deleterious effects on the thrust output of a valve actuator. Laboratory experience and field experience both indicate that after long periods in elevated temperature environments, the lubricants may lose their lubrication qualities. The scope of the current test program includes testing of five different lubricants on four different valve stems. Pending completion of the testing, results of the tests conducted using two of the four stems are discussed. The test series included collection of baseline data at room temperature, single step temperature tests where the temperature of the test setup was elevated directly to 250°F, and step testing where the temperature was elevated in steps to 130, 190, and 250°F, then returned to 70°F. All greases tested showed evidence of physical change after elevated temperature tests. Except for one particular lubricant, all of the greases tested showed increased coefficients of friction at elevated temperatures. Numerous other preliminary conclusions are presented. Recommendations for future research in the area of aged valve stem lubricant performance at elevated temperatures are also presented.

DeWall, Kevin George; Nitzel, Michael Everett; Watkins, John Clifford

2001-07-01T23:59:59.000Z

145

Investigating the Effect of Engine Lubricant Viscosity on Engine Friction and Fuel Economy of a Diesel Engine.  

E-Print Network [OSTI]

??Fuel economy is affected, both by fuel and engine lubricant quality. Engine lubricant quality plays a vital role in reduction of fuel consumption by effective… (more)

Singh, Devendra

2011-01-01T23:59:59.000Z

146

In situ control of lubricant properties for reduction of power cylinder friction through thermal barrier coating  

E-Print Network [OSTI]

Lowering lubricant viscosity to reduce friction generally carries a side effect of increased metal-metal contact in mixed or boundary lubrication, for example near top ring reversal along the engine cylinder liner. A ...

Molewyk, Mark Allen

2014-01-01T23:59:59.000Z

147

Reducing Lubricant Ash Impact on Exhaust Aftertreatment with a Oil Conditioning Filter  

Broader source: Energy.gov [DOE]

Under the test conditions used in this study, the strong base filter had a significant and beneficial effect on the rate of oil degradation. The strong base filter reduced lubricant acidity by absorbing acidic contaminants in the lubricant

148

Thickness Change in Molecularly Thin Lubricant Under Flying Head in Hard Disk Drives  

Science Journals Connector (OSTI)

In hard disk drives (HDDs), lubricants on disks are very important material to reduce head and disk wear. Thus, it is necessary to ... thickness to keep lubricant thickness constant on rotating disks. For this pu...

K. Yanagisawa; T. Watanabe; Y. Kawakubo; M. Yoshino

2010-10-01T23:59:59.000Z

149

The Extraction?Flocculation Re-refining Lubricating Oil Process Using Ternary Organic Solvents  

Science Journals Connector (OSTI)

The Extraction?Flocculation Re-refining Lubricating Oil Process Using Ternary Organic Solvents ... Res., 1997, 36 (9), ... Waste lubricating oils may be re-refined with organic solvents that dissolve base oil and segregate the additives and solid particles. ...

J. P. Martins

1997-09-02T23:59:59.000Z

150

Lubricant-Friendly, Superhard and Low-Friction Coatings by Design...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

Lubricant-Friendly, Superhard and Low-Friction Coatings by Design Lubricant-Friendly, Superhard and Low-Friction Coatings by Design Superhard and low-friction coatings and surface...

151

Effects of Fuel Dilution with Biodiesel on Lubricant Acidity, Oxidation and Corrosion  

Broader source: Energy.gov [DOE]

In-cylinder fuel injection to produce rich exhaust for regeneration of lean NOx trap catalyst and diesel particulate filter results in substantial fuel dilution of lubricating oil cause changes of lubricating oil properties and scuffing of engine components.

152

Vehicle Technologies Office: 2012 Fuel and Lubricant Technologies R&D Annual Progress Report  

Broader source: Energy.gov [DOE]

The Fuel & Lubricant Technologies subprogram supports fuels and lubricants research and development (R&D) to provide vehicle users with cost-competitive options that enable high fuel economy with low emissions, and contribute to petroleum displacement.

153

Self-composite comprised of nanocrystalline diamond and a non-diamond component useful for thermoelectric applications  

DOE Patents [OSTI]

One provides nanocrystalline diamond material that comprises a plurality of substantially ordered diamond crystallites that are sized no larger than about 10 nanometers. One then disposes a non-diamond component within the nanocrystalline diamond material. By one approach this non-diamond component comprises an electrical conductor that is formed at the grain boundaries that separate the diamond crystallites from one another. The resultant nanowire is then able to exhibit a desired increase with respect to its ability to conduct electricity while also preserving the thermal conductivity behavior of the nanocrystalline diamond material.

Gruen, Dieter M.

2012-09-04T23:59:59.000Z

154

Self-composite comprised of nanocrystalline diamond and a non-diamond component useful for thermoelectric applications  

DOE Patents [OSTI]

One provides nanocrystalline diamond material that comprises a plurality of substantially ordered diamond crystallites that are sized no larger than about 10 nanometers. One then disposes a non-diamond component within the nanocrystalline diamond material. By one approach this non-diamond component comprises an electrical conductor that is formed at the grain boundaries that separate the diamond crystallites from one another. The resultant nanowire is then able to exhibit a desired increase with respect to its ability to conduct electricity while also preserving the thermal conductivity behavior of the nanocrystalline diamond material.

Gruen, Dieter M. (Downers Grove, IL)

2009-08-11T23:59:59.000Z

155

Lasing modes in polycrystalline and amorphous photonic structures  

SciTech Connect (OSTI)

We systematically studied the lasing characteristics in photonic polycrystalline and amorphous structures. 2D arrays of air holes were fabricated in a GaAs membrane. InAs quantum dots embedded in the membrane provide gain for lasing under optical pumping. The lasing modes are spatially localized, and blue shift as the structural order becomes short ranged. Our three-dimensional numerical simulations reveal that the out-of-plane leakage of the lasing mode dominates over the in-plane leakage. The lasing modes in a photonic polycrystalline move away from the center frequency of the photonic band gap to reduce the out-of-plane leakage. In a photonic amorphous structure, the short-range order improves optical confinement and enhances the quality factor of resonances. Understanding the behavior of photonic polycrystalline laser and amorphous laser opens the possibility of controlling lasing characteristic by varying the degree of structural order.

Yang, Jin-Kyu [Department of Applied Physics, Yale University, New Haven, Connecticut 06520 (United States); Department of Optical Engineering, Kongju National University, Kongju 314-701 (Korea, Republic of); Noh, Heeso; Liew, Seng Fatt; Rooks, Michael J. [Department of Applied Physics, Yale University, New Haven, Connecticut 06520 (United States); Solomon, Glenn S. [Joint Quantum Institute, NIST and University of Maryland, Gaithersburg, Maryland 20899 (United States); Cao Hui [Department of Applied Physics, Yale University, New Haven, Connecticut 06520 (United States); Department of Physics, Yale University, New Haven, Connecticut 06520 (United States)

2011-09-15T23:59:59.000Z

156

Properties of carbon overcoats and perfluoro-polyether lubricants in hard disk drives  

E-Print Network [OSTI]

interactions of perfluoropolyether lubricants with magnetichydroxyl-terminated perfluoropolyether liquid films on theand R.L. Siemens, "Perfluoropolyether characterization by

Brunner, Ralf

2009-01-01T23:59:59.000Z

157

11 - Environmental life-cycle assessment (LCA) of lubricants  

Science Journals Connector (OSTI)

Abstract: Lubricants impact on the environment from raw material extraction to manufacturing, usage and disposal or reuse. Life-cycle assessment (LCA) is utilised for evaluation of the environmental impacts of energy and material flows throughout the product life. Several comprehensive \\{LCAs\\} have compared mineral oil-based and bio-based lubricants, reporting varying conclusions. Environmental savings of biolubricants are more apparent at a local level than at a global scale. Negative impacts mainly stem from their agricultural production and performance in the use phase. \\{LCAs\\} should be used in industrial product design of biolubricants. Sustainable development indicators also consider the socio-economic impact of a product. Optimised lubricants determine significant energy savings.

Jan C.J. Bart; Emanuele Gucciardi; Stefano Cavallaro

2013-01-01T23:59:59.000Z

158

Investigation of silver electrodeposition on polycrystalline platinum by iodine chemisorption  

E-Print Network [OSTI]

Qb)ja'A (12) Silver electrodeposition onto the I-pretreated polycrystalline Pt electrode was done using 2 mM AgC104 in 1 M H2SO4. Under these conditions, Ag deposition consists of two underpotential deposition peaks at 0. 65 and 0. 50 V (peaks 1...INVESTIGATION OF SILVER ELECIRODEPOSITION ON POLYCRYSTALLINE PLATINUM BY IODINE CHEMISORPTION A Thesis by JOHN EUGENE HARRIS Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements...

Harris, John Eugene

1988-01-01T23:59:59.000Z

159

Adhesion, Lubrication, and Wear on the Atomic Scale James B. Adams  

E-Print Network [OSTI]

Adhesion, Lubrication, and Wear on the Atomic Scale James B. Adams Dept. of Chemical and Materials, lubrication and wear) of tribology on the atomic Scale with a focus on our group's work on Aluminum. Adhesion to control friction and wear in bulk metal processes, lubricant boundary additives are added to bind

Adams, James B

160

ME 379M Lubrication, Wear, and Bearing Technology ABET EC2000 syllabus  

E-Print Network [OSTI]

ME 379M � Lubrication, Wear, and Bearing Technology Page 1 ABET EC2000 syllabus ME 379M � Lubrication, Wear, and Bearing Technology Spring 2010 Required or Elective: Elective 2008-2010 Catalog Data: Topics may vary: Lubrication, Wear, and Bearing Technology Prerequisite(s): Admission to the Major

Ben-Yakar, Adela

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

EFFECT OF MECHANICAL DISCONTINUITIES ON THE STRENGTH OF POLYCRYSTALLINE ALUMINUM OXIDE  

E-Print Network [OSTI]

THE STRENGTH OF POLYCRYSTALLINE ALUMINUM OXIDE S. Wallace ofThe variables and number of aluminum oxide (almnina). size~

Wallace, J.S.

2011-01-01T23:59:59.000Z

162

Diamond switches for high temperature electronics  

SciTech Connect (OSTI)

Diamond switches are well suited for use in high temperature electronics. Laboratory feasibility of diamond switching at 1 kV and 18 A was demonstrated. DC blocking voltages up to 1 kV were demonstrated. A 50 {Omega} load line was switched using a diamond switch, with switch on-state resistivity {approx}7 {Omega}-cm. An electron beam, {approx}150 keV energy, {approx}2 {mu}s full width at half maximum was used to control the 5 mm x 5 mm x 100 {mu}m thick diamond switch. The conduction current temporal history mimics that of the electron beam. These data were taken at room temperature.

Prasad, R.R.; Rondeau, G.; Qi, Niansheng [Alameda Applied Sciences Corp., San Leandro, CA (United States)] [and others

1996-04-25T23:59:59.000Z

163

Electronic Impact of Inclusions in Diamond  

SciTech Connect (OSTI)

X-ray topography data are compared with photodiode responsivity maps to identify potential candidates for electron trapping in high purity, single crystal diamond. X-ray topography data reveal the defects that exist in the diamond material, which are dominated by non-electrically active linear dislocations. However, many diamonds also contain defects configurations (groups of threading dislocations originating from a secondary phase region or inclusion) in the bulk of the wafer which map well to regions of photoconductive gain, indicating that these inclusions are a source of electron trapping which affect the performance of diamond X-ray detectors. It was determined that photoconductive gain is only possible with the combination of an injecting contact and charge trapping in the near surface region. Typical photoconductive gain regions are 0.2 mm across; away from these near-surface inclusions the device yields the expected diode responsivity.

Muller, E.M.; Smedley, J.; Raghothamachar, B.; Gaowei, M.; Keister, J.W.; Ben-Zvi, I.; Dudley, M.; Wu, Q.

2010-04-07T23:59:59.000Z

164

Effective placement of detectors at diamond interchanges  

E-Print Network [OSTI]

Most signalized interchanges in Texas are tight urban diamond interchanges of freeways having one-way frontage roads. At these interchanges, traffic actuated control with improper location of detectors may result in inefficient traffic operations...

Prabhakar, Dayakar

1994-01-01T23:59:59.000Z

165

Diamond film growth argon-carbon plasmas  

DOE Patents [OSTI]

A method and system are disclosed for manufacturing diamond film. The method involves forming a carbonaceous vapor, providing a gas stream of argon, hydrogen and hydrocarbon and combining the gas with the carbonaceous vapor, passing the combined carbonaceous vapor and gas carrier stream into a chamber, forming a plasma in the chamber causing fragmentation of the carbonaceous and deposition of a diamond film on a substrate. 29 figs.

Gruen, D.M.; Krauss, A.R.; Liu, S.Z.; Pan, X.Z.; Zuiker, C.D.

1998-12-15T23:59:59.000Z

166

Diamond film growth from fullerene precursors  

DOE Patents [OSTI]

A method and system are disclosed for manufacturing diamond film. The method involves forming a fullerene vapor, providing a noble gas stream and combining the gas with the fullerene vapor, passing the combined fullerene vapor and noble gas carrier stream into a chamber, forming a plasma in the chamber causing fragmentation of the fullerene and deposition of a diamond film on a substrate. 10 figs.

Gruen, D.M.; Liu, S.; Krauss, A.R.; Pan, X.

1997-04-15T23:59:59.000Z

167

Modelling of the ultrasonic propagation in polycrystalline materials  

E-Print Network [OSTI]

. Jenson Commissariat `a l'´energie atomique, Centre de Saclay - PC120, 91191 Gif-Sur-Yvette, France lili designing new NDE methods. Modeling work has been underway at CEA-LIST in the software CIVA to describe such as a polycrystalline material. The objective is to develop new simulation tools based on metallurgical data input

Boyer, Edmond

168

Diesel engine lubrication with poor quality residual fuel  

SciTech Connect (OSTI)

The quality of marine residual fuel is declining. This is being caused by a gradual trend towards production of heavier crudes and increased residuum conversion processes in refineries to meet light product demand while holding down crude runs. Additionally, more stringent inland fuel sulfur regulations have caused the higher sulfur residues to be used for marine residual fuel blending. Engine manufacturers are making major efforts in design so that their engines can burn these fuels at high efficiency with minimum adverse effects. The oil industry is developing improved lubricants to reduce as much as possible the increased wear and deposit formation caused by these poor quality fuels. To guide the development of improved lubricants, knowledge is required about the impact of the main fuel characteristics on lubrication. This paper summarizes work conducted to assess the impact of fuel sulfur, Conradson carbon and asphaltenes on wear and deposit formation in engines representative of full scale crosshead diesel engines and medium speed trunk piston engines. Results obtained with improved lubricants in these engines are reviewed.

Van der Horst, G.W.; Hold, G.E.

1983-01-01T23:59:59.000Z

169

Honeywell's high-performance lubricants boost PVC extrusion  

Science Journals Connector (OSTI)

At the recent International PVC Conference, held in Brighton, UK, Honeywell Specialty Materials presented new test results demonstrating the advantages offered to polyvinyl chloride (PVC) producers by its newest high-performance lubricants (HPLs). According to the company, the products make the extrusion process more efficient, helping producers ‘meet critical industry challenges’.

2008-01-01T23:59:59.000Z

170

Diamond and Related Materials 8 (1999) 13881392 www.elsevier.com/locate/diamond  

E-Print Network [OSTI]

of the hot-filament diamond CVD gas-phase environment: direct comparison with experimental measurements R diamond reactor. These simulations have been compared to data measured using an in-situ molecular beam atoms, was found to be very important since it controlled the whole gas-phase chemistry. Comparison

Bristol, University of

171

Plasma spraying method for forming diamond and diamond-like coatings  

DOE Patents [OSTI]

A method and composition for the deposition of a thick layer (10) of diamond or diamond-like material. The method includes high temperature processing wherein a selected composition (12) including at least glassy carbon is heated in a direct current plasma arc device to a selected temperature above the softening point, in an inert atmosphere, and is propelled to quickly quenched on a selected substrate (20). The softened or molten composition (18) crystallizes on the substrate (20) to form a thick deposition layer (10) comprising at least a diamond or diamond-like material. The selected composition (12) includes at least glassy carbon as a primary constituent (14) and may include at least one secondary constituent (16). Preferably, the secondary constituents (16) are selected from the group consisting of at least diamond powder, boron carbide (B.sub.4 C) powder and mixtures thereof.

Holcombe, Cressie E. (Farragut, TN); Seals, Roland D. (Oak Ridge, TN); Price, R. Eugene (Knoxville, TN)

1997-01-01T23:59:59.000Z

172

Plasma spraying method for forming diamond and diamond-like coatings  

DOE Patents [OSTI]

A method and composition is disclosed for the deposition of a thick layer of diamond or diamond-like material. The method includes high temperature processing wherein a selected composition including at least glassy carbon is heated in a direct current plasma arc device to a selected temperature above the softening point, in an inert atmosphere, and is propelled to quickly quenched on a selected substrate. The softened or molten composition crystallizes on the substrate to form a thick deposition layer comprising at least a diamond or diamond-like material. The selected composition includes at least glassy carbon as a primary constituent and may include at least one secondary constituent. Preferably, the secondary constituents are selected from the group consisting of at least diamond powder, boron carbide (B{sub 4}C) powder and mixtures thereof. 9 figs.

Holcombe, C.E.; Seals, R.D.; Price, R.E.

1997-06-03T23:59:59.000Z

173

Development of a method for predicting the performance and wear of PDC (polycrystalline diamond compact) drill bits  

SciTech Connect (OSTI)

A method is developed for predicting cutter forces, temperatures, and wear on PDC bits as well as integrated bit performance parameters such as weight-on-bit, drilling torque, and bit imbalance. A computer code called PDCWEAR has been developed to make this method available as a tool for general bit design and analysis. The method uses single-cutter data to provide a measure of rock drillability and employs theoretical considerations to account for interaction among closely spaced cutters on the bit. Experimental data are presented to establish the effects of cutter size and wearflat area on the forces that develop during rock cutting. Waterjet assistance is shown to significantly reduce cutting forces, thereby potentially extending bit life and reducing weight-on-bit and torque requirements in hard rock. The effects of several other design and operating parameters on bit life and drilling performance are also investigated.

Glowka, D.A.

1987-09-01T23:59:59.000Z

174

Use of Textured Surfaces to Mitigate Sliding Friction and Wear of Lubricated and Non-Lubricated Contacts  

SciTech Connect (OSTI)

If properly employed, the placement of three-dimensional feature patterns, also referred to as textures, on relatively-moving, load-bearing surfaces can be beneficial to their friction and wear characteristics. For example, geometric patterns can function as lubricant supply channels or depressions in which to trap debris. They can also alter lubricant flow in a manner that produces thicker load-bearing films locally. Considering the area occupied by solid areas and spaces, textures also change the load distribution on surfaces. At least ten different attributes of textures can be specified, and their combinations offer wide latitude in surface engineering. By employing directional machining and grinding procedures, texturing has been used on bearings and seals for well over a half century, and the size scales of texturing vary widely. This report summarizes past work on the texturing of load-bearing surfaces, including past research on laser surface dimpling of ceramics done at ORNL. Textured surfaces generally show most pronounced effects when they are used in conformal or nearly conformal contacts, like that in face seals. Combining textures with other forms of surface modification and lubrication methods can offer additional benefits in surface engineering for tribology. As the literature and past work at ORNL shows, texturing does not always provide benefits. Rather, the selected pattern and arrangement of features must be matched to characteristics of the proposed application, bearing materials, and lubricants.

Blau, Peter Julian [ORNL

2012-03-01T23:59:59.000Z

175

Argonne licenses diamond semiconductor discoveries to AKHAN Technologies |  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

licenses diamond semiconductor discoveries to AKHAN Technologies licenses diamond semiconductor discoveries to AKHAN Technologies By Joseph Bernstein * By Jared Sagoff * March 4, 2013 Tweet EmailPrint LEMONT, Ill. - The U.S. Department of Energy's Argonne National Laboratory announced today that the laboratory has granted AKHAN Technologies exclusive diamond semiconductor application licensing rights to breakthrough low-temperature diamond deposition technology developed by Argonne's Center for Nanoscale Materials (CNM). The Argonne-developed technology allows for the deposition of nanocrystalline diamond on a variety of wafer substrate materials at temperatures as low as 400 degrees Celsius. The combination of the Argonne's low-temperature diamond technology with AKHAN's Miraj Diamond(tm) process represents the state of the art in diamond semiconductor

176

Sparkling Diamonds – Reducing High Energy in the Frozen North  

E-Print Network [OSTI]

De Beers, the undisputed world leader in diamond mining, in a typically proactive approach, completed an energy review at the Snap Lake Diamond Mine in the Northwest Territories. What makes the approach unique is that the mine is still under...

Feldman, J.

2007-01-01T23:59:59.000Z

177

Laser annealing of neutron irradiated boron-10 isotope doped diamond  

Science Journals Connector (OSTI)

10B isotope doped p-type diamond epilayer grown by chemical vapor deposition on (110) oriented type IIa diamond single crystal substrate was subjected to neutron transmutation at a fluence of 2.4...

K. Jagannadham; M. J. Lance; J. E. Butler

2011-04-01T23:59:59.000Z

178

Study of Electron Transport and Amplification in Diamond  

SciTech Connect (OSTI)

As a successful completion of this award, my group has demonstrated world-leading electron gain from diamond for use in a diamond-amplified photocathode. Also, using high-resolution photoemission measurements we were able to uncover exciting new physics of the electron emission mechanisms from hydrogen terminated diamond. Our work, through the continued support of HEP, has resulted in a greater understanding of the diamond material science, including current limits, charge transport modeling, and spatial uniformity.

Muller, Erik M.; Ben-Zvi, Ilan

2013-03-31T23:59:59.000Z

179

Compton profile study of polycrystalline ZnBr{sub 2}  

SciTech Connect (OSTI)

The first ever Compton profile study of polycrystalline ZnBr{sub 2} is presented in this paper. The measurement of polycrystalline sample of ZnBr{sub 2} is performed using 59.54 keV gamma-rays emanating from an {sup 241}Am radioisotope. Theoretical calculations are performed following the Ionic model calculations for a number of configurations Zn{sup +x}Br{sub 2}{sup -x/2}(0.0{<=}x{<=}2.0 in step of 0.5) utilizing free atom profiles. The ionic model suggest transfer of 2.0 electrons from 4 s state of Zn to 4 p state of two Br atoms. The autocorrelation function B(z) is also derived from experiment and the most favoured ionic valence Compton profiles.

Dhaka, M. S. [Department of Physics, Engineering College Bikaner, Bikaner, 334004, Rajasthan (India); Sharma, G. [Department of Physics, Bansthali University, Bansthali, 304022, Rajasthan (India); Mishra, M. C.; Kothari, R. K.; Sharma, B. K. [Department of Physics, University of Rajasthan, Jaipur, 302004, Rajasthan (India)

2010-12-01T23:59:59.000Z

180

Diamond Energy Pty Ltd | Open Energy Information  

Open Energy Info (EERE)

Diamond Energy Pty Ltd Diamond Energy Pty Ltd Jump to: navigation, search Name Diamond Energy Pty Ltd Place Melbourne, Australia Zip 3124 Product Victoria based clean energy project developer. Coordinates -37.817532°, 144.967148° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":-37.817532,"lon":144.967148,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Materials - Coatings & Lubricants - Illinois Center for Advanced Tribology  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Illinois Center for Advanced Tribology Illinois Center for Advanced Tribology ICAT brochure cover TRI - BOL*O*GY (N) -- the science and technology of friction, wear, and lubrication of interacting surfaces in relative motion. The Illinois Center for Advanced Tribology (ICAT) is a virtual center that brings together the skills and talents of multiple investigators and unique facilities from Argonne National Laboratory and three partnering universities to resolve critical friction, wear, and lubrication issues in biomedical implants, alternative energy technologies, and extreme environments. The Center's tribology experts work closely with industry, and with state and federal agencies through jointly funded research projects, to perform leading-edge research on the impact of materials, coatings, and fluids on

182

Gas film lubrication equations for very small clearances  

SciTech Connect (OSTI)

In the hard disk magnetic recording technology, the slider carrying the magnetic elements is supported above the magnetic disk by a self-acting air bearing, which produces the load support. A lubricating film must support a required load with suitably small frictional energy losses and without introducing undesirable instabilities. Under submicron clearance conditions, gas film flow can not be described with continuum models since the molecular mean free path is not negligible compared with the clearance. Accurate results for the load-carrying capacity of gas films for arbitrary Knudsen number are very important since they strongly influence the design of the flying head slider and, consequently, the performance of the magnetic disk storage unit. Here we generalize the previous lubrication equations for arbitrary Knudsen number, accommodation coefficient and a small inclination of the slider relative to the magnetic disk surface.

Sobehart, J.R. [Los Alamos National Lab., NM (United States); Reyna, L.G. [International Business Machines Corp., Yorktown Heights, NY (United States). Thomas J. Watson Research Center

1994-05-01T23:59:59.000Z

183

Accepted to Diamond and Related Materials A kinetic model of diamond nucleation and silicon carbide interlayer formation during  

E-Print Network [OSTI]

Accepted to Diamond and Related Materials A kinetic model of diamond nucleation and silicon carbide Engineering, Colorado State University, Fort Collins, CO, USA Abstract The presence of thin silicon carbide diffusion of carbon atoms into the silicon carbide layer, and the morphology and orientation of the diamond

Dandy, David

184

Hydrogen-doped cubic diamond and the crystal structure of n-diamond Bin Wen a,b,  

E-Print Network [OSTI]

Hydrogen-doped cubic diamond and the crystal structure of n-diamond Bin Wen a,b, , Roderick Melnik. In particular, hydrogen concen- tration dependent elastic constants and lattice parameters for the H-doped diamond have been analyzed. Our results indicate that when the hydrogen concentration is less than 19 at

Melnik, Roderick

185

10 - Friction and lubrication in diesel engine system design  

Science Journals Connector (OSTI)

Abstract: This chapter addresses engine friction and lubrication dynamics modeling in diesel engine system design. It starts by introducing important fundamental principles of engine tribology and builds up a three-level system modeling approach of engine friction. The chapter summarizes the friction characteristics and friction-reduction design measures for both the overall engine system and individual subsystems such as the piston assembly, the piston rings, the bearings, and the valvetrain.

Qianfan Xin

2013-01-01T23:59:59.000Z

186

A novel system to study wear, friction, and lubricants  

SciTech Connect (OSTI)

A novel enclosed (pressurized) multispecimen wear testing system was design and built to allow the fully computerized on-line measurement and control of friction, wear, and lubricants of different materials (metals, ceramics, composites, and plastics). This system is described in detail. The tribological parameters can be adjusted and controlled to reproduce the actual conditions that prevail in machine components. Several examples of the capabilities of the system are presented.

Maamouri, M.; Masson, J.F.; Marchand, N.J. (Ecole Polytechnique, Montreal, Quebec (Canada). Dept. de Metallurgie et de Genie des Materiaux)

1994-08-01T23:59:59.000Z

187

Method of improving field emission characteristics of diamond thin films  

DOE Patents [OSTI]

A method of preparing diamond thin films with improved field emission properties. The method includes preparing a diamond thin film on a substrate, such as Mo, W, Si and Ni. An atmosphere of hydrogen (molecular or atomic) can be provided above the already deposited film to form absorbed hydrogen to reduce the work function and enhance field emission properties of the diamond film. In addition, hydrogen can be absorbed on intergranular surfaces to enhance electrical conductivity of the diamond film. The treated diamond film can be part of a microtip array in a flat panel display.

Krauss, Alan R. (Naperville, IL); Gruen, Dieter M. (Downer Grove, IL)

1999-01-01T23:59:59.000Z

188

Method of improving field emission characteristics of diamond thin films  

DOE Patents [OSTI]

A method of preparing diamond thin films with improved field emission properties is disclosed. The method includes preparing a diamond thin film on a substrate, such as Mo, W, Si and Ni. An atmosphere of hydrogen (molecular or atomic) can be provided above the already deposited film to form absorbed hydrogen to reduce the work function and enhance field emission properties of the diamond film. In addition, hydrogen can be absorbed on intergranular surfaces to enhance electrical conductivity of the diamond film. The treated diamond film can be part of a microtip array in a flat panel display. 3 figs.

Krauss, A.R.; Gruen, D.M.

1999-05-11T23:59:59.000Z

189

E-Print Network 3.0 - alkane lubrication films Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

that is mostly applicable... in tribology, the science of friction, lubrication, and wear within sliding and contacting interfaces. He uses... between sliding surfaces in...

190

E-Print Network 3.0 - actively lubricated bearings Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary: to operation of bearings and splines include wear, fatigue, lubrication, and heat dissipation. Mechanical... shafts that are lined along the length of the engine. Both...

191

Tribological Behaviors of Self-lubricating Coating Prepared by Electrospark Deposition  

Science Journals Connector (OSTI)

...Cu/h-BN self-lubricating coating was prepared on AISI1045 steel by electrospark deposition. The friction coefficient and wear rates were...

Tongkun Cao; Zhijian Xiao

2014-11-01T23:59:59.000Z

192

Investigation into the Interactions between thermal management, lubrication and control systems of a diesel engine.  

E-Print Network [OSTI]

??Engine thermal and lubricant systems have only recently been a serious focus in engine design and in general remain under passive control. The introduction of… (more)

Burke, Richard D

2011-01-01T23:59:59.000Z

193

Solid/liquid lubrication of ceramics at elevated temperatures  

SciTech Connect (OSTI)

This study investigates the effect of solid and liquid lubrication on friction and wear performance of silicon nitride (Si{sub 3}N{sub 4}) and cast iron. The solid lubricant was a thin silver film ({approx}2 {mu}m thick) produced on Si{sub 3}N{sub 4} by ion-beam-assisted deposition. A high-temperature polyol-ester-base synthetic oil served as the liquid lubricant. Friction and wear tests were performed with pin-on-disk and oscillating-slider wear test machines at temperatures up to 300{degrees}C. Without the silver films, the friction coefficients of Si{sub 3}N{sub 4}/Si{sub 3}N{sub 4} test pairs were 0.05 to 0.14, and the average wear rates of Si{sub 3}N{sub 4} pins were {approx}5 x 10{sup -8} mm{sup 3} N{sup -1}. The friction coefficients of Si{sub 3}N{sub 4}/cast iron test pairs ranged from 0.08 to 0.11, depending on test temperature. The average specific wear rates of cast iron pins were {approx}3 x 10{sup -7} mm{sup 3} N{sup -1} m{sup -1}. However, simultaneous use of the solid-lubricant silver and synthetic oil on the sliding surfaces reduced friction coefficients to 0.02 to 0.08. Moreover, the wear of Si{sub 3}N{sub 4} pins and silver-coated Si{sub 3}N{sub 4} disks was so low that it was difficult to assess by a surface profilometer. The wear rates of cast iron pins were {approx}7 x 10{sup -9} mm{sup 3} N{sup -1} m{sup -1} up to 250{degrees}C, but showed a tendency to increase slightly at much higher temperatures. In general, the test results demonstrated that the solid/liquid lubrication of ceramic and/or metallic components is both feasible and effective in controlling friction and wear.

Erdemir, A.; Erck, R.A.; Fenske, G.R. [Argonne National Lab., IL (United States); Hong, H. [Lubrizol Corp., Wickliffe, OH (United States)

1996-04-01T23:59:59.000Z

194

Diamond and diamond-like carbon films for advanced electronic applications  

SciTech Connect (OSTI)

Aim of this laboratory-directed research and development (LDRD) project was to develop diamond and/or diamond-like carbon (DLC) films for electronic applications. Quality of diamond and DLC films grown by chemical vapor deposition (CVD) is not adequate for electronic applications. Nucleation of diamond grains during growth typically results in coarse films that must be very thick in order to be physically continuous. DLC films grown by CVD are heavily hydrogenated and are stable to temperatures {le} 400{degrees}C. However, diamond and DLC`s exceptional electronic properties make them candidates for integration into a variety of microelectronic structures. This work studied new techniques for the growth of both materials. Template layers have been developed for the growth of CVD diamond films resulting in a significantly higher nucleation density on unscratched or unprepared Si surfaces. Hydrogen-free DLC with temperature stability {le} 800{degrees}C has been developed using energetic growth methods such as high-energy pulsed-laser deposition. Applications with the largest system impact include electron-emitting materials for flat-panel displays, dielectrics for interconnects, diffusion barriers, encapsulants, and nonvolatile memories, and tribological coatings that reduce wear and friction in integrated micro-electro-mechanical devices.

Siegal, M.P.; Friedmann, T.A.; Sullivan, J.P. [and others

1996-03-01T23:59:59.000Z

195

Diamond-free Families Jerrold R. Griggs  

E-Print Network [OSTI]

of times a random full chain meets a P-free family, called the Lubell function, and use it for P = Dk, the Lubell function of a family, which gives the average number of times a random full chain meets the family. The Lubell function yields an upper bound on the size of a family. For diamond-free families, we observe

Griggs, Jerrold R.

196

Diamond Beamline I16 (Materials and Magnetism)  

SciTech Connect (OSTI)

We describe the key features and performance specifications of a facility for high-resolution single-crystal x-ray diffraction at Diamond Light Source. The scientific emphasis of the beamline is materials- and x-ray-physics, including resonant and magnetic scattering. We highlight some of the more novel aspects of the beamline design.

Collins, S. P.; Bombardi, A.; Marshall, A. R.; Williams, J. H.; Barlow, G.; Day, A. G.; Pearson, M. R.; Woolliscroft, R. J.; Walton, R. D.; Beutier, G.; Nisbet, G. [Diamond Light Source Ltd, Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE (United Kingdom)

2010-06-23T23:59:59.000Z

197

E-Print Network 3.0 - agins polycrystalline films Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

to predict the microstructure of polycrystalline films as a function of their processing conditions. s Our... goal is to develop a novel KLMC model which is capable of...

198

A phenomenological multi-axial constitutive law for switching in polycrystalline ferroelectric ceramics  

E-Print Network [OSTI]

A phenomenological multi-axial constitutive law for switching in polycrystalline ferroelectric; accepted 30 January 2002 Abstract A phenomenological constitutive law for ferroelectric switching due

199

Fabrication of polycrystalline thin films by pulsed laser processing  

DOE Patents [OSTI]

A method is disclosed for fabricating polycrystalline thin films on low-temperature (or high-temperature) substrates which uses processing temperatures that are low enough to avoid damage to the substrate, and then transiently heating select layers of the thin films with at least one pulse of a laser or other homogenized beam source. The pulse length is selected so that the layers of interest are transiently heated to a temperature which allows recrystallization and/or dopant activation while maintaining the substrate at a temperature which is sufficiently low to avoid damage to the substrate. This method is particularly applicable in the fabrication of solar cells. 1 fig.

Mitlitsky, F.; Truher, J.B.; Kaschmitter, J.L.; Colella, N.J.

1998-02-03T23:59:59.000Z

200

Fabrication of polycrystalline thin films by pulsed laser processing  

DOE Patents [OSTI]

A method for fabricating polycrystalline thin films on low-temperature (or high-temperature) substrates which uses processing temperatures that are low enough to avoid damage to the substrate, and then transiently heating select layers of the thin films with at least one pulse of a laser or other homogenized beam source. The pulse length is selected so that the layers of interest are transiently heated to a temperature which allows recrystallization and/or dopant activation while maintaining the substrate at a temperature which is sufficiently low to avoid damage to the substrate. This method is particularly applicable in the fabrication of solar cells.

