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We encourage you to perform a real-time search of NLEBeta
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1

CUSSSFIC4TION CMUXLLq  

Office of Legacy Management (LM)

CUSSSFIC4TION CMUXLLq CUSSSFIC4TION CMUXLLq RITE AUG 1 7 1962 Fcx the Atomic. Energy Commisaion~ Chief. Declaseifle@tlon Brar\qh F-mm A. B. Grsaingsr (Other ends tifmtioel) The die wae foutq3 to workvery satiafactorilywiti thlanew Qpeof incert, andncm,of tbepmvLouedsfeotaofeoo+tH&' iOitYwaslmd. D&e& ._: . . ..YG ~Kl.3. i>ro;rid3 -&I:: clcsuro on bct.k.mds of the .plece m & Die #l, is also to be tried outoo 4zgust22. Barr~l~or~~~Die~~hadalaobeenawlLfiedta' plwidesd~do~- rwrdaM,thatSibs.of~~oouldbe~etoflow~gbtheLliearoundtbe surface of the wend overf'lo~lnto abarrel lvcatedundemeath the die. Under th?3e conditions "b8rre.l type' aaatjngs sere made with hardly any plvmure at all andrefaulthg ooatiiage were,of mums, vergporousand~eot. However, the

2

The SpallaTion  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SpallaTion neuTron Source projecT When the Department of Energy (DOE) set out in the 1990s to develop a neutron scattering research facility that was ten times more powerful than the state of the art, the concept for the project that it chose was as ambitious as the scientific capability it sought to deliver. The Spallation Neutron Source (SNS) Project called for unprecedented collaboration among six national laboratories as well as significant

3

trans Fat and trans Fat Alternatives  

Science Conference Proceedings (OSTI)

trans fat is the common name for unsaturated fat with trans-isomer fatty acid(s). Find out more information about trans fat alternatives as well as analysis of trans fatty acids as well as analytical methods for the determination on trans fat in food. tran

4

UTICA 4, NEW YORK COFIPOR~TION  

Office of Legacy Management (LM)

DROf fORGE & TOOL DROf fORGE & TOOL UTICA 4, NEW YORK COFIPOR~TION PHONE 3- 2331 July 5, 1955 ?:r. E. J. Block Director of Production Division United Staton Atomic ::norgy Commission Yiashington, D. C. Dear Xr. 1310~1~: Xe had a visit last Thursday from Kr. R. C. Sale11 of the: Atomic Energy Commission who inspected our vacuum melting facilities. EIz suggested that we should get in touch with you and that you r+ht be interested in the use of our facilities for the i>roduction of uranium fuel elements. Xe have at the present time the largest coxnercial vacuum installation in the country and m have been producin; high tc~poraturc alloys for the aircraft industry for over txro 'years. ;Is have produced to date Over 400,000 pounds of mtal. Our present rate of production is of the order

5

Trans Fats Alternatives  

Science Conference Proceedings (OSTI)

Trans Fats Alternatives is an indispensable guide for everyone who is interested in trans fats—from food product manufacturers who provide the trans fat solutions to the researchers who would like to create innovative solutions. Trans Fats Alternatives He

6

trans fat Books  

Science Conference Proceedings (OSTI)

AOCS publications dealing with trans fat. trans fat Books trans Fat aocs articles Cd 14-95 Ce 1h-05 dietary fat edible fats food Hydrogenated Soybean Oil methods Non-Hydrogenated Soybean Oil oils saturated fat scientific trans trans fat trans fat

7

HIGH EFFI IEN Y MULTIPLE JUN TION SOLAR ELLS  

multiple-jun tion solar ells te hnology summary te hnology readiness level: 3 ritial funtions and on epts have een proven in a laoratory setting. author:

8

Focus on trans Fat  

Science Conference Proceedings (OSTI)

This comprehensive CD-ROM contains a surplus of information regarding trans fats. Focus on trans Fat Health Nutrition Biochemistry Trans DVD & CD-ROMs Health - Nutrition - Biochemistry Food Science This comprehensive CD-ROM contains a

9

Trans Labeling Package  

Science Conference Proceedings (OSTI)

A special collection of books and CD-ROMS on the topic of trans fat. Trans Labeling Package Health Nutrition Biochemistry Trans Health - Nutrition - Biochemistry Value Packages This Value Package includes: ...

10

si  

Office of Legacy Management (LM)

si si :ri; .-.- ..~ -- The Orrk R&e Ins@@& for Science aud EduWion (ORISE) was established by the U.S. Department of Energy to undertake national aud international programs in science and engineering education, training and management systems, energy and environment systems, and medical sciences. ORISE and its programs are operated by Oak Ridge Associated Universities (ORAU) through a management and operating contract with the U.S. Department of Energy. Established in 1946, ORAU is a consortium of 65 colleges and universities. NOTICES The opinions expresssd herein do not necessarily reflect the opinions of the sponsoring institutions of Oak Ridge Associated Universidss. This report was prepared as an account of work sponsored by the United States Government. Neither the United States

11

Net Trans - TMS  

Science Conference Proceedings (OSTI)

Net Trans ... RESERVE A CLASSIFIED · SUBSCRIPTIONS ... "Italia Online Offers Convenient USENET Access" (Net Trans), J.J. Robinson, March 1998, p. 11.

12

SANDIA COKPOK4TION SANDIA BASE, .QLDUQUERQUE. N. M.  

Office of Legacy Management (LM)

SANDIA COKPOK4TION SANDIA COKPOK4TION SANDIA BASE, .QLDUQUERQUE. N. M. To : DISTRIBUTION Re: Disposition of t h e Shoal S i t e Attached herewith i s a study which has been made s w g e s t i n g p o s s i b l e f u r t h e r uses of t h e Shoal S i t e . I - ! e have a l s o b r i e f l y described how permanent d i s p o s i t i o n might be made. The study has been made with t h e hope t h a t it w i l l evolce f u r t h e r considerc~tion of t h e s i t e and l e a d t o a plan f o r continued use and eventual d i s p o s i t i o n . W i l l you please review t h e study and forward your comments and any o t h e r suggestions f o r t h e s i t e . Your r e p l i e s w i l l be used t o help formulate a f i n a l d i s p o s i t i o n plan. Copy t o : Brig. Cen. D. L. Crowson, D M , \.lash., D. C. Attn: Lt. Col. W . C. H a l l < < J. 3. Reeves, ivkr. I ' A C - W O O R. E. Piiller, P S C - W O O : a ! . W . t

13

EERE PROJECT MANAGEMENT CENTER NEPA DETTIUlIIN .... TION PROJECT  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Chicago Chicago u.s. DEP .... RTIIIENT OF ENERGY EERE PROJECT MANAGEMENT CENTER NEPA DETTIUlIIN .... TION PROJECT TITLE: Chicago Climate Action Plan Advanced Transportation Technologies Initiative STATE: IL Funding Opportunity Announcement Number nla Procurement Instrument Number DE-FG3&-060860S2 NEPA Control Number GFO-G086052-001 Page 1 of2 ClD Number G086052 Based on my review oftbe information concerning the proposed action, as NEPA Compliance Officer (authorized under DOE Order 4S1.1A), I bave made the following determination: ex, EA, EIS APPENDIX AND NUMBER: Description: 65.1 Actions to conserve energy, demonstrate potential energy conservation, and promote energy-efficiency that do not increase the indoor concentrations of potentially harmful substances. These actions may involve financial and technical

14

MetTrans Journal Home  

Science Conference Proceedings (OSTI)

Metallurgical and Materials Transactions Home Page ... MET. TRANS. HOME Journal descriptions and information [MORE]; SUBMIT A PAPER Review author ...

15

maintenance. This research is relevant to opera-tions and maintenance challenges facing aging  

E-Print Network (OSTI)

maintenance. This research is relevant to opera- tions and maintenance challenges facing aging to make equipment last longer.Economic pressures to maintain aging fleets of commercial and military

16

Argonne Transportation - TransForum Intro  

NLE Websites -- All DOE Office Websites (Extended Search)

PSAT Smart Grid Student Competitions Technology Analysis Transportation Research and Analysis Computing Center Working With Argonne Contact TTRDC TransForum Banner TransForum is...

17

We encountered a particularly intriguing imita-tion bird-dropping on the dorsal wing surface  

E-Print Network (OSTI)

to have false images of flies on its wings. It may be our imagination, but don't those red compound eyesWe encountered a particularly intriguing imita- tion bird-dropping on the dorsal wing surface the imitation bird dropping and odor was accom- panied by a most extraordinary wing pattern. To our astonishment

Monteiro, Antónia

18

EFRIGERATION OF FISH -PART 4 PRE PARA TION, FRE EZI NG,  

E-Print Network (OSTI)

.) This leaflet is part four in a series of five on "Refrigeration of Fish." Titles of the other four leaflets are : ~f-Part 1 (Fishery Leaflet 427) Cold-3torage Design and Ref rigera- tion Equipment *Part 2 (Fishery by Joseph W. Slavin, Refrigeration Engineer, Fishery Technological Laboratory, East Boston, Massachusetts

19

China For all ages a MulTi-generaTional exPloraTion  

E-Print Network (OSTI)

China For all ages a MulTi-generaTional exPloraTion The greaT Wall, TerraCoTTa Warriors & The MighCTuresque China Experience the Delights of a Well-Crafted Family Tour Dear Princetonian, Join Princeton Journeys, June 27 ­ July 9, 2013, for a comprehensive tour of China designed with families in mind. Explore

Rowley, Clarence W.

20

trans Fatty Acid Content Laboratory Proficiency Program  

Science Conference Proceedings (OSTI)

Lab Proficiency Testing service for trans fatty acid content. Samples include non-hydrogenated Soybean Oil and hydrogenated Soybean Oil. trans Fatty Acid Content Laboratory Proficiency Program Laboratory Proficiency Program (LPP) aocs applicants certifie

Note: This page contains sample records for the topic "tran si tion" 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

STATEM ENT OF CONSIDER TIONS CLASS WAIVER OF TH E GOVERNMENT'S DOMESTIC AN  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

STATEM STATEM ENT OF CONSIDER TIONS CLASS WAIVER OF TH E GOVERNMENT'S DOMESTIC AN D FO REIGN PATENT RIGHTS AND ALLOCATION OF DATA RIGHTS ARJSING FROM TI-lE:: USE OF DOE FACJLJTIES AND FACIL ITY CONT'l~ACTORS BY OR FOR THIR D PARTY FUND ING SPONSORS UNDER AGREEMENTS FO R COMMERCIALIZING TECHNOLOGY (ACT): DOE WAIVER NO. W(C)-201 l-013 The D..:partrnent of Energ.} (and its predecessor agencies) (col lectively. ''DO E" or · Department") considers each or its DO E Facilities (i.e., Nati onal Laboratories. single-purpose research fac ilities. and other Department facili ties, hereinafter referred to individually as ·'Facil ity" or collect ively as '·Facilities'') to be a unique and valuab le national resource that should be made avail· ble to the extent fea

22

Trans Fats in FoodChapter 8 Labeling of Trans Fatty Acids  

Science Conference Proceedings (OSTI)

Trans Fats in Food Chapter 8 Labeling of Trans Fatty Acids Food Science Health Nutrition eChapters Food Science & Technology Health - Nutrition - Biochemistry Press Downloadable pdf of Chapter 8 Labeli

23

Trans Fats in FoodChapter 1 Trans Fatty Acid Effects on Cardiovascular Disease  

Science Conference Proceedings (OSTI)

Trans Fats in Food Chapter 1 Trans Fatty Acid Effects on Cardiovascular Disease Food Science Health Nutrition Biochemistry eChapters Food Science & Technology Health - Nutrition - Biochemistry AOCS 7D1218959FAE1721B6FEA28

24

Trans Fats in FoodChapter 5 Ruminant Trans Fatty Acids  

Science Conference Proceedings (OSTI)

Trans Fats in Food Chapter 5 Ruminant Trans Fatty Acids Food Science Health Nutrition Biochemistry eChapters Food Science & Technology Health - Nutrition - Biochemistry Press Downloadable pdf of Chapt

25

Trans Fats in FoodChapter 6 Consumption of Trans Fatty Acids  

Science Conference Proceedings (OSTI)

Trans Fats in Food Chapter 6 Consumption of Trans Fatty Acids Food Science Health Nutrition Biochemistry eChapters Food Science & Technology Health - Nutrition - Biochemistry Press Downloadable pdf of

26

Trans Fats in FoodChapter 2 Trans Fats and Cancer  

Science Conference Proceedings (OSTI)

Trans Fats in Food Chapter 2 Trans Fats and Cancer Food Science Health Nutrition Biochemistry eChapters Food Science & Technology Health - Nutrition - Biochemistry Press Downloadable pdf of Chapter 2

27

Trans Tech Green Power | Open Energy Information  

Open Energy Info (EERE)

Tech Green Power" Retrieved from "http:en.openei.orgwindex.php?titleTransTechGreenPower&oldid352369" Categories: Clean Energy Organizations Companies Organizations...

28

TransForum Volume 13 Issue 1  

NLE Websites -- All DOE Office Websites (Extended Search)

glassblower Joe Gregar, the chambers are modeled after cells being used by Professor Peter Bruce's research group at University of St. Andrews, Scotland. TransForum | Volume...

29

TransAtlas | Open Energy Information  

Open Energy Info (EERE)

TransAtlas TransAtlas Jump to: navigation, search Tool Summary Name: TransAtlas Agency/Company /Organization: National Renewable Energy Laboratory Sector: Energy Focus Area: Fuels & Efficiency, Transportation Phase: Determine Baseline, Evaluate Options, Develop Goals, Prepare a Plan, Evaluate Effectiveness and Revise as Needed Topics: Analysis Tools Resource Type: Dataset, Maps User Interface: Website Website: maps.nrel.gov/transatlas Cost: Free OpenEI Keyword(s): Energy Efficiency and Renewable Energy (EERE) Tools References: National Renewable Energy Laboratory Advanced Vehicles and Fuels Research: Data and Resources[1] Logo: TransAtlas TransAtlas is an interactive map with data sets related to transportation and alternative fuels in the United States How to Use This Tool

30

Opportunistic infrastructure : the Trans-Manhattan Expressway  

E-Print Network (OSTI)

Urban Infrastructure: bridges, expressways, and on and off ramps often create barriers and uninhabitable spaces within the urban context. This phenomenon is evident in northern Manhattan where the Trans-Manhattan Expressway ...

O'Koren, Jason F

2010-01-01T23:59:59.000Z

31

TransWest Old | Open Energy Information  

Open Energy Info (EERE)

TransWest Old TransWest Old Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home NEPA Document Collection for: TransWest Old EIS at {{{GeothermalArea}}} for {{{GeothermalDevelopmentPhases}}} {{{NEPA_Name}}} General NEPA Document Info Environmental Analysis Type EIS Applicant Geothermal Area {{{GeothermalArea}}}"{{{GeothermalArea}}}" cannot be used as a page name in this wiki. Project Location Project Phase Techniques Time Frame (days) Participating Agencies Lead Agency none provided Funding Agency none provided Managing District Office none provided Managing Field Office none provided Funding Agencies none provided Surface Manager none provided Mineral Manager none provided Selected Dates Relevant Numbers Lead Agency Doc Number Retrieved from "http://en.openei.org/w/index.php?title=TransWest_Old&oldid=686707"

32

Trans Fats in FoodChapter 7 Zero/Low Trans Margarine  

Science Conference Proceedings (OSTI)

Trans Fats in Food Chapter 7 Zero/Low Trans Margarine Food Science Health Nutrition Biochemistry eChapters Food Science & Technology Health - Nutrition - Biochemistry AOCS BE5E5B1D1ACDDD4CB5DD45065EA26BB5 Press ...

33

Trans Fats in FoodChapter 4 Metabolism of Trans and Cis Fatty Acid  

Science Conference Proceedings (OSTI)

Trans Fats in Food Chapter 4 Metabolism of Trans and Cis Fatty Acid Food Science Health Nutrition Biochemistry eChapters Food Science & Technology Health - Nutrition - Biochemistry AOCS 0C05A4BDE92AAC84620807E63F87BEF4

34

TRAN-STAR EXECUTIVE LIMOUSINE COMPANY  

NLE Websites -- All DOE Office Websites (Extended Search)

TRAN-STAR EXECUTIVE LIMOUSINE COMPANY TRAN-STAR EXECUTIVE LIMOUSINE COMPANY http://www.tranexec.com 20% off published rates for BNL Our reservation center is open 24 hours a day, 365 days a year, so you will always talk to a live agent who has direct contact with our chauffeurs. You can make reservations via phone, website or a simple e-mail to customerservice@tranexec.com once a profile has been established. Our advanced reservation system will track any flight and you can rest assured someone will always be there to meet the arriving passenger, no matter what time the flight arrives. http://www.tranexec.com/TranStarSalesBrochure.pdf These rates are inclusive rates, meaning they include gratuity, taxes....everything. They do not include parking or tolls

35

SensorTran | Open Energy Information  

Open Energy Info (EERE)

SensorTran SensorTran Jump to: navigation, search Name SensorTran Place Austin, Texas Zip 78701 Product Austin, Texas-based designer of fibre optic-based Distributed Temperature Sensing (DTS) systems and solutions for the energy industry, with applications in asset and environmental monitoring. Coordinates 30.267605°, -97.742984° 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":30.267605,"lon":-97.742984,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

36

TransAtlantic Petroleum | Open Energy Information  

Open Energy Info (EERE)

TransAtlantic Petroleum TransAtlantic Petroleum Jump to: navigation, search Logo: TransAtlantic Petroleum Name TransAtlantic Petroleum Address 5910 N. Central Expressway Place Dallas, Texas Zip 75206 Product acquisition, development, exploration, and production of crude oil and natural gas. Stock Symbol TAT Year founded 1985 Phone number 214-220-4323 Website http://www.transatlanticpetrol Coordinates 32.837335°, -96.777462° 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":32.837335,"lon":-96.777462,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

37

TransCom3 Data Set Released, October 2008  

NLE Websites -- All DOE Office Websites (Extended Search)

TransCom3 Data Set Released, October 2008 The ORNL DAAC announces the release of "TransCom3: Annual Mean CO2 Flux Estimates from Atmospheric Inversion (Level 1)", prepared by K.R....

38

trans Fatty acid content of foods in China  

Science Conference Proceedings (OSTI)

Growing evidence that dietary consumption of trans fatty acid (TFA) increases the risk of cardiovascular disease has made TFA a hot topic among people, food industries, and government officials in China. trans Fatty acid content of foods in China

39

Official Methods for Determination of trans Fat, 2nd Edition  

Science Conference Proceedings (OSTI)

This monograph describes the most common gas chromatographic and infrared spectroscopic official methods required for the determination of trans fatty acids for food labeling purposes. Official Methods for Determination of trans Fat, 2nd

40

Vermont Electric Trans Co Inc | Open Energy Information  

Open Energy Info (EERE)

Trans Co Inc Jump to: navigation, search Name Vermont Electric Trans Co Inc Place Vermont Utility Id 19950 Utility Location Yes Ownership T NERC Location NPCC NERC NPCC Yes ISO NE...

Note: This page contains sample records for the topic "tran si tion" 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

trans Fatty Acid Sample Analysis Discussion: A Tutorial Webinar  

Science Conference Proceedings (OSTI)

To ensure laboratories are properly implementing AOCS Official Method Ce 1h-05 when testing for trans fatty acids, AOCS is offering a testing sample kit that includes a webinar tutorial that thoroughly examines this method. trans Fa

42

New England Hydro-Trans Corp | Open Energy Information  

Open Energy Info (EERE)

Trans Corp Jump to: navigation, search Name New England Hydro-Trans Corp Place New Hampshire Utility Id 13356 Utility Location Yes Ownership I NERC Location NPCC NERC NPCC Yes...

43

Infrared absorption of trans-1-chloromethylallyl and trans-1-methylallyl radicals produced in photochemical reactions of trans-1,3-butadiene and C Script-Small-L {sub 2} in solid para-hydrogen  

SciTech Connect

The reactions of chlorine and hydrogen atoms with trans-1,3-butadiene in solid para-hydrogen (p-H{sub 2}) were investigated with infrared (IR) absorption spectra. When a p-H{sub 2} matrix containing C Script-Small-L {sub 2} and trans-1,3-butadiene was irradiated with ultraviolet light at 365 nm, intense lines at 650.3, 809.0, 962.2, 1240.6 cm{sup -1}, and several weaker ones due to the trans-1-chloromethylallyl radical, Bullet (CH{sub 2}CHCH)CH{sub 2}C Script-Small-L , appeared. Observed wavenumbers and relative intensities agree with the anharmonic vibrational wavenumbers and IR intensities predicted with the B3PW91/6-311++g(2d, 2p) method. That the C Script-Small-L atom adds primarily to the terminal carbon atom of trans-1,3-butadiene is in agreement with the path of minimum energy predicted theoretically, but in contrast to the reaction of C Script-Small-L + propene in solid p-H{sub 2}[J. Amicangelo and Y.-P. Lee, J. Phys. Chem. Lett. 1, 2956 (2010)] in which the addition of C Script-Small-L to the central C atom is favored, likely through steric effects in a p-H{sub 2} matrix. A second set of lines, intense at 781.6, 957.9, 1433.6, 2968.8, 3023.5, 3107.3 cm{sup -1}, were observed when the UV-irradiated C Script-Small-L {sub 2}/trans-1,3-butadiene/p-H{sub 2} matrix was further irradiated with IR light from a SiC source. These lines are assigned to the trans-1-methylallyl radical, Bullet (CH{sub 2}CHCH)CH{sub 3}, produced from reaction of 1,3-butadiene with a H atom resulted from the reaction of C Script-Small-L atoms with solid p-H{sub 2} exposed to IR radiation.