Mitlitsky, Fred (Livermore, CA); Truher, Joel B. (San Rafael, CA); Kaschmitter, James L. (Pleasanton, CA); Colella, Nicholas J. (Livermore, CA)

1998-02-03T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Reactive sticking coefficients for silane and disilane on polycrystalline silicon  

SciTech Connect (OSTI)

Reactive sticking coefficients (RSCs) were measured for silane and disilane on polycrystalline silicon for a wide range of temperature and flux (pressure) conditions. The data were obtained from deposition-rate measurements using molecular beam scattering and a very low-pressure cold-wall reactor. The RSCs have nonlinear Arrhenius temperature dependencies and decrease with increasing flux at low (710 /sup 0/C) temperatures. Several simple models are proposed to explain these observations. The results are compared with previous studies of the SiH/sub 4//Si(s) reaction and low-pressure chemical vapor deposition-rate measurements.

Buss, R.J.; Ho, P.; Breiland, W.G.; Coltrin, M.E.

1988-04-15T23:59:59.000Z

202

Resonance Widths in Polycrystalline Nickel-Cobalt Ferrites  

Science Journals Connector (OSTI)

The width of the ferromagnetic resonance has been measured at 10 000 Mc/sec in polycrystalline mixed ferrites of the composition Co?Ni1-?Fe2O4, with ? between 0 and 0.04. The minimum line width is found for ?=0.025 at 20°C. This, as well as the variation of line width with temperature, can be understood on the basis of known single crystal properties and the following assumptions: (a) line width is a linear function of |K|; (b) crystal anisotropy is an additive atomic property.

M. H. Sirvetz and J. H. Saunders

1956-04-15T23:59:59.000Z

203

Low temperature production of large-grain polycrystalline semiconductors  

DOE Patents [OSTI]

An oxide or nitride layer is provided on an amorphous semiconductor layer prior to performing metal-induced crystallization of the semiconductor layer. The oxide or nitride layer facilitates conversion of the amorphous material into large grain polycrystalline material. Hence, a native silicon dioxide layer provided on hydrogenated amorphous silicon (a-Si:H), followed by deposited Al permits induced crystallization at temperatures far below the solid phase crystallization temperature of a-Si. Solar cells and thin film transistors can be prepared using this method.

Naseem, Hameed A. (Fayetteville, AR); Albarghouti, Marwan (Loudonville, NY)

2007-04-10T23:59:59.000Z

204

Physical and Chemical Impact of Sulphuric Acid on Cylinder Lubrication for Large 2-Stroke Marine Diesel Engines  

Science Journals Connector (OSTI)

The influence of sulphuric acid, H2SO4..., on the physical and chemical behaviour of marine Diesel engine lubricant base oils was investigated. To understand...2SO4 with the lubricant film, the saturated hydrocar...

Falko A. Sautermeister; Martin Priest

2012-08-01T23:59:59.000Z

205

Lubricant oil consumption effects on diesel exhaust ash emissions using a sulfur dioxide trace technique and thermogravimetry  

E-Print Network [OSTI]

A detailed experimental study was conducted targeting lubricant consumption effects on ,diesel exhaust ash levels using a model year 2002 5.9L diesel engine, high and low Sulfur commercial lubricants, and clean diesel ...

Plumley, Michael J

2005-01-01T23:59:59.000Z

206

Wear 260 (2006) 12951304 On the friction and wear performance of boric acid lubricant  

E-Print Network [OSTI]

Wear 260 (2006) 1295­1304 On the friction and wear performance of boric acid lubricant combinations a Department of Mechanical Engineering, University of Pittsburgh, 323 Benedum hall, Pittsburgh, PA 15261, USA b Abstract Lubrication is critical for minimizing wear in mechanical systems that operate for extended time

Sawyer, Wallace

207

Department of Industrial Engineering Spring 2013 Lubricant Performance in the Machining of Austempered Ductile Iron  

E-Print Network [OSTI]

analysis for tool wear and surface finish using Excel charts, and Minitab Box-Cox Transformations were done for machining ADI where minimum flank wear for tool inserts is the primary concern The type of lubrication does average values of surface roughness than the dry run, but the differences between the three lubricants

Demirel, Melik C.

208

Spring-supported thrust bearings used in hydroelectric generators: Limit ofhydrodynamic lubrication  

Science Journals Connector (OSTI)

The fluid film breakdown in large spring-supported thrust bearings was examined experimentally for low rotor speeds. Under these conditions, the lubrication was hydrodynamic rather than thermohydrodynamic and thus, the limit of hydrodynamic lubrication was sought. A thrust bearing test facility was used to test three bearings with various loads, speeds, and lubricant viscosities. Power loss and oil temperatures were measured and, using elementary theory, these measured quantities were linked to friction and average fluid film thickness in the bearing. A dimensionless performance number was developed and correlated with the coefficient of friction based on the power loss measurements. The breakdown of fluid film lubrication at the limit of hydrodynamic lubrication was established for an average performance number. The accuracy of the experimental findings was explored by comparing the friction and film thickness calculated from the measurements with the predictions of a comprehensive software package. Some general agreement was obtained. The relationship between the lambda ratio and a modified performance number was also examined based on typical surface roughness measurements. Although the procedures developed did not provide a high level of precision, some clear insights were gained into the thrust bearing behaviour at the limit of hydrodynamic lubrication. In particular, a large spring-supported thrust bearing under a typical load with a common lubricant was shown to sustain predominantly hydrodynamic lubrication at rotational speeds as low as 10 rpm.

A.L. Brown; J.B. Medley; J.H. Ferguson

2000-01-01T23:59:59.000Z

209

1994 lubricating oil and wax capacities of U. S. and Canadian refineries  

SciTech Connect (OSTI)

The paper consists of several tables which list the names of US and Canadian refineries, their location, and their capacity for production of lubricating oil and waxes categorized by finishing operations and primary processing. A separate table lists US and Canadian re-refiners and their capacity for refining waste lubricating oils.

Not Available

1994-01-01T23:59:59.000Z

210

Diamond Shaving of Contaminated Concrete Surfaces  

SciTech Connect (OSTI)

Decommissioning and decontamination of existing facilities presents technological challenges. One major challenge is the removal of surface contamination from concrete floors and walls while eliminating the spread of contamination and volumetric reduction of the waste stream. Numerous methods have been tried with a varying degree of success. Recent technology has made this goal achievable and has been used successfully. This new technology is the Diamond Floor Shaver and Diamond Wall shaver. The Diamond Floor Shaver is a self-propelled, walk behind machine that literally shaves the contaminated concrete surface to specified depths. This is accomplished by using a patented system of 100 dry cutting diamond blades with offset diamond segments that interlock to provide complete shaving of the concrete surface. Grooves are eliminated which allows for a direct frisk reading to analyze results. When attached to an appropriate size vacuum, the dust produced is 100% contained. Dust is collected in drums ready for disposition and disposal. The waste produced in shaving 7,500 square feet at 1/8 inch thickness would fill a single 55 gallon drum. Production is dependent on depth of shaving but averages 100 square feet per hour. The wall shaver uses the same patented diamond drum and blades but is hydraulically driven and is deployed using a robotic arm allowing its operation to be to totally remote. It can reach ceilings as high as 20 feet. Numerous small projects were successfully completed using this technology. Large scale deployment came in 2003. Bluegrass, in conjunction with Bartlett Services, deployed this technology to support decontamination activities for closing of the Rocky Flats nuclear weapons site. Up to six floor shavers and one wall shaver were deployed in buildings B371 and B374. These buildings had up to one half-inch, fixed plutonium and beryllium contamination. Hundred-thousands of square feet of floors and walls were shaved successfully to depths of up to one half inch. Decontamination efforts were so successful the balance of the buildings could be demolished using conventional methods. The shavers helped keep the project on schedule while the vacuum system eliminated the potential for contaminants becoming airborne.

Mullen, Lisa K. [Bluegrass Concrete Cutting Inc., 107 Mildred Street PO Box 427, Greenville, Alabama 36037 (United States)

2008-01-15T23:59:59.000Z

211

Laser Method for Synthesis and Processing of Continuous Diamond Films on Nondiamond Substrates  

Science Journals Connector (OSTI)

...GRAIN-BOUNDARIES IN CVD DIAMOND THIN-FILMS...continuous diamond thin film. Carbon ions were...continuous diamond thin film. Carbon ions were...vapor deposition (CVD) methods such as...while usefilf for coating applications, are not suitable...

J. NARAYAN; V. P. GODBOLE; C. W. WHITE

1991-04-19T23:59:59.000Z

212

Diamond optics V; Proceedings of the Meeting, San Diego, CA, July 20, 21, 1992  

SciTech Connect (OSTI)

Attention is given to unconventional diamond and DLC deposition processes, deposition characterization; diamond characterization, and structural, thermal, and optical properties. Particular attention is given to diamond CVD growth chemistry; a synthesis technique of diamondlike carbon films by a laser ablation ion source in the atmosphere; mass spectrometry studies of diamond deposition; characterization of electron cyclotron resonance plasmas for diamond deposition; thinning and polishing of diamond films by a diffusional reaction with metals; twin quituplets in a CVD diamond; characterization of diamond films deposited by hot-filament CVD using CF4 as a doping gas by Raman spectroscopy, FTIR spectroscopy, and atomic force microscopy; properties of optically smooth diamond thin films produced by ECR-PACVD; calculations of energy barriers to CVD diamon growth; thermal properties of optical-quality diamond films; attenuated total reflectance infrared absorption in CVD diamond films; and optical properties of boron-doped diamond films.

Feldman, A.; Sandor, H.

1992-01-01T23:59:59.000Z

213

Diamonds are an Electronic Device's Best Friend | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Diamonds are an Electronic Device's Best Friend Diamonds are an Electronic Device's Best Friend Diamonds are an Electronic Device's Best Friend April 17, 2012 - 11:43am Addthis Ultrananocrystalline diamond has a diverse range of applications from the next generation of high-definition flat panel displays to coatings for mechanical pump seals and tools. | Photo courtesy of Argonne National Lab Ultrananocrystalline diamond has a diverse range of applications from the next generation of high-definition flat panel displays to coatings for mechanical pump seals and tools. | Photo courtesy of Argonne National Lab Charles Rousseaux Charles Rousseaux Senior Writer, Office of Science How does it work? As computer performance has improved, engineers have had a hard time dissipating the heat produced. Diamond film may be the answer, as it's much better at absorbing and

214

Impurity-defect interaction in polycrystalline silicon for photovoltaic applications. The role of hydrogen  

E-Print Network [OSTI]

of the cell ? ii) Will the defects of the polycrystalline material hinder the photovoltaic properties..., leading also to a degradation of the efficiency of the photovoltaic cells ? iii) What would655 Impurity-defect interaction in polycrystalline silicon for photovoltaic applications. The role

Paris-Sud XI, Université de

215

Effectiveness of guidelines for retiming signalized diamond interchanges  

E-Print Network [OSTI]

OF SCIENCE May 1991 Major Subject: Civil Engineering EFFECTIVENESS OF GUIDELINES FOR RETIMING SIGNALIZED DIAMOND INTERCHANGES A Thesis by YVONNE DENISE IRVINE Approved as to style and content by: Daniel B. Fambro (Chair of Committee) Thomas Urbanik.... For the diamond interchange test, the participants were randomly assigned to two groups: the control group with no guidelines as reference or the second group, with the guidelines. The average scores on the diamond interchange test were compared using analysis...

Irvine, Yvonne Denise

1991-01-01T23:59:59.000Z

216

Diamond Walnut Biomass Facility | Open Energy Information  

Open Energy Info (EERE)

Walnut Biomass Facility Walnut Biomass Facility Jump to: navigation, search Name Diamond Walnut Biomass Facility Facility Diamond Walnut Sector Biomass Location San Joaquin County, California Coordinates 37.9175935°, -121.1710389° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":37.9175935,"lon":-121.1710389,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

217

Diamond Willow Extension | Open Energy Information  

Open Energy Info (EERE)

Extension Extension Jump to: navigation, search Name Diamond Willow Extension Facility Diamond Willow Extension Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Montana-Dakota Utilities Developer Montana-Dakota Utilities Energy Purchaser Montana-Dakota Utilities Location Near Baker MT Coordinates 46.281621°, -104.271355° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":46.281621,"lon":-104.271355,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

218

Measurement of tool forces in diamond turning  

SciTech Connect (OSTI)

A dynamometer has been designed and built to measure forces in diamond turning. The design includes a 3-component, piezoelectric transducer. Initial experiments with this dynamometer system included verification of its predicted dynamic characteristics as well as a detailed study of cutting parameters. Many cutting experiments have been conducted on OFHC Copper and 6061-T6 Aluminum. Tests have involved investigation of velocity effects, and the effects of depth and feedrate on tool forces. Velocity has been determined to have negligible effects between 4 and 21 m/s. Forces generally increase with increasing depth of cut. Increasing feedrate does not necessarily lead to higher forces. Results suggest that a simple model may not be sufficient to describe the forces produced in the diamond turning process.

Drescher, J.; Dow, T.A.

1988-12-01T23:59:59.000Z

219

Precision diamond grinding of ceramics and glass  

SciTech Connect (OSTI)

A new research initiative will be undertaken to investigate the effect of machine parameters and material properties on precision diamond grinding of ceramics and glass. The critical grinding depth to initiate the plastic flow-to-brittle fracture regime will be directly measured using plunge-grind tests. This information will be correlated with machine parameters such as wheel bonding and diamond grain size. Multiaxis grinding tests will then be made to provide data more closely coupled with production technology. One important aspect of the material property studies involves measuring fracture toughness at the very short crack sizes commensurate with grinding damage. Short crack toughness value`s can be much less than the long-crack toughness values measured in conventional fracture tests.

Smith, S.; Paul, H.; Scattergood, R.O.

1988-12-01T23:59:59.000Z

220

Effect of sulfur on heavy duty diesel engine lubricants  

SciTech Connect (OSTI)

Diesel engine exhaust legislation has become quite onerous for heavy duty engines. Yet, these high thermal efficiency engines continue to meet lower exhaust particulate and NOx emissions limits, due to new engine designs and the complementary engine oil performance requirements of the API service categories. In addition, the EPA has mandated changes in on-highway diesel fuel to help meet particulate emissions regulations. On October 1, 1993, when the EPA outlawed high sulfur fuels for on-highway use, the development of the API CG-4 engine oil performance specification was already in progress. All the new diesel engine tests in the category were therefore designed to run with low (< 0.05% wt.) sulfur fuel. In some engine tests, this new fuel improved some lubricant performance characteristics and degraded others. An engine oil specification for low sulfur fuel brings new challenges to developing future specifications for diesel engine oils. Both higher and lower lubricant additive treat rate products, high performance single grade oils, and formulations to meet world-wide specifications become viable. This paper discusses the results of a diesel engine oil technology that performs well with the new, low sulfur fuel in both engine tests and in the field.

Hayden, T.E. [Texaco Fuels and Lubricants Research Dept., Beacon, NY (United States)

1996-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Waste lubricating oil: an annotated review. 1982 revision  

SciTech Connect (OSTI)

Because of renewed interest in waste oil, both in terms of energy conservation and as a threat to the environment, there appears to be a need for a systemic compilation of information on the subject. This is a revision of the 1979 manuscript (BETC/IC-79/4) reflecting publications of the last three years as well as incorporation of papers that were overlooked. The number of citations has jumped from 486 to 1203, with all previous citations also listed here. The bibliography is divided into broad subject areas. The Introduction gives the history and development of the used oil reclamation industry. The General section includes the comprehensive papers that address several subjects and thus, give a capsulated overview of the used oil situation. Sources of Information and Statistical Treatments of Data tell how to obtain additional and future information and data relating to waste oil and could aid those persons interested in keeping their knowledge current. The Other Lubricating Oils section covers many of the lubricants that have the potential for recycling. The Other Oils section is divided into four sub-sections to aid the reader to find the subject of interest. The section on Related Subjects includes those sideline areas that could apply to used oil reclamation.

Cotton, F.O.

1982-10-01T23:59:59.000Z

222

Nondestructive method and apparatus for imaging grains in curved surfaces of polycrystalline articles  

DOE Patents [OSTI]

A nondestructive method, and associated apparatus, are provided for determining the grain flow of the grains in a convex curved, textured polycrystalline surface. The convex, curved surface of a polycrystalline article is aligned in a horizontal x-ray diffractometer and a monochromatic, converging x-ray beam is directed onto the curved surface of the polycrystalline article so that the converging x-ray beam is diffracted by crystallographic planes of the grains in the polycrystalline article. The diffracted x-ray beam is caused to pass through a set of horizontal, parallel slits to limit the height of the beam and thereafter. The linear intensity of the diffracted x-ray is measured, using a linear position sensitive proportional counter, as a function of position in a direction orthogonal to the counter so as to generate two dimensional data. An image of the grains in the curved surface of the polycrystalline article is provided based on the two-dimensional data.

Carpenter, Donald A. (Lenior City, TN)

1995-01-01T23:59:59.000Z

223

Thin Sheet of Diamond Has Worlds of Uses  

DOE R&D Accomplishments [OSTI]

A new technique from Argonne National Laboratory creates thin diamond films that are helping industry save energy and could even be used in heart and eye implants.

Sagoff, Jared

2011-04-01T23:59:59.000Z

224

Black Diamond Power Co | Open Energy Information  

Open Energy Info (EERE)

Black Diamond Power Co Black Diamond Power Co Place West Virginia Utility Id 1764 Utility Location Yes Ownership I NERC Location RFC NERC RFC Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] Energy Information Administration Form 826[2] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png No rate schedules available. Average Rates Residential: $0.1200/kWh Commercial: $0.0685/kWh The following table contains monthly sales and revenue data for Black Diamond Power Co (West Virginia). Month RES REV (THOUSAND $) RES SALES (MWH) RES CONS COM REV (THOUSAND $) COM SALES (MWH) COM CONS IND_REV (THOUSAND $) IND SALES (MWH) IND CONS OTH REV (THOUSAND $) OTH SALES (MWH) OTH CONS TOT REV (THOUSAND $) TOT SALES (MWH) TOT CONS

225

Patterning of nanocrystalline diamond films for diamond microstructures useful in MEMS and other devices  

DOE Patents [OSTI]

MEMS structure and a method of fabricating them from ultrananocrystalline diamond films having average grain sizes of less than about 10 nm and feature resolution of less than about one micron . The MEMS structures are made by contacting carbon dimer species with an oxide substrate forming a carbide layer on the surface onto which ultrananocrystalline diamond having average grain sizes of less than about 10 nm is deposited. Thereafter, microfabrication process are used to form a structure of predetermined shape having a feature resolution of less than about one micron.

Gruen, Dieter M. (Downers Grove, IL); Busmann, Hans-Gerd (Bremen, DE); Meyer, Eva-Maria (Bremen, DE); Auciello, Orlando (Bolingbrook, IL); Krauss, Alan R. (late of Naperville, IL); Krauss, Julie R. (Naperville, IL)

2004-11-02T23:59:59.000Z

226

IEEE TRANSACTIONS ON MAGNETICS, VOL. 47, NO. 7, JULY 2011 1849 Enhanced Photo-Thermal Stability of Modified PFPE Lubricants Under  

E-Print Network [OSTI]

-type lubricants is of importance. Perfluoropolyethers (PFPEs) are widely used in hard disk drives due

Wang, Deli

227

Magnetoelectric coupling in polycrystalline FeVO4  

Science Journals Connector (OSTI)

We report coupling between magnetic and electric orders for antiferromagnetic polycrystalline FeVO4 in which magnetism-induced polarization has been recently found in noncollinear antiferromagnetic state below the second antiferromagnetic phase transition at TN2?15.7?K. In this low symmetry phase space group P1¯, the magnetic field dependence of electric polarization evidences a clear magnetoelectric coupling in the noncollinear spin-configured antiferromagnetic phase. The discontinuity of magnetodielectric effect observed at the vicinity of the polar to nonpolar transition evidences competition between different magnetodielectric couplings in the two different antiferromagnetic states. The existence of thermal expansion anomaly near TN2 and magnetostriction effect support magnetoelastically mediated scenario of the observed magnetoelectric effect.

Bohdan Kundys; Christine Martin; Charles Simon

2009-11-11T23:59:59.000Z

228

Electronic properties of polycrystalline graphene under large local strain  

SciTech Connect (OSTI)

To explore the transport properties of polycrystalline graphene under large tensile strain, a strain device has been fabricated using piezocrystal to load local strain onto graphene, up to 22.5%. Ionic liquid gate whose capability of tuning carrier density being much higher than that of a solid gate is used to survey the transfer characteristics of the deformed graphene. The conductance of the Dirac point and field effect mobility of electrons and holes is found to decrease with increasing strain, which is attributed to the scattering of the graphene grain boundaries, the strain induced change of band structure, and defects. However, the transport gap is still not opened. Our study is helpful to evaluate the application of graphene in stretchable electronics.

He, Xin; Tang, Ning, E-mail: ntang@pku.edu.cn, E-mail: geweikun@mail.tsinghua.edu.cn, E-mail: bshen@pku.edu.cn; Duan, Junxi; Mei, Fuhong; Meng, Hu; Lu, Fangchao; Xu, Fujun; Yang, Xuelin [State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871 (China); Gao, Li [Institute of Life Sciences, Jiangsu University, Zhenjiang 212013, Jiangsu Province (China); Wang, Xinqiang; Shen, Bo, E-mail: ntang@pku.edu.cn, E-mail: geweikun@mail.tsinghua.edu.cn, E-mail: bshen@pku.edu.cn [State Key Laboratory for Artificial Microstructure and Mesoscopic Physics, Peking University, Beijing 100871 (China); Collaborative Innovation Center of Quantum Matter, Beijing 100871 (China); Ge, Weikun, E-mail: ntang@pku.edu.cn, E-mail: geweikun@mail.tsinghua.edu.cn, E-mail: bshen@pku.edu.cn [Department of Physics, Tsinghua University, Beijing 100084 (China)

2014-06-16T23:59:59.000Z

229

Diamond thin films: a 21st-century material  

Science Journals Connector (OSTI)

...Research in Inorganic Materials (NIRIM) brought all...diamond lm with lament material. For diamond to be...molecules, the formation of active species, and nally...dia- mond cold cathode eld emission displays...over other electrode materials, such as Pt, which...

2000-01-01T23:59:59.000Z

230

The Phase I MX Beamlines at Diamond Light Source  

SciTech Connect (OSTI)

Three beamlines dedicated to macromolecular crystallography, I02, I03 and I04 at Diamond Light Source are presented. These beamlines formed the life science component of Phase 1 of Diamond Light Source. The article provides details of the design and the current status of the beamlines.

Duke, E. M. H.; Evans, G.; Flaig, R.; Hall, D. R.; Latchem, M.; McAuley, K. E.; Sandy, D. J.; Sorensen, T. L-M.; Waterman, D.; Johnson, L. N. [Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxon. OX11 0DE (United Kingdom)

2010-06-23T23:59:59.000Z

231

COMPACTIFICATIONS OF ADJOINT ORBITS AND THEIR HODGE DIAMONDS  

E-Print Network [OSTI]

manifold X, a symplectic Lefschetz fibration (SLF) on X is a fibration f : X C that has only Morse type of the SLF. Calculating such Hodge diamonds is computationally heavy, so we used Macaulay2. Details as for the fibres of the SLF can be read off the Hodge diamonds. Remark 1. Choosing a compactification is in general

Gasparim, Elizabeth

232

The Polishing, Surface Flow and Wear of Diamond and Glass  

Science Journals Connector (OSTI)

...Polishing, Surface Flow and Wear of Diamond and Glass F. P. Bowden H. G. Scott It has been shown that a diamond sliding on glass can under suitable conditions induce surface flow of the glass. The speed (v) and load (W) necessary to cause...

1958-01-01T23:59:59.000Z

233

Renewable Fuels and Lubricants (ReFUEL) Laboratory (Fact Sheet)  

SciTech Connect (OSTI)

This fact sheet describes the Renewable Fuels and Lubricants (ReFUEL) Laboratory at the U.S. Department of Energy National Renewable Energy Laboratory (NREL) is a state-of-the-art research and testing facility for advanced fuels and vehicles. Research and development aims to improve vehicle efficiency and overcome barriers to the increased use of renewable diesel and other nonpetroleum-based fuels, such as biodiesel and synthetic diesel derived from biomass. The ReFUEL Laboratory features a chassis dynamometer for vehicle performance and emissions research, two engine dynamometer test cells for advanced fuels research, and precise emissions analysis equipment. As a complement to these capabilities, detailed studies of fuel properties, with a focus on ignition quality, are performed at NREL's Fuel Chemistry Laboratory.

Not Available

2012-03-01T23:59:59.000Z

234

Impact of graphene polycrystallinity on the performance of graphene field-effect transistors  

SciTech Connect (OSTI)

We have used a multi-scale physics-based model to predict how the grain size and different grain boundary morphologies of polycrystalline graphene will impact the performance metrics of graphene field-effect transistors. We show that polycrystallinity has a negative impact on the transconductance, which translates to a severe degradation of the maximum and cutoff frequencies. On the other hand, polycrystallinity has a positive impact on current saturation, and a negligible effect on the intrinsic gain. These results reveal the complex role played by graphene grain boundaries and can be used to guide the further development and optimization of graphene-based electronic devices.

Jiménez, David; Chaves, Ferney [Departament d'Enginyeria Electrònica, Escola d'Enginyeria, Universitat Autònoma de Barcelona, 08193-Bellaterra (Spain); Cummings, Aron W.; Van Tuan, Dinh [ICN2, Institut Català de Nanociencia i Nanotecnologia, Campus UAB, 08193 Bellaterra (Barcelona) (Spain); Kotakoski, Jani [Faculty of Physics, University of Vienna, Boltzmanngasse 5, 1090 Wien (Austria); Department of Physics, University of Helsinki, P.O. Box 43, 00014 University of Helsinki (Finland); Roche, Stephan [ICN2, Institut Català de Nanociencia i Nanotecnologia, Campus UAB, 08193 Bellaterra (Barcelona) (Spain); ICREA, Institució Catalana de Recerca i Estudis Avançats, 08070 Barcelona (Spain)

2014-01-27T23:59:59.000Z

235

Nonlinear optical spectroscopy of diamond surfaces  

SciTech Connect (OSTI)

Second harmonic generation (SHG) and infrared-visible sum frequency generation (SFG) spectroscopies have been shown to be powerful and versatile for studying surfaces with submonolayer sensitivity. They have been used in this work to study bare diamond surfaces and molecular adsorption on them. In particular, infrared-visible SFG as a surface vibrational spectroscopic technique has been employed to identify and monitor in-situ surface bonds and species on the diamond (111) surface. The CH stretch spectra allow us to investigate hydrogen adsorption, desorption, abstraction, and the nature of the hydrogen termination. The C(111) surface dosed with atomic hydrogen was found to be in a monohydride configuration with the hydrogen atoms situated at top-sites. The ratio of the abstraction rate to the adsorption rate was appreciable during atomic hydrogen dosing. Kinetic parameters for thermal desorption of H on C(111) were determined showing a near first-order kinetics. For the fully H-terminated (111) surface, a large (110 cm{sup {minus}1}) anharmonicity and {approximately}19 psec lifetime were measured for the first-excited CH stretch mode. The bare reconstructed C(111)-(2 {times} l) surface showed the presence of CC stretch modes which were consistent with the Pandey {pi}-bonded chain structure. When exposed to the methyl radical, the SFG spectra of the C(111) surface showed features suggesting the presence of adsorbed methyl species. After heating to sufficiently high temperatures, they were converted into the monohydride species. Preliminary results on the hydrogen-terminated diamond (100) surface are also presented.

Chin, R.P.

1995-04-01T23:59:59.000Z

236

Diamond machine tool face lapping machine  

DOE Patents [OSTI]

An apparatus for shaping, sharpening and polishing diamond-tipped single-point machine tools. The isolation of a rotating grinding wheel from its driving apparatus using an air bearing and causing the tool to be shaped, polished or sharpened to be moved across the surface of the grinding wheel so that it does not remain at one radius for more than a single rotation of the grinding wheel has been found to readily result in machine tools of a quality which can only be obtained by the most tedious and costly processing procedures, and previously unattainable by simple lapping techniques.

Yetter, H.H.

1985-05-06T23:59:59.000Z

237

Nano-diamonds in the Universe A.C. Andersen,1  

E-Print Network [OSTI]

Nano-diamonds in the Universe A.C. Andersen,1 H. Mutschke,2 L. Binette3 , S. Höfner4 1 NORDITA, SE-75120 Uppsala Sweden The first direct evidence for nano-diamonds in space came from meteorites. Laboratory analyses on fine-grained diamond residues from primitive meteorites have shown that nano- diamonds

Andersen, Anja C.

238

Coupling of nitrogen-vacancy centers in diamond to a GaP waveguide  

E-Print Network [OSTI]

The optical coupling of guided modes in a GaP waveguide to nitrogen-vacancy (NV) centers in diamond is demonstrated. The electric field penetration into diamond and the loss of the guided mode are measured. The results indicate that the GaP-diamond system could be useful for realizing coupled microcavity-NV devices for quantum information processing in diamond.

K. -M. C. Fu; C. Santori; P. E. Barclay; I. Aharonovich; S. Prawer; N. Meyer; A. M. Holm; R. G. Beausoleil

2008-11-03T23:59:59.000Z

239

Vehicle Technologies Office: 2013 Fuel and Lubricant Technologies R&D Annual Progress Report  

Broader source: Energy.gov [DOE]

This report describes the progress over the course of 2013 made on the research and development projects funded by the Fuel and Lubricants subprogram in the Vehicle Technologies Office.

240

High temperature solid lubricant materials for heavy duty and advanced heat engines  

SciTech Connect (OSTI)

Advanced engine designs incorporate higher mechanical and thermal loading to achieve efficiency improvements. This approach often leads to higher operating temperatures of critical sliding elements (e.g. piston ring/cylinder wall contacts and valve guides) which compromise the use of conventional and even advanced synthetic liquid lubricants. For these applications solid lubricants must be considered. Several novel solid lubricant composites and coatings designated PS/PM200 have been employed to dry and marginally oil lubricated contacts in advanced heat engines. These applications include cylinder kits of heavy duty diesels, and high temperature sterling engines, sidewall seals of rotary engines and various exhaust valve and exhaust component applications. The following paper describes the tribological and thermophysical properties of these tribomaterials and reviews the results of applying them to engine applications. Other potential tribological materials and applications are also discussed with particular emphasis to heavy duty and advanced heat engines.

DellaCorte, C.; Wood, J.C.

1994-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Modeling the lubrication of the piston ring pack in internal combustion engines using the deterministic method  

E-Print Network [OSTI]

Piston ring packs are used in internal combustion engines to seal both the high pressure gas in the combustion chamber and the lubricant oil in the crank case. The interaction between the piston ring pack and the cylinder ...

Chen, Haijie

2011-01-01T23:59:59.000Z

242

Rheological Modification of Lubricating Greases with Recycled Polymers from Different Plastics Waste  

Science Journals Connector (OSTI)

Rheological Modification of Lubricating Greases with Recycled Polymers from Different Plastics Waste ... Tall, S.; Albertsson, A. C.; Karlsson, S. Recycling of Mixed Plastic Fractions: Mechanical Properties of Multicomponent Extruded Polyolefin Blends Using Response Surface Methodology J. Appl. ...

J. E. Martín-Alfonso; C. Valencia; M. C. Sánchez; J. M. Franco; C. Gallegos

2009-03-12T23:59:59.000Z

243

Determination of properties of PVE lubricants with HFC refrigerants[PolyVinylEther  

SciTech Connect (OSTI)

Polyalkyleneglycol (PAG) and polyol ester (POE) have been developed as refrigeration lubricants, used with HFC134a. PAG is used for automotive air conditioning systems and POE is used for domestic reciprocating refrigerators and for A/C systems. Although PAG exhibits good lubricity performance, it is difficult to use for domestic reciprocating refrigerators due to its low dielectric property. POE is difficult to use for automotive A/C systems, due to hydrolysis and poor lubricity performance. Polyvinylether (PVE) can be used in place of PAG and POE with HFC refrigerants. PVE is used for A/C systems as well as refrigerator and freezer applications. PVE is an ideal lubricant for use with HFCs.

Kaneko, Masato; Sakanoue, Shuichi; Tazaki, Toshihiro; Tominaga, Shoichi; Takagi, Minoru; Goodin, M.

1999-07-01T23:59:59.000Z

244

Effects of Y_(2)O_(3) and ?-ZrP Additives on Lubrication of Grease  

E-Print Network [OSTI]

Development of novel additives in lubricants is a promising approach for high performance and energy saving devices. Those include automotive, marine, and wind turbines. In a wind turbine, the unplanned break-down rate of bearings caused by improper...

Kim, Chung Jwa

2014-07-28T23:59:59.000Z

245

Few-Layer Graphene as a Dry Lubricant | Argonne National Laboratory  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Few-Layer Graphene as a Dry Lubricant Technology available for licensing: Graphene layers act as a two-dimensional nanomaterial and form a conformal protective coating on sliding...

246

Determination of Wear Metals in Marine Lubricating Oils by Microwave Digestion and Atomic Absorption Spectrometry  

Science Journals Connector (OSTI)

?The difficulties associated with the development of a microwave-assisted acid digestion of lubricating oils in determination of wear metals are presented. The interest of this sample treatment lies in its bas...

Celestino Sanz-Segundo; María P. Hernández-Artiga…

1999-11-01T23:59:59.000Z

247

Effects of lubricant viscosity and surface texturing on ring-pack performance in internal combustion engines  

E-Print Network [OSTI]

The piston ring-pack contributes approximately 25% of the mechanical losses in an internal combustion engine. Both lubricant viscosity and surface texturing were investigated in an effort to reduce this ring-pack friction ...

Takata, Rosalind (Rosalind Kazuko), 1978-

2006-01-01T23:59:59.000Z

248

The Impact of Lubricant on Emissions from a Medium-Duty Diesel...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

on Emissions from a Medium-Duty Diesel Engine The Impact of Lubricant on Emissions from a Medium-Duty Diesel Engine 2002 DEER Conference Presentation: National Renewable Energy Lab...

249

E-Print Network 3.0 - applying controllable lubrication Sample...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

-align and mount to the hydrophilic trench binding sites with electric connections by heat curable lubricant oil... and well-controlled bonding of bulk PZTs for micro pumps with...

250

A tribological study of the interaction between surface micro texturing and viscoelastic lubricants  

E-Print Network [OSTI]

An experimental study is performed on micro textured surfaces using both elastic and Newtonian fluids in order to understand the effect of surface texturing and fluid rheology on sliding friction under lubricated conditions. ...

Hupp, Sara J. (Sara Jean), 1979-

2004-01-01T23:59:59.000Z

251

Compressors Without Lubrication of Cylinders for Automobile Gas-Filling Stations  

Science Journals Connector (OSTI)

Technical data for nonlubricated compressors built on a new vertical base and characteristics of new self-lubricating antifriction materials (based on fiber-reinforced fluoroplastic and heat-resistant polyamid...

V. P. Zakharenko; I. I. Novikov

252

Properties of carbon overcoats and perfluoro-polyether lubricants in hard disk drives  

E-Print Network [OSTI]

stable head-disk interface at ultralow flying height," IEEElow flying sliders during contact with a lubricated disk,"for stable flying of the slider over the disk [16], [17].

Brunner, Ralf

2009-01-01T23:59:59.000Z

253

LinearizedAnalysesof MolecularGasFilmLubricationEquation (GeneralizedtheoryfordynamiccharacteristicsofInfinitewidthslideronrunningdisk)  

E-Print Network [OSTI]

number to squeeze number . Key Words : Tribology, Molecular Gas Film Lubrication, Magnetic Disk Storage, Flying Head Slider, Squeeze Force, Linearlized Solution , , 1 10P , 01P (2), (3) (1) , ( )O : 2 10

Matsuoka, Hiroshige

254

Evaluation of energy efficiency in cutting aerospace materials with high-pressure cooling lubricant supply  

Science Journals Connector (OSTI)

In the field of machining difficult-to-cut materials like titanium or nickel-based alloys, the use of high-pressure cooling lubricant supply (HPCLS) offers ... , tool wear can be decreased which allows higher app...

Fritz Klocke; Dieter Lung; Tolga Cayli…

2014-06-01T23:59:59.000Z

255

Effect of Lubricant on the Formation of Heavy-Duty Diesel Exhaust Nanoparticles  

Science Journals Connector (OSTI)

Effect of Lubricant on the Formation of Heavy-Duty Diesel Exhaust Nanoparticles ... The effect of lubricants on nanoparticle formation in heavy-duty diesel exhaust with and without a continuously regenerating diesel particulate filter (CRDPF) is studied. ... The fine particles in diesel exhaust contain solid material produced during combustion process and volatile organic and sulfur compounds converted to particle phase during the exhaust gas cooling and dilution. ...

Kati Vaaraslahti; Jorma Keskinen; Barouch Giechaskiel; Anu Solla; Timo Murtonen; Hannu Vesala

2005-09-22T23:59:59.000Z

256

Relationship of Viscosity, Surface Tensions, and Coefficient of Friction of Lubricating Oils  

E-Print Network [OSTI]

in that a para- fine contains two atoms more hydrogen than the corresponding 22 number of the olefino group; for example, the lowest number of each group is respectively: Harsh Gas CE4 Olefiant Gas CHZ Americans and Russians lubricating mineral oils...RELATI01ISHII OF VISCOSITY, SUHFACE TEUSIOUS, A3D COEFFICIENT O? FlilCTIOB 0? LUBRICATING OILS. A Thesis Submitted to the Faculty of the Graduate School, University of Kansas, Lawrence. For The Degree of Master of Science ilechanioal...

Carson, Earl

1914-01-01T23:59:59.000Z

257

Re-refined lubrication oils. (Latest citations from the NTIS bibliographic database). Published Search  

SciTech Connect (OSTI)

The bibliography contains citations concerning treatments and re-refining of used lubrication oils. Topics include the decontamination processes, reclamation of automobile oils, and handling and storage of waste oils. Environmental analyses of used oil recycling are included. Environmental, resource conservation, and economic aspects of recycled lubricating oils are also discussed. (Contains 50-250 citations and includes a subject term index and title list.)

NONE

1995-07-01T23:59:59.000Z

258

Modeling Elasto-Plastic Behavior of Polycrystalline Grain Structure of Steels at Mesoscopic Level  

E-Print Network [OSTI]

Modeling Elasto-Plastic Behavior of Polycrystalline Grain Structure of Steels at Mesoscopic Level. The constitutive model of crystal grains utilizes anisotropic elasticity and crystal plasticity. Commercially be considered macroscopically homogeneous. Elastic and rate independent plastic deformation modes are considered

Cizelj, Leon

259

Polycrystalline silicon thin-film solar cells on glass by ion-assisted deposition.  

E-Print Network [OSTI]

??Polycrystalline silicon (pc-Si, grain size > 1??m, no amorphous tissue) on glass is an interesting material for thin-film solar cells due to the low costs,… (more)

Straub, Axel

2005-01-01T23:59:59.000Z

260

Polycrystalline Thin-Film Research: Copper Indium Gallium Diselenide (Fact Sheet)  

SciTech Connect (OSTI)

Capabilities fact sheet for the National Center for Photovoltaics: Polycrystalline Thin-Film Research: Copper Indium Gallium Diselenide that includes scope, core competencies and capabilities, and contact/web information.

Not Available

2011-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Laser-induced short time scale thermal chemistry of perfluoropolyether lubricant films  

SciTech Connect (OSTI)

The authors investigate the effect of heating a perfluoropolyether lubricant film in a localized area for relatively short time periods using laser irradiation versus conventional oven heating. These experiments help provide understanding on how flash temperatures generated at frictional contacts affect the thermal chemistry of lubricant films. In these experiments, a CO{sub 2} laser heats a 50 {micro}m wide area of a silicon wafer for time periods ranging from 0.1 to 60 s. The surface temperature within the heated area (up to 280 C in these experiments) is monitored with a second laser by measuring the change in reflectivity near the center of the heated area. A major difference observed for laser heating compared to oven heating is that the effective evaporation rate is orders of magnitude higher for laser heating. If the lubricant film is heated for sufficiently long enough time at high temperatures, the authors are able to observe thermal bonding of the lubricant via its alcohol end groups to the silicon oxide surface, followed by thermal decomposition of the lubricant molecules. After laser heating, the authors are able to observe the diffusion of lubricant back into the localized heated area using a combination of optical microscopy and imaging ellipsometry.

Heller, J.; Mate, C.J.; Poon, C.C.; Tam, A.C.

1999-11-09T23:59:59.000Z

262

Ionic Liquids as Novel Lubricants and Additives for Diesel Engine Applications  

SciTech Connect (OSTI)

The lubricating properties of two ionic liquids with the same anion but different cations, one ammonium IL [C8H17]3NH.Tf2N and one imidazolium IL C10mim.Tf2N, were evaluated both in neat form and as oil additives. Experiments were conducted using a standardized reciprocating sliding test using a segment of a Cr-plated diesel engine piston ring against a grey cast iron flat specimen with simulated honing marks as on the engine cylinder liner. The selected ionic liquids were benchmarked against conventional hydrocarbon oils. Substantial friction and wear reductions, up to 55% and 34%, respectively, were achieved for the neat ionic liquids compared to a fully-formulated 15W40 engine oil. Adding 5 vol% ILs into mineral oil has demonstrated significant improvement in the lubricity. One blend even outperformed the 15W40 engine oil with 9% lower friction and 34% less wear. Lubrication regime modeling, worn surface morphology examination, and surface chemical analysis were conducted to help understand the lubricating mechanisms for ionic liquids. Results suggest great potential for using ionic liquids as base lubricants or lubricant additives for diesel engine applications.

Qu, Jun [ORNL; Blau, Peter Julian [ORNL; Dai, Sheng [ORNL; Luo, Huimin [ORNL; Meyer III, Harry M [ORNL

2009-01-01T23:59:59.000Z

263

Performance evaluation of bound diamond ring tools  

SciTech Connect (OSTI)

LLNL is collaborating with the Center for Optics Manufacturing (COM) and the American Precision Optics Manufacturers Association (APOMA) to optimize bound diamond ring tools for the spherical generation of high quality optical surfaces. An important element of this work is establishing an experimentally-verified link between tooling properties and workpiece quality indicators such as roughness, subsurface damage and removal rate. In this paper, we report on a standardized methodology for assessing ring tool performance and its preliminary application to a set of commercially-available wheels. Our goals are to (1) assist optics manufacturers (users of the ring tools) in evaluating tools and in assessing their applicability for a given operation, and (2) provide performance feedback to wheel manufacturers to help optimize tooling for the optics industry. Our paper includes measurements of wheel performance for three 2-4 micron diamond bronze-bond wheels that were supplied by different manufacturers to nominally- identical specifications. Preliminary data suggests that the difference in performance levels among the wheels were small.

Piscotty, M.A.; Taylor, J.S.; Blaedel, K.L.

1995-07-14T23:59:59.000Z

264

Modeling the elastic and plastic response of single crystals and polycrystalline aggregates  

E-Print Network [OSTI]

MODELING THE ELASTIC AND PLASTIC RESPONSE OF SINGLE CRYSTALS AND POLYCRYSTALLINE AGGREGATES A Thesis by PARAG VILAS PATWARDHAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment... of the requirements for the degree of MASTER OF SCIENCE December 2003 Major Subject: Mechanical Engineering MODELING THE ELASTIC AND PLASTIC RESPONSE OF SINGLE CRYSTALS AND POLYCRYSTALLINE AGGREGATES A Thesis by PARAG VILAS...

Patwardhan, Parag Vilas

2005-02-17T23:59:59.000Z

265

ANL/APS/TB-24 Diamond Monochromators for APS Undulator-A Beamlines  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

4 4 Diamond Monochromators for APS Undulator-A Beamlines R.C. Blasdell, L. A. Assoufid, and D. M. Mills TABLE OF CONTENTS 1. INTRODUCTION .................................................................................1 2. PHYSICAL PROPERTIES OF DIAMONDS ..................................................5 2.1 Varieties of Diamonds ....................................................................5 2.2 The Lattice Parameter .....................................................................5 2.3 Bulk Thermal and Mechanical Properties ...............................................6 2.4 Typical Surface and Lattice Plane Morphology ......................................8 2.5 The Liquid-GaIn/Diamond Interface ...................................................10 3. DIFFRACTION PROPERTIES OF DIAMOND

266

Properties of boron-doped thin films of polycrystalline silicon  

SciTech Connect (OSTI)

The properties of polycrystalline-silicon films deposited by low pressure chemical vapor deposition and doped heavily in situ boron-doped with concentration level of around 2×10{sup 20}cm{sup ?3} has been studied. Their properties are analyzed using electrical and structural characterization means by four points probe resistivity measurements and X-ray diffraction spectra. The thermal-oxidation process are performed on sub-micron layers of 200nm/c-Si and 200nm/SiO{sub 2} deposited at temperatures T{sub d} ranged between 520°C and 605°C and thermally-oxidized in dry oxygen ambient at 945°C. Compared to the as-grown resistivity with silicon wafers is known to be in the following sequence < and < . The measure X-ray spectra is shown, that the Bragg peaks are marked according to the crystal orientation in the film deposited on bare substrates (poly/c-Si), for the second series of films deposited on bare oxidized substrates (poly/SiO{sub 2}) are clearly different.

Merabet, Souad [Electronic Department, Faculty of Science and Technology, University of Jijel, Cité Ouled-Aissa B. P. 98 Jijel, 18 000 Jijel (Algeria)

2013-12-16T23:59:59.000Z

267

Observation of diamond turned OFHC copper using Scanning Tunneling Microscopy  

SciTech Connect (OSTI)

Diamond turned OFHC copper samples have been observed within the past few months using the Scanning Tunneling Microscope. Initial results have shown evidence of artifacts which may be used to better understand the diamond turning process. The STM`s high resolution capability and three dimensional data representation allows observation and study of surface features unobtainable with conventional profilometry systems. Also, the STM offers a better quantitative means by which to analyze surface structures than the SEM. This paper discusses findings on several diamond turned OFHC copper samples having different cutting conditions. Each sample has been cross referenced using STM and SEM.

Grigg, D.A.; Russell, P.E.; Dow, T.A.

1988-12-01T23:59:59.000Z

268

Understanding of Defect Physics in Polycrystalline Photovoltaic Materials: Preprint  

SciTech Connect (OSTI)

The performance of thin-film solar cells is influenced by the quality of interfaces and formation of defects such as point defects, stacking faults, twins, dislocations, and grain boundaries. It is important to understand the defect physics so that appropriate methods may be developed to suppress the formation of harmful defects. Here, we review our understanding of defect physics in thin-film photovoltaic (PV) materials such as Si, CdTe, Cu(In,Ga)Se2 (CIGS), Cu2ZnSnSe2 (CZTSe), and Cu2ZnSnS2 (CZTS) using the combination of nanoscale electron microscopy characterization and density-functional theory (DFT). Although these thin-film PV materials share the same basic structural feature - diamond structure based - the defect physics in them could be very different. Some defects, such as stacking faults and special twins, have similar electronic properties in these thin-film materials. However, some other defects, such as grain boundaries and interfaces, have very different electronic properties in these materials. For example, grain boundaries produce harmful deep levels in Si and CdTe, but they do not produce significant deep levels in CIGS, CZTSe, and CZTS. These explain why passivation is critical for Si and CdTe solar cells, but is less important in CIS and CZTS solar cells. We further provide understanding of the effects of interfaces on the performance of solar cells made of these PV materials.

Yan, Y.

2011-07-01T23:59:59.000Z

269

Examining Effects of Lubricant Composition in Engine Component Systems in Pursuit of Enhanced Efficiency under Environmental Constraints  

Broader source: Energy.gov [DOE]

Four lubricant technical themes are presented that aim to work synergistically with advanced engine technologies to meet a goal of improving mechanical efficiency by 10 percent.

270

Process for producing a corrosion-resistant solid lubricant coating  

SciTech Connect (OSTI)

A corrosion-resistant surface formed of a sulfide-forming metal, in particular nickel, is first subjected to an electric plasma in an atmosphere containing hydrogen sulfide to form an adherent sulfide on said surface. The sulfided surface is then exposed to simultaneous cathodic sputtering of at least one solid lubricant which is a chalcogen compound of layer structure, in particular MoS/sub 2/, and at least one hydrophobic solid polymer, in particular PTFE. The coating thus formed is a composite coating in which the particles of the chalcogen compound are coated by the polymer. When the surface of the part to be coated does not consist of a corrosion-resistant sulfide-forming metal, a layer of such a metal is first deposited by cathodic sputtering. The composite coating withstands a wet oxidizing atmosphere, contrary to a coating of MoS/sub 2/ alone, and the method is applicable to any mechanical part intended to rub on other surfaces, such as a watch balance wheel staff and ball or roller bearings.

Niederhaeuser, P.; Hintermann, H.E.; Maillat, M.

1983-11-15T23:59:59.000Z

271

Very low friction for diamond sliding on diamond in water Plasma Processing Laboratory, Auburn University, 200 Broun Hall, Auburn, Alabama 36849  

E-Print Network [OSTI]

Very low friction for diamond sliding on diamond in water Y. Tzeng Plasma Processing Laboratory for publication 17 September 1993) This letter reports the lowest coefficient of friction measured for diamond a load of 50 g, the coefficient of friction falls to -0.001. This clearly shows the effectiveness

Tzeng, Yonhua

272

Electrodeposited coatings for diamond turning applications  

SciTech Connect (OSTI)

Electrodeposited coatings are attractive for precision machining operations because thick coatings can be economically applied, with good adhesion, to a variety of substrates. Approximately 20 pure metals and a large number of alloys can be deposited from aqueous solutions. Fused salt and organic solvent electrolytes can be used to lengthen the list of metals that can be electrodeposited. However, both the choice of the metallic coating and the control of the plating process are critical for success in precision finishing of electrodeposited coatings. Some preliminary results at the National Institute of Standards and Technology and at the Lawrence Livermore National Laboratory suggest that electrodeposited nickel-phosphorus alloys are excellent coatings for single point diamond turning from the standpoint of material properties and low tool wear. Electrodeposited aluminum and aluminum alloy coatings also merit consideration for precision finishing where weight is an important factor. 10 refs., 6 figs.

Mayer, A.; Bramlett, R.D.; Day, R.D. (Los Alamos National Lab., NM (USA)); Evans, C.J.; Polvani, R.S. (National Inst. of Standards and Technology, Gaithersburg, MD (USA))

1991-01-01T23:59:59.000Z

273

A Test Beamline on Diamond Light Source  

SciTech Connect (OSTI)

A Test beamline B16 has been built on the 3 GeV Diamond synchrotron radiation source. The beamline covers a wide photon energy range from 2 to 25 keV. The beamline is highly flexible and versatile in terms of the available beam size (a micron to 100 mm) and the range of energy resolution and photon flux; by virtue of its several operational modes, and the different inter-changeable instruments available in the experiments hutch. Diverse experimental configurations can be flexibly configured using a five-circle diffractometer, a versatile optics test bench, and a suite of detectors. Several experimental techniques including reflectivity, diffraction and imaging are routinely available. Details of the beamline and its measured performance are presented.

Sawhney, K. J. S.; Dolbnya, I. P.; Tiwari, M. K.; Alianelli, L.; Scott, S. M.; Preece, G. M.; Pedersen, U. K.; Walton, R. D. [Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, Oxfordshire-OX11 0DE (United Kingdom)

2010-06-23T23:59:59.000Z

274

Diamond based single molecule magnetic resonance spectroscopy  

E-Print Network [OSTI]

The detection of a nuclear spin in an individual molecule represents a key challenge in physics and biology whose solution has been pursued for many years. The small magnetic moment of a single nucleus and the unavoidable environmental noise present the key obstacles for its realization. Here, we demonstrate theoretically that a single nitrogen-vacancy (NV) center in diamond can be used to construct a nano-scale single molecule spectrometer that is capable of detecting the position and spin state of a single nucleus and can determine the distance and alignment of a nuclear or electron spin pair. The proposed device will find applications in single molecule spectroscopy in chemistry and biology, such as in determining protein structure or monitoring macromolecular motions and can thus provide a tool to help unravelling the microscopic mechanisms underlying bio-molecular function.

Jianming Cai; Fedor Jelezko; Martin B. Plenio; Alex Retzker

2011-12-23T23:59:59.000Z

275

Diamond Green Diesel: Diversifying Our Transportation Fuel Supply |  

Broader source: Energy.gov (indexed) [DOE]

Diamond Green Diesel: Diversifying Our Transportation Fuel Supply Diamond Green Diesel: Diversifying Our Transportation Fuel Supply Diamond Green Diesel: Diversifying Our Transportation Fuel Supply January 20, 2011 - 3:48pm Addthis Jonathan Silver Jonathan Silver Executive Director of the Loan Programs Office What does this project do? Nearly triples the amount of renewable diesel produced domestically Diversifies the U.S. fuel supply Today, Secretary Chu announced the offer of a conditional commitment for a $241 million loan guarantee to Diamond Green Diesel, LLC., the DOE Loan Program's first conditional commitment for an advanced biofuels plant. The loan guarantee will support the construction of a 137-million gallon per year renewable diesel facility that will produce renewable diesel fuel primarily from animal fats, used cooking oil and other waste grease

276

Argonne researchers develop two new diamond inventions | Argonne...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

develop two new diamond inventions By Jared Sagoff * October 10, 2014 Tweet EmailPrint ARGONNE, Ill. - Researchers at the U.S. Department of Energy's Argonne National Laboratory...

277

Low-Pressure, Metastable Growth of Diamond and "Diamondlike" Phases  

Science Journals Connector (OSTI)

...HYDROCARBON PLASMA, THIN SOLID...MICROWAVE PLASMA, JOURNAL...KAWARADA, H, LARGE AREA CHEMICAL...MAGNETOMICROWAVE PLASMA, JAPANESE...CARBON-FILMS BY RF GLOW-DISCHARGE...INDUCTION THERMAL PLASMA...DIAMOND AT ATMOSPHERIC-PRESSURE...JOURNAL OF NON-CRYSTALLINE...

JOHN C. ANGUS; CLIFF C. HAYMAN

1988-08-19T23:59:59.000Z

278

Plasma-assisted conversion of solid hydrocarbon to diamond  

DOE Patents [OSTI]

A process of preparing diamond, e.g., diamond fiber, by subjecting a hydrocarbon material, e.g., a hydrocarbon fiber, to a plasma treatment in a gaseous feedstream for a sufficient period of time to form diamond, e.g., a diamond fiber is disclosed. The method generally further involves pretreating the hydrocarbon material prior to treatment with the plasma by heating within an oxygen-containing atmosphere at temperatures sufficient to increase crosslinking within said hydrocarbon material, but at temperatures insufficient to melt or decompose said hydrocarbon material, followed by heating at temperatures sufficient to promote outgassing of said crosslinked hydrocarbon material, but at temperatures insufficient to convert said hydrocarbon material to carbon.

Valone, Steven M. (Santa Fe, NM); Pattillo, Stevan G. (Los Alamos, NM); Trkula, Mitchell (Los Alamos, NM); Coates, Don M. (Santa Fe, NM); Shah, S. Ismat (Wilmington, DE)

1996-01-01T23:59:59.000Z

279

Diamond graphs and super-reflexivity William B. Johnson  

E-Print Network [OSTI]

Diamond graphs and super-reflexivity William B. Johnson and Gideon Schechtman Abstract The main results is that dimension reduction a-la Johnson­Lindenstrauss fails in any non super reflexive space

Johnson, William B.

280

Thin diamond films provide new material for micro-machines |...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Thin diamond films provide new material for micro-machines By Jared Sagoff * July 31, 2014 Tweet EmailPrint ARGONNE, Ill. - Airbags, inkjet printers and video projectors may not...

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

HODGE DIAMONDS OF ADJOINT ORBITS BRIAN CALLANDER AND ELIZABETH GASPARIM  

E-Print Network [OSTI]

- pactifications of adjoint orbits and of the fibres of symplectic Lefschetz fibra- tions (SLF) on them. The Macaulay2 function hh can then be used to calculate the corresponding Hodge diamonds. An SLF is a fibration

Gasparim, Elizabeth

282

Nano-manipulation of diamond-based single photon sources  

Science Journals Connector (OSTI)

The ability to manipulate nano-particles at the nano-scale is critical for the development of active quantum systems. This paper presents a technique to manipulate diamond...

Ampem-Lassen, Eric; Simpson, D A; Gibson, B C; Trpkovski, S; Hossain, F M; Huntington, S T; Ganesan, K; Hollenberg, L C; Prawer, S

2009-01-01T23:59:59.000Z

283

Argonne CNM News: State-of-the-Art Diamond Semiconductor Technology  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

State-of-the-Art Diamond Semiconductor Technology Licensed to AKHAN Technologies State-of-the-Art Diamond Semiconductor Technology Licensed to AKHAN Technologies The U.S. Department of Energy's Argonne National Laboratory announced today that the laboratory has granted AKHAN Technologies, Inc., exclusive diamond semiconductor application licensing rights to breakthrough low-temperature diamond deposition technology developed by Argonne's Center for Nanoscale Materials (CNM). The method allows for the deposition of nanocrystalline diamond on a variety of wafer substrate materials at temperatures as low as 400°C, highly advantageous for integration with processed semiconductor electronic materials and resulting in the deposition of low-defect nanocrystalline diamond (NCD) thin films. The combination of CNM's low-temperature diamond technology with the AKHAN Miraj Diamond(tm) process represents the state of the art in diamond semiconductor thin-film technology.

284

Yield Optimization of Nitrogen Vacancy Centers in Diamond  

E-Print Network [OSTI]

/nmg2870 ………………………………………………………………. 21 3-7 The minimum implantation time to prevent graphitization versus temperature for various doses of 2 MeV nitrogen implantation………… 22 x FIGURE... is feasible and allows removal of most dirt, some amorphous carbon, and graphite on surface without eroding the diamond. The bond strength of diamond also allows heating in vacuum to high temperature up to 1700°C and can be baked in air up to 700°C...

Chen, Jeson

2012-10-19T23:59:59.000Z

285

Analysis of the influence of tool dynamics in diamond turning  

SciTech Connect (OSTI)

This report describes the progress in defining the role of machine and interface dynamics on the surface finish in diamond turning. It contains a review of literature from conventional and diamond machining processes relating tool dynamics, material interactions and tool wear to surface finish. Data from experimental measurements of tool/work piece interface dynamics are presented as well as machine dynamics for the DTM at the Center.

Fawcett, S.C.; Luttrell, D.E.; Keltie, R.F.

1988-12-01T23:59:59.000Z

286

Reevaluation of Type I Diamonds for Infrared and Raman Spectroscopy in High-Pressure Diamond Anvil Cells  

Science Journals Connector (OSTI)

Types Ia, IIa, and IIb diamonds have been compared for their use as anvils in infrared and Raman high-pressure spectroscopy. In the mid-infrared region above 2700 cm?1,...

Wong, P T T; Klug, D D

1983-01-01T23:59:59.000Z

287

XPS analysis of 440C steel surfaces lubricated with perfluoropolyethers under sliding conditions in high vacuum  

SciTech Connect (OSTI)

This work presents the results of the X-Ray Photoelectron Spectroscopy (XPS) analysis of AISI 440C ball surfaces lubricated with perfluoropolyether (PFPE) oils after friction experiments under sliding conditions at high load in air and vacuum environments. The PFPE lubricants tested were Demnum S100, Fomblin Z-25, and Krytox 143AB. It was found that all the PFPE lubricants were degraded by sliding contact causing the formation of inorganic fluorides on the metallic surfaces and a layer of organic decomposition products. KRYTOX 143AB was the least reactive of the three lubricants tested. It was also found that metal fluoride formed at off-scar areas. This suggests the formation of reactive species, such as COF2 or R[sub f]COF, during sliding experiments, which can diffuse through the lubricant film and react with the metallic surfaces away from the contact region. Comparison of reference specimens before sliding with those that had undergone the sliding tests showed that the amount of non-degraded PFPE remaining on the surface of the balls after the sliding experiments was greater than that of the balls without sliding.

Herrera-Fierro, P.; Masuko, M.; Jones, W.R. Jr.; Pepper, S.V.

1994-04-01T23:59:59.000Z

288

Formic acid decomposition on polycrystalline platinum and palladized platinum electrodes  

SciTech Connect (OSTI)

This is a comprehensive study in which a formic acid decomposition reaction is examined as a probe of catalytic properties of polycrystalline platinum and palladized platinum electrodes. The electrode potential varies in a broad range, and the reaction is carried out in perchloric acid and sulfuric acid solutions containing different concentrations of HCOOH. Analytical methods used to access the decomposition reaction are chronoamperometry and cyclic voltammetry. At very short times, the authors prove that only a negligible amount of surface CO is formed, and the CO unaffected decomposition reaction, leading to CO{sub 2} formation, can be interrogated. Surprisingly, the decomposition reaction displays Tafel behavior only in a very narrow potential range. This observation, made with both clean Pt and Pt/Pd electrodes, suggests that water-surface interactions, and/or (bi)sulfate-surface interactions, increase with increasing electrode potential and create a steric/electronic barrier for the decomposition of formic acid (and methanol). The authors therefore offer a pessimistic view about platinum as a universal material for heterogeneous catalysis applications involving rearrangements of organic molecules. Such rearrangements may only be fulfilled with a low electrochemical driving force, at least at room temperature, but at higher potentials, the electrode becomes deactivated due to the unique attributes of the double layer structure on the platinum electrode. The authors have also found that the deceleration of formic acid oxidation (to CO{sub 2}) is primarily due to CO chemisorption only at potentials overlapping with those from the hydrogen adsorption range, or not too positive from this range. At more positive potentials, the decay in formic acid decomposition is neither due to CO formation nor to solution mass transfer limitations. The presence of interfacial CO{sub 2} or adsorption of formic acid and/or formate anion, could account for the decay. Finally, a detailed analysis of kinetic isotherms involved in the two pathways, CO{sub 2} formation and CO chemisorption, is made and the mechanism of formic acid decomposition on platinum is discussed. The electrolyte anion effects involved in formic acid oxidation in HClO{sub 4} and in H{sub 2}SO{sub 4} solutions are also presented.

Lu, G.Q.; Crown, A.; Wieckowski, A.

1999-11-04T23:59:59.000Z

289

Elasticity, strength, and toughness of single crystal silicon carbide, ultrananocrystalline diamond, and hydrogen-free tetrahedral amorphous  

E-Print Network [OSTI]

Elasticity, strength, and toughness of single crystal silicon carbide, ultrananocrystalline diamond carbide 3C-SiC , ultrananocrystalline diamond, and hydrogen-free tetrahedral amorphous carbon

Espinosa, Horacio D.

290

Formation damage studies of lubricants used with drill-in fluids systems on horizontal open-hole wells  

E-Print Network [OSTI]

Tests were conducted to evaluate the effect of lubricants in formation damage. Two types of lubricants were tested along with two types of drill-in fluids. The DIF's tested included a sized-calcium carbonate (SCC) and a sized-salt (SS). Also a set...

Gutierrez, Fernando A

2012-06-07T23:59:59.000Z

291

Identification of tribological research and development needs for lubrication of advanced heat engines  

SciTech Connect (OSTI)

The continuous evolution of higher power density propulsion systems has always fueled the search for materials and lubricants with improved thermal and/or durability characteristics. Tribology of the upper cylinder region is the major technology roadblock in the path of the adiabatic diesel engine which has an energy reduction potential that exceeds that of all other engine development types. This tribology assessment resulted in the following major conclusions: a low friction and a low wear seal between the ring belt and cylinder bore are the most critical tribology functions in the diesel combustion chamber; development of solid lubrication systems will not satisfy the simultaneous low friction and low wear requirements in the upper cylinder area; development of separate upper cylinder liquid lubrication systems offers the most attractive design alternative for meeting the operational goals of future ''minimum cooled'' diesel engines.

Fehrenbacher, L.L.; Levinson, T.M.

1985-09-01T23:59:59.000Z

292

Miscibility, solubility, and viscosity measurements for R-236EA with potential lubricants. Final report, October 1992-March 1995  

SciTech Connect (OSTI)

The report gives results of miscibility, solubility, and viscosity measurements of refrigerant R-236ea with three potential lubricants. The lubricants were a mineral oil, alkylbenzene, and polyol ester, each with a nominal viscosity of 68 cSt. The miscibility tests were performed in a test facility consisting of a series of miniature test cells in a constant-temperature bath. Critical solution temperatures obtained from the miscibility data are presented for each refrigerant/lubricant combination. In addition to miscibility data, both solubility and viscosity data were obtained for R-236ea and the most promising lubricant. For comparison purposes, data were also taken for the existing U.S. Navy shipboard chiller refrigerant and lubricant concentration, namely 4-114 and a naphthenic oil.

Zoz, S.C.; Pate, M.B.

1996-05-01T23:59:59.000Z

293

Development of high temperature liquid lubricants for low-heat rejection heavy duty diesel engines  

SciTech Connect (OSTI)

Objective was to develop a liquid lubricant that will allow advanced diesel engines to operate at top ring reversal temperatures approaching 500 C and lubricant sump temperatures approaching 250 C. Base stock screening showed that aromatic esters and diesters has the lowest deposit level, compared to polyol esters, poly-alpha-olefins, or refined mineral oil of comparable viscosity. Classical aryl and alkyl ZDP antiwear additives are ineffective in reducing wear with aromatic esters; the phosphate ester was a much better antiwear additive, and polyol esters are more amenable to ZDP treatment. Zeolites and clays were evaluated for filtration.

Wiczynski, T.A.; Marolewski, T.A.

1993-03-01T23:59:59.000Z

294

Improved surface adhesion and coverage of perfluoropolyether lubricants following far-UV irradiation  

SciTech Connect (OSTI)

Far-UV treatment of a surface with a thin film of a perfluoropolyether improves adhesion and lowers surface free energy substantially compared to the unirradiated, lubricated surface. With 185-nm radiation, approximately one monolayer can be fixed to surfaces such as amorphous carbon, silica, and gold. These lubricated surfaces become extremely hydrophobic after UV treatment (advancing water contact angle increases about 65{degree} to {ge} 110{degree}) and are not removed by fluorinated solvents. In the absence of far-UV radiation, most perfluoropolyethers show poor adhesion to carbon and are removed easily by rinsing with fluorinated solvents.

Saperstein, D.D. (IBM General Products Div., San Jose, CA (USA)); Lin , L.J. (IBM Research Div., San Jose, CA (USA))

1990-09-01T23:59:59.000Z

295

Electronic structure of polycrystalline Cd metal using {sup 241}Am radioisotope  

SciTech Connect (OSTI)

Electronic structure study of the polycrystalline cadmium metal is reported. The experimental measurement is undertaken on a polycrystalline sheet sample using 59.54 keV radioisotope of {sup 241}Am. These results are compared with the ab initio calculations. The theoretical calculations are performed using linear combination of atomic orbitals (LCAO) method employing the density functional theories (DFT) and Hartree-Fock (HF) and augmented plane wave (APW) methods. The spherically averaged APW and LCAO based theoretical Compton profiles are in good agreement with the experimental measurement however the APW based theoretical calculations show best agreement.

Dhaka, M. S., E-mail: msdhaka75@yahoo.co.in [Department of Physics, University College of Science, M. L. S. University, Udaipur-313001 (India); Sharma, G. [Department of Pure and Applied Physics, University of Kota, Kota-324005 (India); Mishra, M. C. [Department of Physics, R. R. M. Government College, Jhunjhunu-333001 (India); Sharma, B. K. [Department of Physics, University of Rajasthan, Jaipur-302004 (India)

2014-04-24T23:59:59.000Z

296

Mechanical Behavior of Diamond-Sawn Multi-Crystalline Silicon Wafers and its Improvement  

Science Journals Connector (OSTI)

Poor mechanical property is identified as a potential barrier to commercial development of diamond wire sawn multi-crystalline silicon wafers. 3-point bending tests of the diamond-sawn multi-crystalline silico...

Hongchen Meng; Lang Zhou

2014-04-01T23:59:59.000Z

297

E-Print Network 3.0 - amorphous diamond flat Sample Search Results  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

on an interme- diate layer of diamond-like amorphous carbon 9-11,30,35,61, metal carbides 12,14,16,22,23, 25... ,13,72. Nucleation on an intermediate layer of diamond-like...

298

In situ measurement of the bonded film thickness of Z-Tetraol lubricant on magnetic recording media  

SciTech Connect (OSTI)

Currently, the bonded film thickness of perfluoropolyether lubricant on top of magnetic recording media is measured by a two-step process. First, the media disk has to be rinsed thoroughly using a fluorocarbon solvent (for instance, Vetrel) to remove the mobile lubricant. Second, the thickness of the remaining lubricant on the media surface which is regarded as the bonded lubricant thickness is then measured either by Fourier transform infrared spectroscopy (FTIR) or electron spectroscopy for chemical analysis. As the total lubricant thickness approaches single molecular dimension ({approx}10 A), current methods face tremendous challenge on the accuracy and sensitivity of the measurement. We studied the spectral characteristics responding to the lubricant bonding with the carbon overcoat by the time-of-flight secondary ion mass spectra and proposed to use the peak area ratio (C{sub 3}H{sub 2}F/C{sub 3}H{sub 5}O and C{sub 4}H{sub 10}O/C{sub 3}H{sub 6}O{sub 2}) to characterize the bonded Z-Tetraol lubricant that produces a direct bonded lubricant thickness measurement without the need to remove the mobile lubricant with a solvent. After taking the background signal of disks prior to bonding by UV irradiation into account, this method becomes independent of the total lubricant thickness as well as shows good correlation linearity (R{sup 2{approx}}87%) with the current FTIR method for the ratio of C{sub 4}H{sub 10}O/C{sub 3}H{sub 6}O{sub 2}.