Bahou, Mohammed; Wu, Jen-Yu; Tanaka, Keiichi [Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, 1001 Ta-Hsueh Rd., Hsinchu 30010, Taiwan (China); Lee, Yuan-Pern [Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University, 1001 Ta-Hsueh Rd., Hsinchu 30010, Taiwan (China); Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan (China)

2012-08-28T23:59:59.000Z

44

User's Manual for Transit ITS Simulator (TRAN-ITS)  

E-Print Network (OSTI)

AND HIGHWAYS USERS MANUAL FOR TRANSIT ITS SIMULATOR (TRAN-OF CALIFORNIA, BERKELEY User’s Manual for Transit ITS

Dessouky, Maged; Zhang, Lei; Singh, Ajay; Hall, Randolph

1999-01-01T23:59:59.000Z

45

TransForum Volume 9, No. 1 - Spring 2009  

NLE Websites -- All DOE Office Websites (Extended Search)

water, oil-well injec- tion water and process water for five fuel pathways: bioethanol from corn, ethanol from cellulosic feedstocks, gasoline from Canadian oil sands,...

46

Trans Fats in FoodChapter 9 Analysis and Characterization of trans Isomers by Silver-Ion HPLC  

Science Conference Proceedings (OSTI)

Trans Fats in Food Chapter 9 Analysis and Characterization of trans Isomers by Silver-Ion HPLC Food Science Health Nutrition Biochemistry eChapters Food Science & Technology Health - Nutrition - Biochemistry Press ...

47

STATEMENT OF C01 SIDER.!;.TIONS RE Q UE ST BY INVENTOR FOR THE WAIVER OF DOMESTIC AN  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

C01 SIDER.!;.TIONS C01 SIDER.!;.TIONS RE Q UE ST BY INVENTOR FOR THE WAIVER OF DOMESTIC AN D FOREIGN RTGHTS TO AN IDE. TIFIED [NVEN'fl0'\1 ENTiTLED "RESONANT-CAVITY APPA.RATUS FOR CYTOM.GTRY OR PARTICLE ANA L'YS iS'' US P 5,793,485, DEVELOPI·:D UNDER DOE CONTRACT NO. DE-AC04-94AL85000; DOE r:\"VENTfON DISCLOSU RE NO. S-85,819 (SD-5797 ); DOE WAIV ER NO. V.l ( ) 201 l-oo_,; rv3 The Petitioner, Paul L. Gourley (Inventor), has requested a \\'aive of the Government's domestic and fo eign patent rights in a subject invention entitled "Resonant-Cavi ty Apparatus for Cytome ry or Particle Analy·sis." The invention v,·as conceived by the inventor while an employee of the Sandia Corporation (Sandia). ,'andia is the M&O contractor for the Sandia a ional Laboratories (S L), a government-0\vned, contracto

48

Argonne Transportation - TransForum Volume 1  

NLE Websites -- All DOE Office Websites (Extended Search)

TransForum: Volume 1 TransForum: Volume 1 ISSN 2156-3594 (Print) ISSN 2156-373X (Online) Vol. 1, No. 4, Winter 1998-99 (966k pdf ) Energy Secretary Dedicates Argonne's Transportation Center: New Technology Promises Cleaner Diesels Measuring How Fuel Cell Stack Up Vol. 1, No. 3, Summer 1998 (684k pdf ) Using Corn to Fuel Your Car: A Good Environmental Choice? If You Can't Stand the Heat ... Call Argonne Modeling Cars Isn't Just Child's Play Lilliputian Sensors Could Help Solve a Gigantic Pollution Problem Making a Material Difference in Advanced Batteries Vol. 1, No. 2, Spring 1998 (577k pdf ) Gearing Up for HEV Powertrain Design Taking a Closer Look into How Batteries and Fuel Cells Work ITS Makes Life in the Fast Lane Easier "Wrapping It Up to Go": Transporting Hazardous and Radioactive Materials Safely

49

DETE TION MATERIALS  

Sandia National Laboratories has created a new class of scintillators with novel properties enabling use in a wide range of particle detection ...

50

DETE TION MATERIALS  

owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security ... Enhanced detection of special nuclear materials

51

SOLAR REFLE TION PANELS  

Unlike other solar collectors that are known to lose solar reflectivity due to issues with their design, the solar collector

52

DETE TION MATERIALS  

owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security Administration. SAND # 2011-1148P

53

Deseret Generation & Tran Coop (Colorado) | Open Energy Information  

Open Energy Info (EERE)

Coop (Colorado) Jump to: navigation, search Name Deseret Generation & Tran Coop Place Colorado Utility Id 40230 References EIA Form EIA-861 Final Data File for 2010 - File220101...

54

Using HyTrans to Study H2 Transition Scenarios  

NLE Websites -- All DOE Office Websites (Extended Search)

Using HyTrans Using HyTrans to Study H2 Transition Scenarios David Greene & Paul Leiby Oak Ridge National Laboratory Elzbieta Tworek Univ. of Tennessee & StrataG David Bowman Consultant DOE Hydrogen Transition Analysis Workshop January 26, 2006 Washington, DC OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY We will try to cover 4 topics in ½ hour because what we want is your input. 1. What is HyTrans? 2. What can it do? 1. Previous analyses 2. Initial early transition runs 3. What improvements are needed for realistic early transition analysis? 4. How will we interface with NREL's detailed GIS analyses? OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY 1. What is HyTrans? OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY HyTrans is a national (regional) model of the market

55

EA-216-B TransAlta Energy Marketing (U.S) Inc | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

B TransAlta Energy Marketing (U.S) Inc EA-216-B TransAlta Energy Marketing (U.S) Inc Order authorizing TransAlta Energy Marketing (U.S) Inc to export electric energy to Canada....

56

EA-216 TransAlta Energy Marketing (U.S) Inc | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

TransAlta Energy Marketing (U.S) Inc EA-216 TransAlta Energy Marketing (U.S) Inc Order authorizing TransAlta Energy Marketing (U.S) Inc to export electric energy to Canada. EA-216...

57

EA-216-C TransAlta Energy Marketing (U.S.)Inc. | Department of...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

C TransAlta Energy Marketing (U.S.)Inc. EA-216-C TransAlta Energy Marketing (U.S.)Inc. Order authorizing TransAlta Energy Marketing (U.S.) Inc to export electric energy to Canada....

58

Massachusetts Bay Trans Auth | Open Energy Information  

Open Energy Info (EERE)

Auth Auth Jump to: navigation, search Name Massachusetts Bay Trans Auth Place Massachusetts Utility Id 49848 Utility Location Yes Ownership P NERC Location NPCC NERC NPCC Yes Operates Generating Plant Yes Activity Generation Yes Activity Wholesale Marketing Yes Activity Retail Marketing Yes Alt Fuel Vehicle Yes Alt Fuel Vehicle2 Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] 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 Commercial: $0.0896/kWh Transportation: $0.1250/kWh References ↑ "EIA Form EIA-861 Final Data File for 2010 - File1_a" Retrieved from

59

New England Hydro-Tran Elec Co | Open Energy Information  

Open Energy Info (EERE)

England Hydro-Tran Elec Co England Hydro-Tran Elec Co Jump to: navigation, search Name New England Hydro-Tran Elec Co Place Massachusetts Utility Id 13355 Utility Location Yes Ownership I NERC Location NPCC NERC NPCC Yes Activity Transmission Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] 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 No Rates Available References ↑ "EIA Form EIA-861 Final Data File for 2010 - File1_a" Retrieved from "http://en.openei.org/w/index.php?title=New_England_Hydro-Tran_Elec_Co&oldid=411165" Categories: EIA Utility Companies and Aliases

60

Deseret Generation & Tran Coop | Open Energy Information  

Open Energy Info (EERE)

Deseret Generation & Tran Coop Deseret Generation & Tran Coop Jump to: navigation, search Name Deseret Generation & Tran Coop Place Utah Utility Id 40230 Utility Location Yes Ownership C NERC Location WECC NERC WECC Yes Operates Generating Plant Yes Activity Generation Yes Activity Transmission Yes Activity Buying Transmission Yes Activity Wholesale Marketing Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] 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 No Rates Available References ↑ "EIA Form EIA-861 Final Data File for 2010 - File1_a" Retrieved from "http://en.openei.org/w/index.php?title=Deseret_Generation_%26_Tran_Coop&oldid=410580"

Note: This page contains sample records for the topic "tran si tion" 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

TransCanada Power Mktg Ltd | Open Energy Information  

Open Energy Info (EERE)

(Redirected from TransCanada) (Redirected from TransCanada) Jump to: navigation, search Name TransCanada Power Mktg Ltd Place Massachusetts Utility Id 19119 Utility Location Yes Ownership R NERC Location NPCC Activity Wholesale Marketing Yes Activity Retail Marketing Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] 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 Industrial: $0.0954/kWh References ↑ "EIA Form EIA-861 Final Data File for 2010 - File1_a" Retrieved from "http://en.openei.org/w/index.php?title=TransCanada_Power_Mktg_Ltd&oldid=411857" Categories: EIA Utility Companies and Aliases

62

TransForum - Volume 10, No. 2 - Summer 2010  

NLE Websites -- All DOE Office Websites (Extended Search)

TransForum 8 Summer 2010 17 IN THE NEWS In "Obama's Budget May Jump Start Future Electric Cars," scientists hope funding to develop an electric car battery that breathes air, and...

63

Analysis of the rotational structure in the high-resolution infrared spectra of cis,cis- and trans,trans-1,4-difluorobutadiene-1-d1 and trans,trans-1,4-difluorobutadiene-1,4-d2  

SciTech Connect

Samples of cis,cis- and trans,trans-1,4-difluorobutadiene-1- d1 and of trans,trans-1,4-difluorobutadiene-1,4-d2 have been synthesized, and high-resolution (?0.0018 cm-1) infrared spectra of these substances have been recorded in the gas phase. Analysis of the rotational structure, mostly in C-type bands, has yielded ground state rotational constants. For the two 1-d1 species more than one band has been analyzed. For the 1,4-d2 species only one band was available for analysis. However, good agreement between the experimental centrifugal distortion constants and those predicted with a B3LYP/cc-pVTZ model give strong support to the analysis of the very dense spectrum. The ground state rotational constants are a contribution to finding semiexperimental equilibrium structures of the two nonpolar isomers of 1,4- difluorobutadiene.

Craig, Norman C.; Chen, Yihui; Lu, Yuhua; Neese, Christopher F.; Nemchick, Deacon J.; Blake, Thomas A.

2013-06-01T23:59:59.000Z

64

TransForum - Volume 10, No. 3 - Winter 2010  

NLE Websites -- All DOE Office Websites (Extended Search)

aprf.html Auto X Prize website: www.progressiveautoxprize.org Electric cars at smart grid charging stations outside Argonne's APRF 19 TransForum 8 Winter 2010 10 19 RESEARCH...

65

U.S. DEPARThIENT OF ENERGY EERE PROJECT MANAGEMENT CENTER NEP..I. DFTFRlIllN..I.TION  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

NEP..I. DFTFRlIllN..I.TION NEP..I. DFTFRlIllN..I.TION RECIPIENT:State of Nevada Office of Energy PROJECT TITLE: Nevada EECBG City $ubgrant: West Wendover Page 1 of2 STATE: NV Funding Opportunity Announcement Number Procurement Instrument Number NEPA Control Number CID Number DE-FOA.ooooo13 EEOOOO687.001 EEO Bssed on my review of the information conccrning the proposed action, as NEPA Compliance Officu (Iuthorlzed under DOE Order 451.IA), I have made the (ollowing determination: ex, EA, EIS APPENDIX AND NUMBER: Description: 85.1 Actions to conserve energy, demonstrate potential energy conservation, and promote energy-efficiency that do not increase the indoor concentrations of potentially harmful substances. These actions may involve financial and technical assIstance to Individuals (such as builders, owners, consultants, designers), organizations (such as utilities), and state

66

Susan Stryker and Kara Keeling: Considering "Trans-" and "Queer at the Plenary Session of UCLA Queer Studies Conference 2010  

E-Print Network (OSTI)

ac- tivates queer landscapes of identity forma- tion as collaborative processes of mutual becoming and “world

Collette-Vanderaa, Healther

2010-01-01T23:59:59.000Z

67

File:Utah Trans Siting.pdf | Open Energy Information  

Open Energy Info (EERE)

Trans Siting.pdf Trans Siting.pdf Jump to: navigation, search File File history File usage File:Utah Trans Siting.pdf Size of this preview: 463 × 599 pixels. Other resolution: 464 × 600 pixels. Go to page 1 2 Go! next page → next page → Full resolution ‎(1,275 × 1,650 pixels, file size: 21 KB, MIME type: application/pdf, 2 pages) File history Click on a date/time to view the file as it appeared at that time. Date/Time Thumbnail Dimensions User Comment current 15:20, 13 November 2012 Thumbnail for version as of 15:20, 13 November 2012 1,275 × 1,650, 2 pages (21 KB) Dklein2012 (Talk | contribs) You cannot overwrite this file. Edit this file using an external application (See the setup instructions for more information) File usage There are no pages that link to this file.

68

Graphene: A sub-nanometer trans-electrode membrane  

E-Print Network (OSTI)

Isolated, atomically thin conducting membranes of graphite, called graphene, have recently been the subject of intense research with the hope that practical applications in fields ranging from electronics to energy science will emerge. Here, we show that when immersed in ionic solution, a layer of graphene takes on new electrochemical properties that make it a trans-electrode. The trans-electrode's properties are the consequence of the atomic scale proximity of its two opposing liquid-solid interfaces together with graphene's well known in-plane conductivity. We show that several trans-electrode properties are revealed by ionic conductivity measurements on a CVD grown graphene membrane that separates two aqueous ionic solutions. Despite this membrane being only one to two atomic layers thick, we find it is a remarkable ionic insulator with a very small stable conductivity that depends on the ion species in solution. Electrical measurements on graphene membranes in which a single nanopore has been drilled show...

Garaj, S; Reina, A; Kong, J; Branton, D; Golovchenko, J A

2010-01-01T23:59:59.000Z

69

Spark Plasma Sintering of SiC-SiO  

Science Conference Proceedings (OSTI)

Presentation Title, Spark Plasma Sintering of SiC-SiO2 Composites with CVD SiO2 Coated SiC Powder. Author(s), Zhenhua He, Hirokazu Katsui, Rong Tu, ...

70

VTA, SamTrans Look into Future with Bus Demo  

Alternative Fuels and Advanced Vehicles Data Center (EERE)

induction motor for propulsion. induction motor for propulsion. Although there are several fuel cell chemistries and configura- tions, PEM is generally recog- nized as the best combination of electrochemistry, operating temperature, and weight for transportation applications. The fuel cell supplies electric current via an inverter to the propulsion motor, which is a proprietary design. This chassis- mounted, three-phase, induction motor is rated at 225 kW

71

Mexico/Central America; Trans-Mexico gas line studied  

Science Conference Proceedings (OSTI)

This paper reports that current and future pipe line activity in Mexico and Central America is at a low level, with Pemex constructing a small amount of gas transmission and liquids lines. However, plans for a trans-Mexico gas transmission line for imports and exports advance.

Not Available

1991-11-01T23:59:59.000Z

72

EIS-0450: TransWest Express 600 kV Direct Current Transmission...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

50: TransWest Express 600 kV Direct Current Transmission Project in Wyoming, Colorado, Utah, and Nevada EIS-0450: TransWest Express 600 kV Direct Current Transmission Project in...

73

Practical Guide to Vegetable Oil ProcessingChapter 13 Trans Fat Alternatives and Challenges  

Science Conference Proceedings (OSTI)

Practical Guide to Vegetable Oil Processing Chapter 13 Trans Fat Alternatives and Challenges Processing eChapters Processing Press Downloadable pdf of Chapter 13 Trans Fat Alternatives and Challenges from the book

74

Hydrogenation of Fats and Oils: Theory and PracticeChapter 10 Low-Trans Hydrogenation  

Science Conference Proceedings (OSTI)

Hydrogenation of Fats and Oils: Theory and Practice Chapter 10 Low-Trans Hydrogenation Processing eChapters Processing Downloadable pdf of Chapter 10 Low-Trans Hydrogenation from the book ...

75

Valley splitting theory of SiGe/Si/SiGe quantum wells Mark Friesen,1,  

E-Print Network (OSTI)

Valley splitting theory of SiGe/Si/SiGe quantum wells Mark Friesen,1, * Sucismita Chutia,1 Charles an effective mass theory for SiGe/Si/SiGe quantum wells, with an emphasis on calculating the valley splitting. The theory introduces a valley coupling parameter vv which encapsulates the physics of the quantum well

Sheridan, Jennifer

76

DEP.-\RTUENT OF ENERG Y EERE PROJECT MANAG EM ENT CENTER NEP.-I. DETEIU.lIN.-I.TION  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

-\RTUENT OF ENERG Y -\RTUENT OF ENERG Y EERE PROJECT MANAG EM ENT CENTER NEP.-I. DETEIU.lIN.-I.TION Page 1 of2 RECIPIENT:Govemor's Energy Office STATE: CO PROJECf TITLE: COLORADO SEP ARRA - Geothermal Power Direct Use Grant - Town of Rico Funding Opportunity Announcement Number OE-FOA-OOOOO52 Procurement Instrument Number DE-EE0000082 NEPA Control Number GF0..()()()()()82 -009 elD Number o Based on my review of the inCormation concerning the proposed action, as N[PA Compliance Officer (authorized under DOE Order 451.1;\), I have made the following determination: ex, EA, EIS APPENDIX AND NUMBER: Description: A 11 Technical advice and planning assistance to international, national, state, and local organizations. A9 Information gathering (including, but not limited to, literature surveys, inventories, audits), data analysis (including

77

TransCom3 Level 2 Data Set Released  

NLE Websites -- All DOE Office Websites (Extended Search)

Level 2 Data Set Released Level 2 Data Set Released The ORNL DAAC announces the release of "TransCom 3: Seasonal CO2 Flux Estimates from Atmospheric Inversions (Level 2)", prepared by K.R. Gurney and A.S. Denning. This data set provides model outputs and seasonal mean CO2 fluxes from the Atmospheric Carbon Cycle Inversion Intercomparison (TransCom 3), Level 2 inversion experiment. This Level 2 experiment inverted for the spatial and temporal pattern of the residual CO2 sources and sinks. The seasonal inversion consists of a 3-year forward simulation (365 days per year) containing 4 presubtracted tracers, 11 SF6 tracers, and 22 CO2 tracers (11 terrestrial, 11 oceanic) (Gurney et al., 2000). Carbon fluxes were estimated for each month of an average year determined as the mean of the

78

Multiscale Characterization of SiC/SiC Composite Materials  

Science Conference Proceedings (OSTI)

Small scale mechanical testing techniques such as nanoindentation and micro cantilever testing are used to evaluate the properties of the SiC matrix, SiC fiber,

79

Essentials of the SI: Base & derived units  

Science Conference Proceedings (OSTI)

... Table 1. SI base units. SI base unit. Base quantity, Name, Symbol. length, meter, m. ... Table 2. Examples of SI derived units. SI derived unit. ...

80

In-Si (Indium - Silicon)  

Science Conference Proceedings (OSTI)

In-Si crystallographic data...In-Si crystallographic data Phase Composition, wt% In Pearson symbol Space group (Si) ~0 cF 8 Fd m (In) ~100 tI 2 I 4/ mmm...