Zhu Lei; Li Feng [Material Science Laboratory, Recording Media Operation, Seagate Technology International, 16 Woodlands Loop, Singapore 738340 (Singapore)

2010-10-15T23:59:59.000Z

299

Smaller Footprint Drilling System for Deep and Hard Rock Environments; Feasibility of Ultra-High-Speed Diamond Drilling  

SciTech Connect (OSTI)

The two phase program addresses long-term developments in deep well and hard rock drilling. TerraTek believes that significant improvements in drilling deep hard rock will be obtained by applying ultra-high rotational speeds (greater than 10,000 rpm). The work includes a feasibility of concept research effort aimed at development that will ultimately result in the ability to reliably drill 'faster and deeper' possibly with smaller, more mobile rigs. The principle focus is on demonstration testing of diamond bits rotating at speeds in excess of 10,000 rpm to achieve high rate of penetration (ROP) rock cutting with substantially lower inputs of energy and loads. The significance of the 'ultra-high rotary speed drilling system' is the ability to drill into rock at very low weights on bit and possibly lower energy levels. The drilling and coring industry today does not practice this technology. The highest rotary speed systems in oil field and mining drilling and coring today run less than 10,000 rpm - usually well below 5,000 rpm. This document provides the progress through two phases of the program entitled 'Smaller Footprint Drilling System for Deep and Hard Rock Environments: Feasibility of Ultra-High-Speed Diamond Drilling' for the period starting 30 June 2003 and concluding 31 March 2009. The accomplishments of Phases 1 and 2 are summarized as follows: (1) TerraTek reviewed applicable literature and documentation and convened a project kick-off meeting with Industry Advisors in attendance (see Black and Judzis); (2) TerraTek designed and planned Phase I bench scale experiments (See Black and Judzis). Improvements were made to the loading mechanism and the rotational speed monitoring instrumentation. New drill bit designs were developed to provided a more consistent product with consistent performance. A test matrix for the final core bit testing program was completed; (3) TerraTek concluded small-scale cutting performance tests; (4) Analysis of Phase 1 data indicated that there is decreased specific energy as the rotational speed increases; (5) Technology transfer, as part of Phase 1, was accomplished with technical presentations to the industry (see Judzis, Boucher, McCammon, and Black); (6) TerraTek prepared a design concept for the high speed drilling test stand, which was planned around the proposed high speed mud motor concept. Alternative drives for the test stand were explored; a high speed hydraulic motor concept was finally used; (7) The high speed system was modified to accommodate larger drill bits than originally planned; (8) Prototype mud turbine motors and the high speed test stand were used to drive the drill bits at high speed; (9) Three different rock types were used during the testing: Sierra White granite, Crab Orchard sandstone, and Colton sandstone. The drill bits used included diamond impregnated bits, a polycrystalline diamond compact (PDC) bit, a thermally stable PDC (TSP) bit, and a hybrid TSP and natural diamond bit; and (10) The drill bits were run at rotary speeds up to 5500 rpm and weight on bit (WOB) to 8000 lbf. During Phase 2, the ROP as measured in depth of cut per bit revolution generally increased with increased WOB. The performance was mixed with increased rotary speed, with the depth cut with the impregnated drill bit generally increasing and the TSP and hybrid TSP drill bits generally decreasing. The ROP in ft/hr generally increased with all bits with increased WOB and rotary speed. The mechanical specific energy generally improved (decreased) with increased WOB and was mixed with increased rotary speed.

TerraTek, A Schlumberger Company

2008-12-31T23:59:59.000Z

300

Synchronized B and 13 C Diamond Delta Structures for an Ultimate In-Depth Chemical Characterization  

E-Print Network [OSTI]

of secondary ion mass spectrometry (SIMS) profiles in diamond was achieved by the determination of the depth resolution function (DRF). The measurement of this DRF was performed thanks to isotopic-enriched diamond. Applied to boron delta-doped diamond structures, this analysis has resolved edge widths close to 0.3 nm

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Current Issues and Problems in the Chemical Vapor Deposition of Diamond  

Science Journals Connector (OSTI)

...FOR DIAMOND COATINGS, JOURNAL...TO DIAMOND COATINGS, THIN SOLID...SAVVIDES, N, OPTICAL-CONSTANTS...DIAMOND CERAMIC COATING OF THE FUTURE...AND THEIR APPLICATION AS OVERCOATS ON THIN-FILM MEDIA FOR...EFFECT IN THE CVD GROWTH OF...

Walter A. Yarbrough; Russell Messier

1990-02-09T23:59:59.000Z

302

Atmospheric plasma deposition of diamond-like carbon coatings Angela M. Ladwig a,b,  

E-Print Network [OSTI]

Atmospheric plasma deposition of diamond-like carbon coatings Angela M. Ladwig a,b, , Ronald D Available online xxxx Keywords: Atmospheric pressure plasma Diamond-like carbon deposition DLC PECVD The atmospheric pressure plasma-enhanced chemical vapor deposition of diamond-like carbon (DLC) has been

Hicks, Robert F.

303

Hydrogen Storage in Nano-Phase Diamond at High Temperature and Its Release  

SciTech Connect (OSTI)

The objectives of this proposed research were: 91) Separation and storage of hydrogen on nanophase diamonds. It is expected that the produced hydrogen, which will be in a mixture, can be directed to a nanophase diamond system directly, which will not only store the hydrogen, but also separate it from the gas mixture, and (2) release of the stored hydrogen from the nanophase diamond.

Tushar K Ghosh

2008-10-13T23:59:59.000Z

304

On the determination of single-crystal plasticity parameters by diffraction: optimization of a polycrystalline plasticity model using a genetic algorithm  

Science Journals Connector (OSTI)

A genetic algorithm was used to successfully optimize the work hardening coefficients of a polycrystalline plasticity model.

Skippon, T.

2012-07-14T23:59:59.000Z

305

BACKGROUND REVIEW OF THE BRUSH BERYLLIUM AND DIAMOND MAGNESIUM PLANTS  

Office of Legacy Management (LM)

BACKGROUND REVIEW OF THE BRUSH BERYLLIUM AND DIAMOND MAGNESIUM PLANTS BACKGROUND REVIEW OF THE BRUSH BERYLLIUM AND DIAMOND MAGNESIUM PLANTS IN LUCKEY, OHIO October 27, 1989 Prepared for: U.S. Department of Energy Formerly Utilized Sites Remedial Action Program Prepared by: R.F. Weston/Office of Technical Services BACKGROUND REVIEW OF THE BRUSH BERYLLIUM AND DIAMOND MAGNESIUM PLANTS IN LUCKEY, OHIO INTRODUCTION The Department of Energy (DOE) is conducting a program to identify and examine the radiological conditions at sites used in the early years of nuclear energy development by the U.S. Army Corps of Engineer's Manhattan Engineer District (MED) and the Atomic Energy Commission (AEC). This program, the Formerly Utilized Sites Remedial Action Program (FUSRAP), is administered by the Assistant Secretary for Nuclear Energy through the

306

Is Graphite a Diamonds Best Friend? New Information on Material  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

November 18th, 2003 November 18th, 2003 Is Graphite a Diamond's Best Friend? New Information on Material Transformation Science has yet to achieve the alchemist's dream of turning lead into gold. But a group of re-searchers using the GeoSoilEn-viroCARS (GSECARS) and High-Pressure Collaborative Access Team (HP-CAT) facilities at the Department of Energy's Advanced Photon Source (APS) at Argonne National Laboratory, may have found a way to turn ordinary soft graphite (source of the "lead" found in pencils) into a new, super-hard material that "looks" just like diamond. Using the high-brilliance x-ray beams from the APS, the group discovered that, under extreme pressure, graphite (among the softest of materials and the source of the lead found in pencils) becomes as hard as diamond, the

307

Photonic nano-structures on (111)-oriented diamond  

SciTech Connect (OSTI)

We demonstrate the fabrication of single-crystalline diamond nanopillars on a (111)-oriented chemical vapor deposited diamond substrate. This crystal orientation offers optimal coupling of nitrogen-vacancy (NV) center emission to the nanopillar mode and is thus advantageous over previous approaches. We characterize single native NV centers in these nanopillars and find one of the highest reported saturated fluorescence count rates in single crystalline diamond in excess of 10{sup 6} counts per second. We show that our nano-fabrication procedure conserves the preferential alignment as well as the spin coherence of the NVs in our structures. Our results will enable a new generation of highly sensitive probes for NV magnetometry and pave the way toward photonic crystals with optimal orientation of the NV center's emission dipole.

Neu, Elke; Appel, Patrick; Ganzhorn, Marc; Miguel-Sánchez, Javier; Maletinsky, Patrick, E-mail: patrick.maletinsky@unibas.ch [Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel (Switzerland); Lesik, Margarita; Jacques, Vincent [Laboratoire Aimé Cotton, CNRS, Université Paris-Sud and Ecole Normale Supérieure de Cachan, F-91405 Orsay (France); Mille, Vianney; Tallaire, Alexandre; Achard, Jocelyn [Université Paris 13, Sorbonne Paris Cité, Laboratoire des Sciences des Procédés et des Matériaux (CNRS UPR 3407), F-93430 Villetaneuse (France)

2014-04-14T23:59:59.000Z

308

Capacitively coupled RF diamond-like-carbon reactor  

DOE Patents [OSTI]

A process of coating a non-conductive fiber with diamond-like carbon, including passing a non-conductive fiber between a pair of parallel metal grids within a reaction chamber, introducing a hydrocarbon gas into the reaction chamber, forming a plasma within the reaction chamber for a sufficient period of time whereby diamond-like carbon is formed upon the non-conductive fiber, is provided together with a reactor chamber for deposition of diamond-like carbon upon a non-conductive fiber, including a vacuum chamber, a cathode assembly including a pair of electrically isolated opposingly parallel metal grids spaced apart at a distance of less than about 1 centimeter, an anode, a means of introducing a hydrocarbon gas into said vacuum chamber, and a means of generating a plasma within said vacuum chamber.

Devlin, David James (Los Alamos, NM); Coates, Don Mayo (Santa Fe, NM); Archuleta, Thomas Arthur (Espanola, NM); Barbero, Robert Steven (Santa Cruz, NM)

2000-01-01T23:59:59.000Z

309

Diamond-Silicon Carbide Composite And Method For Preparation Thereof  

DOE Patents [OSTI]

Fully dense, diamond-silicon carbide composites are prepared from ball-milled microcrystalline diamond/amorphous silicon powder mixture. The ball-milled powder is sintered (P=5-8 GPa, T=1400K-2300K) to form composites having high fracture toughness. A composite made at 5 GPa/1673K had a measured fracture toughness of 12 MPa.multidot.m.sup.1/2. By contrast, liquid infiltration of silicon into diamond powder at 5 GPa/1673K produces a composite with higher hardness but lower fracture toughness. X-ray diffraction patterns and Raman spectra indicate that amorphous silicon is partially transformed into nanocrystalline silicon at 5 GPa/873K, and nanocrystalline silicon carbide forms at higher temperatures.

Qian, Jiang (Los Alamos, NM); Zhao, Yusheng (Los Alamos, NM)

2005-09-06T23:59:59.000Z

310

Tribological performance of NFC coatings under oil lubrication[Near Frictionless Carbon  

SciTech Connect (OSTI)

An increase in engine and vehicle efficiency usually requires an increase in the severity of contact at the interfaces of many critical components. Examples of such components include piston rings and cylinder liners in the engine, gears in the transmission and axle, bearings, etc. These components are oil-lubricated and require enhancement of their tribological performance. Argonne National Laboratory (ANL) recently developed a carbon-based coating with very low friction and wear properties. These near-frictionless-carbon (NFC) coatings have potential for application in various engine components for performance enhancement. This paper presents the study of the tribological performance of NFC-coated steel surfaces when lubricated with fully formulated and basestock synthetic oils. The NFC coatings reduced both the friction and wear of lubricated steel surfaces. The effect of the coating was much more pronounced in tests with basestock oil. This suggests that NFC-coated parts may not require heavily formulated lubricant oils to perform satisfactorily in terms of reliability and durability.

Ajayi, O. O.; Alzoubi, M.; Erdemir, A.; Fenske, G. R.; Eryilmaz, O. L.; Zimmerman, S.

2000-01-20T23:59:59.000Z

311

Tribological characteristics of aluminum alloys against steel lubricated by ammonium and imidazolium ionic liquids  

SciTech Connect (OSTI)

Sliding friction and wear characteristics of aluminum alloys against AISI 52100 steel lubricated by ionic liquids (ILs) were investigated at both room and elevated temperatures. The tested aluminum alloys include a commercially pure aluminum Al 1100, a wrought alloy Al 6061-T6511, and a cast alloy Al 319-T6. The lubricating performance of two ILs with the same anion, one ammonium-based [C8H17]3NH.Tf2N and one imidazolium-based C10mim.Tf2N, were compared each other and benchmarked against that of a conventional fully-formulated engine oil. Significant friction (up to 35%) and wear (up to 55%) reductions were achieved by the ammonium IL when lubricating the three aluminum alloys compared to the engine oil. The imidazolium IL performed better than the oil but not as well as the ammonium IL for Al 1100 and 319 alloys. However, accelerated wear was unexpectedly observed for Al 6061 alloy when lubricated by C10mim.Tf2N. Surface chemical analyses implied complex tribochemical reactions between the aluminum surfaces and ILs during the wear testing, which has been demonstrated either beneficial by forming a protective boundary film or detrimental by causing severe tribo-corrosion. The effects of the IL cation structure, aluminum alloy composition, and tribo-testing condition on the friction and wear results have been discussed.

Qu, Jun [ORNL; Blau, Peter Julian [ORNL; Dai, Sheng [ORNL; Luo, Huimin [ORNL; Meyer III, Harry M [ORNL; Truhan, John J. [Caterpillar Inc.

2009-01-01T23:59:59.000Z

312

1989 annual book of ASTM standards. Section 5: Petroleum products, lubricants and fossil fuels  

SciTech Connect (OSTI)

This volume of standards pertains to petroleum products and lubricants and to catalysts. The standards presented include: Standard test method for estimation of net and gross heat of combustion of petroleum fuels; Standard guide for generation and dissipation of static electricity in petroleum fuel systems; and Standard test method for solidification point of petroleum wax.

Not Available

1989-01-01T23:59:59.000Z

313

Surface Engineering to Improve the Durability and Lubricity of Ti-6Al-4V Alloy  

SciTech Connect (OSTI)

Titanium alloys offer high strength, high corrosion resistance, and the opportunity to reduce the weight of heavy vehicle engine components, but they do not perform well as bearing surfaces without further treatments or coatings. This paper explores a series of surface engineering treatments to improve the friction and wear behavior of Ti-6Al-4V alloy under diesel engine oil-lubricated conditions.

Bansal, Dinesh G [ORNL; Eryilmaz, Osman L [Argonne National Laboratory (ANL); Blau, Peter Julian [ORNL

2011-01-01T23:59:59.000Z

314

BERTOZZI,A.L. Lubrication Approximations for Surface Tension Driven Interfaces: Some  

E-Print Network [OSTI]

BERTOZZI,A.L. Lubrication Approximations for Surface Tension Driven Interfaces: Some Open Problems approxi- mation of fluid interfaces driven by surface tension. A number of different physical examples are considered. Free surface flow in which surface tension plays a role in the dynamics of an interface

Ball, John M.

315

Design and testing of a procedure for evaluating fuel-efficient crankcase lubricants  

SciTech Connect (OSTI)

Experiments were conducted to design and evaluate a procedure for evaluating the fuel efficiency characteristics of crankcase lubricants using the driving cycles of the 1975 Federal Test Procedure and the Highway Fuel Economy Test. Most of the test protocol was based on guidelines proposed by the American Society for Testing and Materials. Three crankcase lubricants and five oil supplements, as well as a baseline lubricant, were used in eight 1980 model-year vehicles of identical make. The vehicles were operated at 75/sup 0/F (24/sup 0/C) in closely controlled chassis dynamometer tests designed to detect small changes in fuel efficiency. Results from these tests showed measurable increases in fuel economy of 0 to 6% with the test lubricants when compared to a common SAE 30 grade oil. These results are not definitive because of lack of quantification of mileage accumulation effects. The test protocol did reduce measurement variability greatly; this procedure can be applied to evaluation of fuel-efficient oils using larger test fleets. A good potential exists for improving the fuel economy of the US automotive fleet. Because of the large quantities of petroleum consumed in the automotive sector, this potential savings translates into conserving a very significant quantity of petroleum.

Naman, T.M.

1981-04-01T23:59:59.000Z

316

Honeywell launches PVC lubricants & anti-counterfeiting technology; boosts additives R&D  

Science Journals Connector (OSTI)

Honeywell Specialty Additives, part of Honeywell International, has recently commercialized a range of high-performance speciality lubricants for PVC processing in Europe. The company says that the new products provide PVC producers with a viable solution as lead formulations are phased out in Europe.

2008-01-01T23:59:59.000Z

317

High-performance lubricants from Honeywell certified for PVC water pipe formulations  

Science Journals Connector (OSTI)

Honeywell Specialty Materials reports that its Rheochem® line of high-performance lubricants (HPLs) has received certifications from independent, not-for-profit organization NSF International and the Plastics Pipe Institute for use in PVC water pipe formulations. The certifications indicate that the \\{HPLs\\} are safe and effective for use in plastic pipes that carry water throughout homes and municipalities.

2009-01-01T23:59:59.000Z

318

Alkane Contamination Effects on PFPE Lubricant Bonding to a-CHx Overcoats  

E-Print Network [OSTI]

by a small recording head that flies over the surface of the disk as it spins. A 50-100 Ã? thick hydrogenated of the amorphous carbon overcoat.1-3 The recording head flies over the disk surface and lubricant film on a layer hard disk drives promote increased outgassing from drive components and thus can adversely influence

Gellman, Andrew J.

319

Techno-economic study of re-refining waste lubricating oils in the Arabian Gulf countries  

Science Journals Connector (OSTI)

Waste oil reclaimation by re-refining is a promising process for recycling valuable polutant waste. In Arabian Gulf countries, a limited volume of waste oil is recycled. A technical and economical evaluation of some reclaimation methods to produce lubricating oil has been conducted.

M.I. Al-Ahmad; I.S. Al-Mutaz

1991-01-01T23:59:59.000Z

320

THE CHALLENGE IN FINDING LONG-TERM LUBRICATION solutions for wind turbines  

E-Print Network [OSTI]

THE CHALLENGE IN FINDING LONG-TERM LUBRICATION solutions for wind turbines is well known wind turbines in a farm in order to improve their longevity. In a previous TLT article, research- ers used a technique known as Simula- tor for Offshore /Onshore Wind Farm Applications to examine

Chiao, Jung-Chih

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

The influence of lubrication on the energy cost of pushing a mine car  

Science Journals Connector (OSTI)

The oxygen intakes of 16 well-trained Bantu mine recruits were studied while they pushed a mine car at a constant speed of 2 miles p. h. The car had dry or partially lubricated axles and was pushed with loads ...

C. G. Williams; J. H. Viljoen…

1966-01-01T23:59:59.000Z

322

On the formation of solid state crystallized intrinsic polycrystalline germanium thin films  

E-Print Network [OSTI]

Meng, Zhonghe Jin, and Gururaj A. Bhat Department of Electrical and Electronic Engineering, The Hong Department of Electrical and Electronic Engineering, The Hong Kong University of Science and Technology. Large grain p-type polycrystalline germanium with a Hall effect hole mobility of greater than 300 cm2 Vs

323

Modification of polycrystalline silicon as efficient anode for active-matrix organic light-emitting diodes  

E-Print Network [OSTI]

Modification of polycrystalline silicon as efficient anode for active- matrix organic light silicon (p-Si) on the performance of p-Si anode OLEDs have been studied. UV-ozone treatment of p. By depositing ultra-thin high work function metal oxides, such as V2O5 and MoO3, on p-Si anode, the performance

324

Vanadium pentoxide modified polycrystalline silicon anode for active-matrix organic light-emitting diodes  

E-Print Network [OSTI]

Vanadium pentoxide modified polycrystalline silicon anode for active-matrix organic light to be an efficient anode for organic light-emitting diode OLED X. L. Zhu, J. X. Sun, H. J. Peng, Z. G. Meng, M. Wong an ultrathin vanadium pentoxide V2O5 layer on the p-Si anode, the performance of the OLED can be greatly

325

LBIC ANALYSIS OF THIN-FILM POLYCRYSTALLINE SOLAR CELLS James R. Sites and Timothy J. Nagle  

E-Print Network [OSTI]

LBIC ANALYSIS OF THIN-FILM POLYCRYSTALLINE SOLAR CELLS James R. Sites and Timothy J. Nagle Physics response map, was developed and used to map defects in thin-film solar cells [4]. Improvements to the two) measurements are providing a direct link between the spatial non-uniformities inherent in thin-film

Sites, James R.

326

A virtual environment for the interrogation of 3D polycrystalline microstructure including  

E-Print Network [OSTI]

A virtual environment for the interrogation of 3D polycrystalline microstructure including grain of Mechanical and Aerospace Engineering, 101 Frank H.T. Rhodes Hall, Cornell University, Ithaca, NY 14853. The macroscopic response is obtained through volume- averaging laws. A constitutive framework for elasto

Zabaras, Nicholas J.

327

1. INTRODUCTION Polycrystalline CdTe thin films solar cells have shown long  

E-Print Network [OSTI]

to the solar panel that can be adapted to any kind of shape and is easy to deploy in space. We have developed1. INTRODUCTION Polycrystalline CdTe thin films solar cells have shown long term stable performance for the solar cell, therefore high specific power (ratio of out- put power to the weight) solar cells

Romeo, Alessandro

328

A study on lubricant oil supply for positive-displacement expanders in small-scale organic Rankine cycles  

Science Journals Connector (OSTI)

Abstract Positive-displacement expanders, which are widely used in small-scale \\{ORCs\\} (Organic Rankine Cycles), need reliable LOS (Lubricant Oil Supply) to get well lubrication and sealing. In the present paper, the characteristics of two traditional LOS schemes are examined. Moreover, a modified one is proposed. Analyses of those elements that lead to work loss of lubricant oil supply have been carried out for all the three LOS schemes. The work loss of lubricant oil supply, which is caused by the employment of lubricant oil pumps, pressure drop in lubricant oil separator and other components contributing to work loss, is evaluated by a definition of WLLS (Work Loss Factor of Lubrication Oil Supply). Based on the thermodynamic model of ORC established, the calculation methods of WLLS are presented. Through analyses of LOS schemes and calculation of WLLS in two typical ORCs, it was found that the traditional LOS schemes either can not work reliably, or might cause up to 11.5% and 9.5% power decrease. The values can be reduced by half in the proposed LOS scheme, which can also work reliably. Accompanied with the advantages, the defects of the new scheme were also investigated.

Biao Lei; Yu-Ting Wu; Wei Wang; Jing-Fu Wang; Chong-Fang Ma

2014-01-01T23:59:59.000Z

329

Smooth diamond films as low friction, long wear surfaces  

DOE Patents [OSTI]

An article and method of manufacture of a nanocrystalline diamond film. The nanocrystalline film is prepared by forming a carbonaceous vapor, providing an inert gas containing gas stream and combining the gas stream with the carbonaceous containing vapor. A plasma of the combined vapor and gas stream is formed in a chamber and fragmented carbon species are deposited onto a substrate to form the nanocrystalline diamond film having a root mean square flatness of about 50 nm deviation from flatness in the as deposited state.

Gruen, Dieter M. (Downers Grove, IL); Krauss, Alan R. (Naperville, IL); Erdemir, Ali (Naperville, IL); Bindal, Cuma (Woodridge, IL); Zuiker, Christopher D. (LaGrange, IL)

1999-01-01T23:59:59.000Z

330

Diamond turning of Si and Ge single crystals  

SciTech Connect (OSTI)

Single-point diamond turning studies have been completed on Si and Ge crystals. A new process model was developed for diamond turning which is based on a critical depth of cut for plastic flow-to-brittle fracture transitions. This concept, when combined with the actual machining geometry for single-point turning, predicts that {open_quotes}ductile{close_quotes} machining is a combined action of plasticity and fracture. Interrupted cutting experiments also provide a meant to directly measure the critical depth parameter for given machining conditions.

Blake, P.; Scattergood, R.O.

1988-12-01T23:59:59.000Z

331

Polycrystal diamond growth in a microwave plasma torch  

SciTech Connect (OSTI)

Diamond films of different structures were deposited on quartz, WC-Co, and molybdenum substrates in a microwave plasma torch discharge in an argon-hydrogen-methane gas mixture in a sealed chamber at pressures close to atmospheric by using the chemical vapor deposition technique. Images of diamond polycrystal films and separate crystals, as well as results of Raman spectroscopy, are presented. The spectra of optical plasma radiation recorded during film deposition demonstrate the presence of intense H{sub {alpha}} hydrogen and C{sub 2} radical bands known as Swan bands.

Sergeichev, K. F.; Lukina, N. A.; Bolshakov, A. P.; Ralchenko, V. G.; Arutyunyan, N. R.; Vlasov, I. I. [Russian Academy of Sciences, Prokhorov Institute of General Physics (Russian Federation)

2010-12-15T23:59:59.000Z

332

Controlled incorporation of mid-to-high Z transition metals in CVD diamond  

SciTech Connect (OSTI)

We report on a general method to fabricate transition metal related defects in diamond. Controlled incorporation of Mo and W in synthetic CVD diamond was achieved by adding volatile metal precursors to the diamond chemical vapor deposition (CVD) growth process. Effects of deposition temperature, grain structure and precursor exposure on the doping level were systematically studied, and doping levels of up to 0.25 at.% have been achieved. The metal atoms are uniformly distributed throughout the diamond grains without any indication of inclusion formation. These results are discussed in context of the kinetically controlled growth process of CVD diamond.

Biener, M M; Biener, J; Kucheyev, S O; Wang, Y M; El-Dasher, B; Teslich, N E; Hamza, A V; Obloh, H; Mueller-Sebert, W; Wolfer, M; Fuchs, T; Grimm, M; Kriele, A; Wild, C

2010-01-08T23:59:59.000Z

333

The chemistry of halogens on diamond: effects on growth and electron emission  

SciTech Connect (OSTI)

Diamond growth using halogenated precursors was studied in several diamond growth reactors. In a conventionao plasma reactor, diamond growth using the following gas mixtures was studied: CF{sub 4}/H{sub 2}, CH{sub 4}/H{sub 2}, CH{sub 3}F/H{sub 2}, and CH{sub 3}CL/H{sub 2}. Both the diamond growth measurements demonstrated ineffective transport of halogen radicals to the diamond surface during the growth process. In order to transport radical halogen species to the diamond surface during growth, a flow-tube reactor was constructed which minimized gas phase reactions. Also, the flow-tube reactor enabled pulsed gs transport to the diamond surface by fast-acting valves. Molecular beam mass spectroscopy was used to find condition which resulted in atomic hydrogen and/or atomic fluorine transport to the growing diamond surface. Although such conditions were found, they required very low pressures (0.5 Torr and below); these low pressures produce radical fluxes which are too low to sustain a reasonable diamond growth rate. The sequential reactor at Stanford was modified to add a halogen-growth step to the conventinoal atomic hydrogen/atomic carbon diamond growth cycle. Since the atomic fluorine, hydrogen and carbon environments are independent in the sequential reactor, the effect of fluorine on diamond growth could be studied independently of gas phase reactions. Although the diamond growth rate was increased by the use of fluorine, the film quality was seen to deteriorate as well as the substrate surface. Moreover, materials incompatibilities with fluorine significantly limited the use of fluorine in this reactor. A diamond growth model incorporating both gas phase and surface reactions was developed for the halocarbon system concurrent with the film growth efforts. In this report, we review the results of the growth experiments, the modeling, and additional experiments done to understand fluorine with diamond surfaces.

Hsu, W.L.; Pan, L.S.; Brown, L.A. [Sandia National Labs., Livermore, CA (United States)] [and others

1997-02-01T23:59:59.000Z

334

LEFT The electron gun at the Diamond Synchrotron in  

E-Print Network [OSTI]

LEFT The electron gun at the Diamond Synchrotron in Didcot, Oxfordshire WWW.HOWITWORKSDAILY.COM026" Electron guns are a very versatile electrical component. They are essential to a number of devices, from 3D currents. When installed in an electrical device's vacuum tube, the gun turns electrons and ions

Crowther, Paul

335

Single Crystal Diamond Beam Position Monitors with Radiofrequency Electronic Readout  

SciTech Connect (OSTI)

Over the energy range 5{approx}30 keV a suitably contacted, thin ({approx}100 {mu}m) diamond plate can be operated in situ as a continuous monitor of X-ray beam intensity and position as the diamond absorbs only a small percentage of the incident beam. Single crystal diamond is a completely homogeneous material showing fast (ns), spatially uniform signal response and negligible (diamond beam position monitors of simple quadrant electrode designs with metal contacts, operated using wideband electronic readout corresponding to the RF accelerator frequency. The instrumentation for these monitors must cover a large range of operating conditions: different beam sizes, fluxes, energies and time structure corresponding to the synchrotron fill patterns. Sophisticated new RF sampling electronics can satisfy most requirements: using a modified Libera Brilliance readout system, we measured the center of gravity position of a 25 {mu}m beam at the DORIS III F4 beam line at a rate of 130 Msample/s with narrowband filtering of a few MHz bandwidth. Digitally averaging the signal further provided a spatial resolution {approx}20 nm.

Solar, B.; Graafsma, H.; Potdevin, G.; Trunk, U. [Hasylab, Deutsches Elektronen Synchroton, Hamburg (Germany); Morse, J.; Salome, M. [Instrumentation Services and Development Division, European Synchroton Radiation Facility, Grenoble (France)

2010-06-23T23:59:59.000Z

336

Diamond Lattice Model of Semicrystalline Polyethylene in the Amorphous Region  

E-Print Network [OSTI]

Diamond Lattice Model of Semicrystalline Polyethylene in the Amorphous Region Zhong­Hui Duan Abstract The statistics of polyethylene chains in the amorphous region between two crystallites have been as models of the chain molecules in the amorphous region of semicrystalline polyethylene, both

Aluffi, Paolo

337

An UV-range photodetector based on a diamond photosensor  

Science Journals Connector (OSTI)

A new UV-range photodetector based on a diamond one-element photosensor has been designed, manufactured and studied. The photodetector possesses the operating range between 180 and 225 nm (the maximum is attained around 220 nm), and the threshold of ...

V. S. Feshchenko; A. A. Altukhov; S. A. L'Vov; Yu. A. Mityagin; V. A. Shepelev

2013-02-01T23:59:59.000Z

338

New route to the fabrication of nanocrystalline diamond films  

SciTech Connect (OSTI)

Nanocrystalline diamond (NCD) thin films offer applications in various fields, but the existing synthetic approaches are cumbersome and destructive. A major breakthrough has been achieved by our group in the direction of a non-destructive, scalable, and economic process of NCD thin-film fabrication. Here, we report a cheap precursor for the growth of nanocrystalline diamond in the form of paraffin wax. We show that NCD thin films can be fabricated on a copper support by using simple, commonplace paraffin wax under reaction conditions of Hot Filament Chemical Vapor Deposition (HFCVD). Surprisingly, even the presence of any catalyst or seeding that has been conventionally used in the state-of-the-art is not required. The structure of the obtained films was analyzed by scanning electron microscopy and transmission electron microscopy. Raman spectroscopy and electron energy-loss spectroscopy recorded at the carbon K-edge region confirm the presence of nanocrystalline diamond. The process is a significant step towards cost-effective and non-cumbersome fabrication of nanocrystalline diamond thin films for commercial production.

Varshney, Deepak, E-mail: deepvar20@gmail.com; Morell, Gerardo [Institute of Functional Nanomaterials, University of Puerto Rico, San Juan, Puerto Rico 00931, Puerto Rico (United States); Department of Physics, University of Puerto Rico, San Juan, PO Box 70377, Puerto Rico 00936, Puerto Rico (United States); Palomino, Javier; Resto, Oscar [Department of Physics, University of Puerto Rico, San Juan, PO Box 70377, Puerto Rico 00936, Puerto Rico (United States); Gil, Jennifer [Department of Chemistry, University of Puerto Rico, San Juan, Puerto Rico 00936, Puerto Rico (United States); Weiner, Brad R. [Institute of Functional Nanomaterials, University of Puerto Rico, San Juan, Puerto Rico 00931, Puerto Rico (United States); Department of Chemistry, University of Puerto Rico, San Juan, Puerto Rico 00936, Puerto Rico (United States)

2014-02-07T23:59:59.000Z

339

A review of lubrication and preformance issues in refrigeration systems using an HFC (R-134a) refrigerant  

SciTech Connect (OSTI)

It has been considered critical for refrigerant and compressor lubricant to be miscible with each other over part of the range of operating conditions of refrigerant systems. Adequate miscibility, many believe, provides oil return to the compressor. Presently, synthetic polyol esters have been selected for use with HFC refrigerants, such as R-134a, which are considered appropriate alternatives to CFCs. The authors will review the mechanical issues in miscible vs non-miscible naphthenic hydrocarbon oil-based lubricants. Extensive lab, test stand and cabinet testing has been conducted and data will be presented which show responsible and predictable performance based on the chemical and physical properties of the lubricant and refrigerant. Many non-miscible systems show satisfactory performance with the proper selection of lubricant, additives and mechanical configuration. 3 refs., 3 figs., 5 tabs.

Reyes-Gavilan, J.; Eckard, A.; Flak, T.; Tritak, T. [Witco Corporation, Oakland, NJ (United States)

1996-04-01T23:59:59.000Z

340

Controlled Experiments on the Effects of Lubricant/Additive (Low-Ash, Ashless) Characteristics on DPF Degradation  

Broader source: Energy.gov [DOE]

Effects of lubricant additive chemistries and exhaust conditions on ash properties affecting diesel particulate filter performance. Comparison of ash characteristics such as packing density and elemental composition in field and laboratory aged DPFs.

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Study on Influence of Cylinder Liner Surface Texture on Lubrication Performance for Cylinder Liner–Piston Ring Components  

Science Journals Connector (OSTI)

A marine diesel engine, where the cylinder liner–piston ... rubbing pairs, is the heart of a marine system. Studying the lubrication characteristics of the ... for rational design of the CLPR to reduce wear and p...

Zhiwei Guo; Chengqing Yuan; Peng Liu; Zhongxiao Peng; Xinping Yan

2013-07-01T23:59:59.000Z

342

Air Entrapment in Nanometer-Thick Lubricant Films and its Effect on Slider Flying Height in a Hard Disk Drive  

Science Journals Connector (OSTI)

Experimental data are presented, showing that the flying height of a slider in a hard disk drive can be altered by the chemical ... of the molecularly-thin lubricant film on the disk surface. It is suggested that...

B. Marchon; X. C. Guo; S. Canchi; R. H. Wang; N. Supper; J. Burns…

2012-09-01T23:59:59.000Z

343

Thin film gas lubrication characteristics of flying head slider bearings over patterned media in hard disk drives  

Science Journals Connector (OSTI)

...? This paper describes the effects of moving patterned disk surfaces on thin film gas lubrication characteristics for flying head slider bearings in magnetic hard disk drives. In order to perform the most real...

N. Tagawa; A. Mori

2003-05-01T23:59:59.000Z

344

Advanced Petroleum-Based Fuels -- Diesel Emissions Control Project (APBF-DEC): Lubricants Project, Phase 2 Final Report  

SciTech Connect (OSTI)

This report summarizes the results of the second phase of a lubricants project, which investigated the impact of engine oil formulation on diesel vehicle emissions and the performance of a nitrogen oxide adsorber catalyst (NAC).

Not Available

2006-06-01T23:59:59.000Z

345

Experimental Studies on Visco-plastic Lubrication of Visco-elastic Fluid: Interfacial Instability and Geometry Effect  

E-Print Network [OSTI]

of application in industry, such as in co- extrusion processes and lubricated pipelining. In the case of a duct to establish the base multi-layer flows at all, using a visco-elastic fluid (Poly Ethylene Oxide solution

Ishii, Hitoshi

346

Temperature–friction characteristics of used lubricant from two-stroke cross-head marine diesel engines  

Science Journals Connector (OSTI)

It is now quite apparent that, in a two-stroke, cross-head marine diesel engine, the lubrication regime in the contact between piston ring and cylinder liner at the top dead centre (TDC) is of a boundary type. Therefore, the tribological performance of a system to simulate the real contact should be assessed under conditions closely resembling the operating engine environment. In the reality of engine operation, the lubricant is often contaminated by fuel and products of combustion, hence the need to study the temperature–friction characteristics of this actual lubricant under the conditions of boundary lubrication. In this paper, an oil taken from the drainage system of the engine was used. A five times heating and cooling test methodology was employed to assess tribological performance of a model contact lubricated with the actual oil. The model contact was formed by a pin sliding over a plate both made of materials used in two-stroke, cross-head marine diesel engines. Experiments showed that the general trend in temperature–friction characteristics of the used oil is similar to that of a new oil. However, the level of friction in the contact lubricated with an used oil is significantly higher than that for a new oil.