Note: This page contains sample records for the topic "tran si tion" 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

Anton Tran receives award from the Air War College | National Nuclear  

National Nuclear Security Administration (NNSA)

Anton Tran receives award from the Air War College | National Nuclear Anton Tran receives award from the Air War College | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Anton Tran receives award from the Air ... Anton Tran receives award from the Air War College Posted By Office of Public Affairs Anton Tran Anton Tran, from NNSA's Office of Nuclear Weapon Surety and Quality, has

82

Integrated Analysis of Market Transformation Scenarios with HyTrans  

DOE Green Energy (OSTI)

This report presents alternative visions of the transition of light-duty vehicle transportation in the United States from petroleum to hydrogen power. It is a supporting document to the U.S. Department of Energy's Summary Report, "Analysis of the Transition to a Hydrogen Economy and the Potential Hydrogen Infrastructure Requirements" (U.S. DOE, 2007). Three alternative early transition scenarios were analyzed using a market simulation model called HyTrans. The HyTrans model simultaneously represents the behavior of fuel suppliers, vehicle manufacturers and consumers, explicitly recognizing the importance of fuel availability and the diversity of vehicle choices to consumers, and dependence of fuel supply on the existence of market demand. Competitive market outcomes are simulated by means of non-linear optimization of social surplus through the year 2050. The three scenarios specify different rates and geographical distributions of market penetration for hydrogen fuel cell vehicles from 2012 through 2025. Scenario 1 leads to 2 million vehicles on U.S. roads by 2025, while Scenarios 2 and 3 result in 5 million and 10 million FCVs in use by 2025, respectively. The HyTrans model "costs out" the transition scenarios and alternative policies for achieving them. It then tests whether the scenarios, together with the achievement of the DOE's technology goals for fuel cell vehicles and hydrogen infrastructure technologies could lead to a sustainable transition to hydrogen powered transportation. Given the achievement of DOE's ambitious technology goals, all three scenarios appear to lead to a sustainable transition to hydrogen. In the absence of early transition deployment effort, no transition is likely to begin before 2045. The cumulative costs of the transition scenarios to the government range from $8 billion to $45 billion, depending on the scenario, the policies adopted and the degree of cost-sharing with industry. In the absence of carbon constraining policies, the transition to hydrogen achieves about the same reduction in CO2 emissions as a transition to advanced gasoline-electric hybrid vehicles. With significant carbon policy, drastic reductions in well-to-wheel CO2 emissions are possible. Energy transition modeling is a newly evolving field and much remains to be done to improve the utility of models like HyTrans.

Greene, David L [ORNL; Leiby, Paul Newsome [ORNL; Bowman, David Charles [ORNL

2007-06-01T23:59:59.000Z

83

Met and Mat Trans Contents A: June 1998  

Science Conference Proceedings (OSTI)

... Nb-10Si In Situ Composites [pp. 1749-1757] W.A. Zinsser Jr. and J.J. Lewandowski. Table of Contents, Metallurgical and Materials Transactions B, June 1998 ...

84

Met and Mat Trans Abstracts B: October 1996  

Science Conference Proceedings (OSTI)

The reduction of CaO-SiO2-Al2O3-FeO slags containing less than 10 wt pct FeO by solid carbonaceous materials such as graphite, coke, and coal char was ...

85

Met and Mat Trans Abstracts A: April 1995  

Science Conference Proceedings (OSTI)

Matrix-lattice mismatches of 0.5 to 1 pct at the / ' interface and {100} growth ..... Fourteen SiC particulates from five different suppliers, of green (high purity) and ...

86

Met and Mat Trans Contents B: June 1995  

Science Conference Proceedings (OSTI)

The Effect of an Electric Field on Self-Sustaining Combustion Synthesis: Part II. Field-Assisted Synthesis of beta-SiC [pp. 587-593] A. Feng and Z.A. Munir.

87

TransForum v9n2 - Lithium-ion Battery Research  

NLE Websites -- All DOE Office Websites (Extended Search)

Working With Argonne Contact TTRDC TransForum Vol. 9, No. 2 Argonne's Lithium-ion Battery Research Produces New Materials and Technology Transfer Successes li-ionbattery...

88

TransForum News from Argonne's Transportation Technology R&D...  

NLE Websites -- All DOE Office Websites (Extended Search)

glassblower Joe Gregar, the chambers are modeled after cells being used by Professor Peter Bruce's research group at University of St. Andrews, Scotland. TransForum | Volume...

89

picoTrans: An intelligent icon-driven interface for cross-lingual communication  

Science Conference Proceedings (OSTI)

picoTrans is a prototype system that introduces a novel icon-based paradigm for cross-lingual communication on mobile devices. Our approach marries a machine translation system with the popular picture book. Users interact with picoTrans by pointing ... Keywords: User interface, machine translation, mobile devices

Wei Song; Andrew Finch; Kumiko Tanaka-Ishii; Keiji Yasuda; Eiichiro Sumita

2013-04-01T23:59:59.000Z

90

A pragmatic stochastic decision model for supporting goods trans-shipments in a supply chain environment  

Science Conference Proceedings (OSTI)

This paper develops a set of decision rules to assist wholesalers to decide whether it is more cost effective to trans-ship urgent outstanding retailer orders from other wholesalers, very fast but at a higher purchase cost, or to order from their suppliers. ... Keywords: Inventory replenishment, Lateral trans-shipments, Stochastic demand, Wholesaler operations

H. C. W. Lau; Dilupa Nakandala

2012-12-01T23:59:59.000Z

91

TransForum v9n1 - Omnivorous Engine  

NLE Websites -- All DOE Office Websites (Extended Search)

TransForum Vol. 9, No. 1 This Omnivore Likes a Variety of Fuels, Not Foods Omnivorous engine with Thomas Wallner Argonne research engineer Thomas Wallner adjusts the delay on an ion-sensing circuit used to get real-time combustion feedback. When it comes to fuel, Argonne's omnivorous engine doesn't play favorites. It can take down any blend of gasoline, ethanol, butanol and other types of spark-ignited fuel. Though flexible-fuel vehicles have been around since Ford manufactured its Model T to run on both gasoline and ethanol, the omnivorous engine takes the concept to a whole new level. With this project, researchers are working to fashion an engine that allows spark-ignition vehicles to run more efficiently on ethanol and other next-generation alternative fuels.

92

TransForum Volume 10, No. 1 - Spring 2010  

NLE Websites -- All DOE Office Websites (Extended Search)

1- Spring 2010 1- Spring 2010 RESEARCH REVIEWS 2 Argonne Receives R&D 100 Award for Superhard and Slick Coating 3 Argonne to Explore Lithium-air Battery 4 Argonne's TTRDC Partners with India 5 EcoCAR Participants in Year Two of Competition 6 Charging Ahead: Taking PHEVs Farther on a Single Battery Charge 7 New Molecule Could Help Make Batteries Safer, Less Expensive 8 A Great Debate: Fuel Economy versus Fuel Consumption 10 ARPA-E Awards $6 Million to Two Argonne Projects 11 Green Racing: Fueling Change in the Auto Industry 12 Six Myths about Plug-in Hybrid Electric Vehicles 14 IN THE NEWS 15 FASTRAX 16 PUTTING ARGONNE'S RESOURCES TO WORK FOR YOU Charging Ahead with Ultracapacitors page 6 2 TransForum 8 Spring 2010

93

Fatty Acids in Health Promotion and Disease CausationChapter 11 Trans Fatty Acids and Cardiometabolic Syndrome  

Science Conference Proceedings (OSTI)

Fatty Acids in Health Promotion and Disease Causation Chapter 11 Trans Fatty Acids and Cardiometabolic Syndrome Health Nutrition Biochemistry Trans eChapters Health - Nutrition - Biochemistry Press Downloadable pdf ...

94

Trans-Atlantic Workshop on Rare Earth Elements and Other Critical Materials for a Clean Energy Future  

Energy.gov (U.S. Department of Energy (DOE))

Trans-Atlantic Workshop on Rare Earth Elements and Other Critical Materials for a Clean Energy Future

95

Met and Mat Trans Abstracts A: AUGUST 1995  

Science Conference Proceedings (OSTI)

Age-hardened extruded profiles of an AlMgSi alloy, having different coarseness in the ... A new experimental study of As and Ms in the Fe-Mn system has been ... viz., dilatometry and electrical resistivity measurements, which are applied to the .... as was the large-crack growth behavior, both at constant load ratio (R) and at ...

96

Electronic and Molecular Structures of trans-Dioxotechnetium(V) Polypyridyl Complexes in the Solid State  

Science Conference Proceedings (OSTI)

The structures of novel Tc(V) complexes trans-[TcO2(py)4]Cl.2H2O (1a), trans-[TcO2(pic)4]Cl.2H2O (2a) and trans-[TcO2(pic)4]BPh4 (2b) were determined by X-ray crystallography, and their spectroscopic characteristics were investigated by emission spectroscopy and atomic scale calculations. The cations adopt a tetragonally distorted octahedral geometry, with a trans orientation of the apical oxo groups. trans-[TcO2(pic)4]BPh4 has an inversion center located on technetium; however, for trans-[TcO2(py)4]Cl.2H2O and trans-[TcO2(pic)4]Cl.2H2O, a strong H-bond formed by only one of the oxo substituents introduces an asymmetry in the structure, resulting in inequivalent trans Tc-N and Tc=O distances. Upon 415 nm excitation at room temperature, the complexes exhibited broad, structureless luminescences with emission maxima at approximately 710 nm (1a) and 750 nm (2a, 2b). Like the Re(V) analogs, the Tc(V) complexes luminesce from a 3Eg excited state. Upon cooling the samples from 278 K to 8 K, distinct vibronic features appear in the spectra of the complexes along with increases in emission intensities. The low temperature emission spectra display the characteristic progressions of the symmetric O=Tc=O and the Tc-L-stretching modes. Spectra calculated using a time-dependent theoretical approach are in good agreement with the experimental spectra. The discovery of luminescence from the trans-dioxotechnetium(V) complexes provides the first opportunity to directly compare fundamental luminescence properties of second- and third-row d2 metal-oxo congeners.

Chatterjee, Sayandev; Del Negro, Andrew S.; Wang, Zheming; Edwards, Matthew K.; Skomurski, Frances N.; Hightower, Sean E.; Krause, Jeanette A.; Twamley, Brendan; Sullivan, Brian P.; Reber, Christian; Heineman, William R.; Seliskar, Carl J.; Bryan, Samuel A.

2011-06-20T23:59:59.000Z

97

SI Group Scheduling Page  

NLE Websites -- All DOE Office Websites (Extended Search)

Personnel On-Call Page Beamline Validation Schedule Group Organizational Chart Reviews Presentations Group Scheduling Page Project Scheduling Information Ops Scheduling Info Project / Scheduling Info APS fy2005 Annual Schedule ( html ) PSS Validation Schedule APS fy2006 Annual Schedule (html) PSS Validation Teams Latest Machine Studies Schedule (pdf) (html) New Builds Schedule (For SI GROUP Reference Only) Parasitic Beam Operations Schedule Ops Scheduling Page Shutdown Information Work Schedules August/September Shutdown Shutdown Work List Validation Schedule Safety Info Work Request Links ISM Core Functions Enter / Search Work Requests APS Safety Page Modify / Approve Work Requests Radiation Safety Policy APS TMS Training Profiles MSDS Search This page maintained by Joe Budz

98

EIS-0450: TransWest Express 600 kV Direct Current Transmission Project in  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

0: TransWest Express 600 kV Direct Current Transmission 0: TransWest Express 600 kV Direct Current Transmission Project in Wyoming, Colorado, Utah, and Nevada EIS-0450: TransWest Express 600 kV Direct Current Transmission Project in Wyoming, Colorado, Utah, and Nevada Summary This EIS, being prepared jointly by DOE's Western Area Power Administration and the Department of the Interior's Bureau of Land Management (Wyoming State Office), evaluates the environmental impacts of granting a right-of-way for the TransWest Express 600-kilovolt Direct Current Transmission Project and amending a land use plan. The project consists of an overhead transmission line that would extend approximately 725 miles from south-central Wyoming, through Colorado and Utah. Western proposes to be a joint owner of the project. Public Comment Opportunities

99

TransCanada Power Mktg Ltd (New York) | Open Energy Information  

Open Energy Info (EERE)

Mktg Ltd (New York) Jump to: navigation, search Name TransCanada Power Mktg Ltd Place New York Utility Id 19119 References EIA Form EIA-861 Final Data File for 2010 -...

100

Model Year 2012-2013 SmartWay Vans Year Model Displ Cyl Trans  

NLE Websites -- All DOE Office Websites (Extended Search)

-2013 SmartWay Vans Year Model Displ Cyl Trans Drive Fuel Sales Area Stnd Stnd Description Underhood ID Veh Class Air Pollution Score City MPG Hwy MPG Cmb MPG Greenhouse Gas Score...

Note: This page contains sample records for the topic "tran si tion" 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

TransForum v8n2 - EnerDel/Argonne Battery  

NLE Websites -- All DOE Office Websites (Extended Search)

Contact TTRDC TransForum Vol. 8, No. 2 R&D 100 Award: EnerDelArgonne High-Power Battery for Hybrid Electric Vehicles The EnerDelArgonne Lithium-Ion Battery Khalil Amine, a...

102

Argonne TTRDC - TransForum v10n1 - Lithium-Air Battery  

NLE Websites -- All DOE Office Websites (Extended Search)

With Argonne Contact TTRDC TransForum Vol. 10, No. 1 Argonne to Explore Lithium-air Battery Li-air batteries hold the promise of increasing the energy density of LI-ion...

103

Regulatory Interactions in ProKaryotes from RegTransBase  

DOE Data Explorer (OSTI)

RegTransBase, a manually curated database of regulatory interactions in prokaryotes, captures the knowledge in published scientific literature using a controlled vocabulary. RegTransBase describes a large number of regulatory interactions reported in many organisms and contains various types of experimental data, in particular: the activation or repression of transcription by an identified direct regulator determining the transcriptional regulatory function of a protein (or RNA) directly binding to DNA or RNA mapping or prediction of binding sites for a regulatory protein characterization of regulatory mutations Currently, the RegTransBase content is derived from about 3000 relevant articles describing over 7000 experiments in relation to 128 microbes. It contains data on the regulation of about 7500 genes and evidence for 6500 interactions with 650 regulators. RegTransBase also contains manually created position weight matrices (PWM) that can be used to identify candidate regulatory sites in over 60 species. (Specialized Interface)

Dubchak, Inna; Gelfand, Mikhail

104

Healthful LipidsChapter 1 Trans Fatty Acids in Foods and Their Labeling Regulations  

Science Conference Proceedings (OSTI)

Healthful Lipids Chapter 1 Trans Fatty Acids in Foods and Their Labeling Regulations Health Nutrition Biochemistry eChapters Health - Nutrition - Biochemistry AOCS 3FA9DEFD05007CFC3383777FB64CED9E Press Downloada

105

Trans Fats in FoodChapter 3 Safety and Efficacy of CLA  

Science Conference Proceedings (OSTI)

Trans Fats in Food Chapter 3 Safety and Efficacy of CLA Food Science Health Nutrition Biochemistry eChapters Food Science & Technology Health - Nutrition - Biochemistry Press Downloadable pdf of Chapt

106

SiTracker @ FNAL ROC  

NLE Websites -- All DOE Office Websites (Extended Search)

SiTracker @ FNAL ROC Tracker Standard Operating Procedures Who's Who Shift ELog TIF Data Analysis DCS Using ROOT Running DQM Data Discovery FNAL ROC Shift Operations Process...

107

Eco TransIT World | Open Energy Information  

Open Energy Info (EERE)

Eco TransIT World Eco TransIT World Jump to: navigation, search Tool Summary LAUNCH TOOL Name: Eco TransIT World Focus Area: Low Carbon Communities Topics: Opportunity Assessment & Screening Website: www.ecotransit.org/index.en.html Equivalent URI: cleanenergysolutions.org/content/eco-transit-world Language: "English,Dutch,French,German,Spanish" is not in the list of possible values (Abkhazian, Achinese, Acoli, Adangme, Adyghe; Adygei, Afar, Afrihili, Afrikaans, Afro-Asiatic languages, Ainu, Akan, Akkadian, Albanian, Aleut, Algonquian languages, Altaic languages, Amharic, Angika, Apache languages, Arabic, Aragonese, Arapaho, Arawak, Armenian, Aromanian; Arumanian; Macedo-Romanian, Artificial languages, Assamese, Asturian; Bable; Leonese; Asturleonese, Athapascan languages, Australian languages, Austronesian languages, Avaric, Avestan, Awadhi, Aymara, Azerbaijani, Balinese, Baltic languages, Baluchi, Bambara, Bamileke languages, Banda languages, Bantu (Other), Basa, Bashkir, Basque, Batak languages, Beja; 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Kyrgyz, Klingon; tlhIngan-Hol, Komi, Kongo, Konkani, Korean, Kosraean, Kpelle, Kru languages, Kuanyama; Kwanyama, Kumyk, Kurdish, Kurukh, Kutenai, Ladino, Lahnda, Lamba, Land Dayak languages, Lao, Latin, Latvian, Lezghian, Limburgan; Limburger; Limburgish, Lingala, Lithuanian, Lojban, Lower Sorbian, Lozi, Luba-Katanga, Luba-Lulua, Luiseno, Lule Sami, Lunda, Luo (Kenya and Tanzania), Lushai, Luxembourgish; Letzeburgesch, Macedonian, Madurese, Magahi, Maithili, Makasar, Malagasy, Malay, Malayalam, Maltese, Manchu, Mandar, Mandingo, Manipuri, Manobo languages, Manx, Maori, Mapudungun; Mapuche, Marathi, Mari, Marshallese, Marwari, Masai, Mayan languages, Mende, Mi'kmaq; Micmac, Minangkabau, Mirandese, Mohawk, Moksha, Mon-Khmer languages, Mongo, Mongolian, Mossi, Multiple languages, Munda languages, N'Ko, Nahuatl languages, Nauru, Navajo; Navaho, Ndebele, North; North Ndebele, Ndebele, South; South Ndebele, Ndonga, Neapolitan, Nepal Bhasa; Newari, Nepali, Nias, Niger-Kordofanian languages, Nilo-Saharan languages, Niuean, North American Indian languages, Northern Frisian, Northern Sami, Norwegian, Nubian languages, Nyamwezi, Nyankole, Nyoro, Nzima, Occitan (post 1500); Provençal, Ojibwa, Oriya, Oromo, Osage, Ossetian; Ossetic, Otomian languages, Pahlavi, Palauan, Pali, Pampanga; Kapampangan, Pangasinan, Panjabi; Punjabi, Papiamento, Papuan languages, Pedi; Sepedi; Northern Sotho, Persian, Philippine languages, Phoenician, Pohnpeian, Polish, Portuguese, Prakrit languages, Pushto; Pashto, Quechua, Rajasthani, Rapanui, Rarotongan; Cook Islands Maori, Romance languages, Romanian; Moldavian; Moldovan, Romansh, Romany, Rundi, Russian, Salishan languages, Samaritan Aramaic, Sami languages, Samoan, Sandawe, Sango, Sanskrit, Santali, Sardinian, Sasak, Scots, Selkup, Semitic languages, Serbian, Serer, Shan, Shona, Sichuan Yi; Nuosu, Sicilian, Sidamo, Sign Languages, Siksika, Sindhi, Sinhala; Sinhalese, Sino-Tibetan languages, Siouan languages, Skolt Sami, Slave (Athapascan), Slavic languages, Slovak, Slovenian, Sogdian, Somali, Songhai languages, Soninke, Sorbian languages, Sotho, Southern, South American Indian (Other), Southern Altai, Southern Sami, Spanish; Castilian, Sranan Tongo, Sukuma, Sumerian, Sundanese, Susu, Swahili, Swati, Swedish, Swiss German; Alemannic; Alsatian, Syriac, Tagalog, Tahitian, Tai languages, Tajik, Tamashek, Tamil, Tatar, Telugu, Tereno, Tetum, Thai, Tibetan, Tigre, Tigrinya, Timne, Tiv, Tlingit, Tok Pisin, Tokelau, Tonga (Nyasa), Tonga (Tonga Islands), Tsimshian, Tsonga, Tswana, Tumbuka, Tupi languages, Turkish, Turkmen, Tuvalu, Tuvinian, Twi, Udmurt, Ugaritic, Uighur; Uyghur, Ukrainian, Umbundu, Uncoded languages, Undetermined, Upper Sorbian, Urdu, Uzbek, Vai, Venda, Vietnamese, Volapük, Votic, Wakashan languages, Walamo, Walloon, Waray, Washo, Welsh, Western Frisian, Wolof, Xhosa, Yakut, Yao, Yapese, Yiddish, Yoruba, Yupik languages, Zande languages, Zapotec, Zaza; Dimili; Dimli; Kirdki; Kirmanjki; Zazaki, Zenaga, Zhuang; Chuang, Zulu, Zuni) for this property.

108

Notch Sensitivity of C/SiC and SiC/SiC Composites - Programmaster ...  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2011. Symposium, Ceramic Matrix Composites. Presentation Title, Notch Sensitivity of C/SiC and ...