T.A Stolarski; Q Zhou

2002-01-01T23:59:59.000Z

347

Fatigue failure in thin-film polycrystalline silicon is due to subcritical cracking within the oxide layer  

E-Print Network [OSTI]

Fatigue failure in thin-film polycrystalline silicon is due to subcritical cracking within with stress-induced surface oxide thicken- ing and moisture-assisted subcritical cracking in the amor- phous

Ritchie, Robert

348

Growth of Large-Area Single- and Bi-Layer Graphene by Controlled Carbon Precipitation on Polycrystalline Ni Surfaces  

E-Print Network [OSTI]

We report graphene films composed mostly of one or two layers of graphene grown by controlled carbon precipitation on the surface of polycrystalline Ni thin films during atmospheric chemical vapor deposition (CVD). Controlling ...

Reina, Alfonso

2009-01-01T23:59:59.000Z

349

Advanced polycrystalline silicon thin film solar cells using high rate plasma enhanced chemical vapour deposited amorphous silicon on textured glass.  

E-Print Network [OSTI]

??Solid phase crystallized polycrystalline silicon (poly-Si) thin-film solar cell on glass is an emerging Photovoltaics (PV) technology combining the robustness of crystalline Si material with… (more)

Jin, Guangyao

2010-01-01T23:59:59.000Z

350

Solar cells utilizing pulsed-energy crystallized microcrystalline/polycrystalline silicon  

DOE Patents [OSTI]

A process for producing multi-terminal devices such as solar cells wherein a pulsed high energy source is used to melt and crystallize amorphous silicon deposited on a substrate which is intolerant to high processing temperatures, whereby the amorphous silicon is converted into a microcrystalline/polycrystalline phase. Dopant and hydrogenation can be added during the fabrication process which provides for fabrication of extremely planar, ultra shallow contacts which results in reduction of non-current collecting contact volume. The use of the pulsed energy beams results in the ability to fabricate high efficiency microcrystalline/polycrystalline solar cells on the so-called low-temperature, inexpensive plastic substrates which are intolerant to high processing temperatures.

Kaschmitter, J.L.; Sigmon, T.W.

1995-10-10T23:59:59.000Z

351

Solar cells utilizing pulsed-energy crystallized microcrystalline/polycrystalline silicon  

DOE Patents [OSTI]

A process for producing multi-terminal devices such as solar cells wherein a pulsed high energy source is used to melt and crystallize amorphous silicon deposited on a substrate which is intolerant to high processing temperatures, whereby to amorphous silicon is converted into a microcrystalline/polycrystalline phase. Dopant and hydrogenization can be added during the fabrication process which provides for fabrication of extremely planar, ultra shallow contacts which results in reduction of non-current collecting contact volume. The use of the pulsed energy beams results in the ability to fabricate high efficiency microcrystalline/polycrystalline solar cells on the so-called low-temperature, inexpensive plastic substrates which are intolerant to high processing temperatures.

Kaschmitter, James L. (Pleasanton, CA); Sigmon, Thomas W. (Beaverton, OR)

1995-01-01T23:59:59.000Z

352

Boron- and phosphorus-doped polycrystalline silicon thin films prepared by silver-induced layer exchange  

SciTech Connect (OSTI)

Intentional boron and phosphorus doping of polycrystalline silicon thin films on glass prepared by the silver-induced layer exchange is presented. A silver/(titanium) oxide/amorphous silicon stack is annealed at temperatures below the eutectic temperature of the Ag/Si system, leading to a complete layer exchange and simultaneous crystallization of the amorphous silicon. Intentional doping of the amorphous silicon prior to the exchange process results in boron- or phosphorus-doped polycrystalline silicon. Hall effect measurements show carrier concentrations between 2 Multiplication-Sign 10{sup 17} cm{sup -3} and 3 Multiplication-Sign 10{sup 20} cm{sup -3} for phosphorus and 4 Multiplication-Sign 10{sup 18} cm{sup -3} to 3 Multiplication-Sign 10{sup 19} cm{sup -3} for boron-doped layers, with carrier mobilities up to 90 cm{sup 2}/V s.

Antesberger, T.; Wassner, T. A.; Jaeger, C.; Algasinger, M.; Kashani, M.; Scholz, M.; Matich, S.; Stutzmann, M. [Walter Schottky Institut and Physics Department, Technische Universitaet Muenchen, Am Coulombwall 4, 85748 Garching (Germany)] [Walter Schottky Institut and Physics Department, Technische Universitaet Muenchen, Am Coulombwall 4, 85748 Garching (Germany)

2013-05-27T23:59:59.000Z

353

Photonic-band-gap effects in two-dimensional polycrystalline and amorphous structures  

SciTech Connect (OSTI)

We study numerically the density of optical states (DOS) in two-dimensional photonic structures with short-range positional order and observe a transition from polycrystalline to amorphous photonic systems. In polycrystals, photonic band gaps (PBGs) are formed within individual domains, which leads to a depletion of the DOS similar to that in periodic structures. In amorphous photonic media, the domain sizes are too small to form PBGs, thus the depletion of the DOS is weakened significantly. The critical domain size that separates the polycrystalline and amorphous regimes is determined by the attenuation length of Bragg scattering, which depends not only on the degree of positional order but also the refractive-index contrast of the photonic material. Even with relatively low-refractive-index contrast, we find that modest short-range positional order in photonic structures enhances light confinement via collective scattering and interference.

Yang, Jin-Kyu; Noh, Heeso; Liew, Seng-Fatt [Department of Applied Physics, Yale University, New Haven, Connecticut 06520-8482 (United States); Schreck, Carl [Department of Physics, Yale University, New Haven, Connecticut 06520-8120 (United States); Guy, Mikhael I. [Science and Research Software Core, Yale University, New Haven, Connecticut 06520-8286 (United States); O'Hern, Corey S. [Department of Mechanical Engineering and Materials Science, Yale University, New Haven, Connecticut 06520-8286 (United States); Department of Physics, Yale University, New Haven, Connecticut 06520-8120 (United States); Cao, Hui [Department of Applied Physics, Yale University, New Haven, Connecticut 06520-8482 (United States); Department of Physics, Yale University, New Haven, Connecticut 06520-8120 (United States)

2010-11-15T23:59:59.000Z

354

Enhancement of induced V polarization due to rough interfaces in polycrystalline V/Fe/V trilayers  

SciTech Connect (OSTI)

The effect of interface roughness on the induced polarization of V in polycrystalline V/Fe/V trilayers was investigated with x-ray magnetic circular dichroism, x-ray resonant magnetic scattering, and polarized neutron reflectometry. Trilayer samples were sputter deposited onto Si substrates at room temperature to minimize interdiffusion. The films were polycrystalline and exhibited an average 0.5 nm root-mean-square interfacial roughness at the Fe/V interfaces. The induced polarization found in V was constrained to the Fe/V interface extending approximately up to 2-3 monolayers into the V and exhibited antiferromagnetic alignment to the Fe layer. A magnetic moment for V ranging between -0.46 and -0.86 {micro}{sub B}/V atom is consistent with the neutron and resonant x-ray data. Notably, this value for structurally rough interfaces is significantly larger than that reported for samples with atomically flat Fe/V interfaces.

Clavero, C.; Sanchez-Hanke, C.; Skuza, R.; Choi,Y.; Loloee,R.; Zhernenkov, M.; Fitzsimmons, M.R.; Lukaszew, R.A

2009-07-20T23:59:59.000Z

355

Lubricant return comparison of naphthenic and polyol ester oils in R-134a household refrigeration applications  

SciTech Connect (OSTI)

This paper presents mineral oils and polyol esters as possible lubricant options for domestic refrigeration applications employing R-134a as the heat exchange fluid. A performance comparison, based on data presented, is made between the mineral oils and polyol esters evaluated. To more closely examine lubricant return with N-70 and R-134a and ensure that the oil is not contributing to any deterioration in efficiency due to its accumulation in evaporators, a special test unit was designed with a difficult oil return configuration and its performance carefully monitored. Oil return with a hydrofluorocarbon-miscible polyol ester, R-133-O was also evaluated in this setup and its performance results compared to those obtained with the naphthenic refrigeration oil.

Reyes-Gavilan, J.L.; Flak, G.T.; Tritcak, T.R. [Witco Corp., Oakland, NJ (United States)

1996-12-31T23:59:59.000Z

356

Ab initio calculations of various protonation sites in perfluorodiethyl ether: Models for high temperature lubricant decomposition?  

SciTech Connect (OSTI)

Although perfluoropolyether (PFPE) lubricants have found successful application in spacecraft mechanisms and computer hard drives, there eventual breakdown is irksome, and the mechanism of decomposition is the subject of much scrutiny. However, very little notice is taken of the monomer ethers on which the polymer lubricants are based. Recently, concerted studies of the Lewis base properties of various fluorinated ethers have been performed, both from an experimental and a theoretical viewpoint. As an extension of the theoretical work, this study presents ab initio theoretical consideration of the multiple potential basic sites within perfluorodiethyl ether, (CF{sub 3}CF{sub 2}){sub 2}O, by way of the proton affinity of the molecule at various possible protonation sites (i.e., oxygen and fluorine atoms). The results indicate that although protonation at the oxygen is more energetically favored, protonation at the fluorine is not much higher in energy and provides for formation of an excellent leaving group, HF.

Ball, D.W. [Cleveland State Univ., OH (United States). Dept. of Chemistry

1995-04-01T23:59:59.000Z

357

Tribocharging phenomena in hard disk amorphous carbon coatings with and without perfluoropolyether lubricants  

SciTech Connect (OSTI)

Scanning polarization force microscopy was used to study changes in surface potential (tribocharging) caused by the contact between a tungsten carbide tip and the amorphous carbon coating of a hard disk, both when bare and when covered with Zdol-TX lubricant. The surface potential change produced by tip contact decays with time at a rate that is strongly dependent on lubricant coverage and on the presence of oxygen and water vapor in the environment. Two different charging mechanisms are proposed. One involves chemical modification of the surface by removal of oxygen bound to the surface. This gives rise to a potential change that decays with time. Another mechanism involves trapping of charge in states within the energy gap of the insulating carbon film. The potential change due to this trapped charge does not decay over periods much greater than 1 h.

van den Oetelaar, R. J. A.; Xu, L.; Ogletree, D. F.; Salmeron, M.; Tang, H.; Gui, J.

2001-04-01T23:59:59.000Z

358

Tribocharging phenomena in hard disk amorphous carbon coatings with and without perfluoropolyether lubricants  

SciTech Connect (OSTI)

Scanning polarization force microscopy was used to study changes in surface potential (tribocharging) caused by the contact between a tungsten carbide tip and the amorphous carbon coating of a hard disk,both when bare and when covered with Zdol-TX lubricant. The surface potential change produced by tip contact decays with time at a rate that is strongly dependent on lubricant coverage, and on the presence of oxygen and water vapor in the environment. Two different charging mechanisms are proposed. One involves chemical modification of the surface by removal of oxygen bound to the surface. This gives rise to a potential change that decays with time. Another mechanism involves trapping of charge in states within the energy gap of the insulating carbon film. The potential change due to this trapped charge does not decay over periods much greater than 1 hour.

van den Oetelaar, Ronald J.A.; Xu, Lei; Ogletree, D. Frank; Salmeron, Miquel; Tang, Hung; Gui, Jing

2000-08-01T23:59:59.000Z

359

Nanoscale retention-loss dynamics of polycrystalline PbTiO{sub 3} nanotubes.  

SciTech Connect (OSTI)

We observed the nanoscale retention dynamics of polycrystalline PbTiO{sub 3} nanotubes using piezoresponse force microscopy. We found that the retention loss of the nanodot domains on the nanotubes showed the stretched exponential relaxation behaviors with stretched exponential factor n being less than 1 (0.523 and 0.692), which are similar to the thin films. In addition, the nanodot domains showed a diverse relaxation time constant {tau} due to different remnant polarization of each dot domains.

Choi, H.; Kim, Y.; Hong, S.; Sung, T.-H.; Shin, H.; No, K. (Materials Science Division); (Korea Advanced Inst. of Science and Technology); (Hanyang Univ.); (Kookmin Univ.)

2011-07-01T23:59:59.000Z

360

Thermal oxidation of polycrystalline and single crystalline aluminum nitride wafers (Prop 2003-054)  

SciTech Connect (OSTI)

Two types of aluminum nitride (AlN) samples were oxidized in flowing oxygen between 900 C and 1150 C for up to 6 h - highly (0001) textured polycrystalline AlN wafers and low defect density AlN single crystals. The N-face consistently oxidized at a faster rate than the Al-face. At 900 C and 1000 C after 6 h, the oxide was 15% thicker on the N-face than on the Al-face of polycrystalline AlN. At 1100 C and 1150 C, the oxide was only 5% thicker on the N-face, as the rate-limiting step changed from kinetically-controlled to diffusion-controlled with the oxide thickness. A linear parabolic model was established for the thermal oxidation of polycrystalline AlN on both the Al- and N-face. Transmission electron microscopy (TEM) confirmed the formation of a thicker crystalline oxide film on the N-face than on the Al-face, and established the crystallographic relationship between the oxide film and substrate. The oxidation of high-quality AlN single crystals resulted in a more uniform colored oxide layer compared to polycrystalline AlN. The aluminum oxide layer was crystalline with a rough AlN/oxide interface. The orientation relationship between AlN and Al{sub 2}O{sub 3} was (0001) AlN//(10{bar 1}0) Al{sub 2}O{sub 3} and (1{bar 1}00) AlN//(01{bar 1}2) Al{sub 2}O{sub 3}.

Speakman, Scott A [ORNL; Gu, Z [Kansas State University; Edgar, J H [Kansas State University; Blom, Douglas Allen [ORNL; Perrin, J [Kansas State University; Chaudhuri, J [Kansas State University

2006-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

Constitutive model of creep in polycrystalline halite based on workhardening and recovery  

SciTech Connect (OSTI)

A multimechanism constitutive model of creep has been developed which incorporates the workhardening and recovery transient creep behavior. This model has been applied to the creep of polycrystalline halite. The specific application of the model is in the calculation of the closure of underground rooms in layered salt deposits. Through the use of finite element calculations, this model, with appropriate laboratory material parameters and a Tresca flow potential, has predicted the measured closure of a number of large in situ experimental rooms.

Munson, D.E.

1993-07-01T23:59:59.000Z

362

Neutron scattering from polycrystalline ice (Ih): Some keys to understanding the collective behavior of liquid water  

Science Journals Connector (OSTI)

The phonon dispersion in the second Brillouin zone of polycrystalline ice (Ih) has been measured. The results confirm the predictions of a previous lattice-dynamics calculation [A. Criado, F.J. Bermejo, M. García-Hernández, and J.L. Martínez, Phys. Rev. E 47, 3516 (1993)] where anomalously steep dispersion curves of an apparent acoustic origin were found. The relevance of the present findings for explaining some apparently anomalous features concerning the collective dynamics of liquid water is finally discussed.

F. J. Bermejo; E. Frikkee; M. García-Hernández; J. L. Martínez; A. Criado

1993-09-01T23:59:59.000Z

363

Cast polycrystalline silicon photovoltaic module manufacturing technology improvements. Annual subcontract report, January 1, 1995--December 31, 1995  

SciTech Connect (OSTI)

The objective of this three-year program is to advance Solarex`s cast polycrystalline silicon manufacturing technology, reduce module production cost, increase module performance and expand Solarex`s commercial production capacities. Two specific objectives of this program are to reduce the manufacturing cost for polycrystalline silicon PV modules to less than $1.20/watt and to increase the manufacturing capacity by a factor of three.

Wohlgemuth, J. [Amoco/Enron Solar, Frederick, MD (United States)] [Amoco/Enron Solar, Frederick, MD (United States)

1996-06-01T23:59:59.000Z

364

Transverse electrokinetic and microfluidic effects in micro-patterned channels: lubrication analysis for slab geometries  

E-Print Network [OSTI]

Off-diagonal (transverse) effects in micro-patterned geometries are predicted and analyzed within the general frame of linear response theory, relating applied presure gradient and electric field to flow and electric current. These effects could contribute to the design of pumps, mixers or flow detectors. Shape and charge density modulations are proposed as a means to obtain sizeable transverse effects, as demonstrated by focusing on simple geometries and using the lubrication approximation.

Armand Ajdari

2001-01-29T23:59:59.000Z

365

Future marine fuels - Prediction and alleviation of potential combustion and lubrication problems  

SciTech Connect (OSTI)

This paper reviews the current and future marine fuels market and future fuel quality. It also describes the development of a method of ranking fuels by ignition delay which has led to the concept of a Calculated Carbon Aromaticity Index derived from simple fuel inspection properties. It also shows how increased engine fouling and corrosive wear, which might be expected from future quality fuel, can be controlled by improvements in lubrication and due attention to engine temperatures.

Williams, R.E.; Belcher, P.R.; Hengeveld, J.; Newbery, P.J.

1984-02-01T23:59:59.000Z

366

Helium irradiation effects in polycrystalline Si, silica, and single crystal Si  

SciTech Connect (OSTI)

Transmission electron microscopy (TEM) has been used to investigate the effects of room temperature 6 keV helium ion irradiation of a thin ({approx_equal}55 nm thick) tri-layer consisting of polycrystalline Si, silica, and single-crystal Si. The ion irradiation was carried out in situ within the TEM under conditions where approximately 24% of the incident ions came to rest in the specimen. This paper reports on the comparative development of irradiation-induced defects (primarily helium bubbles) in the polycrystalline Si and single-crystal Si under ion irradiation and provides direct measurement of a radiation-induced increase in the width of the polycrystalline layer and shrinkage of the silica layer. Analysis using TEM and electron energy-loss spectroscopy has led to the hypothesis that these result from helium-bubble-induced swelling of the silicon and radiation-induced viscoelastic flow processes in the silica under the influence of stresses applied by the swollen Si layers. The silicon and silica layers are sputtered as a result of the helium ion irradiation; however, this is estimated to be a relatively minor effect with swelling and stress-related viscoelastic flow being the dominant mechanisms of dimensional change.

Abrams, K. J.; Greaves, G.; Berg, J. A. van den [Materials and Physics Research Centre, University of Salford, Salford (United Kingdom); Hinks, J. A.; Donnelly, S. E. [School of Computing and Engineering, University of Huddersfield, Huddersfield (United Kingdom); Pawley, C. J. [Materials and Physics Research Centre, University of Salford, Salford (United Kingdom); School of Computing and Engineering, University of Huddersfield, Huddersfield (United Kingdom); Eyidi, D. [Institut Pprime, Universite de Poitiers, Poitiers (France); Ward, M. B. [Institute for Materials Research, University of Leeds, Leeds (United Kingdom)

2012-04-15T23:59:59.000Z

367

Solid electrolyte aided study of the mechanism of CO oxidation on polycrystalline platinum  

SciTech Connect (OSTI)

The mechanism of CO oxidation on polycrystalline Pt at atmospheric pressure has been investigated by combining kinetic and simultaneous potentiometric studies in a gradientless reactor containing one or two polycrystalline Pt films supported on stabilized zirconia. The initial oxidation state of the catalyst was found to have an important effect both on the steady-state behavior and on the waveform of rate and emf oscillations. A simple kinetic model where both oxygen adsorption and surface reaction are rate limiting is found to describe semiquantitatively the steady-state kinetic and potentiometric results both on preoxidized and on prereduced surfaces. The oscillatory behavior of the system was studied in detail by simultaneous mass spectroscopic monitoring of the concentrations of O/sub 2/ and CO/sub 2/. The kinetic and potentiometric results suggest strongly that the oscillations are caused by periodic formation and consumption of surface PtO/sub 2/. The formation of PtO/sub 2/ is verified by a series of surface CO-O/sub 2/ titration experiments. The experiments with two polycrystalline films show that oscillation synchronization occurs via the gas phase as the two films exposed to the same gaseous environment exhibit synchronous oscillations in the surface oxygen activity.

Yentekakis, I.V.; Neophytides, S.; Vayenas, C.G.

1988-05-01T23:59:59.000Z

368

Low substrate temperature deposition of diamond coatings derived from glassy carbon  

DOE Patents [OSTI]

A process is disclosed for depositing a diamond coating on a substrate at temperatures less than about 550 C. A powder mixture of glassy carbon and diamond particles is passed through a high velocity oxy-flame apparatus whereupon the powders are heated prior to impingement at high velocity against the substrate. The powder mixture contains between 5 and 50 powder volume percent of the diamond particles, and preferably between 5 and 15 powder volume percent. The particles have a size from about 5 to about 100 micrometers, with the diamond particles being about 5 to about 30 micrometers. The flame of the apparatus provides a velocity of about 350 to about 1000 meters per second, with the result that upon impingement upon the substrate, the glassy carbon is phase transformed to diamond as coaxed by the diamond content of the powder mixture. 2 figs.

Holcombe, C.E. Jr.; Seals, R.D.

1995-09-26T23:59:59.000Z

369

Black Diamond, Washington: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Diamond, Washington: Energy Resources Diamond, Washington: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 47.3087121°, -122.0031691° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":47.3087121,"lon":-122.0031691,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

370

Strategies for improving traffic operations at oversaturated signalized diamond interchanges  

E-Print Network [OSTI]

street improvement goals should include improved traffic flow along with reductions in congestion, air pollution, and energy use, without major new construction. Super-street arterials, which are multi-lane arterials with limited access and a limited...STRATEGIES FOR IMPROVING TRAFFIC OPERATIONS AT OVERSATURATED SIGNALIZED DIAMOND INTERCHANGES A Thesis by GEORGE CURTIS HERRICK Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements...

Herrick, George Curtis

1992-01-01T23:59:59.000Z

371

Method of forming fluorine-bearing diamond layer on substrates, including tool substrates  

DOE Patents [OSTI]

A method of forming a fluorine-bearing diamond layer on non-diamond substrates, especially on tool substrates comprising a metal matrix and hard particles, such as tungsten carbide particles, in the metal matrix. The substrate and a fluorine-bearing plasma or other gas are then contacted under temperature and pressure conditions effective to nucleate fluorine-bearing diamond on the substrate. A tool insert substrate is treated prior to the diamond nucleation and growth operation by etching both the metal matrix and the hard particles using suitable etchants.

Chang, R. P. H. (Glenview, IL); Grannen, Kevin J. (Evanston, IL)

2002-01-01T23:59:59.000Z

372

Perfect preferential orientation of nitrogen-vacancy defects in a synthetic diamond sample  

SciTech Connect (OSTI)

We show that the orientation of nitrogen-vacancy (NV) defects in diamond can be efficiently controlled through chemical vapor deposition growth on a (111)-oriented diamond substrate. More precisely, we demonstrate that spontaneously generated NV defects are oriented with a ?97% probability along the [111] axis, corresponding to the most appealing orientation among the four possible crystallographic axes. Such a nearly perfect preferential orientation is explained by analyzing the diamond growth mechanism on a (111)-oriented substrate and could be extended to other types of defects. This work is a significant step towards the design of optimized diamond samples for quantum information and sensing applications.

Lesik, M.; Roch, J.-F. [Laboratoire Aimé Cotton, CNRS, Université Paris-Sud and Ecole Normale Supérieure de Cachan, 91405 Orsay (France); Tetienne, J.-P.; Jacques, V., E-mail: vjacques@ens-cachan.fr [Laboratoire Aimé Cotton, CNRS, Université Paris-Sud and Ecole Normale Supérieure de Cachan, 91405 Orsay (France); Laboratoire de Photonique Quantique et Moléculaire, Ecole Normale Supérieure de Cachan and CNRS UMR 8537, 94235 Cachan (France); Tallaire, A., E-mail: alexandre.tallaire@lspm.cnrs.fr; Achard, J.; Mille, V.; Gicquel, A. [Laboratoire des Sciences des Procédés et des Matériaux, CNRS and Université Paris 13, 93340 Villetaneuse (France)

2014-03-17T23:59:59.000Z

373

New Superhard Form of Carbon Dents Diamond | U.S. DOE Office...  

Office of Science (SC) Website

exists in many different structures, each having different properties (e.g. graphite, graphene, and diamond). This research demonstrated yet another structure that is superhard,...

374

Corrosive Resistant Diamond Coatings for the Acid Based Thermo-Chemical Hydrogen Cycles  

SciTech Connect (OSTI)

This project was designed to test diamond, diamond-like and related materials in environments that are expected in thermochemical cycles. Our goals were to build a High Temperature Corrosion Resistance (HTCR) test stand and begin testing the corrosive properties of barious materials in a high temperature acidic environment in the first year. Overall, we planned to test 54 samples each of diamond and diamond-like films (of 1 cm x 1 cm area). In addition we use a corrosion acceleration method by treating the samples at a temperature much larger than the expected operating temperature. Half of the samples will be treated with boron using the FEDOA process.

Mark A. Prelas

2009-06-25T23:59:59.000Z

375

E-Print Network 3.0 - adherent diamond-like carbon Sample Search...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Science and Metallurgy, Composites and Coatings Group Collection: Materials Science 31 Atmospheric plasma deposition of diamond-like carbon coatings Angela M. Ladwig a,b,...

376

Hydrogen Storage in Diamond Powder Utilizing Plasma NaF Surface Treatment for Fuel Cell Applications  

SciTech Connect (OSTI)

Hydrogen Fuel Cells offer the vital solution to the world's socio-political dependence on oil. Due to existing difficulty in safe and efficient hydrogen storage for fuel cells, storing the hydrogen in hydrocarbon compounds such as artificial diamond is a realistic solution. By treating the surface of the diamond powder with a Sodium Fluoride plasma exposure, the surface of the diamond is cleaned of unwanted molecules. Due to fluorine's electro negativity, the diamond powder is activated and ready for hydrogen absorption. These diamond powder pellets are then placed on a graphite platform that is heated by conduction in a high voltage circuit made of tungsten wire. Then, the injection of hydrogen gas into chamber allows the storage of the Hydrogen on the surface of the diamond powder. By neutron bombardment in the nuclear reactor, or Prompt Gamma Neutron Activation Analysis, the samples are examined for parts per million amounts of hydrogen in the sample. Sodium Fluoride surface treatment allows for higher mass percentage of stored hydrogen in a reliable, resistant structure, such as diamond for fuel cells and permanently alters the diamonds terminal bonds for re-use in the effective storage of hydrogen. The highest stored amount utilizing the NaF plasma surface treatment was 22229 parts per million of hydrogen in the diamond powder which amounts to 2.2229% mass increase.

Leal, David A.; Leal-Quiros, E. [Mechanical Engineering, Polytechnic University of Puerto Rico (Puerto Rico); Velez, Angel; Prelas, Mark A.; Gosh, Tushar [University of Missouri-Columbia, Nuclear Science and Engineering Institute (United States)

2006-12-04T23:59:59.000Z

377

Hydrogen Storage in Diamond Powder Utilizing Plasma NaF Surface Treatment for Fuel Cell Applications  

Science Journals Connector (OSTI)

Hydrogen Fuel Cells offer the vital solution to the world’s socio?political dependence on oil. Due to existing difficulty in safe and efficient hydrogen storage for fuel cells storing the hydrogen in hydrocarbon compounds such as artificial diamond is a realistic solution. By treating the surface of the diamond powder with a Sodium Fluoride plasma exposure the surface of the diamond is cleaned of unwanted molecules. Due to fluorine’s electro negativity the diamond powder is activated and ready for hydrogen absorption. These diamond powder pellets are then placed on a graphite platform that is heated by conduction in a high voltage circuit made of tungsten wire. Then the injection of hydrogen gas into chamber allows the storage of the Hydrogen on the surface of the diamond powder. By neutron bombardment in the nuclear reactor or Prompt Gamma Neutron Activation Analysis the samples are examined for parts per million amounts of hydrogen in the sample. Sodium Fluoride surface treatment allows for higher mass percentage of stored hydrogen in a reliable resistant structure such as diamond for fuel cells and permanently alters the diamonds terminal bonds for re?use in the effective storage of hydrogen. The highest stored amount utilizing the NaF plasma surface treatment was 22229 parts per million of hydrogen in the diamond powder which amounts to 2.2229% mass increase.

David A. Leal; Angel Velez; Mark A. Prelas; Tushar Gosh; E. Leal?Quiros

2006-01-01T23:59:59.000Z

378

Characterization of hydrocarbons found in the arctic aquatic environment near the Ekati diamond mine.  

E-Print Network [OSTI]

??Polycyclic aromatic hydrocarbons (PAHs) in the aquatic environment of the Ekati Diamond Mine were evaluated in snow, sediment, air and water (via passive membrane samplers).… (more)

Nabess, Stephanie Ann

2014-01-01T23:59:59.000Z

379

A reaction-layer mechanism for the delayed failure of micron-scale polycrystalline silicon structural films subjected to high-cycle fatigue loading  

SciTech Connect (OSTI)

A study has been made of high-cycle fatigue in 2um thick structural films of n+- type, polycrystalline silicon for MEMS applications.

Muhlstein, C.L.; Stach, E.A.; Ritchie, R.O.

2001-11-01T23:59:59.000Z

380

Origin of sub-lithospheric diamonds from the Juina-5 kimberlite (Brazil): constraints from carbon isotopes and inclusion compositions  

Science Journals Connector (OSTI)

Forty-one diamonds sourced from the Juina-5 kimberlite pipe in Southern Brazil, which contain optically identifiable inclusions, have been studied using an integrated approach. The diamonds contain <20 ppm ni...

A. R. Thomson; S. C. Kohn; G. P. Bulanova…

2014-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Cast polycrystalline silicon photovoltaic module manufacturing technology improvements. Semiannual subcontract report, January 1--June 30, 1995  

SciTech Connect (OSTI)

The objective of this three-year program is to advance Solarex`s cast polycrystalline silicon manufacturing technology, reduce module production cost, increase module performance and expand Solarex`s commercial production capacities. Two specific objectives of this program are to reduce the manufacturing cost for polycrystalline silicon PV modules to less than $1.20/watt and to increase the manufacturing capacity by a factor of three. To achieve these objectives, Solarex is working in the following technical areas: casting, wire saws, cell process, module assembly, frameless module development, and automated cell handling. Accomplishments reported include: Cast first successful larger ingot producing 73% larger volume of usable Si; Increased the size of the ingot even further and cast an ingot yielding nine 11.4 {times} 11.4 cm bricks, representing a 125% increase in usable Si from a single casting; Operated the wire-saw in a semi-operational mode, producing 459,000 wafers at 94.1% overall yield; Reduced the cost of wire-saw consumables, spare parts, and waste disposal; Developed a cost-effective back surface field process that increases cell efficiency by 5% and began production trials; Developed a plan for increasing the capacity in the module assembly area; Completed qualification testing of modules built using Spire`s automated tabbing and stringing machine; Selected, tested, and qualified a low-cost electrical termination system; Completed long-term UV testing of experimental back sheets; Qualified the structure and adhesive-tape system for mounting frameless modules; and ARRI completed a study of the fracture properties of cast polycrystalline Si wafers and provided the information necessary to calculate the maximum stresses allowable during wafer handling.

Wohlgemuth, J. [Solarex Corp., Frederick, MD (United States)

1996-02-01T23:59:59.000Z

382

The wetting behavior of NiAl and NiPtAl on polycrystalline alumina  

SciTech Connect (OSTI)

In order to understand the beneficial effect of Pt on the adherence of thermally grown alumina scales, sessile drop experiments were performed to study the wetting of poly-crystalline alumina by nickel-aluminum alloys with or without platinum addition where the amount of Pt ranged from 2.4 to 10 at.%. Subsequent interfacial structure was evaluated using atomic force microscopy. Platinum addition enhances the wettability of NiAl alloys on alumina, reduces the oxide/alloy interface energy and increases the interfacial mass transport rates.

Saiz, Eduardo; Gauffier, Antoine; Saiz, Eduardo; Tomsia, Antoni P.; Hou, Peggy Y.

2007-07-01T23:59:59.000Z

383

Processing and analysis of polycrystalline thin-film solar cells made from uniform single phase materials  

SciTech Connect (OSTI)

This paper presents processes for producing uniform single phase polycrystalline films of Cu(InGa)Se{sub 2} and CdTe and the analysis of the resulting films and solar cell devices. The first two sections discuss Cu(InGa)Se{sub 2} cells prepared by the selenization of Cu-In-Ga films and of elemental evaporation. The third section describes a CdCl{sub 2} vapor treatment of CdTe that results in uniform large grain films with reduced {ital S} diffusion and reproducible performance. {copyright} {ital 1996 American Institute of Physics.}

Birkmire, R.W.; Hichri, H.; Klenk, R.; Marudachalam, M.; McCandless, B.E.; Phillips, J.E.; Schultz, J.M.; Shafarman, W.N. [Institute of Energy Conversion, Department of Energy, University Center of Excellence for Photovoltaic, Research and Education (National Renewable Energy Laboratory), University of Delaware, Newark, Delaware 19716 (United States)

1996-01-01T23:59:59.000Z

384

Construction of High-Performance, Low-Cost Photoelectrodes with Controlled Polycrystalline Architectures  

SciTech Connect (OSTI)

The major goal of our research was to gain the ability in electrochemical synthesis to precisely control compositions and morphologies of various oxide-based polycrystalline photoelectrodes in order to establish the composition-morphology-photoelectrochemical property relationships while discovering highly efficient photoelectrode systems for use in solar energy conversion. Major achievements include: development of porous n-type BiVO{sub 4} photoanode for efficient and stable solar water oxidation; development of p-type CuFeO{sub 2} photocathode for solar hydrogen production; and junction studies on electrochemically fabricated p-n Cu{sub 2}O homojunction solar cells for efficiency enhancement.

Kyoung-Shin Choi

2013-06-30T23:59:59.000Z

385

Simulation of electrical conduction in thin polycrystalline metallic films: Impact of microstructure  

SciTech Connect (OSTI)

We examine the impact of microstructural features on the electrical conductivity of a thin metallic film using Monte Carlo simulation. In particular, we obtain the dependence of the conductivity (in the absence of surface scattering) on average grain size and electron scattering mechanisms, the latter parametrized by a transmission coefficient, for a model polycrystal generated by a Voronoi tessellation. We find that the conductivity can be described in limiting cases in terms of either a simplified hopping model or a trapping model. Finally, we compare our results with the Mayadas-Shatzkes model of grain-boundary scattering and with experimental resistivity measurements for polycrystalline copper thin films.