109

The effect of neutron irradiation on the mechanical properties of C/SiC composites  

SciTech Connect

The effects of neutron irradiation to 3.5 and 9.5 dpa at 730 C on a 2D plain woven carbon fiber reinforced polymer derived SiC matrix composite are presented. For both fluences, the irradiation caused in-plane contraction and trans-plane expansion. Irradiation also caused substantial reduction in composite flexural strength (54%) and increase in flexural tangent modulus (+85%). The extents of dimensional/ mechanical property changes were greater for the higher fluence irradiated samples. Those changes suggest the instability of the polymer derived SiC matrix following irradiation. The nature of the mechanical property changes suggest increased clamping stress between the fiber and the matrix. The composite property changes are explained in terms of irradiation effects on composite constituents and are compared with carbon fiber reinforced carbon matrix composite as a reference material.

Shih, Chunghao [ORNL; Katoh, Yutai [ORNL; Snead, Lance Lewis [ORNL; Steinbeck, John [ORNL

2013-01-01T23:59:59.000Z

110

Spintronics with Si quantum dots  

Science Conference Proceedings (OSTI)

Electron transport through small Si quantum dot is investigated. The B-dependence of energy levels is dominated by the Zeeman shift, allowing us to measure the spin difference between two successive ground states directly. Combined with the ability ... Keywords: Coulomb blockade, Si nanostructures, quantum dots, spin blockade

Leonid P. Rokhinson; Lingue J. Guo; Steven Y. Chou; Daniel C. Tsui

2002-08-01T23:59:59.000Z

111

High mobility CMOS transistors on Si/SiGe heterostructure channels  

Science Conference Proceedings (OSTI)

We have demonstrated high mobility CMOS transistors on Si/SiGe heterostructure channels selectively grown on a Si (100) substrate. Electron and hole mobility is enhanced simultaneously on a single Si/SiGe heterostructure channel by confining electrons ... Keywords: Hetero-epitaxy, Hetero-structure, High mobility channel, SiGe CMOS

Jungwoo Oh; Kanghoon Jeon; Se-Hoon Lee; Jeff Huang; P. Y. Hung; Injo Ok; Barry Sassman; Dae-Hong Ko; Paul Kirsch; Raj Jammy

2012-09-01T23:59:59.000Z

112

MAGNETOHYDRODYNAMIC AND THERMAL ISSUES OF THE SiCf0SiC FLOW CHANNEL INSERT  

E-Print Network (OSTI)

MAGNETOHYDRODYNAMIC AND THERMAL ISSUES OF THE SiCf0SiC FLOW CHANNEL INSERT S. SMOLENTSEV,* N. B) made of a silicon carbide composite (SiCf /SiC), which serves as electric and thermal insulator conductivity of the SiCf /SiC as pa- rameters. Under the DEMO reactor conditions, param- eters of the FCI have

Abdou, Mohamed

113

Thermophysical and Mechanical Properties of SiC/SiC Composites (5/28/98 draft)  

E-Print Network (OSTI)

Thermophysical and Mechanical Properties of SiC/SiC Composites (5/28/98 draft) S.J. Zinkle and L.L. Snead Oak Ridge National Laboratory The key thermophysical and mechanical properties for SiC/SiC for design calculations wherever possible. The engineering database for SiC/SiC composites is very limited

California at Los Angeles, University of

114

ARTICULATING BODIES IN TAPESTRIES OF SPACE: MAPPING ETHNOGRAPHIES OF TRANS SOCIAL AND POLITICAL COALITIONS IN WASHINGTON, DC.  

E-Print Network (OSTI)

??In this dissertation I explore how transgender, transsexual and other gender non-conforming subjects organize socially and politically as members of immensely diverse and discontinuous `trans… (more)

Edelman, Elijah Adiv

2012-01-01T23:59:59.000Z

115

Characterization of SiO2/Si Interface Quality by ...  

Science Conference Proceedings (OSTI)

... Steam in Furnace at 350oC 2.0 Wafer C Native Oxide 1.4 Wafer D ... Ultra-thin SiO2 films were grown by plasma oxidation and steam ...

2013-03-29T23:59:59.000Z

116

Si Brilliant Technology Ltd | Open Energy Information  

Open Energy Info (EERE)

Si Brilliant Technology Ltd Jump to: navigation, search Name Si-Brilliant Technology Ltd Place Zhejiang Province, China Sector Solar Product Chinese solar-grade polysilicon maker....

117

Microsoft Word - CX-CentraliaTap_Chehalis-Covington_TransAlta_WoodPoles_WEB.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

6, 2011 6, 2011 REPLY TO ATTN OF: KEP-4 SUBJECT: Environmental Clearance Memorandum Chad Caldwell Customer Service Engineer - TPC-Olympia Proposed Action: Replace aging wood poles on Trans Alta's Centralia Tap to Chehalis- Covington No. 1 230-kV transmission line. Budget Information: As per agreement with Trans Alta PP&A Project No.: N/A Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.3 Routine maintenance activities... for...rights-of-way, infrastructures (e.g.. roads)... routine maintenance activities, corrective...are required to maintain and preserve infrastructures...in a condition suitable for the facility to be used for its designated purpose. Location: The project is located on Trans Alta's Centralia Tap to Chehalis-Covington No. 1

118

Trans-Atlantic Workshop on Rare Earth Elements and Other Critical Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Trans-Atlantic Workshop on Rare Earth Elements and Other Critical Trans-Atlantic Workshop on Rare Earth Elements and Other Critical Materials for a Clean Energy Future Trans-Atlantic Workshop on Rare Earth Elements and Other Critical Materials for a Clean Energy Future December 3, 2010 Session A: Setting the Scene - Critical Materials for a Clean Energy Future Diana Bauer, Office of Policy and International Affairs, U.S. Department of Energy, Highlights of the DOE Critical Materials Strategy Antje Wittenberg, Directorate General for Enterprise and Industry, The EU Raw Materials Initiative and the Report of the Ad-hoc Group (tbc) Tom Lograsso, Ames Laboratory (Iowa State University), Future Directions in Rare Earth Research: Critical Materials for 21st Century Industry Derk Bol, Materials Innovation Institute M2i (Netherlands) M2i, Material

119

SiCf/SiC Composites for Advanced Nuclear Applications  

SciTech Connect

Composite materials have the potential for their properties to be tailored to specific applications by engineering the combination of fibers and matrices. Ceramic matrix composites are attractive because of their excellent high-temperature properties and corrosion resistance. In particular, ceramic composites made from silicon carbide fibers and silicon carbide matrices (SiCf/SiC) are promising for nuclear applications because of the radiation resistance of the ??phase of SiC, their excellent high-temperature fracture, creep, corrosion and thermal shock resistance. The ??phase of SiC has been shown by numerous studies to have a saturation swelling value of about 0.1 to 0.2% at 800 to 1000°C. This suggests that composites of SiC/SiC have the potential for excellent radiation stability. The continuous fiber architecture, coupled with engineered interfaces between the fiber and matrix, provide excellent fracture properties and fracture toughness values on the order of 25 MPa m1/2. The strength and fracture toughness are independent of temperature up to the limit of the fiber stability. Also, these fiber/matrix microstructures impart excellent thermal shock and thermal fatigue resistance so start-up and shut-down cycles and coolant loss scenarios should not induce significant structural damage.

Jones, Russell H.

2003-06-16T23:59:59.000Z

120

Report No. K-TRAN: KU-05-1 FINAL REPORT  

E-Print Network (OSTI)

-TRAN A COOPERATIVE TRANSPORTATION RESEARCH PROGRAM BETWEEN: KANSAS DEPARTMENT OF TRANSPORTATION KANSAS STATE of Transportation Bureau of Materials and Research 700 SW Harrison Street Topeka, Kansas 66603-3754 14 Sponsoring countermeasures could be developed and implemented in the near future. The objective was accomplished using a four

Peterson, Blake R.

Note: This page contains sample records for the topic "tran si tion" 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

2004 ASHRAE. 829 This paper presents an overview of the conduction trans-  

E-Print Network (OSTI)

©2004 ASHRAE. 829 ABSTRACT This paper presents an overview of the conduction trans- fer function attention is given to the methods included in the ASHRAE Loads Toolkit. The toolkit contains the source code for ASHRAE's new load calculation methods, the heat balance method (HBM) and the radiant time series method

122

Influence of the geological history of the Trans-Mexican Volcanic Belt  

E-Print Network (OSTI)

-eight populations (210 individuals) were sequenced for one nuclear (rpb2) and two chloroplast (trnL­F and psb time, geology, Mexico, nuclear marker, phylogeography, plant spe- ciation, psbA­trnH, rpb2, Trans-Miocene around the mod- ern-day cities of Morelia and Queretaro in central Mexico, ª 2013 Blackwell Publishing

123

The possible nature of dark energy and dark matter Nathalie Olivi-Tran1,2  

E-Print Network (OSTI)

The possible nature of dark energy and dark matter Nathalie Olivi-Tran1,2 1 Laboratoire Charles of curvature have gravitational effects and deviate radiations. While we question dark energy, as another the nature of time. Keywords: dark matter; dark energy; nature of time 1 hal-00719998,version1-23Jul2012

Paris-Sud XI, Université de

124

Si/SiGe Quantum Devices and Quantum Wells: Electron Spin Coherence  

E-Print Network (OSTI)

Si/SiGe Quantum Devices and Quantum Wells: Electron Spin Coherence J. L. Truitt1 , K. A. Slinker1 quantum wells are clad by SiGe barriers, and therefore intrinsically strained, leading to growth the current status of ESR experiments in Si/SiGe quantum wells. Many factors can effect transport in silicon

Sheridan, Jennifer

125

A Correspondence between Temporal Descrip tion Logics  

E-Print Network (OSTI)

Overview of the ALCF Early Science Program Timothy J. Williams Argonne Leadership Compu2-hours to burn in a few months First in Mira Queue: Early Science Program h3p://esp.alcf science ­ Postdocs were assigned to the projects ­ ALCF staff has held four

Baader, Franz

126

Commercialization potential of compositionally graded Ge - Si??x?Gex? - Si substrates for solar applications  

E-Print Network (OSTI)

This project considers the potential of Ge - Si??x?Gex? - Si substrates for solar applications. The use of compositionally graded substrates to achieve heterointegration across different materials platforms such as Si, Ge ...

Goh, Johnathan Jian Ming

2006-01-01T23:59:59.000Z

127

SiC/SiC Composite Thruster for Upper Stage Liquid Rocket Engines  

Science Conference Proceedings (OSTI)

A SiC/SiC composite thrust chamber was made by the lamination of three axes braiding layers, and the Tyrano ZMI SiC fibers were used as reinforcements and

128

Thermochemical Degradation Mechanisms of SiC/BN/SiC Composites  

Science Conference Proceedings (OSTI)

Presentation Title, Thermochemical Degradation Mechanisms of SiC/BN/SiC ... Modeling Framework and Associated Simulation Tools for the Prediction of ...

129

Synthesis, Structure and Mechanical Properties of AlN-Si3N4-SiC ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Reactive sintered Si3N4-SiC ceramics have been widely used. However, the strength of these composites needs to be further improved.

130

Analyses of interface adhesion between porous SiO2 low-k film and SiC/SiN layers by nanoindentation and nanoscratch tests  

Science Conference Proceedings (OSTI)

In this study, the interface adhesion between porous SiO"2 low-dielectric-constant film and SiN capping layer as well as SiC etch stop layer has been investigated. The SiN capping layer was found mostly composed of Si to N bonds, and the porous SiO"2 ... Keywords: Bonding configuration, Dielectrics, Interface adhesion

Shou-Yi Chang; Yi-Chung Huang

2007-02-01T23:59:59.000Z

131

Integrated Market Modeling of Hydrogen Transition Scenarios with HyTrans  

NLE Websites -- All DOE Office Websites (Extended Search)

Integrated Market Modeling of Integrated Market Modeling of Hydrogen Transition Scenarios with HyTrans Paul N. Leiby, David L. Greene and David Bowman Oak Ridge National Laboratory A presentation to the Hydrogen Delivery Analysis Meeting FreedomCAR and Fuels Partnership Delivery, Storage and Hydrogen Pathways Tech Teams May 8-9, 2007 Columbia, MD 2 OAK RIDGE NATIONAL LABORATORY U. S. DEPARTMENT OF ENERGY Drawing from several other DOE models, HyTrans integrates supply and demand in a dynamic non-linear market model to 2050. * H2A - Hydrogen Production - Hydrogen Delivery * PSAT & ASCM - Fuel economy - 2010/2015 cost & performance goals * ORNL Vehicle Choice Model - Fuel availability - Make & model diversity - Price, fuel economy, etc. * Vehicle Manufacturing Cost Estimates (assisted by OEMs)

132

SiNode Systems | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SiNode Systems SiNode Systems National Clean Energy Business Plan Competition 2013 31 likes SiNode Systems Northwestern University SiNode Systems is a battery materials venture developing silicon-graphene anodes for the next generation of lithium-ion batteries. SiNode anodes offer higher battery capacity and faster charging rates, all while being produced via a low cost solution chemistry-based manufacturing process. SiNode seeks to change the landscape for lithium-ion batteries so they can meet the demands of a wide range of industries, from consumer electronics to electric vehicles. SiNode technology uses a composite of silicon nano-particles and porous graphene, developed by Dr. Harold H. Kung at Northwestern University. SiNode's anodes offer dramatic energy capacity increases (3200 mAh/g vs.

133

SiNode Systems | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SiNode Systems SiNode Systems National Clean Energy Business Plan Competition 2013 31 likes SiNode Systems Northwestern University SiNode Systems is a battery materials venture developing silicon-graphene anodes for the next generation of lithium-ion batteries. SiNode anodes offer higher battery capacity and faster charging rates, all while being produced via a low cost solution chemistry-based manufacturing process. SiNode seeks to change the landscape for lithium-ion batteries so they can meet the demands of a wide range of industries, from consumer electronics to electric vehicles. SiNode technology uses a composite of silicon nano-particles and porous graphene, developed by Dr. Harold H. Kung at Northwestern University. SiNode's anodes offer dramatic energy capacity increases (3200 mAh/g vs.

134

SiNode Systems | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SiNode Systems SiNode Systems National Clean Energy Business Plan Competition 2013 31 likes SiNode Systems Northwestern University SiNode Systems is a battery materials venture developing silicon-graphene anodes for the next generation of lithium-ion batteries. SiNode anodes offer higher battery capacity and faster charging rates, all while being produced via a low cost solution chemistry-based manufacturing process. SiNode seeks to change the landscape for lithium-ion batteries so they can meet the demands of a wide range of industries, from consumer electronics to electric vehicles. SiNode technology uses a composite of silicon nano-particles and porous graphene, developed by Dr. Harold H. Kung at Northwestern University. SiNode's anodes offer dramatic energy capacity increases (3200 mAh/g vs.

135

UBE's SiC-base Ceramic Fibers  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, Materials Science & Technology 2012. Symposium, Ceramic Matrix Composites. Presentation Title, UBE's SiC-base Ceramic ...

136

Intern experience at Tech Tran Corporation, Naperville, Illinois: an internship report  

E-Print Network (OSTI)

This report presents a survey of the author's internship experience with Tech Tran Corporation during the period September 1, 1981 through May 1, 1982. The eight month internship was spent as an associate engineer and associate editor assigned to the engineering branch. The intent of this report is to demonstrate that this experience fulfills the requirements of the Doctor of Engineering internship. The author's internship activities are presented to document the achievement of three major objectives: orientation to professional engineering consulting; development of management and interpersonal skills; and recognizable contributions to the internship firm. These objectives were attained through trips to various organizations, meetings, and conferences involved in manufacturing technology, assignments as an engineering consultant representing Tech Tran, and work preformed on three major Tech Tran contracts. The result of this internship experience was an appreciation for both the technical and non-technical aspects of operating an engineering consulting firm. The conclusion of the report is that the objectives were realized, and the internship requirements for the degree of Doctor of Engineering were satisfied.

Morgan, Joseph Alan, 1947-

1982-07-01T23:59:59.000Z

137

A Simulated Climatology of Asian Dust Aerosol and Its Trans-Pacific Transport. Part I: Mean Climate and Validation  

Science Conference Proceedings (OSTI)

The Northern Aerosol Regional Climate Model (NARCM) was used to construct a 44-yr climatology of spring Asian dust aerosol emission, column loading, deposition, trans-Pacific transport routes, and budgets during 1960–2003. Comparisons with ...

T. L. Zhao; S. L. Gong; X. Y. Zhang; J-P. Blanchet; I. G. McKendry; Z. J. Zhou

2006-01-01T23:59:59.000Z

138

Deep Frying: Chemistry, Nutrition and Practical ApplicationsChapter 10 Physiological Effects of trans and Cyclic Fatty Acids  

Science Conference Proceedings (OSTI)

Deep Frying: Chemistry, Nutrition and Practical Applications Chapter 10 Physiological Effects of trans and Cyclic Fatty Acids Food Science Health Nutrition Biochemistry eChapters Food Science & Technology Health - Nutrition - Biochemi

139

Design of a model pipeline for testing of piezoelectric micro power generator for the Trans-Alaska Pipeline System  

E-Print Network (OSTI)

In order to provide a reliable corrosion detection system for the Trans-Alaska Pipeline System (TAPS), a distributed wireless self-powered sensor array is needed to monitor the entire length of the pipeline at all times. ...

Lah, Mike M. (Mike Myoung)

2007-01-01T23:59:59.000Z

140

Resurrection of the Bombay trans-harbour link project by using Wheaton's monocentric models of urban land use  

E-Print Network (OSTI)

BOMBAY TRANS-HARBOUR LINK PROJECT: A possible solution to Bombay's seemingly unsurmountable social problems. The primary idea behind this thesis is to present a new technique for the appraisal of large scale urban ...

Bhave, Shubhada

1987-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tran si tion" 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

Fatty Acids in Health Promotion and Disease CausationChapter 1 Trans and Other Fatty Acids: Effects on Endothelial Functions  

Science Conference Proceedings (OSTI)

Fatty Acids in Health Promotion and Disease Causation Chapter 1 Trans and Other Fatty Acids: Effects on Endothelial Functions Health Nutrition Biochemistry eChapters Health - Nutrition - Biochemistry Press Downloadable p

142

Optimization study of a trans-Atlantic abort for the U.S. space shuttle using a pseudospectral Legendre method  

E-Print Network (OSTI)

The problem of performance optimization for a trans-Atlantic shuttle abort is considered. At five points during the second stage of ascent, a failure of a main engine occurs, which necessitates an abort from the nominal ...

Taylor, Christine P. (Christine Pia), 1979-

2003-01-01T23:59:59.000Z

143

High Q SiC microresonators  

E-Print Network (OSTI)

We demonstrate photonic devices based on standard 3C SiC epitaxially grown on silicon. We achieve high optical confinement by taking advantage of the high stiffness of SiC and undercutting the underlying silicon substrate. We demonstrate a 20 um radius suspended microring resonator with Q of 18000 fabricated on commercially available SiC-on-silicon substrates.

Cardenas, Jaime; Phare, Christopher T; Shah, Shreyas Y; Poitras, Carl B; Lipson, Michal

2013-01-01T23:59:59.000Z

144

Progress in blanket designs using SiCf/SiC composites L. Giancarli a,  

E-Print Network (OSTI)

manufacturing routes in order to identify specific issues and requirements for the future R&D on Si maintenance schemes. In addition, SiCf/SiC has an excellent chemical stability at high temperature, which fabrication steps for an outboard segment consisting of 6 modules: 1) Manufacturing separate halves of the Si

Raffray, A. René

145

SiC Power Module  

NLE Websites -- All DOE Office Websites (Extended Search)

R&D 100 Entry R&D 100 Entry SiC Power Module 2 R&D 100 Entry SiC Power Module Submitting OrganizatiOn Sandia National Laboratories PO Box 5800, MS 1033 Albuquerque, NM 87185-1033 USA Stanley Atcitty Phone: 505-284-2701 Fax: 505-844-2890 satcitt@sandia.gov AFFIRMATION: I affirm that all information submitted as a part of, or supplemental to, this entry is a fair and accurate representation of this product. _____________________________________ Stanley Atcitty JOint Entry Arkansas Power Electronics International, Inc.; University of Arkansas; Rohm Co., LTD.; and the Department of Energy/ Energy Storage Program. 1. 1. Arkansas Power Electronics International, Inc. 535 W. Research Center Blvd. Fayetteville, AR 72701 USA Alexander B. Lostetter, President & CEO Phone: 479-443-5759

146

SiC/SiC Composite for an Advanced Fusion Power Plant Blanket A. R. Raffray1  

E-Print Network (OSTI)

SiC/SiC Composite for an Advanced Fusion Power Plant Blanket A. R. Raffray1 , L. El-Guebaly2 , D. K of an exploratory study of blanket concepts based on SiC/SiC structure and LiPb breeder. An assessment, and constraints relating to the SiC/SiC properties are discussed. INTRODUCTION The use of SiC/SiC composite

Najmabadi, Farrokh

147

C.D. Tran, J. Near Infrared Spectrosc. 8, 89102 (2000) 89 NIR Publications 2000, ISSN 0967-0335  

E-Print Network (OSTI)

-0335 Visualising chemical composition and reaction kinetics by the near infrared multispectral imaging technique on some of applications of the imaging spectrometer including the kinetic deter- mination of curing;92 Visualising Chemical Composition and Reaction Kinetics tion than the NIR camera. Specifically, the visible CCD

Reid, Scott A.

148

ARR/18th SOFE Presentation, Albuquerque, NM, October 1999 SiC/SiC Composite for an  

E-Print Network (OSTI)

ARR/18th SOFE Presentation, Albuquerque, NM, October 1999 SiC/SiC Composite for an Advanced Fusion, Albuquerque, NM, October 1999 Background · The use of SiC/SiC composite as structural material in a fusion of a SiC/SiC based blanket for high performance blanket design - High temperature operation - Use latest

Raffray, A. René

149

SI PC104 Performance Test Report  

SciTech Connect

The Spectral Instruments (SI) PC104 systems associated with the SI-1000 CCD camera exhibited intermittent power problems during setup, test and operations which called for further evaluation and testing. The SI PC104 System is the interface between the SI-1000 CCD camera and its associated Diagnostic Controller (DC). As such, the SI PC104 must be a reliable, robust system capable of providing consistent performance in various configurations and operating conditions. This SI PC104 system consists of a stackable set of modules designed to meet the PC104+ Industry Standard. The SI PC104 System consists of a CPU module, SI Camera card, Media converter card, Video card and a I/O module. The root cause of power problems was identified as failing solder joints at the LEMO power connector attached to the SI Camera Card. The recommended solution was to provide power to the PC104 system via a PC104+ power supply module configured into the PC104 stack instead of thru the LEMO power connector. Test plans (2) were developed to test SI PC104 performance and identify any outstanding issues noted during extended operations. Test Plan 1 included performance and image acquisition tests. Test Plan 2 verified performance after implementing recommendations. Test Plan 2 also included verifying integrity of system files and driver installation after bootup. Each test plan was implemented to fully test against each set of problems noted. Test Plan presentations and Test Plan results are attached as appendices. Anticipated test results will show successful operation and reliable performance of the SI PC104 system receiving its power via a PC104 power supply module. A SI PC104 Usage Recommendation Memo will be sent out to the SI PC104 User Community. Recommendation memo(s) are attached as appendices.

Montelongo, S

2005-12-16T23:59:59.000Z

150

Lanthanum diffusion in the TiN/LaOx/HfSiO/SiO2/Si stack  

Science Conference Proceedings (OSTI)

Band edge Complementary Metal Oxide Semiconductor (CMOS) devices are obtained by insertion of a thin LaO"x layer between the high-k (HfSiO) and metal gate (TiN). High temperature post deposition anneal induces Lanthanum diffusion across the HfSiO towards ... Keywords: APT, ATR-FTIR, HfSiO, Interfacial dipole, La, Metal/high-k stack, S-XPS, Threshold voltage tuning, TiN, ToF-SIMS

E. Martinez; P. Ronsheim; J. -P. Barnes; N. Rochat; M. Py; M. Hatzistergos; O. Renault; M. Silly; F. Sirotti; F. Bertin; N. Gambacorti

2011-07-01T23:59:59.000Z

151

Geothermal exploration in Trans-Pecos, Texas/New Mexico. Final report  

DOE Green Energy (OSTI)

Interest in alternative energy has encouraged the investigation of possible geothermal resources in Trans Pecos, Texas/New Mexico in an area of extensive Cenozoic volcanism with several hot springs. Geochemical analysis of groundwater samples resulted in the definition of two major areas of geothermal interest: the Hueco Bolson in northeastern El Paso County, and the Presidio Bolson. Regional temperature gradient measurements also supported the existence of anomalies in these places, and showed another smaller anomaly in the Finlay Mountains, Hudspeth County. Detailed geophysical and geochemical studies were conducted on these three targets.

Roy, R.; Taylor, B.; Miklas, M.P. Jr.

1983-09-01T23:59:59.000Z

152

Tensile testing of SiC whiskers  

SciTech Connect

The room temperature tensile mechanical properties of SiC whiskers have been examined using a micro-tensile-test apparatus. SiC whiskers exhibit an average tensile strength of 8.4 GPa for a 5 mm tested length, and an average elastic modulus of 581 GPa. These results indicate that SiC whiskers possess significant potential as short-fiber reinforcement elements in ceramic matrix composites.

Petrovic, J.J.

1984-01-01T23:59:59.000Z

153

SiD Letter of Intent  

SciTech Connect

This document presents the current status of the Silicon Detector (SiD) effort to develop an optimized design for an experiment at the International Linear Collider. It presents detailed discussions of each of SiD's various subsystems, an overview of the full GEANT4 description of SiD, the status of newly developed tracking and calorimeter reconstruction algorithms, studies of subsystem performance based on these tools, results of physics benchmarking analyses, an estimate of the cost of the detector, and an assessment of the detector R and D needed to provide the technical basis for an optimised SiD.

Aihara, H., (Ed.); Burrows, P., (Ed.); Oreglia, M., (Ed.); Berger, E.L.; Guarino, V.; Repond, J.; Weerts, H.; Xia, L.; Zhang, J.; /Argonne, HEP; Zhang, Q.; /Argonne, HEP /Beijing, Inst. High Energy Phys.; Srivastava, A.; /Birla Inst. Tech. Sci.; Butler, J.M.; /Boston U.; Goldstein, Joel; Velthuis, J.; /Bristol U.; Radeka, V.; /Brookhaven; Zhu, R.-Y.; /Caltech.; Lutz, P.; /DAPNIA, Saclay; de Roeck, A.; Elsener, K.; Gaddi, A.; Gerwig, H.; /CERN /Cornell U., LNS /Ewha Women's U., Seoul /Fermilab /Gent U. /Darmstadt, GSI /Imperial Coll., London /Barcelona, Inst. Microelectron. /KLTE-ATOMKI /Valencia U., IFIC /Cantabria Inst. of Phys. /Louis Pasteur U., Strasbourg I /Durham U., IPPP /Kansas State U. /Kyungpook Natl. U. /Annecy, LAPP /LLNL, Livermore /Louisiana Tech. U. /Paris U., VI-VII /Paris U., VI-VII /Munich, Max Planck Inst. /MIT, LNS /Chicago, CBC /Moscow State U. /Nanjing U. /Northern Illinois U. /Obninsk State Nucl. Eng. U. /Paris U., VI-VII /Strasbourg, IPHC /Prague, Inst. Phys. /Princeton U. /Purdue U. /Rutherford /SLAC /SUNY, Stony Brook /Barcelona U. /Bonn U. /UC, Davis /UC, Santa Cruz /Chicago U. /Colorado U. /Delhi U. /Hawaii U. /Helsinki U. /Indiana U. /Iowa U. /Massachusetts U., Amherst /Melbourne U. /Michigan U. /Minnesota U. /Mississippi U. /Montenegro U. /New Mexico U. /Notre Dame U. /Oregon U. /Oxford U. /Ramon Llull U., Barcelona /Rochester U. /Santiago de Compostela U., IGFAE /Hefei, CUST /Texas U., Arlington /Texas U., Dallas /Tokyo U. /Washington U., Seattle /Wisconsin U., Madison /Wayne State U. /Yale U. /Yonsei U.

2012-04-11T23:59:59.000Z

154

VUV Detector Calibrations - Si Photodiode Description  

Science Conference Proceedings (OSTI)

... The extreme ultraviolet (5 nm to 50 nm) quantum efficiency of a Si photodiode is essentially the photon energy divided by the electron-hole pair ...

2011-12-30T23:59:59.000Z

155

Modification Research of Si3N4-SiC Heat Absorption Ceramic ...  

Science Conference Proceedings (OSTI)

Presentation Title, Modification Research of Si3N4-SiC Heat Absorption Ceramic Material Used for Tower Type Solar Thermal Power Plant. Author(s), Meng Liu, ...

156

Electrical conductivity of cellular Si ? Si C ceramic composites prepared from plant precursors  

Science Conference Proceedings (OSTI)

Electrical conductivity ( ? dc ) of the cellular Si ? Si C ceramic composites has been measured over a temperature range of 25 – 1073 K while the thermoelectric power ( S ) has been measured over 25 – 300 K . Remarkably

Debopriyo Mallick; Omprakash Chakrabarti; Dipten Bhattacharya; Manabendra Mukherjee; Himadri S. Maiti; Rabindranath Majumdar

2007-01-01T23:59:59.000Z

157

Low Temperature Synthesis of Carbon-Free Si3N4/SiC ...  

Science Conference Proceedings (OSTI)

Abstract Scope, In this study, we have investigated a possible method of synthesizing carbon-free, nano-silicon nitride-silicon carbide (Si3N4/SiC) powders for ...

158

Controlled Volume Fraction Si 3 N 4 /SiC Composites from Polymer ...  

Science Conference Proceedings (OSTI)

It is possible to form dense Si3N4/SiC composites with little to no liquid phase and grain sizes <100 nm. By tailoring the chemistry of the polymer precursor, the

159

FF4, SiGe/Si Selective Etch Structures for Nanowire Release and ...  

Science Conference Proceedings (OSTI)

1 To attain Ge-rich SiGe nanowire segment at temperatures above 400ºC, which is more compatible with SiNW growth conditions, disilane (1% in ...

160

NIST Guide to SI Units - Appendix A. Definitions of the SI Base ...  

Science Conference Proceedings (OSTI)

... that SI derived units are uniquely defined only in terms of SI base units; for example, 1 ... The kilogram is the unit of mass; it is equal to the mass of the ...

Note: This page contains sample records for the topic "tran si tion" 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

SiC MOSFETs with thermally oxidized Ta2Si stacked on SiO2 as high-k gate insulator  

Science Conference Proceedings (OSTI)

In this paper, we compare the electrical characteristics of MOS capacitors and lateral MOSFETs with oxidized Ta"2Si (O-Ta"2Si) as a high-k dielectric on silicon carbide or stacked on thermally grown SiO"2 on SiC. MOS capacitors are used to determine ... Keywords: High-k dielectric, MOSFET, Oxidation, SiC, Ta2Si, Tantalum silicide

A. Pérez-Tomás; M. R. Jennings; P. M. Gammon; G. J. Roberts; P. A. Mawby; J. Millán; P. Godignon; J. Montserrat; N. Mestres

2008-04-01T23:59:59.000Z

162

HIGH-ENERGY NEUTRINO AND GAMMA-RAY TRANSIENTS FROM TRANS-RELATIVISTIC SUPERNOVA SHOCK BREAKOUTS  

SciTech Connect

Trans-relativistic shocks that accompany some supernovae (SNe) produce X-ray burst emissions as they break out in the dense circumstellar medium around the progenitors. This phenomenon is sometimes associated with peculiar low-luminosity gamma-ray bursts (LL GRBs). Here, we investigate the high-energy neutrino and gamma-ray counterparts of such a class of SNe. Just beyond the shock breakout radius, particle acceleration in the collisionless shock starts to operate in the presence of breakout photons. We show that protons may be accelerated to sufficiently high energies and produce high-energy neutrinos and gamma rays via the photomeson interaction. These neutrinos and gamma rays may be detectable from {approx}< 10 Mpc away by IceCube/KM3Net as multi-TeV transients almost simultaneously with the X-ray breakout, and even from {approx}< 100 Mpc away with follow-up observations by the Cherenkov Telescope Array using a wide-field sky monitor like Swift as a trigger. A statistical technique using a stacking approach could also be possible for the detection, with the aid of the SN optical/infrared counterparts. Such multi-messenger observations offer the possibility to probe the transition of trans-relativistic shocks from radiation-mediated to collisionless ones, and would also constrain the mechanisms of particle acceleration and emission in LL GRBs.

Kashiyama, Kazumi; Gao, Shan; Meszaros, Peter [Center for Particle and Gravitational Astrophysics, Department of Astronomy and Astrophysics, Department of Physics, Pennsylvania State University, University Park, PA 16802 (United States); Murase, Kohta; Horiuchi, Shunsaku, E-mail: kzk15@psu.edu [CCAPP and Department of Physics, Ohio State University, 191 W. Woodruff Avenue, Columbus, OH 43210 (United States)

2013-05-20T23:59:59.000Z

163

Neurokinin-1 enables measles virus trans-synaptic spread in neurons  

SciTech Connect

Measles virus (MV), a morbillivirus that remains a significant human pathogen, can infect the central nervous system, resulting in rare but often fatal diseases, such as subacute sclerosing panencephalitis. Previous work demonstrated that MV was transmitted trans-synaptically and that, while a cellular receptor for the hemagglutinin (H) protein was required for MV entry, it was dispensable for subsequent cell-to-cell spread. Here, we explored what role the other envelope protein, fusion (F), played in trans-synaptic transport. We made the following observations: (1) MV-F expression in infected neurons was similar to that seen in infected fibroblasts; (2) fusion inhibitory peptide (FIP), an inhibitor of MV fusion, prevented both infection and spread in primary neurons; (3) Substance P, a neurotransmitter with the same active site as FIP, also blocked neuronal MV spread; and (4) both genetic deletion and pharmacological inhibition of the Substance P receptor, neurokinin-1 (NK-1), reduced infection of susceptible mice. Together, these data implicate a role for NK-1 in MV CNS infection and spread, perhaps serving as an MV-F receptor or co-receptor on neurons.

Makhortova, Nina R. [Division of Basic Science, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111 (United States); Askovich, Peter [Division of Basic Science, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111 (United States); Patterson, Catherine E. [Division of Basic Science, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111 (United States); Gechman, Lisa A. [Division of Basic Science, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111 (United States); Gerard, Norma P. [Children's Hospital, Perlmutter Laboratory, Boston, MA 02115 (United States); Rall, Glenn F. [Division of Basic Science, Fox Chase Cancer Center, 333 Cottman Avenue, Philadelphia, PA 19111 (United States)]. E-mail: glenn.rall@fccc.edu

2007-05-25T23:59:59.000Z

164

Hot-Wire Deposition of Hydrogenated Nanocrystalline SiGe Films for Thin-Film Si Based Solar Cells  

E-Print Network (OSTI)

Hot-Wire Deposition of Hydrogenated Nanocrystalline SiGe Films for Thin-Film Si Based Solar Cells bandgap absorber in an a-Si/a-SiGe/nc-SiGe(nc- Si) triple-junction solar cell due to its higher optical investigations of nc-SiGe:H thin films made by hot-wire chemical vapor deposition (HWCVD) with a coil

Deng, Xunming

165

High-Resolution Monte-Carlo Simulation of Flow and Conservative Trans-port in Heterogeneous Porous Media: 2, Transport Results  

E-Print Network (OSTI)

Media: 2, Transport Results R.L. Na U.S. Geological Survey Water Resources Division Denver, Colorado be present in these simula- tions but are more di cult to independently quantify Harter and Yeh, 1996

166

SiGeC Near Infrared Photodetectors  

E-Print Network (OSTI)

A near infrared waveguide photodetector in Si-based ternary Si?â??xâ??yGexCy alloy was demonstrated for 0.85~1.06 µm wavelength fiber-optic interconnection system applications. Two sets of detectors with active absorption ...

Li, Baojun

167

Role of hydrogen in SiH{sub 2} adsorption on Si(100)  

SciTech Connect

When disilane (Si{sub 2}H{sub 6}) is used in the homoepitaxial growth of Si by chemical vapor deposition (CVD), the fragment SiH{sub 2} is believed to be the basic unit adsorbed on the surface. The bonding site of SiH{sub 2} on Si(100) has been proposed in the literature to be either on top of a dimer (the on-dimer site) or between two dimers in the same row (the intrarow site). Since the pathway of SiH{sub 2} combination is dependent on the adsorption site, a first-principles calculation will shed light on the underlying process. We have performed self-consistent pseudopotential density-functional calculations within the local-density approximation. On the bare Si(100) surface, the on-dimer site is found to be more stable than the intrarow site, even though the former has unfavorable Si-Si bond angles. This is ascribed to the extra dangling bond created in the latter geometry when the weak dimer {pi} bonds are broken. However, the presence of hydrogen adatoms eliminates this difference and makes the intrarow site more favorable than the on-dimer site. It is therefore revealed in this theoretical study that hydrogen, an impurity unavoidable in the CVD process, plays an important role in determining the stable configuration of adsorbed SiH{sub 2} on Si(100) and hence affects the growth mechanism. {copyright} {ital 1998} {ital The American Physical Society}

Hong, S.; Chou, M.Y. [School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430 (United States)] [School of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332-0430 (United States)

1998-11-01T23:59:59.000Z

168

Synthesis of 4-substituted-trans-1, 2-diaminocyclohexyl polyaminocarboxylate metal chelating agents for the preparation of stable radiometal antibody immunoconjugates for therapy and spect and pet imaging  

DOE Patents (OSTI)

Cyclo agents useful in forming antibody-metal conjugates useful for diagnostic and therapeutic purposes. New compounds and processes of forming these compounds are disclosed including 4-haloacetamido-trans-1,2-diaminocyclohexyl polyaminocarboxylate and 4-isothiocyanato-trans-1,2-diamino cyclohexane-N,N,N',N'-tetra acetic acid.

Mease, Ronnie C. (Coram, NY); Mausner, Leonard F. (Stony Brook, NY); Srivastava, Suresh C. (Setauket, NY)

1994-01-01T23:59:59.000Z

169

Synthesis of 4-substituted-trans-1, 2-diaminocyclohexyl polyaminocarboxylate metal chelating agents for the preparation of stable radiometal antibody immunoconjugates for therapy and SPECT and PET imaging  

DOE Patents (OSTI)

Cyclo agents are described which are useful in forming antibody-metal conjugates which are used for diagnostic and therapeutic purposes. New compounds and processes of forming these compounds are disclosed including 4-haloacetamido-trans-1,2diaminocyclohexyl polyaminocarboxylate and 4-isothiocyanato-trans-1,2diamino cyclohexane-N,N,N',N'-tetra acetic acid. No Drawings

Mease, R.C.; Mausner, L.F.; Srivastava, S.C.

1994-03-08T23:59:59.000Z

170

Progress Towards Optimizing the PETSc Numerical Toolkit on the Richard Tran Mills, Eduardo F. D'Azevedo, and Mark R. Fahey  

E-Print Network (OSTI)

Progress Towards Optimizing the PETSc Numerical Toolkit on the Cray X1 Richard Tran Mills, Eduardo-implicit code for multiphase groundwater (Darcy) flow and reactive transport coauthored by Richard Mills performance tests. About the authors Richard Tran Mills is a Computational Scientist at the Center

171

Ceramic Coatings and Glass Additives for Improved SiCBased ...  

The phase diagram presented in reference11 sug-gests a mixture of liquid and SiO 2above 1030°C and formation of Bi 4 Si 3 O 12 and SiO 2 upon cooling. Mini-

172

Monolithic Ge-on-Si lasers for integrated photonics  

E-Print Network (OSTI)

We report room temperature Ge-on-Si lasers with direct gap emission at 1590-1610 nm. Modeling of Ge/Si double heterojunction structures, which is supported by experimental results of Ge/Si LEDs, indicates the feasibility ...

Liu, Jifeng

173

Effect of plasma treatments on interface chemistry and adhesion strength between porous SiO2 low-k film and SiC/SiN layers  

Science Conference Proceedings (OSTI)

In this study, the interface chemistry and adhesion strengths between porous SiO"2 low-dielectric-constant film and SiN capping layer as well as SiC etch stop layer have been investigated under different plasma treatments. Elements of Si, O, and N constructed ... Keywords: Bonding configuration, Dielectrics, Interface adhesion

Shou-Yi Chang; Yi-Chung Huang

2008-02-01T23:59:59.000Z

174

TEAM HEV ARC HITECTURE ENGIN E FU EL TRANS MISSION EN ERGY STOR  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

TEAM TEAM HEV ARC HITECTURE ENGIN E FU EL TRANS MISSION EN ERGY STOR AGE MO TOR Michigan Technological University Through-the-road Parallel 2.0-L 4 Cylinder Spark Ignition Reformulated Gasoline 4-speed Automatic COBASYS, Nickel Metal Hydride - 288V 50 kW Solectria AC Induction Transaxle Mississippi State University Through-the-road Parallel 1.9-L GM Direct Injection Turbo Diesel Bio Diesel (B20) GM F40 6-speed Manual Johnson Controls, Nickel Metal Hydride - 330V 45 kW Ballard Integrated Power Transaxle The Ohio State University Through-the-road Parallel 1.9-L GM Direct Injection Turbo Diesel Bio Diesel (B20) Aisin-Warner AF40 6-speed Automatic Transaxle Panasonic, Nickel Metal Hydride - 300V 67 kW Ballard AC Induction Transaxle /10.6 kW Kollmorgen Brushless DC Generator Pennsylvania State

175

Intervalley splittings of Si quantum wells  

E-Print Network (OSTI)

Multi-valley effective mass theory for silicon quantum well structure is studied taking into account the external fields and the quantum interfaces. It is found that the phenomenological delta function potential, employed to explain the valley splitting caused by the quantum well interface in the previous work [Ref. 10], can be derived self-consistently from the multi-valley effective mass theory. Finite element method is used to solve the multi-valley effective equations. Theoretical predictions are in a reasonably good agreement with the recent experimental observation of valley splitting in a SiO_{2}/Si/SiO_{2} quantum well, which prove the validity of our approach.