Rickman, J. M. [Department of Materials Science and Engineering and Department of Physics, Lehigh University, Bethlehem, Pennsylvania 18015 (United States)] [Department of Materials Science and Engineering and Department of Physics, Lehigh University, Bethlehem, Pennsylvania 18015 (United States); Barmak, K. [Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027 (United States)] [Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027 (United States)

2013-10-07T23:59:59.000Z

386

Surface segregation effects in electrocatalysis: Kinetics ofoxygen reduction reaction on polycrystalline Pt3Ni alloy surfaces  

SciTech Connect (OSTI)

Effects of surface segregation on the oxygen reduction reaction (ORR) have been studied on a polycrystalline Pt3Ni alloy in acid electrolyte using ultra high vacuum (UHV) surface sensitive probes and the rotating ring disk electrode (RRDE) method. Preparation, modification and characterization of alloy surfaces were done in ultra high vacuum (UHV). Depending on the preparation method, two different surface compositions of the Pt3Ni alloy are produced: a sputtered surface with 75 % Pt and an annealed surface (950 K ) with 100 % Pt. The latter surface is designated as the 'Pt-skin' structure, and is a consequence of surface segregation, i.e., replacement of Ni with Pt atoms in the first few atomic layers. Definitive surface compositions were established by low energy ion scattering spectroscopy (LEISS). The cyclic voltammetry of the 'Pt-skin' surface as well as the pseudocapacitance in the hydrogen adsorption/desorption potential region is similar to a polycrystalline Pt electrode. Activities of ORR on Pt3Ni alloy surfaces were compared to polycrystalline Pt in 0.1M HClO4 electrolyte for the observed temperature range of 293 < T < 333 K. The order of activities at 333 K was: 'Pt-skin' > Pt3Ni (75% Pt) > Pt with the maximum catalytic enhancement obtained for the 'Pt-skin' being 4 times that for pure Pt. Catalytic improvement of the ORR on Pt3Ni and 'Pt-skin' surfaces was assigned to the inhibition of Pt-OHad formation (on Pt sites) versus polycrystalline Pt. Production of H2O2 on both surfaces were similar compared to the pure Pt. Kinetic analyses of RRDE data confirmed that kinetic parameters for the ORR on the Pt3Ni and 'Pt-skin' surfaces are the same as on pure Pt: reaction order, m=1, two identical Tafel slopes, activation energy, {approx} 21-25 kJ/mol. Therefore the reaction mechanism on both Pt3Ni and 'Pt-skin' surfaces is the same as one proposed for pure Pt i.e. 4e{sup -} reduction pathway.

Stamenkovic, V.; Schmidt, T.J.; Ross, P.N.; Markovic, N.M.

2002-11-01T23:59:59.000Z

387

Triboelectric charging of a perfluoropolyether lubricant J. V. Wasem, B. L. LaMarche, S. C. Langford, and J. T. Dickinsona)  

E-Print Network [OSTI]

Triboelectric charging of a perfluoropolyether lubricant J. V. Wasem, B. L. LaMarche, S. C, Washington 99164-2814 Received 10 July 2002; accepted 14 November 2002 Perfluoropolyethers PFPE are used of the lubricant. © 2003 American Institute of Physics. DOI: 10.1063/1.1536011 1. INTRODUCTION Perfluoropolyethers

Dickinson, J. Thomas

388

A kinetic model of diamond nucleation and silicon carbide interlayer formation during chemical vapor deposition  

E-Print Network [OSTI]

A kinetic model of diamond nucleation and silicon carbide interlayer formation during chemical February 2005 Available online 7 April 2005 Abstract The presence of thin silicon carbide intermediate of carbon atoms into the silicon carbide layer and the morphology and orientation of the diamond film

Dandy, David

389

On the optimization of a dc arcjet diamond chemical vapor deposition reactor  

E-Print Network [OSTI]

On the optimization of a dc arcjet diamond chemical vapor deposition reactor S. W. Reevea) and W. A precursor in our dc arcjet reactor.1 Based on conclusions drawn from that work, an optimization strategy diamond film growth in a dc arcjet chemical vapor deposition reactor has been developed. Introducing

Dandy, David

390

Current Issues and Problems in the Chemical Vapor Deposition of Diamond  

Science Journals Connector (OSTI)

...SEMICONDUCTORS DIAMOND, GALLIUM NITRIDE AND SILICON-CARBIDE...FROM METHANE HYDROGEN WATER MIXED GAS-USING A MICROWAVE...diamond and cubic boron nitride (c-BN; Bora-zon...be related to a high solubility or mobility for C on...

Walter A. Yarbrough; Russell Messier

1990-02-09T23:59:59.000Z

391

Raman spectroscopy of amorphous, nanostructured, diamond–like carbon, and nanodiamond  

Science Journals Connector (OSTI)

...varying excitation energy. By visible and ultra- violet excitation measurements, the...diamond, also refereed to as nanodiamond or ultra-nanocrystalline diamond. The chemical...phononfrequency(cm-1) M K GE aexp GE ath exp. MK M K GE aexp GI ath q = (0, , 0) q...

2004-01-01T23:59:59.000Z

392

A robust scanning diamond sensor for nanoscale imaging with single nitrogen-vacancy centres  

E-Print Network [OSTI]

A robust scanning diamond sensor for nanoscale imaging with single nitrogen-vacancy centres P and A. Yacoby1 * The nitrogen-vacancy defect centre in diamond1­4 has potential applications processing9 and bioimaging10 . These applications rely on the ability to pos- ition a single nitrogen-vacancy

Walsworth, Ronald L.

393

Polycrystalline oxides formation during transient oxidation of (001) Cu-Ni binary alloys studied by in situ TEM and XRD.  

SciTech Connect (OSTI)

The nucleation and growth of Cu{sub 2}O and NiO islands due to oxidation of Cu{sub x}Ni{sub 1-x} (001) films were monitored, at various temperatures, by in situ ultra-high vacuum (UHV) transmission electron microscopy (TEM) and in situ synchrotron X-ray diffraction (XRD). In remarkable contrast to our previous observations of Cu and Cu-Au oxidation, irregular-shaped polycrystalline oxide islands formed with respect to the Cu-Ni alloy film, and an unusual second oxide nucleation stage was noted. In situ XRD experiments revealed that NiO formed first epitaxially, then other orientations appeared, and finally polycrystalline Cu{sub 2}O developed as the oxidation pressure was increased. The segregation of Ni and Cu towards or away, respectively, from the alloy surface during oxidation could disrupt the surface and cause polycrystalline oxide formation.

Yang, J. C.; Li, Z. Q.; Sun, L.; Zhou, G. W.; Eastman, J. A.; Fong, D. D.; Fuoss, P. H.; Baldo, P. M.; Rehn, L. E.; Thompson, L. J.; Materials Science Division; Univ.of Pittsburgh; State Univ. of New York at Binghamton

2009-01-01T23:59:59.000Z

394

Vacuum encapsulated hermetically sealed diamond amplified cathode capsule and method for making same  

DOE Patents [OSTI]

A vacuum encapsulated, hermetically sealed cathode capsule for generating an electron beam of secondary electrons, which generally includes a cathode element having a primary emission surface adapted to emit primary electrons, an annular insulating spacer, a diamond window element comprising a diamond material and having a secondary emission surface adapted to emit secondary electrons in response to primary electrons impinging on the diamond window element, a first cold-weld ring disposed between the cathode element and the annular insulating spacer and a second cold-weld ring disposed between the annular insulating spacer and the diamond window element. The cathode capsule is formed by a vacuum cold-weld process such that the first cold-weld ring forms a hermetical seal between the cathode element and the annular insulating spacer and the second cold-weld ring forms a hermetical seal between the annular spacer and the diamond window element whereby a vacuum encapsulated chamber is formed within the capsule.

Rao, Triveni; Walsh, John; Gangone, Elizabeth

2014-12-30T23:59:59.000Z

395

Structure and superconductivity of isotope-enriched boron-doped diamond  

SciTech Connect (OSTI)

Superconducting boron-doped diamond samples were synthesized with isotopes of {sup 10}B, {sup 11}B, {sup 13}C and {sup 12}C. We claim the presence of a carbon isotope effect on the superconducting transition temperature, which supports the 'diamond-carbon'-related nature of superconductivity and the importance of the electron-phonon interaction as the mechanism of superconductivity in diamond. Isotope substitution permits us to relate almost all bands in the Raman spectra of heavily boron-doped diamond to the vibrations of carbon atoms. The 500 cm{sup 01} Raman band shifts with either carbon or boron isotope substitution and may be associated with vibrations of paired or clustered boron. The absence of a superconducting transition (down to 1.6 K) in diamonds synthesized in the Co-C-B system at 1900 K correlates with the small boron concentration deduced from lattice parameters.

Thompson, Joe D [Los Alamos National Laboratory; Ekimov, E A [INSTIT OF HIGH PRESSURE; Sidorov, V A [INSTIT OF HIGH PRESSURE; Zoteev, A [MOSCOW SU; Lebed, Y [INST FOR NUCI RES; Stishov, S M [INST FOR HIGH PRESSURE

2008-01-01T23:59:59.000Z

396

Enhancement of the nucleation of smooth and dense nanocrystalline diamond films by using molybdenum seed layers  

SciTech Connect (OSTI)

A method for the nucleation enhancement of nanocrystalline diamond (NCD) films on silicon substrates at low temperature is discussed. A sputter deposition of a Mo seed layer with thickness 50 nm on Si substrates was applied followed by an ultrasonic seeding step with nanosized detonation diamond powders. Hot-filament chemical vapor deposition (HF-CVD) was used to nucleate and grow NCD films on substrates heated up at 550 deg. C. The nucleation of diamond and the early stages of NCD film formation were investigated at different methane percentages in methane/hydrogen gas mixtures by atomic force microscopy, micro-Raman spectroscopy, scanning electron microscopy, and grazing incidence x-ray analyses in order to gain specific insight in the nucleation process of NCD films. The nucleation kinetics of diamond on the Mo-coated Si substrates was found to be up to ten times higher than on blank Si substrates. The enhancement of the nucleation of diamond on thin Mo interlayers results from two effects, namely, (a) the nanometer rough Mo surface shows an improved embedding of ultrasonically introduced nanosized diamond seeds that act as starting points for the diamond nucleation during HF-CVD and (b) the rapid carbonization of the Mo surface causes the formation of Mo{sub 2}C onto which diamond easily nucleates. The diamond nucleation density progressively increases at increasing methane percentages and is about 5x10{sup 10} cm{sup -2} at 4.0% methane. The improved nucleation kinetics of diamond on Mo interlayers facilitates the rapid formation of NCD films possessing a very low surface roughness down to {approx}6 nm, and allows a submicron thickness control.

Buijnsters, J. G. [Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 44, B-3001 Leuven (Belgium); Institute for Molecules and Materials, Radboud University Nijmegen, Heijendaalseweg 135, 6525 AJ Nijmegen (Netherlands); Vazquez, L. [Instituto de Ciencia de Materiales de Madrid (ICMM-CSIC), Cantoblanco, C/Sor Juana Ines de la Cruz 3, 28049 Madrid (Spain); Dreumel, G. W. G. van; Meulen, J. J. ter; Enckevort, W. J. P. van [Institute for Molecules and Materials, Radboud University Nijmegen, Heijendaalseweg 135, 6525 AJ Nijmegen (Netherlands); Celis, J. P. [Department of Metallurgy and Materials Engineering, Katholieke Universiteit Leuven, Kasteelpark Arenberg 44, B-3001 Leuven (Belgium)

2010-11-15T23:59:59.000Z

397

Diamond Patterns in the Cellular Front of an Overdriven Detonation  

Science Journals Connector (OSTI)

A nonlinear integral-differential equation describing the cellular front of an overdriven detonation is obtained by an analysis carried out in the neighborhood of the instability threshold. The analysis reveals both an unusual mean streaming motion, resulting from the rotational part of the oscillatory flow, and pressure bursts generated by the crossover of cusps representative of Mach stems propagating on the detonation front. A numerical study of the nonlinear equation exhibits the “diamond” patterns observed in experiments. An overall physical understanding is provided.

P. Clavin and B. Denet

2002-01-10T23:59:59.000Z

398

Nanoscale fluorescence lifetime imaging with a single diamond NV center  

E-Print Network [OSTI]

Solid-state quantum emitters, such as artificially engineered quantum dots or naturally occurring defects in solids, are being investigated for applications ranging from quantum information science and optoelectronics to biomedical imaging. Recently, these same systems have also been studied from the perspective of nanoscale metrology. In this letter we study the near-field optical properties of a diamond nanocrystal hosting a single nitrogen vacancy center. We find that the nitrogen vacancy center is a sensitive probe of the surrounding electromagnetic mode structure. We exploit this sensitivity to demonstrate nanoscale fluorescence lifetime imaging microscopy (FLIM) with a single nitrogen vacancy center by imaging the local density of states of an optical antenna.

Ryan Beams; Dallas Smith; Timothy W. Johnson; Sang-Hyun Oh; Lukas Novotny; Nick Vamivakas

2013-03-05T23:59:59.000Z

399

Engineering shallow spins in diamond with nitrogen delta-doping  

SciTech Connect (OSTI)

We demonstrate nanometer-precision depth control of nitrogen-vacancy (NV) center creation near the surface of synthetic diamond using an in situ nitrogen delta-doping technique during plasma-enhanced chemical vapor deposition. Despite their proximity to the surface, doped NV centers with depths (d) ranging from 5 to 100 nm display long spin coherence times, T{sub 2} > 100 {mu}s at d = 5 nm and T{sub 2} > 600 {mu}s at d {>=} 50 nm. The consistently long spin coherence observed in such shallow NV centers enables applications such as atomic-scale external spin sensing and hybrid quantum architectures.

Ohno, Kenichi; Joseph Heremans, F.; Bassett, Lee C.; Myers, Bryan A.; Toyli, David M.; Bleszynski Jayich, Ania C.; Palmstrom, Christopher J.; Awschalom, David D. [Center for Spintronics and Quantum Computation, University of California, Santa Barbara, California 93106 (United States)

2012-08-20T23:59:59.000Z

400

Miscibility, solubility, viscosity, and density measurements for R-236fa with potential lubricants. Final report  

SciTech Connect (OSTI)

The report gives results of miscibility, solubility, viscosity, and density measurements for refrigerant R-236fa and two potential lubricants. (The data are needed to determine the suitability of refrigerant/lubricant combinations for use in refrigeration systems.) The tested oils were pentaerythritol ester mixed-acid (ISO68), hereafter SW-68 manufactured by Castrol, and polyol ester mixed-acid (ISO46), hereafter Arctic-46 manufactured by Mobil. Miscibility was measured in a series of miniature test cells submerged in a constant temperature bath, precisely controlled over a temperature range of -50 to 90 C. Solubility, viscosity, and density data were also obtained for R-236fa mixed with the two oils for a refrigerant concentration of 0 to 40 wt % refrigerant over a temperature range of 30 to 100 C. This research shows that: (1) solubility, viscosity, and density are functions of temperature and concentration, (2) solubility increases with increasing temperature and refrigerant concentration (i.e., mass fraction of refrigerant). (3) viscosity decreases with increasing temperature and refrigerant concentration, and (4) density decreases with increasing temperature but increases with increasing refrigerant concentration. R-114 and naphthenic mineral oil were also tested.

Kang, H.M.; Pate, M.B.

1999-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Thin film hydrodynamic lubrication of flying heads in magnetic disk storages  

Science Journals Connector (OSTI)

Typical hydrodynamic lubrication problems commonly encountered in the ultrathin spacing between a computer flying head and a magnetic disk are reviewed. In magnetic disk storages, minimizing the spacing between the head and disk is essential to promote the largest possible increase in magnetic bit density. In the small (nearly 1.0 ?m) spacing that has recently been attained, the rarefaction effects owing to the molecular mean free path become dominant. Specifically, in this paper the three governing equations resulting from the first- and second-order slip-flow models and from the linearized Boltzmann equation are compared. Next, some numerical approaches to eliminating the instability in pressure distribution in the high bearing number region are described. Surface roughness effects are also a principal concern in thin spacing. A mixed lubrication model which enables the analysis of the start/stop operation and the average film thickness theory for one- and two-dimensional roughnesses is summarized. Finally, from the viewpoint of practical head design, the slider dynamic characteristics and related slider design factors are discussed.

Yasunaga Mitsuya

1987-01-01T23:59:59.000Z

402

Prediction of refrigerant-lubricant viscosity using the general PC-SAFT friction theory  

Science Journals Connector (OSTI)

Abstract In this work, a friction theory (f-theory) viscosity model founded on the perturbed-chain statistical associating fluid theory (PC-SAFT) equation of state (EoS) was used to calculate the viscosity of refrigerant-oil mixtures. The model, which links viscosity to the repulsive and attractive pressure terms of the PC-SAFT EoS, can provide satisfactory viscosity predictions of mixtures of carbon dioxide (R-744) and two synthetic lubricants, namely, a polyolester (POE) ISO VG 68 and an alkylbenzene (AB) ISO VG 32, as well as mixtures of isobutane (R-600a) and two other synthetic lubricants, a POE ISO VG 7 and an AB ISO VG 5. The root-mean square (RMS) deviations related to the viscosity prediction were 0.69% (R-600a/POE ISO 7), 0.99% (R-600a/AB ISO VG 5), 3.16% (R-744/POE ISO VG 68) and 3.18% (R-744/AB ISO VG 32).

Moisés A. Marcelino Neto; Jader R. Barbosa Jr.

2014-01-01T23:59:59.000Z

403

Diamond Willow Wind (08) Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Willow Wind (08) Wind Farm Willow Wind (08) Wind Farm Jump to: navigation, search Name Diamond Willow Wind (08) Wind Farm Facility Diamond Willow Wind (08) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Montana-Dakota Utilities Developer Montana-Dakota Utilities Energy Purchaser Montana-Dakota Utilities Location Near Baker MT Coordinates 46.268046°, -104.201742° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":46.268046,"lon":-104.201742,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

404

Diamond Willow Wind (07) Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Wind (07) Wind Farm Wind (07) Wind Farm Jump to: navigation, search Name Diamond Willow Wind (07) Wind Farm Facility Diamond Willow Wind (07) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Montana-Dakota Utilities Developer Montana-Dakota Utilities Energy Purchaser Montana-Dakota Utilities Location Near Baker MT Coordinates 46.274903°, -104.183013° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":46.274903,"lon":-104.183013,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

405

Optical signatures of silicon-vacancy spins in diamond  

E-Print Network [OSTI]

Colour centres in diamond have emerged as versatile tools for solid-state quantum technologies ranging from quantum information to metrology, where the nitrogen-vacancy centre is the most studied to-date. Recently, this toolbox has expanded to include different materials for their nanofabrication opportunities, and novel colour centres to realize more efficient spin-photon quantum interfaces. Of these, the silicon-vacancy centre stands out with ultrabright single photon emission predominantly into the desirable zero-phonon line. The challenge for utilizing this centre is to realise the hitherto elusive optical access to its electronic spin. Here, we report spin-tagged resonance fluorescence from the negatively charged silicon-vacancy centre. In low-strain bulk diamond spin-selective excitation under finite magnetic field reveals a spin-state purity approaching unity in the excited state. We also investigate the effect of strain on the centres in nanodiamonds and discuss how spin selectivity in the excited state remains accessible in this regime.

Tina Muller; Christian Hepp; Benjamin Pingault; Elke Neu; Stefan Gsell; Matthias Schreck; Hadwig Sternschulte; Doris Steinmueller-Nethl; Christoph Becher; Mete Atature

2013-12-10T23:59:59.000Z

406

Mechanical stiffness and dissipation in ultrananocrystalline diamond micro-resonators.  

SciTech Connect (OSTI)

We have characterized mechanical properties of ultrananocrystalline diamond (UNCD) thin films grown using the hot filament chemical vapor deposition (HFCVD) technique at 680 C, significantly lower than the conventional growth temperature of {approx}800 C. The films have {approx}4.3% sp{sup 2} content in the near-surface region as revealed by near edge x-ray absorption fine structure spectroscopy. The films, {approx}1 {micro}m thick, exhibit a net residual compressive stress of 370 {+-} 1 MPa averaged over the entire 150 mm wafer. UNCD microcantilever resonator structures and overhanging ledges were fabricated using lithography, dry etching, and wet release techniques. Overhanging ledges of the films released from the substrate exhibited periodic undulations due to stress relaxation. This was used to determine a biaxial modulus of 838 {+-} 2 GPa. Resonant excitation and ring-down measurements in the kHz frequency range of the microcantilevers were conducted under ultrahigh vacuum (UHV) conditions in a customized UHV atomic force microscope system to determine Young's modulus as well as mechanical dissipation of cantilever structures at room temperature. Young's modulus is found to be 790 {+-} 30 GPa. Based on these measurements, Poisson's ratio is estimated to be 0.057 {+-} 0.038. The quality factors (Q) of these resonators ranged from 5000 to 16000. These Q values are lower than theoretically expected from the intrinsic properties of diamond. The results indicate that surface and bulk defects are the main contributors to the observed dissipation in UNCD resonators.

Sumant, A. V.; Adiga, V. P.; Suresh, S.; Gudeman, C.; Auciello, O.; Carlis, J. A.; Carpick, R. W.

2009-01-01T23:59:59.000Z

407

CX-005128: Categorical Exclusion Determination | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

28: Categorical Exclusion Determination 28: Categorical Exclusion Determination CX-005128: Categorical Exclusion Determination The Development of Open, Water Lubricated Polycrystalline Diamond Thrust Bearings For use in Marine Hydrokinetic (MHK) Energy Machines CX(s) Applied: A9, B3.6 Date: 01/25/2011 Location(s): Orem, Utah Office(s): Energy Efficiency and Renewable Energy, Golden Field Office United States Synthetic Corporation is proposing to use federal funding to design, fabricate and test polycrystalline diamond (PCD) thrust bearings for marine hydrokinetic (MHK) systems. A key design element in most MHK strategies would be robust bearings, which can operate for extended periods of time in the harsh marine environments. The goal of the proposed project is to demonstrate how PCD thrust bearings would reduce the cost of

408

CX-005184: Categorical Exclusion Determination | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

84: Categorical Exclusion Determination 84: Categorical Exclusion Determination CX-005184: Categorical Exclusion Determination The Development of Open, Water Lubricated Polycrystalline Diamond Thrust Bearings For use in Marine Hydrokinetic Energy Machines CX(s) Applied: A9, B3.6 Date: 01/28/2011 Location(s): Orem, Utah Office(s): Energy Efficiency and Renewable Energy, Golden Field Office United States Synthetic Corporation is proposing to use federal funding to design, fabricate and test polycrystalline diamond (PCD) thrust bearings for marine hydrokinetic (MHK) systems. A key design element in most MHK strategies would be robust bearings, which can operate for extended periods of time in the harsh marine environments. The goal of the proposed project is to demonstrate how PCD thrust bearings would reduce the cost of

409

Effects of moisture on wear of components lubricated with diesel fuel. Interim report, May 1996--September 1997  

SciTech Connect (OSTI)

The durability of some fuel injection systems on compression-ignition engines will be adversely affected by fuels of significantly low lubricity. Previous work has shown that fuel-lubricated wear is sensitive to the availability of moisture, particularly in severely refined fuels, which are designed to minimize exhaust emissions. The effects of moisture may be particularly relevant in a marine environment in which sea water is used as ballast in the fuel tanks. Traditional, less-refined fuels contain natural corrosion inhibitors that reduce oxidative wear, although alternate wear mechanisms may still affect long-term durability. However, no detailed study bas been performed to define the effects of water contamination and its relationship to fuel composition. Standardized laboratory-scale tests that show good correlation with wear in full-scale fuel injection systems for ground vehicles are available. In the present work, the standard procedures for the HFRR and BOCLE/SLBOCLE apparatus were modified to show the effects of both dissolved and emulsified water on fuel-lubricated wear. The results indicate that the lubricity of all but the most severely hydrotreated fuels are insensitive to contamination by either deionized or salt water. Moreover, the relatively short aeration period used in the ASTM D 5001 and D 6078 BOCLE test procedures has no measurable effect on water concentration in the test fuel sample.

Lacey, P.I.; Erwin, J.

1999-03-01T23:59:59.000Z

410

Friction-induced vibration of a lubricated mechanical system J-J. Sinou*, J. Cayer-Barrioz and H. Berro  

E-Print Network [OSTI]

1 Friction-induced vibration of a lubricated mechanical system J-J. Sinou*, J. Cayer-Barrioz and H that incorporates realistic laws of local friction issued from previous experimental results. The objective or by themselves, such as friction-induced vibrations. In all cases, these vibrations are hardly controllable

Paris-Sud XI, Université de

411

Titanium Lubrication  

Science Journals Connector (OSTI)

... Iodine and n-butylbenzene were analytical reagent grade and were used without further purification. The SAE 10, 150 SUS oil was a highly refined straight chain hydrocarbon oil without additives. ... 0-25-0-38 Little wear, wear track had

RICHARD W. ROBERTS; ROBERT S. OWENS

1963-10-26T23:59:59.000Z

412

Marine Lubricants  

Science Journals Connector (OSTI)

Marine diesel engines are classified by speed, either ... detergents/dispersants, antioxidants, corrosion inhibitors, anti-wear/load-carrying/ep, pour-point depressants and ... . There are no simple systems for c...

B. H. Carter; D. Green

2010-01-01T23:59:59.000Z

413

Lubricants Activities  

Broader source: Energy.gov [DOE]

2012 DOE Hydrogen and Fuel Cells Program and Vehicle Technologies Program Annual Merit Review and Peer Evaluation Meeting

414

Three-dimensional plastic response in polycrystalline copper via near-field high-energy X-ray diffraction microscopy  

Science Journals Connector (OSTI)

The evolution of the crystallographic orientation field in a polycrystalline sample of copper is mapped in three dimensions as tensile strain is applied. Using forward-modeling analysis of high-energy X-ray diffraction microscopy data, the ability to track intragranular orientation variations is demonstrated.

Li, S.F.

2012-10-25T23:59:59.000Z

415

Simulation of Polycrystalline Cu(In,Ga)Se2 Solar Cells in Two Dimensions Markus Gloeckler, Wyatt K. Metzger1  

E-Print Network [OSTI]

that a plausible reason behind highly efficient thin-film CIGS solar cells ( > 17%) is an inherent valenceSimulation of Polycrystalline Cu(In,Ga)Se2 Solar Cells in Two Dimensions Markus Gloeckler, Wyatt K) solar cells and its effects on solar-cell performance. The simulations predict that (1) for device

Sites, James R.

416

Crack-Size Effects on Cyclic and Monotonic Crack Growth in Polycrystalline Alumina: Quantification of the Role of Grain Bridging  

E-Print Network [OSTI]

-prediction methodologies, it is necessary in many materials that the subcritical crack-growth and toughness propertiesCrack-Size Effects on Cyclic and Monotonic Crack Growth in Polycrystalline Alumina: Quantification propagation has been quantitatively examined in a 99.5% pure alumina. Fatigue-crack growth properties for both

Ritchie, Robert

417

Structure and photoluminescence of annealed semi-insulating polycrystalline silicon material obtained by disilane  

Science Journals Connector (OSTI)

Semi-insulating polycrystalline silicon samples from a mixture of disilane and nitrous oxide were deposited with different oxygen content and annealed by RTA under different time and temperature conditions. Structural characterization by TEM showed that after annealing and in samples with high silicon content, the excess of silicon crystallizes in small clusters with diameters between 40–80 Å. As shown by FTIR and XPS, the matrix surrounding the nanocrystals is composed of SiOx and SiO2 regions. A thermodynamic free energy model for the different silicon tetrahedral configurations was applied to the structure of this material. The model predicted that phase separation is favoured after annealing at high temperature, but some remaining concentrations of suboxide species are present in the whole range of oxygen content, all these results being in agreement with the shell model. Furthermore, photoluminescence experiments only showed bands owing to defects, in contrast with visible emission reported for nanocrystals of the same size.

B. Garrido; J.A. Moreno; M. López; A. Vilá; J. Samitier; J.R. Morante; E. Scheid

1997-01-01T23:59:59.000Z

418

Photovoltaic effect in transition metal modified polycrystalline BiFeO3 thin films  

Science Journals Connector (OSTI)

We report photovoltaic (PV) effect in multiferroic Bi0.9Sm0.1Fe0.95Co0.05O3 (BSFCO) thin films. Transition metal modified polycrystalline BiFeO3 (BFO) thin films have been deposited on Pt/TiO2/SiO2/Si substrate successfully through pulsed laser deposition (PLD). PV response is observed under illumination both in sandwich and lateral electrode configurations. The open-circuit voltage (Voc) and the short-circuit current density (Jsc) of the films in sandwich electrode configuration under illumination are measured to be 0.9 V and ?0.051 µA cm?2. Additionally, we report piezoresponse for BSFCO films, which confirms ferroelectric piezoelectric behaviour.

Venkata Sreenivas Puli; Dhiren Kumar Pradhan; Rajesh Kumar Katiyar; Indrani Coondoo; Neeraj Panwar; Pankaj Misra; Douglas B Chrisey; J F Scott; Ram S Katiyar

2014-01-01T23:59:59.000Z

419

Deposition and characterization of polycrystalline silicon films on glass for thin film solar cells  

SciTech Connect (OSTI)

The authors deposit phosphorus-doped, amorphous Si by low pressure chemical vapor deposition and subsequently crystallize the films by furnace annealing at a temperature of 600 C. Optical in-situ monitoring allows one to control the crystallization process. Phosphorus doping leads to faster crystallization and a grain size enhancement with a maximum grain size of 15 {micro}m. Using transmission electron microscopy they find a log-normal grain size distribution in their films. They demonstrate that this distribution not only arises from solid phase crystallization of amorphous Si but also from other crystallization processes based on random nucleation and growth. The log-normal grain size distribution seems to be a general feature of polycrystalline semiconductors.

Bergmann, R.B.; Krinke, J.; Strunk, H.P.; Werner, J.H.

1997-07-01T23:59:59.000Z

420

Thermoelectric properties of polycrystalline In4Se3 and In4Te3  

SciTech Connect (OSTI)

High thermoelectric performance of a single crystal layered compound In{sub 4}Se{sub 3} was reported recently. We present here an electrical and thermal transport property study over a wide temperature range for polycrystalline samples of In{sub 4}Se{sub 3} and In{sub 4}Te{sub 3}. Our data demonstrate that these materials are lightly doped semiconductors, leading to large thermopower and resistivity. Very low thermal conductivity, below 1 W/m K, is observed. The power factors for In{sub 4}Se{sub 3} and In{sub 4}Te{sub 3} are much smaller when compared with state-of-the-art thermoelectric materials. This combined with the very low thermal conductivity results in the maximum ZT value of less than 0.6 at 700 K for In{sub 4}Se{sub 3}.

Shi, Xun [Optimal Inc., Plymouth, Michigan 48170, USA; Cho, Jung Y [GM R& D and Planning, Warren, Michigan; Salvador, James R. [GM R& D and Planning, Warren, Michigan; Yang, Jihui [General Motors Corporation-R& D; Wang, Hsin [Oak Ridge National Laboratory (ORNL)

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Kinetic study of the reaction between nitric oxide and carbon monoxide catalyzed by clean polycrystalline platinum  

SciTech Connect (OSTI)

The kinetics of the platinum catalyzed reaction between NO and CO has been studied under conditions chosen to approximate those observed during operation of catalysts in automotive exhaust gas treatment applications. The catalysts were polycrystalline platinum foils and wires. The reaction was studied over a range of reactant partial pressures of 10 V Torr to 1 Torr and catalyst temperatures of 500 to 1500K. The steady-state kinetics results could not be fit by a simple Langmuir-Hinshelwood kinetic model over all experimental conditions studied. The kinetics at high coverage were most consistent with Langmuir-Hinshelwood kinetics assuming a bimolecular reaction between NO and CO as the rate-limiting step. At high temperature, the Langmuir-Hinshelwood assumption of fast adsorption-desorption equilibrium relative to the surface reaction rate was no longer appropriate and the mechanism of adsorption of NO had to be considered explicitly.

Klein, R.L.

1984-01-01T23:59:59.000Z

422

Crystallization to polycrystalline silicon thin film and simultaneous inactivation of electrical defects by underwater laser annealing  

SciTech Connect (OSTI)

We propose a low-temperature laser annealing method of a underwater laser annealing (WLA) for polycrystalline silicon (poly-Si) films. We performed crystallization to poly-Si films by laser irradiation in flowing deionized-water where KrF excimer laser was used for annealing. We demonstrated that the maximum value of maximum grain size of WLA samples was 1.5 {mu}m, and that of the average grain size was 2.8 times larger than that of conventional laser annealing in air (LA) samples. Moreover, WLA forms poly-Si films which show lower conductivity and larger carrier life time attributed to fewer electrical defects as compared to LA poly-Si films.

Machida, Emi [Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192 (Japan); Research Fellowships of the Japan Society for the Promotion of Science, Japan Society for the Promotion of Science, 1-8 Chiyoda, Tokyo 102-8472 (Japan); Horita, Masahiro; Ishikawa, Yasuaki; Uraoka, Yukiharu [Graduate School of Materials Science, Nara Institute of Science and Technology, 8916-5 Takayama-cho, Ikoma, Nara 630-0192 (Japan); Core Research for Evolutional Science and Technology, Japan Science and Technology Agency, Honcho, Kawaguchi, Saitama 332-0012 (Japan); Ikenoue, Hiroshi [Graduate School of Information Science and Electrical Engineering, Kyushu University, 744 Motooka Nishi-ku, Fukuoka 819-0395 (Japan)

2012-12-17T23:59:59.000Z

423

Plasma etching of cavities into diamond anvils for experiments at high pressures and high temperatures  

SciTech Connect (OSTI)

We describe a method for precisely etching small cavities into the culets of diamond anvils for the purpose of providing thermal insulation for samples in experiments at high pressures and high temperatures. The cavities were fabricated using highly directional oxygen plasma to reactively etch into the diamond surface. The lateral extent of the etch was precisely controlled to micron accuracy by etching the diamond through a lithographically fabricated tungsten mask. The performance of the etched cavities in high-temperature experiments in which the samples were either laser heated or electrically heated is discussed.

Weir, S.T.; Cynn, H.; Falabella, S.; Evans, W.J.; Aracne-Ruddle, C.; Farber, D.; Vohra, Y.K. (LLNL); (UAB)

2012-10-23T23:59:59.000Z

424

Measurements and Studies of Secondary Electron Emission of Diamond Amplified Photocathode  

SciTech Connect (OSTI)

The Diamond Amplified Photocathode (DAP) is a novel approach to generating electrons. By following the primary electron beam, which is generated by traditional electron sources, with an amplifier, the electron beam available to the eventual application is increased by 1 to 2 orders of magnitude in current. Diamond has a very wide band gap of 5.47eV which allows for a good negative electron affinity with simple hydrogenation, diamond can hold more than 2000MV/m field before breakdown. Diamond also provides the best rigidity among all materials. These two characters offer the capability of applying high voltage across very thin diamond film to achieve high SEY and desired emission phase. The diamond amplifier also is capable of handling a large heat load by conduction and sub-nanosecond pulse input. The preparation of the diamond amplifier includes thinning and polishing, cleaning with acid etching, metallization, and hydrogenation. The best mechanical polishing available can provide high purity single crystal diamond films with no less than 100 {micro}m thickness and <15 nm Ra surface roughness. The ideal thickness for 700MHz beam is {approx}30 {micro}m, which requires further thinning with RIE or laser ablation. RIE can achieve atomic layer removal precision and roughness eventually, but the time consumption for this procedure is very significant. Laser ablation proved that with <266nm ps laser beam, the ablation process on the diamond can easily achieve removing a few microns per hour from the surface and <100nm roughness. For amplifier application, laser ablation is an adequate and efficient process to make ultra thin diamond wafers following mechanical polishing. Hydrogenation will terminate the diamond surface with monolayer of hydrogen, and form NEA so that secondary electrons in the conduction band can escape into the vacuum. The method is using hydrogen cracker to strike hydrogen atoms onto the bare diamond surface to form H-C bonds. Two independent experiments were carried out to determine the transport of the electrons within the diamond and their emission at the surface. In transmission mode measurements, the diamond amplifier was coated with metal on both sides, so results simply depend only on the electron transport within the diamond. The SEY for this mode provides one secondary electron per 20eV energy, which gives the gain of more than 200 for 4.7keV (effective energy) primary electrons under 2MV/m. Laser detrapping can help the signal maintain the gain with lops pulse and duty cycle of 1.67 x 10{sup -7}. In emission mode measurements, in which the diamond is prepared as in the actual application, the SEY is {approx}20 for 700eV (effective energy) primary electrons under 1.21MV/m. The electric field applied and the primary electron energy is limited by the experiment setup, but the results show good trend toward large gain under high field. Thermal emittance of the diamond secondary emission is critical for the beam application. A careful design is setup to measure with very fine precision and accuracy of 0.01eV.