S. -H. Park; Y. Y. Lee; Doyeol Ahn

2007-11-05T23:59:59.000Z

176

Amorphous and nanocrystalline Mg2Si thin-film electrodes  

NLE Websites -- All DOE Office Websites (Extended Search)

Contact Us Department Contacts Media Contacts Amorphous and nanocrystalline Mg2Si thin-film electrodes Title Amorphous and nanocrystalline Mg2Si thin-film electrodes...

177

STABILITY OF METALLIC Si-, Fe-RICH ALLOYS, SiC AND GRAPHITE IN MIXED SUPERNOVA EJECTA.  

E-Print Network (OSTI)

STABILITY OF METALLIC Si-, Fe-RICH ALLOYS, SiC AND GRAPHITE IN MIXED SUPERNOVA EJECTA. L. Grossman1 the Murchison chondrite contain inclusions of TiC and Si-rich metal alloys but, in most cases, no SiC [1], while of TiC, SiC and a Si-rich metal alloy at a higher temperature than graphite when the expanding gas has

Grossman, Lawrence

178

Thermally Processed High-Mobility MOS Thin-Film Transistors on Transferable Single-Crystal Elastically Strain-Sharing Si/SiGe/Si Nanomembranes  

DOE Green Energy (OSTI)

Demonstration of high-performance MOS thin-film transistors (TFTs) on elastically strain-sharing single-crystal Si/SiGe/Si nanomembranes (SiNMs) that are transferred to foreign substrates is reported. The transferable SiNMs are realized by first growing pseudomorphic SiGe and Si layers on silicon-on-insulator (SOI) substrates, and then, selectively removing the buried oxide (BOX) layer from the SOI. Before the release, only the SiGe layer is compressively strained. Upon release, part of the compressive strain in the SiGe layer is transferred to the thin Si layers, and the Si layers, thus, become tensile strained. Both the initial compressive strain state in the SiGe layer and the final strain sharing state between the SiGe and the Si layers are verified with X-ray diffraction measurements. The TFTs are fabricated employing the conventional high-temperature MOS process on the strain-shared SiNMs that are transferred to an oxidized Si substrate. The transferred strained-sharing SiNMs show outstanding thermal stability and can withstand the high-temperature TFT process on the new host substrate. The strained-channel TFTs fabricated on the new host substrate show high current drive capability and an average electron effective mobility of 270 cm{sup 2}/V ldr s. The results suggest that transferable and thermally stable single-crystal elastically strain- sharing SiNMs can serve as excellent active material for high-speed device application with a simple and scalable transfer method. The demonstration of MOS TFTs on the transferable nanomembranes may create the opportunity for future high-speed Si CMOS heterogeneous integration on any substrate.

Yuan, H.-C.; Kelly, M. M.; Savage, D. E.; Lagally, M. G.; Celler, G. K.; Zhenqiang, M.

2008-03-01T23:59:59.000Z

179

Well-developed deformation in 42Si  

E-Print Network (OSTI)

Excited states in 38,40,42Si nuclei have been studied via in-beam gamma-ray spectroscopy with multi-nucleon removal reactions. Intense radioactive beams of 40S and 44S provided at the new facility of the RIKEN Radioactive Isotope Beam Factory enabled gamma-gamma coincidence measurements. A prominent gamma line observed with an energy of 742(8) keV in 42Si confirms the 2+ state reported in an earlier study. Among the gamma lines observed in coincidence with the 2+ -> 0+ transition, the most probable candidate for the transition from the yrast 4+ state was identified, leading to a 4+_1 energy of 2173(14) keV. The energy ratio of 2.93(5) between the 2+_1 and 4+_1 states indicates well-developed deformation in 42Si at N=28 and Z=14. Also for 38,40Si energy ratios with values of 2.09(5) and 2.56(5) were obtained. Together with the ratio for 42Si, the results show a rapid deformation development of Si isotopes from N=24 to N=28.

S. Takeuchi; M. Matsushita; N. Aoi; P. Doornenbal; K. Li; T. Motobayashi; H. Scheit; D. Steppenbeck; H. Wang; H. Baba; D. Bazin; L. Càceres; H. Crawford; P. Fallon; R. Gernhäuser; J. Gibelin; S. Go; S. Grévy; C. Hinke; C. R. Hoffman; R. Hughes; E. Ideguchi; D. Jenkins; N. Kobayashi; Y. Kondo; R. Krücken; T. Le Bleis; J. Lee; G. Lee; A. Matta; S. Michimasa; T. Nakamura; S. Ota; M. Petri; T. Sako; H. Sakurai; S. Shimoura; K. Steiger; K. Takahashi; M. Takechi; Y. Togano; R. Winkler; K. Yoneda

2012-07-26T23:59:59.000Z

180

Photoconductivity of Si/Ge multilayer structures with Ge quantum dots pseudomorphic to the Si matrix  

SciTech Connect

Longitudinal photoconductivity spectra of Si/Ge multilayer structures with Ge quantum dots grown pseudomorphically to the Si matrix are studied. Lines of optical transitions between hole levels of quantum dots and Si electronic states are observed. This allowed us to construct a detailed energy-level diagram of electron-hole levels of the structure. It is shown that hole levels of pseudomorphic Ge quantum dots are well described by the simplest 'quantum box' model using actual sizes of Ge islands. The possibility of controlling the position of the long-wavelength photosensitivity edge by varying the growth parameters of Si/Ge structures with Ge quantum dots is determined.

Talochkin, A. B., E-mail: tal@thermo.isp.nsc.ru; Chistokhin, I. B. [Russian Academy of Sciences, Rzhanov Institute of Semiconductor Physics, Siberian Branch (Russian Federation)

2011-07-15T23:59:59.000Z

Note: This page contains sample records for the topic "tran si tion" 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

Manufacture and Applications of C/C-SiC and C/SiC Composites  

Science Conference Proceedings (OSTI)

Therefore, fibre preforms are used and the SiC matrix is built up by Chemical Vapour Infiltration (CVI) or Polymer Infiltration and Pyrolysis (PIP). In contrast ...

182

Performance Comparison Study of SiC and Si Technology for an IPM Drive System  

SciTech Connect

The impact of the new SiC material based devices on a full system needs to be evaluated in order to assess the benefits of replacing Silicon (Si) devices with WBG devices. In this paper the results obtained with a full-system model simulated for an aggressive US06 drive cycle are presented. The system model includes a motor/generator model and inverter loss model developed using actual measured data. The results provide an insight to the difference in performance of a permanent magnet traction drive system using SiC versus Si devices.

Chinthavali, Madhu Sudhan [ORNL; Otaduy, Pedro J [ORNL; Ozpineci, Burak [ORNL

2010-01-01T23:59:59.000Z

183

Crystallization mechanisms and recording characteristics of Si/CuSi bilayer for write-once blu-ray disc  

SciTech Connect

The crystallization mechanisms of Si/CuSi bilayer and its recording characteristics for write-once blu-ray disc (BD-R) were investigated. It was found that Cu{sub 3}Si phase appeared during the room temperature sputtered deposition. Then, the Si atoms in CuSi layer segregated and crystallized to cubic Si in Cu{sub 3}Si nucleation sites as the film was annealed at 270 deg. C. After heating to 500 deg. C, the grains size of cubic Si phase grew and the hexagonal Si phase was observed. The dynamic tests show that the Si/CuSi bilayer has great feasibility for 1-4x BD-R with the bottom jitter values below 6.5%.

Ou, Sin-Liang; Kuo, Po-Cheng; Tsai, Tsung-Lin [Departmant of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan (China); Chen, Sheng-Chi [Department of Materials Engineering and Center for Thin Film Technologies and Applications, Ming Chi University of Technology, Taipei 243, Taiwan (China); Yeh, Chin-Yen; Chang, Han-Feng [CMC Magnetics Corporation, Taoyuan 333, Taiwan (China); Lee, Chao-Te; Chiang, Donyau [Instrument Technology Research Center, National Applied Research Laboratories, Hsinchu 300, Taiwan (China)

2011-09-19T23:59:59.000Z

184

Electrospun a-Si using Liquid Silane/Polymer Inks  

DOE Green Energy (OSTI)

Amorphous silicon nanowires (a-SiNWs) were prepared by electrospinning cyclohexasilane (Si{sub 6}H{sub 12}) admixed with polymethylmethacrylate (PMMA) in toluene. Raman spectroscopy characterization of these wires (d {approx} 50-2000 nm) shows 350 C treatment yields a-SiNWs. Porous a-SiNWs are obtained using a volatile polymer.

D.L. Schulz; J.M. Hoey; J. Smith; J. Lovaasen; C. Braun; X. Dai; K. Anderson; A. Elangovan; X. Wu; S. Payne; K. Pokhodnya; I. Akhatov; L. Pederson; P. Boudjouk

2010-12-01T23:59:59.000Z

185

Electrospun a-Si using Liquid Silane/Polymer Inks  

DOE Green Energy (OSTI)

Amorphous silicon nanowires (a-SiNWs) were prepared by electrospinning cyclohexasilane (Si{sub 6}H{sub 12}) admixed with polymethylmethacrylate (PMMA) in toluene. Raman spectroscopy characterization of these wires (d {approx} 50-2000 nm) shows 350 C treatment yields a-SiNWs. Porous a-SiNWs are obtained using a volatile polymer.

Doug Schulz

2010-12-09T23:59:59.000Z

186

Multilevel charge storage in Si nanocrystals arranged in double-dot-layers within SiO2  

Science Conference Proceedings (OSTI)

We investigated charging/discharging characteristics of a MOS structure with two layers of Si-nanocrystals (NCs) embedded in the SiO"2 dielectric. The two-dimensional (2D) arrays of nanocrystals, of sizes 3 and 5nm in the lower and upper NCs layer, respectively, ... Keywords: Electrical characterization, Non-volatile memories, Si-nanocrystal memories, Si-nanocrystals

M. Theodoropoulou; A. G. Nassiopoulou

2008-12-01T23:59:59.000Z

187

A molecular mechanics study of morphologic interaction between graphene and Si nanowires on a SiO2 substrate  

Science Conference Proceedings (OSTI)

We study the morphologic interaction between graphene and Si nanowires on a SiO2 substrate, using molecular mechanics simulations. Two cases are considered: (1) a graphene nanoribbon intercalated by a single Si nanowire on a SiO2 ...

Zhao Zhang; Teng Li

2011-01-01T23:59:59.000Z

188

Waveguide Electroabsorption Modulator on Si Employing Ge/SiGe Quantum Wells  

E-Print Network (OSTI)

Waveguide Electroabsorption Modulator on Si Employing Ge/SiGe Quantum Wells Onur Fidaner, Ali K. 2007 Optical Society of America OCIS codes: (230.4110) Modulators ; (230.5590) Quantum-well devices Low wells opened up the possibility of realizing small and power-efficient electroabsorption modulators

Miller, David A. B.

189

Small-Angle Neutron Scattering Studies of a-Si:H and a-Si:D  

DOE Green Energy (OSTI)

The heterogeneity of hydrogen and deuterium on the nanometer scale has been probed by samll-angle neutron scattering (SANS) from a-Si:H and a-Si:D films. Films were depsoited by two techniques, plasma-enhanced chemical vapor deposition (PECVD) and hot-wire chemical vapor deposition (HWCVD) using conditions that yield high quality films and devices.

Williamson, D. L.; Marr, D. W. M.; Nelson, B. P.; Iwaniczko, E.; Yang, J.; Yan, B.; Guha, S.

2000-01-01T23:59:59.000Z

190

Candidate stellar occultations by large trans-neptunian objects up to 2015  

E-Print Network (OSTI)

We study large trans-neptunian objects (TNOs) using stellar occultations. We derive precise astrometric predictions for stellar occultations by Eris, Haumea, Ixion, Makemake, Orcus, Quaoar, Sedna, Varuna, 2002 TX300, and 2003 AZ84 for 2011-2015. We construct local astrometric catalogs of stars in the UCAC2 (Second US Naval Observatory CCD Astrograph Catalog) frame covering the sky path of these objects. For that purpose, during 2007-2009, we carried out an observational program at the ESO2p2/WFI (2.2 m Max-Planck ESO telescope with the Wide Field Imager) instrument. Astrometric catalogs with proper motions were produced for each TNO, containing more than 5.35 million stars covering the sky paths with 30' width in declination. The magnitude completeness is about R = 19 with a limit of about R = 21. We predicted 2717 stellar occultation candidates for all targets. Ephemeris offsets with about from 50 mas to 100 mas precision were applied to each TNO orbit to improve the predictions. They were obtained during 20...

Assafin, M; Martins, R Vieira; Braga-Ribas, F; Sicardy, B; Andrei, A H; Neto, D N da Silva

2012-01-01T23:59:59.000Z

191

Trans-Planckian physics and signature change events in Bose gas hydrodynamics  

E-Print Network (OSTI)

We present an example of emergent spacetime as the hydrodynamic limit of a more fundamental microscopic theory. The low-energy, long-wavelength limit in our model is dominated by collective variables that generate an effective Lorentzian metric. This system naturally exhibits a microscopic mechanism allowing us to perform controlled signature change between Lorentzian and Riemannian geometries. We calculate the number of particles produced from a finite-duration Euclidean-signature event, where we take the position that to a good approximation the dynamics is dominated by the evolution of the linearized perturbations, as suggested by Calzetta and Hu [Phys. Rev. A 68 (2003) 043625]. We adapt the ideas presented by Dray et al. [Gen. Rel. Grav. 23 (1991) 967], such that the field and its canonical momentum are continuous at the signature-change event. We investigate the interplay between the underlying microscopic structure and the emergent gravitational field, focussing on its impact on particle production in the ultraviolet regime. In general, this can be thought of as the combination of trans-Planckian physics and signature-change physics. Further we investigate the possibility of using the proposed signature change event as an amplifier for analogue "cosmological particle production" in condensed matter experiments.

Silke Weinfurtner; Angela White; Matt Visser

2007-03-23T23:59:59.000Z

192

Film Si Solar Cells with Nano Si: Cooperative Research and Development Final Report, CRADA Number CRD-09-00356  

DOE Green Energy (OSTI)

Nevada Nanotechnology Center and Si group at NREL will work together to develop a-Si based solar cells with nano-Si technique. We will explore the existing a-Si based film solar cell technology at NREL and nano scale Si technology at Nevada Nanotechnology Center. By exchanging information, we will come; up with some new cell structures using nano-Si. We expect the new a-Si based cells will have optical enhancement or better electronic or optical properties of absorber layer to improve solar cell performance.

Wang, Q.

2011-05-01T23:59:59.000Z

193

Texture of CoSi2 Films on Si(111) (110) and (001) Substrates  

Science Conference Proceedings (OSTI)

Synchrotron radiation was used to study the texture of polycrystalline CoSi{sub 2} films that were formed by a solid-state reaction between a 30 nm Co film and Si(111), (110) and (001) substrates. All films were strongly textured, and several texture components were identified. We discuss the simultaneous occurrence of axiotaxy (i.e. alignment of lattice planes across the interface) and several different types of epitaxy in each of the films. Comparison of the different texture components observed on the three substrate orientations suggests a strong preference for the alignment of CoSi{sub 2}{l_brace}110{r_brace} planes in the film with Si{l_brace}110{r_brace} planes in the substrate, and twinning around Si[111] directions.

K De Keyser; C Detavernier; J Jordan-Sweet; C Lavoie

2011-12-31T23:59:59.000Z

194

Finite element simulation for ultraviolet excimer laser processing of patterned Si/SiGe/Si(100) heterostructures  

SciTech Connect

Ultraviolet (UV) Excimer laser assisted processing is an alternative strategy for producing patterned silicon germanium heterostructures. We numerically analyzed the effects caused by pulsed 193 Excimer laser radiation impinging on patterned amorphous hydrogenated silicon (a-Si:H) and germanium (a-Ge:H) bilayers deposited on a crystalline silicon substrate [Si(100)]. The proposed two dimensional axisymmetric numerical model allowed us to estimate the temperature and concentration gradients caused by the laser induced rapid melting and solidification processes. Energy density dependence of maximum melting depth and melting time evolution as well as three dimensional temperature and element distribution have been simulated and compared with experimentally obtained results.

Conde, J. C.; Chiussi, S.; Gontad, F.; Gonzalez, P. [Dpto. Fisica Aplicada, University of Vigo, E-36310 Vigo (Spain); Martin, E. [Dpto. Mecanica, Maquinas, Motores Termicos y Fluidos, University of Vigo, E-36310 Vigo (Spain); Serra, C. [CACTI, University of Vigo, E-36310 Vigo (Spain)

2010-07-05T23:59:59.000Z

195

Formation of an amorphous phase of Al-Si during dry wear of a Al-Si/SiCp composite  

SciTech Connect

The present study reports on the formation of an amorphous phase at the surface of an SiCp-Al/Si composite during reciprocal dry wear. By using transmission electron microscopy (TEM) together with EDX analysis, the characterization and the formation mechanism of the amorphous band are discussed. The present TEM investigation has shown the formation of an amorphous phase band induced by dry sliding wear on the Al matrix composite. The formation mechanism of this amorphous phases relates to some mechanical mixing alloying models proposed earlier. A full understanding of these transformations in the surface layers will lead to better control of wear in multiphase materials.

Li, X.Y.; Tandon, K.N. [Univ. of Manitoba, Winnipeg (Canada)

1995-08-01T23:59:59.000Z

196

Laboratory and tentative interstellar detection of trans-methyl formate using the publicly available Green Bank Telescope PRIMOS survey  

E-Print Network (OSTI)

The rotational spectrum of the higher-energy trans conformational isomer of methyl formate has been assigned for the first time using several pulsed-jet Fourier transform microwave spectrometers in the 6-60 GHz frequency range. This species has also been sought toward the Sagittarius B2(N) molecular cloud using the publicly available PRIMOS survey from the Green Bank Telescope. We detect seven absorption features in the survey that coincide with laboratory transitions of trans-methyl formate, from which we derive a column density of 3.1 (+2.6, -1.2) \\times 10^13 cm-2 and a rotational temperature of 7.6 \\pm 1.5 K. This excitation temperature is significantly lower than that of the more stable cis conformer in the same source but is consistent with that of other complex molecular species recently detected in Sgr B2(N). The difference in the rotational temperatures of the two conformers suggests that they have different spatial distributions in this source. As the abundance of trans-methyl formate is far higher ...

Neill, Justin L; Zaleski, Daniel P; Steber, Amanda L; Pate, Brooks H; Lattanzi, Valerio; Spezzano, Silvia; McCarthy, Michael C; Remijan, Anthony J

2012-01-01T23:59:59.000Z

197

Advances in Conjugated Linoleic Acid Research, Volume 3Chapter 4 Systematic Analysis of trans and Conjugated Linoleic Acids in Milk and Meat of Ruminants  

Science Conference Proceedings (OSTI)

Advances in Conjugated Linoleic Acid Research, Volume 3 Chapter 4 Systematic Analysis of trans and Conjugated Linoleic Acids in Milk and Meat of Ruminants Health Nutrition Biochemistry eChapters Health - Nutrition - Biochemistry Press

198

Deep Frying: Chemistry, Nutrition and Practical ApplicationsChapter 23 Options for Reducing/Eliminating trans Fatty Acids in Deep Fat Frying and Labeling Implications  

Science Conference Proceedings (OSTI)

Deep Frying: Chemistry, Nutrition and Practical Applications Chapter 23 Options for Reducing/Eliminating trans Fatty Acids in Deep Fat Frying and Labeling Implications Food Science Health Nutrition Biochemistry eChapters Food Science

199

Lipid Analysis and Lipidomics: New Techniques & ApplicationChapter 14 Application of FT-NIR for Rapid Determination of the Trans Fatty Acid Composition in Fats and Oils  

Science Conference Proceedings (OSTI)

Lipid Analysis and Lipidomics: New Techniques & Application Chapter 14 Application of FT-NIR for Rapid Determination of the Trans Fatty Acid Composition in Fats and Oils Methods and Analyses eChapters Methods - Analyses Books

200

Lipid Analysis and Lipidomics: New Techniques & ApplicationChapter 8 Analysis of trans-18:1 Fatty Acids by Silver Ion HPLC  

Science Conference Proceedings (OSTI)

Lipid Analysis and Lipidomics: New Techniques & Application Chapter 8 Analysis of trans-18:1 Fatty Acids by Silver Ion HPLC eChapters Methods - Analyses Books AOCS Press Downloadable pdf of Chapter 8 Analysis of tr

Note: This page contains sample records for the topic "tran si tion" 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

Soybeans: Chemistry, Production, Processing, and UtilizationChapter 15 Food Uses for Soybean Oil and Alternatives to Trans Fatty Acids in Foods  

Science Conference Proceedings (OSTI)

Soybeans: Chemistry, Production, Processing, and Utilization Chapter 15 Food Uses for Soybean Oil and Alternatives to Trans Fatty Acids in Foods Food Science Health Nutrition Biochemistry Processing Soybeans eChapters Food Science &

202

Lipid Analysis and Lipidomics: New Techniques & ApplicationChapter 15 Infrared Spectroscopy and Partial Least Square Calibration in Simultaneous Quantification of Isolated trans & CLA  

Science Conference Proceedings (OSTI)

Lipid Analysis and Lipidomics: New Techniques & Application Chapter 15 Infrared Spectroscopy and Partial Least Square Calibration in Simultaneous Quantification of Isolated trans & CLA Methods and Analyses eChapters Methods - Analyses Book

203

TransCom model simulations of CH? and related species: linking transport, surface flux and chemical loss with CH? variability in the troposphere and lower stratosphere  

E-Print Network (OSTI)

A chemistry-transport model (CTM) intercomparison experiment (TransCom-CH?) has been designed to investigate the roles of surface emissions, transport and chemical loss in simulating the global methane distribution. Model ...

Patra, P. K.

204

Cocoa Butter and Related CompoundsChapter 16 Molecular Interactions of Triacylglycerides in Blends of Cocoa Butter with trans-free Vegetable Oils  

Science Conference Proceedings (OSTI)

Cocoa Butter and Related Compounds Chapter 16 Molecular Interactions of Triacylglycerides in Blends of Cocoa Butter with trans-free Vegetable Oils Food Science Health Nutrition eChapters Food Science & Technology Health - Nutrition - Bioc

205

Fatty Acids in Health Promotion and Disease CausationChapter 16 Ruminal Metabolism of Fatty Acids: Modulation of Polyunsaturated, Conjugated, and trans Fatty Acids in Meat and Milk  

Science Conference Proceedings (OSTI)

Fatty Acids in Health Promotion and Disease Causation Chapter 16 Ruminal Metabolism of Fatty Acids: Modulation of Polyunsaturated, Conjugated, and trans Fatty Acids in Meat and Milk Health Nutrition Biochemistry eChapters Health - Nutrit

206

Fatty Acids in Health Promotion and Disease CausationChapter 12 Effects of Fatty Acids Containing a trans Double Bond on Body Composition  

Science Conference Proceedings (OSTI)

Fatty Acids in Health Promotion and Disease Causation Chapter 12 Effects of Fatty Acids Containing a trans Double Bond on Body Composition eChapters Press Downloadable pdf of Chapter 12 Effects of Fatty Acids Contai

207

Fatty Acids in Health Promotion and Disease CausationChapter 15 Trans Fatty Acids and Oxidative Transformations by Free Radicals: The Role in Health  

Science Conference Proceedings (OSTI)

Fatty Acids in Health Promotion and Disease Causation Chapter 15 Trans Fatty Acids and Oxidative Transformations by Free Radicals: The Role in Health Health Nutrition Biochemistry eChapters Health - Nutrition - Biochemistry Press ...

208

Fatty Acids in Health Promotion and Disease CausationChapter 13 Trans and Other Fatty Acids: Role in Diabetic Disease and Health  

Science Conference Proceedings (OSTI)

Fatty Acids in Health Promotion and Disease Causation Chapter 13 Trans and Other Fatty Acids: Role in Diabetic Disease and Health Health Nutrition Biochemistry eChapters Health - Nutrition - Biochemistry Press Downloadab

209

Si[subscript C]C[subscript Si] antisite pairs in SiC identified as paramagnetic defects with strongly anisotropic orbital quenching  

E-Print Network (OSTI)

The nearest-neighbor antisite pair defects in 4H-SiC, 6H-SiC, and 3C-SiC single crystals have been identified using electron paramagnetic resonance spectroscopy in combination with a nonperturbative ab initio scheme for ...

Ceresoli, Davide

210

Ag on Si(111) from basic science to application  

SciTech Connect

In our work we revisit Ag and Au adsorbates on Si(111)-7x7, as well as experiment with a ternary system of Pentacene, Ag and Si(111). Of particular interest to us is the Si(111)-({radical}3x{radical}3)R30{degree}–Ag (Ag-Si-{radical}3 hereafter). In this thesis I systematically e plore effects of Ag deposition on the Ag-Si-{radical}3 at different temperatures, film thicknesses and deposition fluxes. The generated insight of the Ag system on the Si(111) is then applied to generate novel methods of nanostructuring and nanowire growth. I then extend our expertise to the Au system on the Ag-Si(111) to gain insight into Au-Si eutectic silicide formation. Finally we explore behavior and growth modes of an organic molecule on the Ag-Si interface.

Belianinov, Aleksey

2012-04-04T23:59:59.000Z

211

Electron induced depassivation of H and D terminated Si/SiO{sub 2} interfaces  

DOE Green Energy (OSTI)

The authors have performed electron spin resonance and electrical measurements on SiO{sub 2}/Si structures subjected to anneals in 5% H{sub 2}/N{sub 2} or 5% D{sub 2}/N{sub 2} gases and subsequently injected with electrons using corona ions and ultra-violet radiation. Threshold voltage and transconductance measurements have also been made on 0.25 {micro}m metal-oxide-semiconductor transistors subjected to 400 C anneals in the same gases and subsequently aged by hot electron injection. The electrical data on SiO{sub 2}/Si structures indicates that the density of interface states increases as a result of electron injection but that there are only minor differences between H and D passivated interfaces. The data on P{sub b}, trivalent Si dangling bond, centers at the same interfaces observed by electron spin resonance is insufficiently accurate to enable them to observe any significant differences. The hot electron injection experiments on transistors, consistent with other authors, indicate that, for the limited number of measurements they have made, the transistor aging resulting from the generation of interface states is significantly reduced for devices annealed in the D containing gas as compared to those annealed in the H containing gas. The origins of some potential differences in annealing behavior between the SiO{sub 2}/Si structures and the 0.25 {micro}m transistors are suggested.

Devine, R.A.B.; Mourrain, C.; Bouzid, M.J. [France Telecom-CNET, Meylan (France); Warren, W.L.; Vanheusden, K. [Sandia National Labs., Albuquerque, NM (United States)

1997-02-01T23:59:59.000Z

212

Model Year 2010 Green Vehicle Guide Model Displ Cyl Trans Drive  

NLE Websites -- All DOE Office Websites (Extended Search)

Green Vehicle Guide Green Vehicle Guide Model Displ Cyl Trans Drive Fuel Sales Area Stnd Stnd Description Underhood ID Veh Class Air Pollution Score City MPG Hwy MPG Cmb MPG Greenhouse Gas Score SmartWay ACURA MDX 3.7 6 SemiAuto-6 4WD Gasoline CA U2 California LEV-II ULEV AHNXT03.7W19 SUV 7 16 21 18 4 no ACURA MDX 3.7 6 SemiAuto-6 4WD Gasoline FA B5 Federal Tier 2 Bin 5 AHNXT03.7W19 SUV 6 16 21 18 4 no ACURA RDX 2.3 4 SemiAuto-5 2WD Gasoline CA U2 California LEV-II ULEV AHNXT02.3Y19 SUV 7 19 24 21 5 no ACURA RDX 2.3 4 SemiAuto-5 4WD Gasoline CA U2 California LEV-II ULEV AHNXT02.3Y19 SUV 7 17 22 19 4 no ACURA RDX 2.3 4 SemiAuto-5 2WD Gasoline FA B5 Federal Tier 2 Bin 5 AHNXT02.3Y19 SUV 6 19 24 21 5 no ACURA RDX 2.3 4 SemiAuto-5 4WD Gasoline FA B5 Federal Tier 2 Bin 5 AHNXT02.3Y19 SUV 6 17 22 19 4 no ACURA RL 3.7 6 SemiAuto-5 4WD Gasoline CA U2 California LEV-II ULEV AHNXV03.7PB9 midsize car

213

Model Year 2011 Green Vehicle Guide Model Displ Cyl Trans Drive  

NLE Websites -- All DOE Office Websites (Extended Search)

Green Vehicle Guide Green Vehicle Guide Model Displ Cyl Trans Drive Fuel Sales Area Stnd Stnd Description Underhood ID Veh Class Air Pollution Score City MPG Hwy MPG Cmb MPG Greenhouse Gas Score SmartWay ACURA MDX 3.5 6 SemiAuto-6 4WD Gasoline CA U2 California LEV-II ULEV BHNXT03.7M19 SUV 6 16 21 18 3 no ACURA MDX 3.5 6 SemiAuto-6 4WD Gasoline FA B5 Federal Tier 2 Bin 5 BHNXT03.7M19 SUV 5 16 21 18 3 no ACURA RDX 2.3 4 SemiAuto-5 2WD Gasoline CA U2 California LEV-II ULEV BHNXT02.3X19 SUV 6 19 24 21 4 no ACURA RDX 2.3 4 SemiAuto-5 4WD Gasoline CA U2 California LEV-II ULEV BHNXT02.3X19 SUV 6 17 22 19 3 no ACURA RDX 2.3 4 SemiAuto-5 2WD Gasoline FA B5 Federal Tier 2 Bin 5 BHNXT02.3X19 SUV 5 19 24 21 4 no ACURA RDX 2.3 4 SemiAuto-5 4WD Gasoline FA B5 Federal Tier 2 Bin 5 BHNXT02.3X19 SUV 5 17 22 19 3 no ACURA RL 3.7 6 SemiAuto-6 4WD Gasoline CA U2 California LEV-II ULEV BHNXV03.7PB9 midsize car

214

Model Year 2012 Green Vehicle Guide Model Displ Cyl Trans Drive  

NLE Websites -- All DOE Office Websites (Extended Search)

Green Vehicle Guide Green Vehicle Guide Model Displ Cyl Trans Drive Fuel Sales Area Stnd Stnd Description Underhood ID Veh Class Air Pollution Score City MPG Hwy MPG Cmb MPG Greenhouse Gas Score SmartWay ACURA MDX 3.7 6 SemiAuto-6 4WD Gasoline FA B5 Federal Tier 2 Bin 5 CHNXT03.7R19 SUV 5 16 21 18 3 no ACURA MDX 3.7 6 SemiAuto-6 4WD Gasoline CA U2 California LEV-II ULEV CHNXT03.7R19 SUV 6 16 21 18 3 no ACURA RDX 2.3 4 SemiAuto-5 4WD Gasoline FA B5 Federal Tier 2 Bin 5 CHNXT02.3Y19 SUV 5 17 22 19 3 no ACURA RDX 2.3 4 SemiAuto-5 4WD Gasoline CA U2 California LEV-II ULEV CHNXT02.3Y19 SUV 6 17 22 19 3 no ACURA RDX 2.3 4 SemiAuto-5 2WD Gasoline FA B5 Federal Tier 2 Bin 5 CHNXT02.3Y19 SUV 5 19 24 21 4 no ACURA RDX 2.3 4 SemiAuto-5 2WD Gasoline CA U2 California LEV-II ULEV CHNXT02.3Y19 SUV 6 19 24 21 4 no ACURA TL 3.5 6 SemiAuto-6 2WD Gasoline FA B5 Federal Tier 2 Bin 5 CHNXV03.5EB3 midsize car 5

215

Electronic structure calculations with the Tran-Blaha modified Becke-Johnson Density Functional  

Science Conference Proceedings (OSTI)

We report a series of calculations testing the predictions of the Tran-Blaha functional for the electronic structure and magnetic properties of condensed systems. We find a general improvement in the properties of semiconducting and insulating systems, relative to calculations with standard generalized gradient approximations, although this is not always by the same mechanism as other approaches such as the quasiparticle GW method. In ZnO the valence bands are narrowed and the band gap is increased to a value in much better agreement with experiment. The Zn d states do not move to higher binding energy as they do in local-density approximation+U calculations. The functional is effective for systems with hydride anions, where correcting self-interaction errors in the 1s state is important. Similarly, it correctly opens semiconducting gaps in the alkaline-earth hexaborides. It correctly stabilizes an antiferromagnetic insulating ground state for the undoped cuprate parent CaCuO{sub 2}, but seriously degrades the agreement with experiment for ferromagnetic Gd relative to the standard local-spin-density approximation and generalized gradient approximations. This is due to positioning of the minority-spin 4f states at too low an energy. Conversely, the position of the La 4f conduction bands of La{sub 2}O{sub 3} is in reasonable accord with experiment as it is with standard functionals. The functional narrows the Fe d bands of the parent compound LaFeAsO of the iron high-temperature superconductors while maintaining the high Fe spectral weight near the Fermi energy.

Singh, David J [ORNL

2010-01-01T23:59:59.000Z

216

Intern experience at Tech Tran Corporation, Naperville, Illinois: an internship report  

E-Print Network (OSTI)

This report presents a survey of the author's internship experience with Tech Tran Corporation during the period September 3, 1981 through April 30, 1982. The eight month internship was spent as an engineering intern with a small consulting firm specializing in high technology state-of-the-art manufacturing technology management and assessment. The intent of this report is to demonstrate that this experience fulfills the requirements of the Doctor of Engineering internship. The primary objective of the internship was to develop technical expertise in the field of industrial automation. Secondary goals were to improve oral and written communication skills and project management techniques. The three projects presented in this report met these objectives and goals. The major project was to develop a state-of-the-art assessment of robotics. This assessment was developed by surveying hundreds of robots users, manufacturers and researchers, and undertaking a comprehensive literature search on U.S. and foreign robots. The information was distilled into a professional managerial level report on robotics. The second project was to develop technical summaries and assessments of completed projects of the Army Missile Command's Manufacturing Technology Program. This was performed by reviewing project reports and interviewing government and contractor engineers throughout the country. The third project was to be an Associate Editor for Manufacturing Technoogy Horizons digest. This is a bi-monthly digest featuring major developments in manufacturing techniques and equipment. Short concise summaries for manufacturing processes were researched and developed through written correspondence and phone interviews. The internship was an opportunity to use my engineering skills to learn about the robotics industry, and improve oral and written communication skills. Thus, objectives for the Doctor of Engineering degree were met and the internship requirement satisfied.

Campbell, John Arthur, 1947-

1983-05-01T23:59:59.000Z

217

Operational Challenges in Gas-To-Liquid (GTL) Transportation Through Trans Alaska Pipeline System (TAPS)  

Science Conference Proceedings (OSTI)

Oil production from Alaskan North Slope oil fields has steadily declined. In the near future, ANS crude oil production will decline to such a level (200,000 to 400,000 bbl/day) that maintaining economic operation of the Trans-Alaska Pipeline System (TAPS) will require pumping alternative products through the system. Heavy oil deposits in the West Sak and Ugnu formations are a potential resource, although transporting these products involves addressing important sedimentation issues. One possibility is the use of Gas-to-Liquid (GTL) technology. Estimated recoverable gas reserves of 38 trillion cubic feet (TCF) on the North Slope of Alaska can be converted to liquid with GTL technology and combined with the heavy oils for a product suitable for pipeline transport. Issues that could affect transport of this such products through TAPS include pumpability of GTL and crude oil blends, cold restart of the pipeline following a prolonged winter shutdown, and solids deposition inside the pipeline. This study examined several key fluid properties of GTL, crude oil and four selected blends under TAPS operating conditions. Key measurements included Reid Vapor Pressure, density and viscosity, PVT properties, and solids deposition. Results showed that gel strength is not a significant factor for the ratios of GTL-crude oil blend mixtures (1:1; 1:2; 1:3; 1:4) tested under TAPS cold re-start conditions at temperatures above - 20 F, although Bingham fluid flow characteristics exhibited by the blends at low temperatures indicate high pumping power requirements following prolonged shutdown. Solids deposition is a major concern for all studied blends. For the commingled flow profile studied, decreased throughput can result in increased and more rapid solid deposition along the pipe wall, resulting in more frequent pigging of the pipeline or, if left unchecked, pipeline corrosion.

Godwin A. Chukwu; Santanu Khataniar; Shirish Patil; Abhijit Dandekar

2006-06-30T23:59:59.000Z

218

Development of Readout Interconnections for the Si-W Calorimeter of SiD  

Science Conference Proceedings (OSTI)

The SiD collaboration is developing a Si-W sampling electromagnetic calorimeter, with anticipated application for the International Linear Collider. Assembling the modules for such a detector will involve special bonding technologies for the interconnections, especially for attaching a silicon detector wafer to a flex cable readout bus. We review the interconnect technologies involved, including oxidation removal processes, pad surface preparation, solder ball selection and placement, and bond quality assurance. Our results show that solder ball bonding is a promising technique for the Si-W ECAL, and unresolved issues are being addressed.

Woods, M.; Fields, R.G.; Holbrook, B.; Lander, R.L.; Moskaleva, A.; Neher, C.; Pasner, J.; Tripathi, M.; /UC, Davis; Brau, J.E.; Frey, R.E.; Strom, D.; /Oregon U.; Breidenbach, M.; Freytag, D.; Haller, G.; Herbst, R.; Nelson, T.; /SLAC; Schier, S.; Schumm, B.; /UC, Santa Cruz

2012-09-14T23:59:59.000Z

219

Electronic structure of graphite/6H-SiC interfaces  

E-Print Network (OSTI)

Abstract. We have studied the electronic structure of the interface between 6H-SiC{0001} and graphite. On n-type and p-type 6H-SiC(0001) we observe Schottky barriers of ?Si b,n = 0.3±0.1 eV and ?Si b,p = 2.7±0.1 eV, respectively. The observed barrier is face specific: on n-type 6H-SiC(0001) we find ?C b,n = 1.3±0.1 eV. The impact of these barriers on the electrical properties of metal/SiC contacts is discussed.

Th. Seyller; K. V. Emtsev; F. Speck; K. -y. Gao; L. Ley

2006-01-01T23:59:59.000Z

220

Alumina-SiC whisker composites  

DOE Green Energy (OSTI)

Previous results have shown that alumina reinforced with SiC whiskers is an attractive material for application in advanced heat engines. This composite exhibits excellent strength and toughness up to temperatures of approx.1000/sup 0/C and is very resistant to slow crack growth. Reinforcement of a mullite matrix by the SiC whiskers has also been demonstrated. Recent experiments have investigated other aspects to applying the SiC whisker-reinforced alumina in heat engines. The results have shown the whisker reinforced alumina to have excellent thermal shock resistance, and a good Weibull modulus (indicating good reliability). Fabrication of high toughness composites by pressureless sintering was found to be a viable process for alumina with whisker contents <20 vol %. In addition, whisker reinforcement may be combined with transformation toughening in the alumina and mullite matrix systems for improved mechanical properties. Isothermal heating tests indicated that oxidation of the SiC whiskers in an alumina matrix caused degradation of mechanical properties in currently developed materials.

Tiegs, T.N.; Becher, P.F.

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tran si tion" 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

PROTECTION OF SiSiO2 INTERFACES FROM DAMP HEAT BY OVERLYING SiNx AND Si3N4 COATINGS  

E-Print Network (OSTI)

-heat conditions of the standard reliability tests for PV modules. The samples are diffused with phosphorus. These results suggest that high- efficiency silicon cells would fail the damp-heat reliability test if their SiNx. INTRODUCTION Oxide-passivated silicon degrades when exposed to the "damp-heat" reliability test [1­4]. The test

222

Universal Converter Using SiC  

SciTech Connect

The grantee designed a high power (over 1MW) inverter for use in renewable and distributed energy systems, such as PV cells, fuel cells, variable speed wind turbines, micro turbines, variable speed gensets and various energy storage methods. The inverter uses 10,000V SiC power devices which enable the use of a straight-forward topology for medium voltage (4,160VAC) without the need to cascade devices or topologies as is done in all commercial, 4,160VAC inverters today. The use of medium voltage reduces the current by nearly an order of magnitude in all current carrying components of the energy system, thus reducing size and cost. The use of SiC not only enables medium voltage, but also the use of higher temperatures and switching frequencies, further reducing size and cost. In this project, the grantee addressed several technical issues that stand in the way of success. The two primary issues addressed are the determination of real heat losses in candidate SiC devices at elevated temperature and the development of high temperature packaging for SiC devices.

Dallas Marckx; Brian Ratliff; Amit Jain; Matthew Jones

2007-01-01T23:59:59.000Z

223

Ni-Si Alloys for the S-I Reactor-Hydrogen Production Process Interface  

DOE Green Energy (OSTI)

The overall goal of this project was to develop Ni-Si alloys for use in vessels to contain hot, pressurized sulfuric acid. The application was to be in the decomposition loop of the thermochemical cycle for production of hydrogen.