Wu,Q.

2008-10-01T23:59:59.000Z

425

News From the D.C. Office: Lubricating the Market for Energy-Efficient  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 Aerial view of Washington D.C. 3 Aerial view of Washington D.C. News From the D.C. Office Lubricating the Market for Energy-Efficient Products: Snake Oil vs. Slick Databases A handful of tools are essential for those involved in analyzing energy-efficiency policies or designing and implementing programs, no matter what their area of interest or institutional or individual role. My own short list includes: Detailed information on the structure of energy end-use and market trends. Empirical data that document the real-world performance of technologies and programs. Simulation models that use these data to shed light on the future impact of policies and programs. Accessible, accurate information on the efficiency, costs, and other characteristics of energy-efficient products. My colleagues could certainly add to this list, but for now I want to focus

426

A new emergency lubricating-oil system for steam turbine generators: Final report  

SciTech Connect (OSTI)

A positive-displacement pump, powered by a turbine-shaft driven permanent magnet generator (PMG) can be used to provide lubricating oil over nearly the entire turbine generator speed range. The concept offers high reliability through its simplicity; switchgear, batteries and other auxiliaries are eliminated by hard-wiring the PMG to the pump induction drive motor. In this study, an existing PMG supplying power to the electrohydraulic control (EHC) system was evaluated as the power supply for an induction motor-driven screw pump running in a ''wafting'' mode as a backup to a conventional dc emergency oil system. The screw pump rotates all the time that the turbine shaft turns; check valves allow it to deliver oil instantly if the system pressure falls. It was found that the pump drive motor would start and run reliably with no adverse effects on the PMG or the electrohydraulic control (EHC) system. 6 refs., 23 figs., 11 tabs.

Kalan, G.L.; Oney, W.R.; Steenburgh, J.H.; Elwell, R.C.

1987-04-01T23:59:59.000Z

427

Effects of self-assembled monolayer and PFPE lubricant on wear characteristics of flat silicon tips.  

SciTech Connect (OSTI)

The effects of self-assembled monolayer (SAM) and perfluoropolyether (PFPE) lubricant on the wear characteristics of flat silicon tips were investigated. The wear test consisted of sliding the silicon tips fabricated on a flat silicon specimen against SAM and PFPE (Z-tetraol) coated silicon (100) wafer. The tips were slid at a low speed for about 15 km under an applied load of 39.2 {micro}N. The wear volume of the tip was obtained by measuring the tip profile using an Atomic Force Microscope (AFM). It was found that the coatings were effective in reducing the wear of the tips by an order of magnitude from 10{sup -6} to 10{sup -7}.

Kim, H. J.; Jang, C. E.; Kim, D. E.; Kim, Y. K.; Choa, S. H.; Hong, S.; Materials Science Division; Yonsei Univ.; Samsung Adv. Inst. Science and Technology; Seoul National Univ. of Technology

2009-01-01T23:59:59.000Z

428

Closed-loop study of the effects of multicycle re-refining of automotive lubricating oil  

SciTech Connect (OSTI)

Twenty-five gallons of a hydrofinished virgin lubricating oil basestock was blended with additives into a 10W30 crankcase oil. After the engines had been pruged with a flush oil, 11 vehicles were charged with the blended virgin oil. Mileages ranging from 2000 to over 3000 miles of use were accumulated before the oil was drained, re-refined and recharged to the vehicles. This cycle was repeated until the oil had been re-refined three times. At each stage, detailed analyses and compound characterizations were performed on both the oil being recycled and on the same oil which was re-refined but never charged to vehicles. The data showed no significant change in the composition of the base oil, except for a minor buildup of additive base oil, which was expected.

Reynolds, J.W.; Goetzinger, J.W.; Cotton, F.O.; Brinkman, D.W.; Whisman, M.L.

1982-03-01T23:59:59.000Z

429

Theory of a Possible Mechanism for Lubrication and Surface Protection by an Electrically Neutral Hydrogels  

E-Print Network [OSTI]

It is demonstrated that polymers sticking out of the surface of a neutral hydrogel are capable of preventing adhesive forces from pulling a hydrogel into close contact with a surface against which it is pressed. The proposed mechanism for lubrication or surface protection suggests a possible mechanism for protecting the cornea from a contact lens, which is held against the eye by Laplace pressure. This mechanism, however, is only able to keep a gel coated surface from sticking to a surface against which it is pressed, if the gel and surface are bathed in fluid. Expected optical properties of the gel-surface interface are discussed, in order to suggest possible ways to study the gel-solid interface experimentally.

J. B. Sokoloff

2014-09-18T23:59:59.000Z

430

Thickness and density of adsorbed additive layer on metal surface in lubricant by neutron reflectometry  

Science Journals Connector (OSTI)

The thickness and density of the adsorbed additive layer on a metal surface in lubricant were directly measured by neutron reflectometry. First, two kinds of metal surfaces, iron and copper, on ultra-flat silicon blocks were prepared by physical vapor deposition. After that, each target surface was analyzed by neutron reflectometry in air, in base oil and in base oil with an additive. Poly-alpha-olefin was used as the base oil, while deuterated acetic acid was used as an additive. Fitting operation based on Parratt's theory showed that the thicknesses of the adsorbed layers on the iron and copper surfaces were quite thin, only 2.0 nm. The friction coefficients of the metal surfaces measured by a ball-on-disk tribometer decreased considerably when the acetic acid was added to the base oil. It was concluded that the additive adsorbed layers on the metal surfaces considerably affected friction properties despite being only several nanometers thick.

Tomoko Hirayama; Takashi Torii; Yohei Konishi; Masayuki Maeda; Takashi Matsuoka; Kazuko Inoue; Masahiro Hino; Dai Yamazaki; Masayasu Takeda

2012-01-01T23:59:59.000Z

431

Renewable Fuels and Lubricants (ReFUEL) Laboratory (Fact Sheet), NREL (National Renewable Energy Laboratory)  

Alternative Fuels and Advanced Vehicles Data Center [Office of Energy Efficiency and Renewable Energy (EERE)]

Office of Energy Efficiency and Renewable Energy, operated by the Alliance for Sustainable Energy, LLC. The Renewable Fuels and Lubricants (ReFUEL) Laboratory at the U.S. Department of Energy (DOE) National Renewable Energy Laboratory (NREL) is a state-of-the-art research and testing facility for advanced fuels and vehicles. Research and development aims to improve vehicle efficiency and overcome barriers to the increased use of renewable diesel and other nonpetroleum-based fuels, such as biodiesel and synthetic diesel derived from biomass. The ReFUEL Laboratory features a chassis dynamometer for vehicle performance and emissions research, two engine dynamometer test cells for advanced fuels research, and precise emissions analysis equipment. As a complement to

432

Development of Designer Diamond Anvils for High Pressure-High-Temperature Experiments in Support of the Stockpile Stewardship Program  

SciTech Connect (OSTI)

The focus of this program at the University of Alabama at Birmingham (UAB) is to develop the next generation of designer diamond anvils that can perform simultaneous joule heating and temperature profile measurements in a diamond anvil cell. A series of tungsten-rhenium thermocouples will be fabricated onto to the anvil and encapsulated by a chemical vapor deposited diamond layer to allow for a complete temperature profile measurement across the anvil. The tip of the diamond anvil will be engineered to reduce the thermal conductivity so that the tungsten-heating coils can be deposited on top of this layer. Several different approaches will be investigated to engineer the tip of the diamond anvil for reduction in thermal conductivity (a) isotopic mixture of 12C and 13C in the diamond layer, (b) doping of diamond with impurities (nitrogen and/or boron), and (c) growing diamond in a higher concentration of methane in hydrogen plasma. Under this academic alliance with Lawrence Livermore National Laboratory (LLNL), PI and his graduate students will use the lithographic and diamond polishing facility at LLNL. This proposed next generation of designer diamond anvils will allow multi-tasking capability with the ability to measure electrical, magnetic, structural and thermal data on actinide materials with unparallel sensitivity in support of the stockpile stewardship program.

Yogesh K. Vohra

2005-05-12T23:59:59.000Z

433

Microsoft Word - DiamondB_Easement_CX.doc  

Broader source: Energy.gov (indexed) [DOE]

16, 2011 16, 2011 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Cecilia Brown Project Manager - KEWM-4 Proposed Action: Provision of funds to Montana Fish, Wildlife & Parks to purchase the Diamond B conservation easement. Fish and Wildlife Project No.: 2008-800-00 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.25 Transfer, lease, disposition or acquisition of interests in uncontaminated land for habitat preservation or wildlife management, and only associated buildings that support these purposes. Uncontaminated means that there will be no potential for release of substances at a level, or in a form, that would pose a threat to public health or the environment. Location: Township 28N, Range 20W, Sections 28 and 33 in Flathead County, MT

434

Ultrananocrystalline diamond thin films functionalized with therapeutically active collagen networks.  

SciTech Connect (OSTI)

The fabrication of biologically amenable interfaces in medicine bridges translational technologies with their surrounding biological environment. Functionalized nanomaterials catalyze this coalescence through the creation of biomimetic and active substrates upon which a spectrum of therapeutic elements can be delivered to adherent cells to address biomolecular processes in cancer, inflammation, etc. Here, we demonstrate the robust functionalization of ultrananocrystalline diamond (UNCD) with type I collagen and dexamethasone (Dex), an anti-inflammatory drug, to fabricate a hybrid therapeutically active substrate for localized drug delivery. UNCD oxidation coupled with a pH-mediated collagen adsorption process generated a comprehensive interface between the two materials, and subsequent Dex integration, activity, and elution were confirmed through inflammatory gene expression assays. These studies confer a translational relevance to the biofunctionalized UNCD in its role as an active therapeutic network for potent regulation of cellular activity toward applications in nanomedicine.

Huang, H.; Chen, M.; Bruno, P.; Lam, R.; Robinson, E.; Gruen, D.; Ho, D.; Materials Science Division; Northwestern Univ.

2009-01-01T23:59:59.000Z

435

Calculations of electronic states in ultrasmall quantum boxes of diamond  

Science Journals Connector (OSTI)

The electronic structure of ultrasmall quantum boxes (QBs) of diamond with (110) ( 1 1 ¯ 0 ) and (001) planes saturated by hydrogen is calculated using the extended Hückel-type nonorthogonal tight-binding method. It is shown that in contrast to the QBs with the ideal surfaces which show a clear dependence of the lowest unoccupied molecular orbital (LUMO) energy on the size variation along the [001] direction the energy of the LUMO state in the QBs with a monohydrogenated dimer on the (001) surface depends little on the size variation in agreement with the experiment. It is found that the LUMO state in the latter is surfacelike in character and associated with backbonds of the surface dimers. It is also demonstrated that optical transitions across the energy gap exhibit significant oscillator strength.

Masahiko Nishida

2008-01-01T23:59:59.000Z

436

Diamond Amplified Photocathode at BNL | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

Diamond Amplified Photocathode at BNL Diamond Amplified Photocathode at BNL Nuclear Physics (NP) NP Home About Research Facilities Science Highlights Benefits of NP Spinoff Applications Spinoff Archives SBIR/STTR Applications of Nuclear Science and Technology Funding Opportunities Nuclear Science Advisory Committee (NSAC) News & Resources Contact Information Nuclear Physics U.S. Department of Energy SC-26/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3613 F: (301) 903-3833 E: sc.np@science.doe.gov More Information » Spinoff Archives Diamond Amplified Photocathode at BNL Print Text Size: A A A RSS Feeds FeedbackShare Page Application/instrumentation: Diamond amplified photocathode Developed at: Brookhaven National Laboratory, New York Developed in: 2004-2007 Result of NP research:

437

Reactive ion etching: Optimized diamond membrane fabrication for transmission electron microscopy  

E-Print Network [OSTI]

Commonly used preparation method for thin diamond membranes by focused ion beam (FIB) techniques results in surface damage. Here, the authors introduce an alternative method based on reactive ion etching (RIE). To compare ...

Li, Luozhou

438

Large prolongation of free-exciton photoluminescence decay in diamond by two-photon excitation  

Science Journals Connector (OSTI)

We report on time-resolved photoluminescence of a free-exciton in IIa chemical vapor deposition diamond crystal. Large difference between decay times for one- and two-photon excitation...

Kozák, Martin; Trojánek, František; Malý, Petr

2012-01-01T23:59:59.000Z

439

Rheological response and dynamics of the amphiphilic diamond phase from kinetic lattice–Boltzmann simulations  

Science Journals Connector (OSTI)

...diamond phase from kinetic lattice-Boltzmann simulations R.S. Saksena...are performed using a kinetic lattice-Boltzmann method. Lyotropic liquid crystals...studied previously using our lattice-Boltzmann (LB) approach (Gonzalez-Segredo...

2009-01-01T23:59:59.000Z

440

Thermodynamic modelling of Cr-bearing garnets with implications for diamond inclusions and peridotite xenoliths  

E-Print Network [OSTI]

, Zürich, Switzerland e Geological Survey of Western Australia, Mineral House, 100 Plain Street, East Perth zonations result from metasomatic processes. This sheds further light on peridotitic diamond inclusions

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Growth and electrical characterisation of {delta}-doped boron layers on (111) diamond surfaces  

SciTech Connect (OSTI)

A plasma enhanced chemical vapor deposition protocol for the growth of {delta}-doping of boron in diamond is presented, using the (111) diamond plane as a substrate for diamond growth. AC Hall effect measurements have been performed on oxygen terminated {delta}-layers and desirable sheet carrier densities ({approx}10{sup 13} cm{sup -2}) for field-effect transistor application are reported with mobilities in excess of what would expected for equivalent but thicker heavily boron-doped diamond films. Temperature-dependent impedance spectroscopy and secondary ion mass spectroscopy measurements show that the grown layers have metallic-like electrical properties with high cut-off frequencies and low thermal impedance activation energies with estimated boron concentrations of approximately 10{sup 20} cm{sup -3}.

Edgington, Robert; Jackman, Richard B. [London Centre for Nanotechnology, and Department of Electronic and Electrical Engineering, University College London, 17-19 Gordon Street, London, WC1H 0AH (United Kingdom); Sato, Syunsuke; Ishiyama, Yuichiro; Kawarada, Hiroshi [Department of Electronic and Photonic Systems, Waseda University, Okubo 3-4-1, Shinjuku, Tokyo 169-8555 (Japan); Morris, Richard [Advanced SIMS Projects, Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom)

2012-02-01T23:59:59.000Z

442

Evaluation of traffic operations at diamond interchanges using advanced actuated control  

E-Print Network [OSTI]

This thesis documents an operational analysis of ographics. advanced actuated traffic control at signalized diamond interchanges. The study attempts to determine the benefits a "flexible'' phasing strategy provides to the interchange. Flexible...

Koonce, Peter John Vincent

1998-01-01T23:59:59.000Z

443

Optical data of meteoritic nano-diamonds from far-ultraviolet to far-infrared wavelengths  

E-Print Network [OSTI]

We have used different spectroscopic techniques to obtain a consistent quantitative absorption spectrum of a sample of meteoritic nano-diamonds in the wavelength range from the vacuum ultraviolet (0.12 $\\mu$m) to the far infrared (100 $\\mu$m). The nano-diamonds have been isolated by a chemical treatment from the Allende meteorite (Braatz et al.2000). Electron energy loss spectroscopy (EELS) extends the optical measurements to higher energies and allows the derivation of the optical constants (n & k) by Kramers-Kronig analysis. The results can be used to restrain observations and to improve current models of the environment where the nano-diamonds are expected to have formed. We also show that the amount of nano-diamond which can be present in space is higher than previously estimated by Lewis et al. (1989).

H. Mutschke; A. C. Andersen; C. Jaeger; Th. Henning; A. Braatz

2004-08-10T23:59:59.000Z

444

Many-electron states of nitrogen-vacancy centers in diamond and spin density calculations  

E-Print Network [OSTI]

Using a generalized Hubbard Hamiltonian, many-electron calculations of energy levels and corresponding wave functions of negatively charged and neutral nitrogen-vacancy centers in diamond were reported. The energies, ...

Ranjbar, Ahmad

445

Quantum nano optics of defect centers in diamond and h-BN with nano-cathodoluminescence  

Science Journals Connector (OSTI)

We have developed a cathodoluminescence-based single photon emitter detection scheme with deep subwavelength resolution. Application to NV0 centers in diamond and a new type of emitter...

Meuret, Sophie; Tizei, Luiz H; Blazit, Jean-Denis; Bourrellier, Romain; Tencé, Marcel; Zobelli, Alberto; Kociak, Mathieu

446

Interactions between nano-spacing flying head sliders and ultra-thin liquid lubricant films with non-uniform distribution in hard disk drives  

Science Journals Connector (OSTI)

This paper describes the effect of ultra-thin liquid lubricant films on air bearing dynamics and flyability of less than 10 nm spacing flying head sliders in hard disk drives. In particular, the effect of non-uni...

Norio Tagawa; Noritaka Yoshioka; Atsunobu Mori

2005-08-01T23:59:59.000Z

447

The Effect of PFPE Film Thickness and Molecular Polarity on the Pick-Up of Disk Lubricant by a Low-Flying Slider  

Science Journals Connector (OSTI)

Lubricant pick-up by a low-flying slider is investigated for hydroxyl-terminated perfluoropolyethers ... film thickness on the surface of finished rigid disks. The total number of hydroxyl (OH) ... , and ZTMD, re...

R. J. Waltman; H. Deng; G. J. Wang; H. Zhu; G. W. Tyndall

2010-08-01T23:59:59.000Z

448

On the nature and removal of saw marks on diamond wire sawn multicrystalline silicon wafers  

Science Journals Connector (OSTI)

Abstract Clearly visible saw marks are a significant barrier to commercial use of diamond wire sawn multicrystalline silicon wafers for solar cells. Two types of saw marks on the diamond-cut multicrystalline silicon wafers are identified—the millimeter scale round-run fringes caused by round-running of the saw wires, and the micron scale scratches caused by scribing of the diamond tips. The latter consists of smooth and shiny grooves covered by a thin layer of amorphous phase. The micro-roughness of diamond-cut wafers is actually ~25% less than that of the conventional slurry-cut wafers. The reason for the visibility of the round-run fringes to naked eyes, and for the relatively rough appearance of diamond-cut wafers, is the visual enhancement from the shiny scratches. Therefore, the key to remove the round-run fringes is to roughen the smooth grooves, as flattening the very slightly sloped fringe zones is very difficult due to lack of chemical contrast over them. Acid-etching texturization cannot remove the saw marks on the diamond-cut silicon wafers. Alkaline-etching can only remove the saw marks on grains near (0 0 1) orientation. A vapor blast etching method has been attempted. The preliminary result is encouraging—complete removal of the saw marks has been achieved, along with a good surface texture, which reduces the light reflectivity to 19%.

Wenhao Chen; Xiaomei Liu; Miao Li; Chuanqiang Yin; Lang Zhou

2014-01-01T23:59:59.000Z

449

Pulsed ion beam methods for in situ characterization of diamond film deposition processes  

SciTech Connect (OSTI)

Diamond and diamond-like carbon (DLC) have properties which in principle make them ideally suited to a wide variety of thin-film applications. Their widespread use as thin films, however, has been limited for a number of reasons related largely to the lack of understanding and control of the nucleation and growth processes. Real-time, in situ studies of the surface of the growing diamond film are experimentally difficult because these films are normally grown under a relatively high pressure of hydrogen, and conventional surface analytical methods require an ultrahigh vacuum environment. It is believed, however, that the presence of hydrogen during growth is necessary to stabilize the corrugated diamond surface structure and thereby prevent the formation of the graphitic phase. Pulsed ion beam-based analytical methods with differentially pumped ion sources and particle detectors are able to characterize the uppermost atomic layer of a film during, growth at ambient pressures 5-7 orders of magnitude higher than other surface-specific analytical methods. We describe here a system which has been developed for the purpose of determining the hydrogen concentration and bonding sites on diamond surfaces as a function of sample temperature and ambient hydrogen pressure under hot filament CVD growth conditions. It is demonstrated that as the hydrogen partial pressure increases, the saturation hydrogen coverage of the surface of a CVD diamond film increases, but that the saturation level depends on the atomic hydrogen concentration and substrate temperature.

Krauss, A.R.; Smentkowski, V.S.; Zuiker, C.D.; Gruen, D.M. [Argonne National Lab., IL (United States); Im, J. [Argonne National Lab., IL (United States)]|[Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering; Schultz, J.A.; Waters, K. [Ionwerks Corp., Houston, TX (United States); Chang, R.P.H. [Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering

1995-06-01T23:59:59.000Z

450

Interfacial chemical bonding state and band alignment of CaF{sub 2}/hydrogen-terminated diamond heterojunction  

SciTech Connect (OSTI)

CaF{sub 2} films are deposited on hydrogen-terminated diamond (H-diamond) by a radio-frequency sputter-deposition technique at room temperature. Interfacial chemical bonding state and band alignment of CaF{sub 2}/H-diamond heterojunction are investigated by X-ray photoelectron spectroscopy. It is confirmed that there are only C-Ca bonds at the CaF{sub 2}/H-diamond heterointerface. Valence and conductance band offsets of the CaF{sub 2}/H-diamond heterojunciton are determined to be 3.7 {+-} 0.2 and 0.3 {+-} 0.2 eV, respectively. It shows a type I straddling band configuration. The large valence band offset suggests advantage of the CaF{sub 2}/H-diamond heterojunciton for the development of high power and high frequency field effect transistors.

Liu, J. W.; Liao, M. Y.; Cheng, S. H.; Imura, M. [Optical and Electronic Materials Unit, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Koide, Y. [Optical and Electronic Materials Unit, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Nanofabrication Platform, NIMS, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan); Center of Materials Research for Low Carbon Emission (CMRLC), NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)

2013-03-28T23:59:59.000Z

451

Appropriate materials and preparation techniques for polycrystalline-thin-film thermophotovoltaic cells  

Science Journals Connector (OSTI)

Polycrystalline-thin-film thermophotovoltaic (TPV) cells have excellent potential for reducing the cost of TPV generators so as to address the hitherto inaccessible and highly competitive markets such as self-powered gas-fired residential warm air furnaces and energy-efficient electric cars etc. Recent progress in polycrystalline-thin-film solar cells have made it possible to satisfy the diffusion length and intrinsic junction rectification criteria for TPV cells operating at high fluences. Continuous ranges of direct bandgaps of the ternary and pseudoternary compounds such as Hg 1?x Cd x Te Pb 1?x Cd x Te Hg 1?x Zn x Te and Pb 1?x Zn x S cover the region of interest of 0.50–0.75 eV for efficient TPV conversion. Other ternary and pseudoternary compounds which show direct bandgaps in most of or all of the 0.50–0.75 eV range are Pb 1?x Zn x Te Sn 1?x Cd 2x Te 2 Pb 1?x Cd x Se Pb 1?x Zn x Se and Pb 1?x Cd x S . Hg 1?x Cd x Te (with x?0.21 ) has been studied extensively for infrared detectors. PbTe and Pb 1?x Sn x Te have also been studied for infrared detectors. Not much work has been carried out on Hg 1?x Zn x Te thin films. Hg 1?x Cd x Te and Pb 1?x Cd x Te alloys cover a wide range of cut-off wavelengths from the far infrared to the near visible. Acceptors and donors are introduced in these materials by excess non-metal (Te) and excess metal (Hg and Pb) respectively. Extrinsic acceptor impurities are Cu Au and As while and In and Al are donor impurities. Hg 1?x Cd x Te thin films have been deposited by isothermal vapor-phase epitaxy (VPE) liquid phase epitaxy (LPE) hot-wall metalorganic chemical vapor deposition (MOCVD) electrodeposition sputtering molecular beam epitaxy (MBE) laser-assisted evaporation and vacuum evaporation with or without hot-wall enclosure. The challenge in the preparation of Hg 1?x Cd x Te is to provide excess mercury incidence rate to optimize the deposition parameters for enhanced mercury incorporation and to achieve the requisite stoichiometry grain size and doping. MBE and MOCVD techniques have paved the way for obtaining epitaxial Hg 1?x Cd x Te thin films at substrate temperatures of ?180?° C with the desired crystalline perfection stoichiometry and doping without the necessity of further annealing for improving either the crystalline quality or dopant activity. Retaining larger mercury proportions during annealing would require heated enclosures as in isothermal VPE hot-wall technique vacuum evaporation hot-wall MOCVD or close-space sublimation. Pb 1?x Cd x Te thin films can be prepared by magnetron sputtering from cooled Pb 1?x Cd x Te targets on heated substrates. Hot-wall technique is suitable for the deposition of Pb 1?x Cd x Te thin films. Hg 1?x Cd x Te and Pb 1?x Cd x Te TPV cells will benefit from the substantial work on CdTe thin film solar cells. The paper reviews work on thin films of ternary and pseudoternary compounds of interest for TPV conversion and methods of their preparation with a view to choosing the appropriate materials and fabrication techniques for polycrystalline-thin-film TPV cells.

Neelkanth G. Dhere

1997-01-01T23:59:59.000Z

452

Interdiffusion and impurity diffusion in polycrystalline Mg solid solution with Al or Zn  

SciTech Connect (OSTI)

Interdiffusion and impurity diffusion in Mg binary solid solutions, Mg(Al) and Mg(Zn) were investigated at temperatures ranging from 623 to 723 K. Interdiffusion coef cients were determined via the Boltzmann Matano Method using solid-to-solid diffusion couples assembled with polycrystalline Mg and Mg(Al) or Mg(Zn) solid solutions. In addition, the Hall method was employed to extrapolate the impurity diffusion coef cients of Al and Zn in pure polycrystalline Mg. For all diffusion couples, electron micro-probe analysis was utilized for the measurement of concentration pro les. The interdiffusion coef cient in Mg(Zn) was higher than that of Mg(Al) by an order of magnitude. Additionally, the interdiffusion coef cient increased signi cantly as a function of Al content in Mg(Al) solid solution, but very little with Zn content in Mg(Zn) solid solution. The activation energy and pre-exponential factor for the average effective interdiffusion coef cient in Mg(Al) solid solution were determined to be 186.8 ( 0.9) kJ/mol and 7.69 x 10-1 ( 1.80 x 10-1) m2/s, respectively, while those determined for Mg(Zn) solid solution were 139.5 ( 4.0) kJ/mol and 1.48 x 10-3 ( 1.13 x 10-3) m2/s. In Mg, the Zn impurity diffusion coef cient was an order of magnitude higher than the Al impurity diffusion coef cient. The activation energy and pre-exponential factor for diffusion of Al impurity in Mg were determined to be 139.3 ( 14.8) kJ/mol and 6.25 x 10-5 ( 5.37 x 10-4) m2/s, respectively, while those for diffusion of Zn impurity in Mg were determined to be 118.6 ( 6.3) kJ/mol and 2.90 x 10-5 ( 4.41 x 10-5) m2/s.

Kammerer, Catherine [University of Central Florida, Orlando; Kulkarni, Nagraj S [ORNL; Warmack, Robert J Bruce [ORNL; Sohn, Yong Ho [University of Central Florida

2014-01-01T23:59:59.000Z

453

Evaluation of high-temperature lubricants for low-heat rejection diesel engines. Interim report, October 1983-March 1988  

SciTech Connect (OSTI)

A single-cylinder diesel engine was modified to simulate a low-heat rejection (LHR) engine, and it was used to develop lubrication requirements for future Army LHR diesel engines. Several high-temperature lubricant (HTL) candidates were evaluated, and the simulated LHR engine discriminated HTL deposition performance over a range of engine cylinder wall temperatures (CWTs). Three HTLs were identified that had promising performance at CWTs of 600 deg F (316 deg C) while none were adequate at 650 deg F (343 deg C). Oil was collected and analyzed from the ring zone of the simulated LHR engine. Oil degradation was as much as 3.7 times more severe in the ring zone as compared to the oil sump. Preliminary oxidation and friction-wear bench tests were investigated. New and used oil analyses flow charts were developed, and analytical techniques to separate and identify HTL additives and base stocks were developed.

Frame, E.A.

1992-09-01T23:59:59.000Z

454

Photovoltaic properties of ferroelectric solar cells based on polycrystalline BiFeO3 films sputtered on indium tin oxide substrates  

Science Journals Connector (OSTI)

To study the ferroelectric photovoltaic effect based on polycrystalline films, preparation of...3 (BFO) thin films with extremely large remnant polarization (2P r = 180 C/cm2...) were successfully d...

JianNing Ding; MengJiao Chen; JianHua Qiu…

2014-08-01T23:59:59.000Z

455

Two dimensional electron gases in polycrystalline MgZnO/ZnO heterostructures grown by rf-sputtering process  

SciTech Connect (OSTI)

This paper reports the formation of two-dimensional electron gas (2DEG) in rf-sputtered defective polycrystalline MgZnO/ZnO heterostructure via the screening of grain boundary potential by polarization-induced charges. As the MgZnO thickness increases, the sheet resistance reduces rapidly and then saturates. The enhancement of the interfacial polarization effect becomes stronger, corresponding to a larger amount of resistance reduction, when the Mg content in the cap layer increases. Monte Carlo method by including grain boundary scattering effect as well as 2D finite-element-method Poisson and drift-diffusion solver is applied to analyze the polycrystalline heterostructure. The experimental and Monte Carlo simulation results show good agreement. From low temperature Hall measurement, the carrier density and mobility are both independent of temperature, indicating the formation of 2DEG with roughness scattering at the MgZnO/ZnO interface.

Chin, Huai-An; Cheng, I-Chun; Huang, Chih-I; Wu, Yuh-Renn [Department of Electrical Engineering and Graduate Institute of Photonics and Optoelectronics, National Taiwan University, Taipei 10617, Taiwan (China); Lu, Wen-Sen; Lee, Wei-Li [Institute of Physics, Academia Sinica, Taipei 11529, Taiwan (China); Chen, Jian Z. [Institute of Applied Mechanics, National Taiwan University, Taipei 10617, Taiwan (China); Chiu, Kuo-Chuang; Lin, Tzer-Shen [Material and Chemical Research Laboratories, Industrial Technology Research Institute, Hsinchu 31040, Taiwan (China)

2010-09-15T23:59:59.000Z

456

Asymptotic and intermediate long-time behavior of nuclear free induction decays in polycrystalline solids and powders  

Science Journals Connector (OSTI)

Free induction decay (FID) measured by nuclear magnetic resonance in a polycrystalline solid is the isotropic average of the FIDs for individual single crystallites. It has been recently proposed theoretically and verified experimentally that the long-time behavior of single-crystal FIDs has the universal form of exponentially decaying sinusoidal oscillations. Polycrystalline averaging complicates the situation theoretically, while the available experimental evidence is also ambiguous. Exponentially decaying sinusoidal oscillations have been observed for 129Xe in polycrystalline solid xenon but not for 19F in a powder of CaF2. In this paper, we present first-principles FID calculations for powders of both CaF2 and solid xenon. In both cases, the asymptotic long-time behavior has the expected form of exponentially decaying sinusoidal oscillations, which is determined by the single-crystallite FID with the slowest exponential decay. However, this behavior appears only at rather small values of the signal that have not yet been measured in experiments. At intermediate times accessible experimentally, a polycrystalline FID depends on the distribution of the exponential decay constants and oscillation frequencies for single-crystallite FIDs. In CaF2, these parameters are relatively broadly distributed, and as a result the sinusoidal long-time oscillations become somewhat washed out. In contrast, the single-crystallite parameters are more clustered in solid xenon, and, as a result, the experimentally observable range is characterized by a well-defined oscillation frequency and exponential decay constant, even though neither of these parameters represents the true long-time behavior. The above difference of the intermediate FID behavior originates from the difference of the crystal structures of solid xenon and CaF2.

B. V. Fine; T. A. Elsayed; E. G. Sorte; B. Saam

2012-08-27T23:59:59.000Z

457

Measurement of the Young's modulus and internal friction of single crystal and polycrystalline copper, and copper-graphite composites as a function of temperature and orientation  

E-Print Network [OSTI]

MEASUREMENT OF THE YOUNG'S MODULUS AND INTERNAL FRICTION OF SINGLE CRYSTAL AND POLYCRYSTALLINE COPPER, AND COPPER- GRAPHITE COMPOSITES AS A FUNCTION OF TEMPERATURE AND ORIENTATION A Thesis by S teven Norman Wicks trom Submitted... AND POLYCRYSTALLINE COPPER, AND COPPER- GRAPHITE COMPOSITES AS A FUNCTION OF TEMPERATURE AND ORIENTATION A Thesis by Steven Norman Wickstrom Approved as to style and content by: A(J ~a Alan Wolfenden (Chairman of Committee) Don E. Bray (Member) Donald G...

Wickstrom, Steven Norman

2012-06-07T23:59:59.000Z

458

Atmospheric Plasma Deposition of Diamond-like Carbon Coatings  

SciTech Connect (OSTI)

There is great demand for thin functional coatings in the semiconductor, optics, electronics, medical, automotive and aerospace industries [1-13]. As fabricated components become smaller and more complex, the properties of the materials’ surface take on greater importance. Thin coatings play a key role in tailoring surfaces to give them the desired hardness, wear resistance, chemical inertness, and electrical characteristics. Diamond-like carbon (DLC) coatings possess an array of desirable properties, including outstanding abrasion and wear resistance, chemical inertness, hardness, a low coefficient of friction and exceptionally high dielectric strength [14-22]. Diamond-like carbon is considered to be an amorphous material, containing a mixture of sp2 and sp3 bonded carbon. Based on the percentage of sp3 carbon and the hydrogen content, four different types of DLC coatings have been identified: tetrahedral carbon (ta-C), hydrogenated amorphous carbon (a-C:H) hard, a-C:H soft, and hydrogenated tetrahedral carbon (ta-C:H) [20,24,25]. Possessing the highest hardness of 80 GPa, ta-C possesses an sp3 carbon content of 80 to 88u%, and no appreciable hydrogen content whereas a-C:H soft possesses a hardness of less than 10 GPa, contains an sp3 carbon content of 60% and a hydrogen content between 30 to 50%. Methods used to deposit DLC coatings include ion beam deposition, cathodic arc spray, pulsed laser ablation, argon ion sputtering, and plasma-enhanced chemical vapor deposition [73-83]. Researchers contend that several advantages exist when depositing DLC coatings in a low-pressure environment. For example, ion beam processes are widely utilized since the ion bombardment is thought to promote denser sp3-bonded carbon networks. Other processes, such as sputtering, are better suited for coating large parts [29,30,44]. However, the deposition of DLC in a vacuum system has several disadvantages, including high equipment cost and restrictions on the size and shape of material that may be treated. The deposition of DLC at atmospheric pressure has been demonstrated by several researchers. Izake, et al [53] and Novikov and Dymont [54] have demonstrated an electrochemical process that is carried out with organic compounds such as methanol and acetylene dissolved in ammonia. This process requires that the substrates be immersed in the liquid [53-54]. The atmospheric pressure deposition of DLC was also demonstrated by Kulik, et al. utilizing a plasma torch. However, this process requires operating temperatures in excess of 800 oC [55]. In this report, we investigate the deposition of diamond-like carbon films using a low temperature, atmospheric pressure plasma-enhanced chemical vapor deposition (PECVD) process. The films were characterized by solid-state carbon-13 nuclear magnetic resonance (13C NMR) and found to have a ratio of sp2 to sp3 carbon of 43 to 57%. The films were also tested for adhesion, coefficient of friction, and dielectric strength.

Ladwig, Angela

2008-01-23T23:59:59.000Z

459

Observations of a dynamical-to-kinematic diffraction transition in plastically deformed polycrystalline intermetallic YCu  

SciTech Connect (OSTI)

Unlike most intermetallic compounds, polycrystalline YCu, a B2 (CsCl-type) intermetallic, is ductile at room temperature. The mechanisms for this behavior are not fully understood. In situ neutron diffraction was used to investigate whether a stress-induced phase transformation or twinning contribute to the ductility; however, neither mechanism was found to be active in YCu. Surprisingly, this study revealed that the intensities of the diffraction peaks increased after plastic deformation. It is thought that annealing the samples created nearly perfect crystallinity, and subsequent deformation reduced this high degree of lattice coherency, resulting in a modified mosaic structure that decreased or eliminated the extinction effect. Analysis of changes in diffraction peak intensity showed a region of primary plasticity that exhibits significant changes in diffraction behavior. Fully annealed samples initially contain diffracting volumes large enough to follow the dynamical theory of diffraction. When loaded beyond the yield point, dislocation motion disrupts the lattice perfection, and the diffracting volume is reduced to the point that diffraction follows the kinematic theory of diffraction. Since the sample preparation and deformation mechanisms present in this study are common in numerous material systems, this dynamical to kinematic diffraction transition should also be considered in other diffraction experiments. These measurements also suggest the possibility of a new method of investigating structural characteristics. (C) 2014 Published by Elsevier Ltd. on behalf of Acta Materialia Inc.

Williams, Scott H. [Ames Laboratory; Brown, Donald W. [Los Alamos National Laboratory; Clausen, Bjorn [Los Alamos National Laboratory; Russell, Alan [Ames Laboratory; Gschneidner Jr., Karl A. [Ames Laboratory

2014-03-01T23:59:59.000Z

460

Metastable Electrical Characteristics of Polycrystalline Thin-Film Photovoltaic Modules upon Exposure and Stabilization: Preprint  

SciTech Connect (OSTI)

The significant features of a series of stabilization experiments conducted at the National Renewable Energy Laboratory (NREL) between May 2009 and the present are reported. These experiments evaluated a procedure to stabilize the measured performance of thin-film polycrystalline cadmium telluride (CdTe) and copper indium gallium diselenide (CIGS) thin-film photovoltaic (PV) modules. The current-voltage (I-V) characteristics of CdTe and CIGS thin-film PV devices and modules exhibit transitory changes in electrical performance after thermal exposure in the dark and/or bias and light exposures. We present the results of our case studies of module performance versus exposure: light-soaked at 65 degrees C; exposed in the dark under forward bias at 65 degrees C; and, finally, longer-term outdoor exposure. We find that stabilization can be achieved to varying degrees using either light-soaking or dark bias methods and that the existing IEC 61646 light-soaking interval may be appropriate for CdTe and CIGS modules with one caveat: it is likely that at least three exposure intervals are required for stabilization.

Deline, C. A.; del Cueto, J. A.; Albin, D. S.; Rummel, S. R.

2011-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

Vacuum deposited polycrystalline silicon films for solar cell applications. Quarterly report, September 15-December 31, 1979  

SciTech Connect (OSTI)

Polycrystalline silicon films 14-22 ..mu..m thick and with average grain diameters of 20-40 ..mu..m were deposited by vacuum deposition onto both ceramic and sapphire substrates which were previously coated with a thin (1-2 ..mu..m) TiB/sub 2/ conducting layer. The large grains are the result of an interaction in the initial growth stages between silicon and TiB/sub 2/. SIMS studies of B/Ti/Al/sub 2/O/sub 3/, B/Al/sub 2/O/sub 3/, and Ti/Al/sub 2/O/sub 3/, interactions are reported as part of a continuing investigation of TiB/sub 2/ formation and silicon interactions on the TiB/sub 2/ surface. The increase in grain size has led to an improvement in the open-circuit voltage V/sub oc/, but not to an increase in the short-circuit current J/sub sc/. Capacitance-voltage measurements give results characteristic of an abrupt junction and a build-in voltage V/sub D/ consistent with the measured doping levels. A simple method for measuring the minority carrier diffusion length in the base region L/sub n/ is described. The measurements indicate that there is little change in L/sub n/ between large (20-40 ..mu..m) and small (approx. 5 ..mu..m) grained samples.

Feldman, C.; Arrington, C. H.; Blum, N. A.; Satkiewicz, F. G.

1980-03-01T23:59:59.000Z

462

The Diamond Beamline I13L for Imaging and Coherence  

SciTech Connect (OSTI)

I13L is the first long beamline at Diamond dedicated to imaging and coherence. Two independent branches will operate in the energy range of 6-30 keV with spatial resolution on the micro- to nano-lengthscale. The Imaging branch is dedicated to imaging and tomography with In-line phase contrast and full-field microscopy on the micron to nano-length scale. Ultimate resolution will be achieved on the Coherence branch at I13L with imaging techniques in the reciprocal space. The experimental stations will be located about 250 m from the source, taking advantage of the coherence properties of the source. The beamline has some outstanding features such as the mini-beta layout of the storage ring's straight section. The optical layout is optimized for beam stability and high optical quality to preserve the coherent radiation. In the experimental stations several methods will be available, starting for the first user with in-line phase contrast imaging on the imaging branch and Coherent X-ray Diffraction (CXRD) on the coherence branch.

Rau, C. [Diamond Light Source Ltd., Chilton, Oxfordshire (United Kingdom); Feinberg School of Medicine, Northwestern University, Chicago, Illinois (United States); Wagner, U.; Peach, A.; Singh, B.; Wilkin, G.; Jones, C. [Diamond Light Source Ltd., Chilton, Oxfordshire (United Kingdom); Robinson, I. K. [Diamond Light Source Ltd., Chilton, Oxfordshire (United Kingdom); Laboratory for Nanomaterials, University College London, London, London (United Kingdom)

2010-06-23T23:59:59.000Z

463

Rolling contact fatigue in high vacuum using ion plated nickel-copper-silver solid lubrication  

SciTech Connect (OSTI)

Ion plated, nickel-copper-silver coated steel ball bearings that were tested in rolling contact fatigue (RCF) experiments in high vacuum are presented in this article. ANSI T5 ball bearings were coated with approximately 10 nm of nickel-copper followed by 100 nm of silver using a dc ion plating process. The balls were then tested for RCF in vacuum in the 10{sup -7} Torr range at 130 Hz rotational speed and at 4.1 GPa Hertzian contact stress. The significance of this work is in the extension of RCF testing to an ultrahigh vacuum (UHV) application using silver as a lubricant instead of oil. The effects of pressure and voltage on the ion plating process were also investigated using scanning electron microscopy and RCF life testing in UHV. Test results with a ball size of 5/16 in. in UHV show that deposition at voltages greater than 2.5 kV shortens the RCF life and introduces a unique failure mode. Voltage and pressure fluctuations during the deposition process result in significant thickness monitor measurement errors as well. A regulator control scheme that minimizes the process pressure overshoot is also simulated.

Danyluk, Mike; Dhingra, Anoop [Mechanical Engineering Department, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211-3029 (United States)

2011-01-15T23:59:59.000Z

464

Tribological evaluation of piston skirt/cylinder liner contact interfaces under boundary lubrication conditions.  

SciTech Connect (OSTI)

The friction and wear between the piston and cylinder liner significantly affects the performance of internal combustion engines. In this paper, segments from a commercial piston/cylinder system were tribologically tested using reciprocating motion. The tribological contact consisted of aluminium alloy piston segments, either uncoated, coated with a graphite/resin coating, or an amorphous hydrogenated carbon (a-C : H) coating, in contact with gray cast iron liner segments. Tests were conducted in commercial synthetic motor oils and base stocks at temperatures up to 120 C with a 2 cm stroke length at reciprocating speeds up to 0.15 m s{sup -1}. The friction dependence of these piston skirt and cylinder liner materials was studied as a function of load, sliding speed and temperature. Specifically, an increase in the sliding speed led to a decrease in the friction coefficient below approximately 70 C, while above this temperature, an increase in sliding speed led to an increase in the friction coefficient. The presence of a coating played an important role. It was found that the graphite/resin coating wore quickly, preventing the formation of a beneficial tribochemical film, while the a-C : H coating exhibited a low friction coefficient and provided significant improvement over the uncoated samples. The effect of additives in the oils was also studied. The tribological behaviour of the interface was explained based on viscosity effects and subsequent changes in the lubrication regime, formation of chemical and tribochemical films.

Demas, N. G.; Erck, R. A.; Fenske, G. R.; Energy Systems

2010-03-01T23:59:59.000Z

465

Electron microscopic evidence for a tribologically induced phase transformation as the origin of wear in diamond  

SciTech Connect (OSTI)

Tribological testing of a coarse-grained diamond layer, deposited by plasma-enhanced chemical vapor deposition, was performed on a ring-on-ring tribometer with a diamond counterpart. The origin of the wear of diamond and of the low friction coefficient of 0.15 was studied by analyzing the microstructure of worn and unworn regions by transmission and scanning electron microscopy. In the worn regions, the formation of an amorphous carbon layer with a thickness below 100?nm is observed. Electron energy loss spectroscopy of the C-K ionization edge reveals the transition from sp{sup 3}-hybridized C-atoms in crystalline diamond to a high fraction of sp{sup 2}-hybridized C-atoms in the tribo-induced amorphous C-layer within a transition region of less than 5?nm thickness. The mechanically induced phase transformation from diamond to the amorphous phase is found to be highly anisotropic which is clearly seen at a grain boundary, where the thickness of the amorphous layer above the two differently oriented grains abruptly changes.

Zhang, Xinyi; Schneider, Reinhard; Müller, Erich; Gerthsen, Dagmar [Laboratory for Electron Microscopy, Karlsruhe Institute of Technology (KIT), Engesserstr. 7, D-76131 Karlsruhe (Germany); Mee, Manuel; Meier, Sven [Fraunhofer Institute for Mechanics of Materials IWM, Wöhlerstr. 11, D-79108 Freiburg (Germany); Gumbsch, Peter [Fraunhofer Institute for Mechanics of Materials IWM, Wöhlerstr. 11, D-79108 Freiburg (Germany); Institute for Applied Materials IAM, Karlsruhe Institute of Technology (KIT), Kaiserstr. 12, D-76131 Karlsruhe (Germany)

2014-02-14T23:59:59.000Z

466

Effects of thickness and cycle parameters on fretting wear behavior of CVD diamond coatings on steel substrates  

E-Print Network [OSTI]

of low friction, high hardness, high wear resistance, as well as promising corrosion resistance. © 2010 of thermal expansion between diamond and steel may induce high stress within the deposited diamond films c a School of Materials Science and Engineering, Central South University, Changsha, 410083, PR

Bristol, University of

467

RHONEY, BRIAN KEITH. Cylindrical Wire Electrical Discharge Truing of Metal Bond Diamond Grinding Wheels. (Under the direction of Albert Shih)  

E-Print Network [OSTI]

Electrical Discharge Machining (EDM) to profile a metal bond diamond grinding wheel, and then study the wear to rotate the wheel inside a traditional wire EDM machine. Once the process proved feasible, grinding and grinding performance of the EDM trued wheel. Diamond wheels are known to exhibit low wheel wear

Shih, Albert J.

468

Development of Designer Diamond Technology for High Pressure High Temperature Experiments in Support of Stockpile Stewardship Program  

SciTech Connect (OSTI)

The role of nitrogen in the fabrication of designer diamond was systematically investigated by adding controlled amount of nitrogen in hydrogen/methane/oxygen plasma. This has led to a successful recipe for reproducible fabrication of designer diamond anvils for high-pressure high-temperature research in support of stockpile stewardship program. In the three-year support period, several designer diamonds fabricated with this new growth chemistry were utilized in high-pressure experiments at UAB and Lawrence Livermore National Laboratory. The designer diamond anvils were utilized in high-pressure studies on heavy rare earth metals, high pressure melting studies on metals, and electrical resistance measurements on iron-based layered superconductors under high pressures. The growth chemistry developed under NNSA support can be adapted for commercial production of designer diamonds.

Vohra, Yogesh, K.

2009-10-28T23:59:59.000Z

469

Effects of diamond nanoparticle exposure on the internal structure and reproduction of Daphnia magna  

Science Journals Connector (OSTI)

Nanomaterials have significant technological advantages but their release into the environment also carry potential ecotoxicological risks. Carbon-based nanoparticles and particularly diamond nanoparticles have numerous industrial and medical applications. The aim of the present study was to evaluate the toxic effects of diamond nanoparticles with an average particle size of 20 nm on the survival, reproduction and tissue structure of the freshwater crustacean Daphnia magna. The chronic toxicity test results showed 100% mortality at concentrations higher than 12.5 mg l?1 and that reproduction inhibition occurred in concentrations higher than 1.3 mg l?1. Light microscopy showed that diamond nanoparticles adhere to the exoskeleton surface and accumulate within the gastrointestinal tract, suggesting that food absorption by the gut cells may be blocked. The results support the use of chronic approaches in environmental protection as part of an integrated environmental monitoring and assessment strategy.

Elsa Mendonça; Mário Diniz; Luís Silva; Isabel Peres; Luísa Castro; José Brito Correia; Ana Picado

2011-01-01T23:59:59.000Z

470

Metal/Diamond Composite Thin-Film Electrodes: New Carbon Supported Catalytic Electrodes  

SciTech Connect (OSTI)

The DOE-funded research conducted by the Swain group was focused on (i) understanding structure-function relationships at boron-doped diamond thin-film electrodes, (ii) understanding metal phase formation on diamond thin films and developing electrochemical approaches for producing highly dispersed electrocatalyst particles (e.g., Pt) of small nominal particle size, (iii) studying the electrochemical activity of the electrocatalytic electrodes for hydrogen oxidation and oxygen reduction and (iv) conducting the initial synthesis of high surface area diamond powders and evaluating their electrical and electrochemical properties when mixed with a Teflon binder. (Note: All potentials are reported versus Ag/AgCl (sat'd KCl) and cm{sup 2} refers to the electrode geometric area, unless otherwise stated).

Greg M. Swain, PI

2009-03-10T23:59:59.000Z

471

Efficient readout of a single spin state in diamond via spin-to-charge conversion  

E-Print Network [OSTI]

Efficient readout of individual electronic spins associated with atom-like impurities in the solid state is essential for applications in quantum information processing and quantum metrology. We demonstrate a new method for efficient spin readout of nitrogen-vacancy (NV) centers in diamond. The method is based on conversion of the electronic spin state of the NV to a charge state distribution, followed by single-shot readout of the charge state. Conversion is achieved through a spin-dependent photoionization process in diamond at room temperature. Using NVs in nanofabricated diamond beams, we demonstrate that the resulting spin readout noise is within a factor of three of the spin projection noise level. Applications of this technique for nanoscale magnetic sensing are discussed.

B. J. Shields; Q. P. Unterreithmeier; N. P. de Leon; H. Park; M. D. Lukin

2014-10-01T23:59:59.000Z

472

Nano-fabricated solid immersion lenses registered to single emitters in diamond  

E-Print Network [OSTI]

We describe a technique for fabricating micro- and nano-structures incorporating fluorescent defects in diamond with a positional accuracy in the hundreds of nanometers. Using confocal fluorescence microscopy and focused ion beam (FIB) etching we first locate a suitable defect with respect to registration marks on the diamond surface and then etch a structure using these coordinates. We demonstrate the technique here by etching an 8 micron diameter hemisphere positioned such that a single negatively charged nitrogen-vacancy defect lies at its origin. This type of structure increases the photon collection efficiency by removing refraction and aberration losses at the diamond-air interface. We make a direct comparison of the fluorescence photon count rate before and after fabrication and observe an 8-fold increase due to the presence of the hemisphere.

L. Marseglia; J. P. Hadden; A. C. Stanley-Clarke; J. P. Harrison; B. Patton; Y. -L. D. Ho; B. Naydenov; F. Jelezko; J. Meijer; P. R. Dolan; J. M. Smith; J. G. Rarity; J. L. O'Brien

2011-02-22T23:59:59.000Z

473

Development of Single Crystal Chemical Vapor Deposition Diamonds for Detector Applications  

SciTech Connect (OSTI)

Diamond was studied as a possible radiation hard technology for use in future high radiation environments. With the commissioning of the LHC expected in 2010, and the LHC upgrades expected in 2015, all LHC experiments are planning for detector upgrades which require radiation hard technologies. Chemical Vapor Deposition (CVD) diamond has now been used extensively in beam conditions monitors as the innermost detectors in the highest radiation areas of BaBar, Belle and CDF and is installed and operational in all LHC experiments. As a result, this material is now being discussed as an alternative sensor material for tracking very close to the interaction region of the super-LHC where the most extreme radiation conditions will exist. Our work addressed the further development of the new material, single-crystal Chemical Vapor Deposition diamond, towards reliable industrial production of large pieces and new geometries needed for detector applications.

Rainer Wallny

2012-10-15T23:59:59.000Z

474

Development of Single Crystal Chemical Vapor Deposition Diamonds for Detector Applications  

SciTech Connect (OSTI)

Diamond was studied as a possible radiation hard technology for use in future high radiation environments. With the commissioning of the LHC expected in 2009, and the LHC upgrades expected in 2013, all LHC experiments are planning for detector upgrades which require radiation hard technologies. Chemical Vapor Deposition (CVD) diamond has now been used extensively in beam conditions monitors as the innermost detectors in the highest radiation areas of BaBar, Belle and CDF and is installed in all LHC experiments. As a result, this material is now being discussed as an alternative sensor material for tracking very close to the interaction region of the super-LHC where the most extreme radiation conditions will exist. Our work addressed the further development of the new material, single-crystal Chemical Vapor Deposition diamond, towards reliable industrial production of large pieces and new geometries needed for detector applications.

Harris Kagan; K.K. Gan; Richard Kass

2009-03-31T23:59:59.000Z

475

Successful data recovery from oscillation photographs containing strong polycrystalline diffraction rings from an unknown small-molecule contaminant: preliminary structure solution of Salmonella typhimurium pyridoxal kinase (PdxK)  

Science Journals Connector (OSTI)

Pyridoxal kinase (PdxK) from S. typhimurium was cloned, purified and crystallized. Successful structure solution was accomplished in spite of strong polycrystalline noise in the oscillation images.

Deka, G.

2014-03-25T23:59:59.000Z

476

Photo-stimulated low electron temperature high current diamond film field emission cathode  

DOE Patents [OSTI]

An electron source includes a back contact surface having a means for attaching a power source to the back contact surface. The electron source also includes a layer comprising platinum in direct contact with the back contact surface, a composite layer of single-walled carbon nanotubes embedded in platinum in direct contact with the layer comprising platinum. The electron source also includes a nanocrystalline diamond layer in direct contact with the composite layer. The nanocrystalline diamond layer is doped with boron. A portion of the back contact surface is removed to reveal the underlying platinum. The electron source is contained in an evacuable container.

Shurter; Roger Philips (Los Alamos, NM), Devlin; David James (Santa Fe, NM), Moody; Nathan Andrew (Los Alamos, NM), Taccetti; Jose Martin (Santa Fe, NM), Russell; Steven John (Los Alamos, NM)

2012-07-24T23:59:59.000Z

477

4e-condensation in a fully frustrated Josephson junction diamond chain  

SciTech Connect (OSTI)

Fully frustrated one-dimensional diamond Josephson chains have been shown [B. Doucot and J. Vidal, Phys. Rev. Lett. 88, 227005 (2002)] to possess a remarkable property: The superfluid phase occurs through the condensation of pairs of Cooper pairs. By means of Monte Carlo simulations we analyze quantitatively the insulator to 4e-superfluid transition. We determine the location of the critical point and discuss the behavior of the phase-phase correlators. For comparison, we also present the case of a diamond chain at zero and 1/3 frustration where the standard 2e-condensation is observed.

Rizzi, Matteo [NEST CNR-INFM and Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa (Italy); Cataudella, Vittorio [COHERENTIA CNR-INFM and Dipartimento di Fisica, Universit Federico II, 80126 Napoli (Italy); Fazio, Rosario [NEST CNR-INFM and Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa (Italy); International School for Advanced Studies (SISSA), via Beirut 2-4, I-34014, Trieste (Italy)

2006-03-01T23:59:59.000Z

478

Synthesis of new Diamond-like B-C Phases under High Pressure and Temperatures  

SciTech Connect (OSTI)

A cubic BC3 (c-BC3) phase was synthesized by direct transformation from graphitic phases at a pressure of 39 GPa and temperature of 2200 K in a laser-heated diamond anvil cell (DAC). A combination of x-ray diffraction (XRD), electron diffraction (ED), transmission electron microscopy (TEM) imaging, and electron energy loss spectroscopy (EELS) measurements lead us to conclude that the obtained phase is hetero-nano-diamond, c-BC3. The EELS measurements show that the atoms inside the cubic structure are bonded by sp3 bonds.

Ming, L. C. [University of Hawaii] [University of Hawaii; Zinin, P. V. [University of Hawaii] [University of Hawaii; Sharma, S. K. [University of Hawaii] [University of Hawaii

2014-04-22T23:59:59.000Z

479

Field emission from bias-grown diamond thin films in a microwave plasma  

DOE Patents [OSTI]

A method of producing diamond or diamond like films in which a negative bias is established on a substrate with an electrically conductive surface in a microwave plasma chemical vapor deposition system. The atmosphere that is subjected to microwave energy includes a source of carbon, nitrogen and hydrogen. The negative bias is maintained on the substrate through both the nucleation and growth phase of the film until the film is continuous. Biases between -100V and -200 are preferred. Carbon sources may be one or more of CH.sub.4, C.sub.2 H.sub.2 other hydrocarbons and fullerenes.

Gruen, Dieter M. (Downers Grove, IL); Krauss, Alan R. (Naperville, IL); Ding, Ming Q. (Beijing, CN); Auciello, Orlando (Bolinbrook, IL)

2002-01-01T23:59:59.000Z

480

Design of flexible ultrahigh-Q microcavities in diamond-based photonic crystal slabs  

E-Print Network [OSTI]

We design extremely flexible ultrahigh-Q diamond-based double-heterostructure photonic crystal slab cavities by modifying the refractive index of the diamond. The refractive index changes needed for ultrahigh-Q cavities with $Q ~ 10^7$, are well within what can be achieved ($\\Delta n \\sim 0.02$). The cavity modes have relatively small volumes $Vdesign is flexible because the range of parameters, cavity length and the index changes, that enables an ultrahigh-Q is quite broad. Furthermore as the index modification is post-processed, an efficient technique to generate cavities around defect centres is achievable, improving prospects for defect-tolerant quantum architectures.

Snjezana Tomljenovic-Hanic; Andrew D. Greentree; C. Martijn de Sterke; Steven Prawer

2008-12-10T23:59:59.000Z

Note: This page contains sample records for the topic "lubricated polycrystalline diamond" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


481

Isotope engineering of silicon and diamond for quantum computing and sensing applications  

E-Print Network [OSTI]

Some of the stable isotopes of silicon and carbon have zero nuclear spin, whereas many of the other elements that constitute semiconductors consist entirely of stable isotopes that have nuclear spins. Silicon and diamond crystals composed of nuclear-spin-free stable isotopes (Si-28, Si-30, or C-12) are considered to be ideal host matrixes to place spin quantum bits (qubits) for quntum computing and sensing applications because their coherent properties are not disrupted thanks to the absence of host nuclear spins. The present article describes the state-of-the-art and future perspective of silicon and diamond isotope engineering for development of quantum information processing devices.

Kohei M. Itoh; Hideyuki Watanabe

2014-10-15T23:59:59.000Z

482

Ambient condition laser writing of graphene structures on polycrystalline SiC thin film deposited on Si wafer  

SciTech Connect (OSTI)

We report laser induced local conversion of polycrystalline SiC thin-films grown on Si wafers into multi-layer graphene, a process compatible with the Si based microelectronic technologies. The conversion can be achieved using a 532 nm CW laser with as little as 10 mW power, yielding {approx}1 {mu}m graphene discs without any mask. The conversion conditions are found to vary with the crystallinity of the film. More interestingly, the internal structure of the graphene disc, probed by Raman imaging, can be tuned with varying the film and illumination parameters, resembling either the fundamental or doughnut mode of a laser beam.

Yue, Naili; Zhang, Yong; Tsu, Raphael [Department of Electrical and Computer Engineering and The Center for Optoelectronics and Optical Communications, The University of North Carolina at Charlotte, Charlotte, North Carolina 28223 (United States)] [Department of Electrical and Computer Engineering and The Center for Optoelectronics and Optical Communications, The University of North Carolina at Charlotte, Charlotte, North Carolina 28223 (United States)

2013-02-18T23:59:59.000Z

483

Effect of titania surface species on the chemisorption of CO and H/sub 2/ on polycrystalline nickel  

SciTech Connect (OSTI)

A submonolayer amount of titanium was deposited and subsequently oxidized in situ on a clean polycrystalline nickel foil in ultrahigh vacuum. Temperature-programmed desorption revealed the activation energy for CO desorption was reduced significantly by the presence of titania surface species. The titania-containing Ni surface showed three binding states for dissociative hydrogen adsorption. Adsorption into the strongest of these three states was an activated process. These results suggest the apparent suppression of CO and H/sub 2/ adsorption typically observed at 300 K for titania-supported group 8 metals may be due to the existence of titania species on the surfaces of the metal particles.

Raupp, G.B.; Dumesic, J.A.

1984-02-16T23:59:59.000Z

484

Effect of Surface Roughening of Substrate Steel on the Improvement of Delamination Strength and Tribological Behavior of Hydrogenated Amorphous Carbon Coating Under Lubricated Conditions  

Science Journals Connector (OSTI)

The adhesion strength of diamond-like carbon (DLC) coatings is an obstacle in efforts to improve the reliability of coated products. It is generally believed that the roughening of the substrate surface improves ...

Masabumi Masuko; Takuya Kudo; Akihito Suzuki

2013-08-01T23:59:59.000Z

485

Thermal conductance of metal-diamond interfaces at high pressure Gregory T. Hohensee  

E-Print Network [OSTI]

are concerned with the exchange of thermal energy across an interface between two materials. This topic-nonmetal interface, a two-temperature model predicts a thermal resistance of Rep = 1/ gL in series with the phononThermal conductance of metal-diamond interfaces at high pressure Gregory T. Hohensee Department

Cahill, David G.

486

Microcrystalline diamond micromechanical resonators with quality factor limited by thermoelastic damping  

E-Print Network [OSTI]

material. For this reason, materials that have low thermal expansion coefficient and high thermal having the highest thermal conductivity (j ¼ 2200 W m�1 K�1 ) of any material at room temperature, a very measurements show thermal conductivity of 110 W m�1 K�1 for heat transport through the thickness of the diamond

Lin, Liwei

487

The Ising model for the bcc, fcc and diamond lattices; a P. H. Lundow,1,  

E-Print Network [OSTI]

The Ising model for the bcc, fcc and diamond lattices; a comparison P. H. Lundow,1, K. Markstr scale Monte Carlo simulation study of the Ising model for the simple cubic lattice was recently The Ising model was formulated as a model for a uniaxial magnetic system and has become one of the most

Markström, Klas

488

Charge Transfer Equilibria Between Diamond and an Aqueous Oxygen Electrochemical Redox Couple  

Science Journals Connector (OSTI)

...exposed to humid atmospheres are common (16...high–surface area diamond powder to small...acidity is generated by atmospheric CO 2 . In this case, the...45-GHz microwave plasma reactor supporting...coupled 13.56-MHz plasma reactor at...electrons leads to large changes...

Vidhya Chakrapani; John C. Angus; Alfred B. Anderson; Scott D. Wolter; Brian R. Stoner; Gamini U. Sumanasekera

2007-11-30T23:59:59.000Z

489

Growth zoning and strain patterns inside diamond crystals as revealed by Raman maps  

Science Journals Connector (OSTI)

...graphite inclusions and their surrounding diamond, including synchroton micro-analysis, is currently in process. The formation...Journal of Superhard Materials, 24, 44-52. Liu, Z., Wang, L., Zhao, Y., Cui, Q., and Zou, G. (1990) High-pressure...

Lutz Nasdala; Wolfgang Hofmeister; Jeffrey W. Harris; Jürgen Glinnemann

490

Porous Boron-Doped Diamond/Carbon Nanotube Electrodes H. Zanin,*,  

E-Print Network [OSTI]

with BDD (large potential window, chemical inertness, low background levels), but also they have application in electronics and sensors, such B-doped diamond (BDD) films are increasingly being used and a very low background current, in addition to chemical and physical stability.7 Planar BDD electrodes

Bristol, University of

491

CVD Diamond Detectors for Current Mode Neutron Time-of-Flight Spectroscopy at OMEGA/NIF  

SciTech Connect (OSTI)

We have performed pulsed neutron and pulsed laser tests of a CVD diamond detector manufactured from DIAFILM, a commercial grade of CVD diamond. The laser tests were performed at the short pulse UV laser at Bechtel Nevada in Livermore, CA. The pulsed neutrons were provided by DT capsule implosions at the OMEGA laser fusion facility in Rochester, NY. From these tests, we have determined the impulse response to be 250 ps fwhm for an applied E-field of 500 V/mm. Additionally, we have determined the sensitivity to be 2.4 mA/W at 500 V/mm and 4.0 mA/W at 1000 V/mm. These values are approximately 2 to 5x times higher than those reported for natural Type IIa diamond at similar E-field and thickness (1mm). These characteristics allow us to conceive of a neutron time-of-flight current mode spectrometer based on CVD diamond. Such an instrument would sit inside the laser fusion target chamber close to target chamber center (TCC), and would record neutron spectra fast enough such that backscattered neutrons and x-rays from the target chamber wall would not be a concern. The acquired neutron spectra could then be used to extract DD fuel areal density from the downscattered secondary to secondary ratio.

G. J. Schmid; V. Yu. Glebov; A. V. Friensehner; D. R. Hargrove; S. P. Hatchett; N. Izumi; R. A. Lerche; T. W. Phillips; T. C. Sangster; C. Silbernagel; C. Stoecki

2001-07-01T23:59:59.000Z

492

Coherent interference effects in a nano-assembled diamond NV center  

E-Print Network [OSTI]

-Packard Laboratories, 1501 Page Mill Rd, Palo Alto, CA 94304, USA Presently with Hewlett-Packard Laboratories, 1501 Page Mill Rd, Palo Alto, CA 94304, USA paul.barclay@hp.com Abstract: Diamond nanocrystals containing NV, P. Olivero, A. D. Greentree, S. Prawer, F. Jelezko, and P. Hemmer, "Coherent Population Trapping

Painter, Oskar

493

Poly(phenylcarbyne): A Polymer Precursor to Diamond-Like Carbon  

Science Journals Connector (OSTI)

...diamond-like carbon by the atmospheric pressure decomposition...therefore favored even at atmospheric pres-sure. High molecular...14. In an inert atmosphere glovebox equipped with...intensity (475 W, 20 kHz, and 0.5-inch tip...for 1:1H NMR (200 MHz, CDCI3): 8 = 7...

Glenn T. Visscher; David C. Nesting; John V. Badding; Patricia A. Bianconi

1993-06-04T23:59:59.000Z

494

High-Sensitivity Temperature Sensing Using an Implanted Single Nitrogen-Vacancy Center Array in Diamond  

E-Print Network [OSTI]

We presented a high-sensitivity temperature detection using an implanted single Nitrogen-Vacancy center array in diamond. The high-order Thermal Carr-Purcell-Meiboom-Gill (TCPMG) method was performed on the implanted single nitrogen vacancy (NV) center in diamond in a static magnetic field. We demonstrated that under small detunings for the two driving microwave frequencies, the oscillation frequency of the induced fluorescence of the NV center equals approximately to the average of the detunings of the two driving fields. On basis of the conclusion, the zero-field splitting D for the NV center and the corresponding temperature could be determined. The experiment showed that the coherence time for the high-order TCPMG was effectively extended, particularly up to 108 {\\mu}s for TCPMG-8, about 14 times of the value 7.7 {\\mu}s for thermal Ramsey method. This coherence time corresponded to a thermal sensitivity of 10.1 mK/Hz1/2. We also detected the temperature distribution on the surface of a diamond chip in three different circumstances by using the implanted NV center array with the TCPMG-3 method. The experiment implies the feasibility for using implanted NV centers in high-quality diamonds to detect temperatures in biology, chemistry, material science and microelectronic system with high-sensitivity and nanoscale resolution.

Junfeng Wang; Fupan Feng; Jian Zhang; Jihong Chen; Zhongcheng Zheng; Liping Guo; Wenlong Zhang; Xuerui Song; Guoping Guo; Lele Fan; Chongwen Zou; Liren Lou; Wei Zhu; Guanzhong Wang

2014-10-25T23:59:59.000Z

495

Studies of n-type doping and surface modification of CVD diamond for use  

E-Print Network [OSTI]

Studies of n-type doping and surface modification of CVD diamond for use in thermionic applications the investigation of potential shallow n-type donors that are candidates to be used as thermionic emitters for converting solar energy to electrical energy. Due to the various problems associated with current n

Bristol, University of

496

Advances in PSII Deposited Diamond-Like Carbon Coatings for Use as a Corrosion Barrier  

E-Print Network [OSTI]

Advances in PSII Deposited Diamond-Like Carbon Coatings for Use as a Corrosion Barrier R. S to improve corrosion resistance, however, the necessary organometallics needed to implant these materials to produce an adherent, hard, wear and, corrosion-resistant coating plays a vital role. These applications

497

Slide diamond burnishing of tool steels with adhesive coatings and diffusion layers  

E-Print Network [OSTI]

Slide diamond burnishing of tool steels with adhesive coatings and diffusion layers W. Brostow*1 with a scratch tester. A combination of both approaches, slide burnishing with hard chrome coating and/or slide in manufacturing tools and structural elements in automotive and aerospace industries. Keywords: Tool steels, Slide

North Texas, University of

498

Automated Testing of HVAC Systems for Commissioning Tim Salsbury and Rick Diamond  

E-Print Network [OSTI]

Automated Testing of HVAC Systems for Commissioning Tim Salsbury and Rick Diamond Lawrence Berkeley of the commissioning of HVAC systems. The approach is based on software that generates a sequence of test signals for new and retrofit projects. Introduction The performance of many HVAC systems is limited more by poor

Diamond, Richard

499

Graphene-on-Diamond Devices with Increased Current-Carrying Capacity: Carbon sp2  

E-Print Network [OSTI]

Graphene-on-Diamond Devices with Increased Current-Carrying Capacity: Carbon sp2 -on-sp3 Technology Laboratory, Illinois 60439, United States *S Supporting Information ABSTRACT: Graphene demonstrated potential for practical applications owing to its excellent electronic and thermal properties. Typical graphene field

500

X-Ray Diamond Anvil Cell Facility at NSLS: 2010 Progress Report  

E-Print Network [OSTI]

X-Ray Diamond Anvil Cell Facility at NSLS: 2010 Progress Report Zhiqiang ChenZhiqiang Chen Stony) Powder X-ray Diffraction, Total Scattering Pair-Distributiony , g Function (PDF) under high P and high, yield strength, amorphization, texturing, compressibility Hydrothermal DAC (Bassett) Angle Dispersive X-ray

Duffy, Thomas S.