Joseph W. Newkirk; Richard K. Brow

2010-01-21T23:59:59.000Z

224

Interaction of ultrashort X-ray pulses with B4C, SiC and Si  

E-Print Network (OSTI)

The interaction of 32.5 and 6 nm ultrashort X-ray pulses with the solid materials B4C, SiC and Si is simulated with a non-local thermodynamic equilibrium (NLTE) radiation transfer code. We study the ionization dynamics as function of depth in the material, modifications of the opacity during irradiation and estimate crater depth. Furthermore, we compare the estimated crater depth with experimental data, for fluences up to 2.2 J/cm2. Our results show that at 32.5 nm irradiation, the opacity changes with less than a factor of 2 for B4C and Si and a factor of 3 for SiC, for fluences up to 200 J/cm2. At a laser wavelength of 6 nm, the model predicts a dramatic decrease in opacity due to the weak inverse bremsstrahlung, increasing the crater depth for high fluences.

Bergh, M; Hau-Riege, S P; Scott, H A

2007-01-01T23:59:59.000Z

225

Advanced SiC Power Technology for Power Technology for ...  

Science Conference Proceedings (OSTI)

... 1200 V/20A SiC MOSFETs 7kW 750V DC link 3-Phase Solar Inverter (Fraunhofer Institute, Freiberg Germany) ... Collector SiC P-IGBT Structure Gate ...

2012-08-02T23:59:59.000Z

226

Synthesis of SiC nanorods from bleached wood pulp  

DOE Green Energy (OSTI)

Unbleached and bleached soft wood pulps have been used as templates and carbon precursors to produce SiC nanorods. Hydrolyzed tetraethylorthosilicate (TEOS), Silicic acid was infiltrated into the pulps followed by a carbothermal reduction to form SiC nanorods at 1400oC in Ar. Residual carbon formed along with SiC was removed by gasification at 700oC in air. The SiC materials prepared from unbleached pulp were non-uniform SiC with a thick SiO2 coating, while the SiC nanorods prepared from the bleached pulp were uniform and straight with dimensions of 250 nm in diameter and 5.0 mm long. The formation of uniform camelback structure of SiC in the reaction between silica and bleached pulp is attributed to more silica deposited in the amorphous region of cellulose.

Shin, Yongsoon; Wang, Chong M.; Samuels, William D.; Exarhos, Gregory J.

2007-05-01T23:59:59.000Z

227

Characterization of SiC Nanostructure Formation and Growth Using ...  

Science Conference Proceedings (OSTI)

Previous studies showed the formation of SiC nanocones from the reaction between SiO and carbon shells with encapsulated iron at 1300°C in an inert ...

228

30vol%SiC at Ultra-high Temperatures  

Science Conference Proceedings (OSTI)

Presentation Title, SiC-depletion in ZrB2-30vol%SiC at Ultra-high Temperatures. Author(s), K N Shugart, E. J. Opila. On-Site Speaker (Planned), K N Shugart.

229

SiG Solar GmbH | Open Energy Information  

Open Energy Info (EERE)

SiG Solar GmbH Jump to: navigation, search Name SiG Solar GmbH Place Stuhr-Brinkum, Germany Zip 28816 Sector Solar Product Supplier of mounting systems, and trade name in Germany...

230

Ge-on-Si laser operating at room temperature  

E-Print Network (OSTI)

Monolithic lasers on Si are ideal for high-volume and large-scale electronic–photonic integration. Ge is an interesting candidate owing to its pseudodirect gap properties and compatibility with Si complementary metal oxide ...

Liu, Jifeng

231

FRV SI Transport Solar LP | Open Energy Information  

Open Energy Info (EERE)

FRV SI Transport Solar LP Jump to: navigation, search Name FRV SI Transport Solar LP Place Arizona Utility Id 56827 References EIA Form EIA-861 Final Data File for 2010 -...

232

Electronic Origin For The Phase Transition From Amorphous LixSi To Crystalline Li15Si4  

SciTech Connect

Silicon has been widely explored as an anode material for lithium ion battery. Upon lithiation, silicon transforms to amorphous LixSi (a-LixSi) via electrochemical driven solid state amorphization. With increasing lithium concentration, a-LixSi transforms to crystalline Li15Si4 (c-Li15Si4). The mechanism of this crystallization process is not known. In this paper, we report the fundamental characteristics of the phase transition of a-LixSi to c-Li15Si4 using in-situ scanning transmission electron microscopy (STEM), electron energy loss spectroscopy (EELS), and density function theory (DFT) calculation. We find that when the lithium concentration in a-LixSi reaches a critical value of x = 3.75, the a-Li3.75Si spontaneously and congruently transforms to c-Li15Si4 by a process that is solely controlled by the lithium concentration in the a-LixSi, involving neither large scale atomic migration nor phase separation. DFT calculations indicate that c-Li15Si4 formation is favored over other possible crystalline phases due to the similarity in electronic structure with a-Li3.75Si.

Gu, Meng; Wang, Zhiguo; Connell, Justin G.; Perea, Daniel E.; Lauhon, Lincoln J.; Gao, Fei; Wang, Chong M.

2013-06-24T23:59:59.000Z

233

Fiber/Matrix Interfacial Thermal Conductance Effect on the Thermal Conductivity of SiC/SiC Composites  

SciTech Connect

SiC/SiC composites used in fusion reactor applications are subjected to high heat fluxes and require knowledge and tailoring of their in-service thermal conductivity. Accurately predicting the thermal conductivity of SiC/SiC composites as a function of temperature will guide the design of these materials for their intended use, which will eventually include the effects of 14-MeV neutron irradiations. This paper applies an Eshelby-Mori-Tanaka approach (EMTA) to compute the thermal conductivity of unirradiated SiC/SiC composites. The homogenization procedure includes three steps. In the first step EMTA computes the homogenized thermal conductivity of the unidirectional (UD) SiC fiber embraced by its coating layer. The second step computes the thermal conductivity of the UD composite formed by the equivalent SiC fibers embedded in a SiC matrix, and finally the thermal conductivity of the as-formed SiC/SiC composite is obtained by averaging the solution for the UD composite over all possible fiber orientations using the second-order fiber orientation tensor. The EMTA predictions for the transverse thermal conductivity of several types of SiC/SiC composites with different fiber types and interfaces are compared to the predicted and experimental results by Youngblood et al.

Nguyen, Ba Nghiep; Henager, Charles H.

2013-04-20T23:59:59.000Z

234

Novel Design of Nanostructured Si Anode on Nanohair Array ...  

Science Conference Proceedings (OSTI)

Symposium, Nanostructured Materials for Lithium Ion Batteries and for Supercapacitors. Presentation Title, Novel Design of Nanostructured Si Anode on  ...

235

Near-Field Microscopy Through a SiC Superlens  

E-Print Network (OSTI)

Near-Field Microscopy Through a SiC Superlens Thomas Taubner,1 * Dmitriy Korobkin,2 Yaroslav of the slab (4­6). In our experiment, we placed a SiC superlens (7) between the scan- ning probe tip-crystalline SiC membrane coated on both sides with 220-nm-thick SiO2 layers (7). The two surfaces of the sandwich

Shvets, Gennady

236

Fracture and Delamination in Thin Film Si Electrodes  

Science Conference Proceedings (OSTI)

Symposium, Nanostructured Materials for Lithium Ion Batteries and for Supercapacitors. Presentation Title, Fracture and Delamination in Thin Film Si Electrodes.

237

The Impact of Energy Shortage and Cost on Irrigation for the High Plains and Trans Pecos Regions of Texas  

E-Print Network (OSTI)

The High Plains and Trans Pecos regions of Texas are semi-arid crop production regions located in the western part of the state. Relatively low levels of rainfall are supplemented by irrigation from groundwater supplies. These regions produced 51 percent of the cotton, 42 percent of the grain sorghum, and 48 percent of the wheat produced in Texas in 1974 (Texas Crop and Livestock Reporting Service). Considering only irrigated production these percentages were 75, 85, and 91 percent of Texas irrigated crop production for cotton, grain sorghum and wheat respectively. The importance of the High Plains and Trans Pecos regions to Texas crop production are not limited to these three crops, however, these statistics do serve to illustrate the significance of these regions in the Texas agricultural economy. While it is easily seen that the majority of irrigated production (for the crops mentioned) in Texas occurs in these regions, it should be noted that the importance of irrigation in the High Plains and Trans Pecos regional economies is much greater than these statistics show. On the High Plains 86 percent of the cotton, 90 percent of the grain sorghum, and 75 percent of the wheat produced in 1974 was harvested from irrigated acreage. Rainfall is somewhat less in the Trans Pecos region and 100 percent of the production of these crops was under irrigation (Texas Crop and Livestock Reporting Service). More than 60 percent of the value of agricultural crops in Texas is produced on irrigated land (Knutson, et.al.). Thus, the crop production of these regions is vitally important to the Texas and respective regional economies. Crop yields are heavily dependent on groundwater irrigation and extremely sensitive to any factor which may affect the availability or cost of irrigation water. Availability and price of fuel used in pumping groundwater are the critical factors which directly affect the availability and cost of irrigation water. About 39 percent of the energy used in Texas agriculture in 1973 was utilized in pumping water, compared to 18 percent used in machinery operations. Of this irrigation fuel, 76 percent was natural gas, the majority of which was consumed in the High Plains (Coble and LePori). Current supplies and reserves of natural gas have reached critically low levels in recent years and producers in the High Plains and Trans Pecos regions are faced with possible curtailments of, and certain price increases for their irrigation fuel (Patton and Lacewell). The threat of possible curtailment of fuel supplies during the irrigation season imposes greatly increased risk to irrigated crop production since curtailment of natural gas supplies during a critical water use period would significantly reduce yields (Lacewell). This threat would also increase financial risk and restrict availability of credit. Continued price increases for natural gas will increase costs of pumping irrigation water and hence the costs of irrigated crop production (Patton and Lacewell). The Ogalalla aquifer underlying the High Plains and many of the alluvium aquifers underlying the Trans Pecos are exhaustible; i.e., there is a negligible recharge from percolation and other sources. Therefore, even with unchanged natural gas prices, these groundwater supplies are being "economically" exhausted over time as pumping depth increases. Increases in fuel prices will lead to reduced groundwater pumpage and result in less groundwater being economically recoverable. Although life of the physical supply will be exhausted, a greater quantity of groundwater will be economically unrecoverable for irrigation without significant product price increases.

Lacewell, R. D.; Condra, G. D.; Hardin, D. C.; Zavaleta, L.; Petty, J. A.

1978-01-01T23:59:59.000Z

238

Integration of low dimensional crystalline Si into functional epitaxial oxides  

Science Conference Proceedings (OSTI)

In this work we show that by efficiently exploiting the growth kinetics during molecular beam epitaxy (MBE) one could create Si nanostructures of different dimensions. Examples are Si quantum dots (QD) or quantum wells (QW), which are buried into an ... Keywords: Epitaxial gadolinium oxide, Nonvolatile memories, Oxide-semiconductor-oxide quantum well, Resonant tunneling diode, Si quantum dots

Apurba Laha; E. Bugiel; R. Dargis; D. Schwendt; M. Badylevich; V. V. Afanas'ev; A. Stesmans; A. Fissel; H. J. Osten

2009-03-01T23:59:59.000Z

239

Growth of AlN/SiC/AlN quantum wells on Si(111) by molecular beam epitaxy  

SciTech Connect

AlN/SiC/AlN quantum well structures have been grown on Si(111) by molecular beam epitaxy at 700 deg. C. The microstructure is single-crystal wurtzite AlN and cubic SiC with stacking sequence disorder. Depth profiles taken by Auger electron spectroscopy indicate that the ratio of Si to C is about 5:4. Layers with lower carbon content exhibit regions with five-fold superstructures. Fourier transform infrared spectroscopy confirms the presence of Al-N and Si-C bonds. Our work demonstrates the feasibility of a low-temperature synthesis route for epitaxial SiC and AlN/SiC heterostructures on Si.

Cheng Yana [Department of Physics, Brown University, Providence, Rhode Island 02912 (United States); Beresford, Roderic [School of Engineering, Brown University, Providence, Rhode Island 02912 (United States)

2012-06-04T23:59:59.000Z

240

EIS-0450: TransWest Express 600 kV Direct Current Transmission Project in Wyoming, Colorado, Utah, and Nevada  

Energy.gov (U.S. Department of Energy (DOE))

Draft Environmental Impact Statement: Public Comment Period Ends 09/25/13This EIS, being prepared jointly by DOE’s Western Area Power Administration and the Department of the Interior’s Bureau of Land Management (Wyoming State Office), evaluates the environmental impacts of granting a right-of-way for the TransWest Express 600-kilovolt Direct Current Transmission Project and amending a land use plan. The project consists of an overhead transmission line that would extend approximately 725 miles from south-central Wyoming, through Colorado and Utah. Western proposes to be a joint owner of the project.

Note: This page contains sample records for the topic "tran si tion" 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

Method for enhancing growth of SiO.sub.2 in Si by the implantation of germanium  

DOE Patents (OSTI)

A method for enhancing the conversion of Si to SiO.sub.2 in a directional fashion wherein steam or wet oxidation of Si is enhanced by the prior implantation of Ge into the Si. The unique advantages of the Ge impurity include the directional enhancement of oxidation and the reduction in thermal budget, while at the same time, Ge is an electrically inactive impurity.

Holland, Orin W. (Oak Ridge, TN); Fathy, Dariush (Knoxville, TN); White, Clark W. (Oak Ridge, TN)

1990-04-24T23:59:59.000Z

242

Relative free energies of Si surfaces  

Science Conference Proceedings (OSTI)

Cavities are formed by ion implanting (001) Si with He and annealing at 800?°C to enlarge and to remove the He. Subsequent annealing at 600?°C results in cavities with well?defined facets as seen in [110] cross section with transmission electron microscopy. The most frequently observed facets are {111} planes. A rounded surface is seen about the [001] direction of all cavities

D. M. Follstaedt

1993-01-01T23:59:59.000Z

243

The Influence of Strain Relaxation on the Electrical Properties of Submicron Si/SiGe Resonant-Tunneling Diodes  

Science Conference Proceedings (OSTI)

Resonant tunneling devices (RTDs) and resonant tunneling transistors (RTTs) are possible building blocks with increased functionality of future microelectronic circuits. These quantum devices can be made in the Si/SiGe system, which is compatible with ... Keywords: SiGe, resonant tunneling, strain relaxation

P. W. Lukey; J. Caro; T. Zijlstra; E. van der Drift; S. Radelaar

2000-06-01T23:59:59.000Z

244

Alumina-SiC whisker composites  

DOE Green Energy (OSTI)

Alumina-SiC whisker ceramic composites have recently come into prominence for structural applications because of their potential for high strength and fracture toughness. Because of its very attractive mechanical properties, alumina reinforced with SiC whiskers is a good candidate for use in advanced heat engines. Ceramics for use in advanced heat engine applications must meet numerous property requirements. Obviously, they must be strong and tough at room and elevated temperatures and have high reliability. Because of the lifetime requirements demanded in commercial engines, the materials also need to be resistant to thermal shock, slow crack growth, creep and corrosion. For high volume/low cost production of engine parts, the ceramics have to be economically fabricable to near-net-shape and this requires the ability to pressureless sinter the materials. The SiC whisker-reinforced alumina ceramic composites developed have been examined with these criteria in mind. Other characteristics, such as wear resistance and joining to metals, are also important and are presently being determined.

Tiegs, T.N.; Becher, P.F.

1985-01-01T23:59:59.000Z

245

Application to export electric energy OE Docket No. EA-216-C TransAlta Energy Marketing (U.S) Inc: Federal Register Notice Volume 76, No. 14- Jan. 21, 2011  

Energy.gov (U.S. Department of Energy (DOE))

Application from TransAlta Energy Marketing (U.S) Inc to export electric energy to Canada.  Federal Register Notice Vol 76 No 14

246

Design of Twin Structures in SiC Nanowires  

SciTech Connect

With covalent bonding, SiC has high mechanical strength and a large energy gap in electronic band structure. Nanoscale SiC, in the form of nanowires, has increased mechanical toughness and variable band gaps. Further, introduction of twin boundaries into cubic SiC nanowires can result in improvement in both mechanical and electronic properties. This review presents effects of twin boundaries on properties of cubic SiC nanowires, including mechanical and electronic properties. Further, this review presents recent developments in introducing twin boundaries into cubic SiC nanowires, controllably and uncontrollably.

Yongfeng Zhang; Hanchen Huang

2012-11-01T23:59:59.000Z

247

Promise and Challenges of SiCf/SiC Composites for Fusion Energy Applications  

SciTech Connect

Silicon carbide fiber/silicon carbide matrix composites are a promising structural material for fusion energy applications. They have been specified in several recent fusion power plant design studies because of their high operating temperature (1000-1100?C) and hence high energy conversion efficiencies. Radiation resistance of the b-phase of SiC, excellent high-temperature fracture, creep, corrosion and thermal shock resistance and safety advantages arising from low induced radioactivity and afterheat are all positive attributes favoring the selection of SiCf/SiC composites. With the promise of these materials comes a number of challenges such as their thermal conductivity, radiation stability, gaseous transmutation rates, hermetic behavior and joining technology. Recent advances have been made in understanding radiation damage in SiC at the fundamental level through molecular dynamics simulations of displacement cascades. Radiation stability of composites made with the advanced fibers of Nicalon Type S and the UBE Tyranno SA, where no change in strength was observed up to 10 dpa at 800?C, in the development of materials with improved thermal conductivity, modeling of thermal conductivity, joining techniques and models for life-prediction. High transmutation rates of C and Si to form H, He, Mg, and Al continue to be a concern.

Jones, Russell H.(BATTELLE (PACIFIC NW LAB)) [BATTELLE (PACIFIC NW LAB); Giancarli, L. (CEA, Centre d'Etudes de Saclay) [CEA, Centre d'Etudes de Saclay; Hasegawa, Akira (UNKNOWN) [UNKNOWN; Katoh, Y.; Kohyama, Akira (UNIVERSITY OF TOKYO) [UNIVERSITY OF TOKYO; Riccardi, B (ENEA-CR Frascati) [ENEA-CR Frascati; Snead, Lance L.(UNKNOWN) [UNKNOWN; Weber, William J.(BATTELLE (PACIFIC NW LAB)) [BATTELLE (PACIFIC NW LAB)

2002-12-30T23:59:59.000Z

248

Infrared Spectra of Meteoritic SiC Grains  

E-Print Network (OSTI)

We present here the first infrared spectra of meteoritic SiC grains. The mid-infrared transmission spectra of meteoritic SiC grains isolated from the Murchison meteorite were measured in the wavelength range 2.5--16.5 micron, in order to make available the optical properties of presolar SiC grains. These grains are most likely stellar condensates with an origin predominately in carbon stars. Measurements were performed on two different extractions of presolar SiC from the Murchison meteorite. The two samples show very different spectral appearance due to different grain size distributions. The spectral feature of the smaller meteoritic SiC grains is a relatively broad absorption band found between the longitudinal and transverse lattice vibration modes around 11.3 micron, supporting the current interpretation about the presence of SiC grains in carbon stars. In contrast to this, the spectral feature of the large (> 5 micron) grains has an extinction minimum around 10 micron. The obtained spectra are compared with commercially available SiC grains and the differences are discussed. This comparison shows that the crystal structure (e.g., beta-SiC versus alpha-SiC) of SiC grains plays a minor role on the optical signature of SiC grains compared to e.g. grain size.

A. C. Andersen; C. Jager; H. Mutschke; A. Braatz; C. Clement; Th. Henning; U. G. Jorgensen; U. Ott

1998-12-22T23:59:59.000Z

249

SiXtron Advanced Materials | Open Energy Information  

Open Energy Info (EERE)

SiXtron Advanced Materials SiXtron Advanced Materials Jump to: navigation, search Name SiXtron Advanced Materials Place Quebec, Canada Website http://www.sixtronadvancedmate References SiXtron Advanced Materials[1] Information About Partnership with NREL Partnership with NREL Yes Partnership Type CRADA Partnering Center within NREL National Center for Photovoltaics Partnership Year 2008 Link to project description http://www.nrel.gov/technologytransfer/news/2008/631.html LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! SiXtron Advanced Materials is a company located in Quebec, Canada. References ↑ "SiXtron Advanced Materials" Retrieved from "http://en.openei.org/w/index.php?title=SiXtron_Advanced_Materials&oldid=379175" Categories:

250

Initial assessment of environmental effects on SiC/SiC composites in helium-cooled nuclear systems  

SciTech Connect

This report summarized the information available in the literature on the chemical reactivity of SiC/SiC composites and of their components in contact with the helium coolant used in HTGR, VHTR and GFR designs. In normal operation conditions, ultra-high purity helium will have chemically controlled impurities (water, oxygen, carbon dioxide, carbon monoxide, methane, hydrogen) that will create a slightly oxidizing gas environment. Little is known from direct experiments on the reactivity of third generation (nuclear grade) SiC/SiC composites in contact with low concentrations of water or oxygen in inert gas, at high temperature. However, there is ample information about the oxidation in dry and moist air of SiC/SiC composites at high temperatures. This information is reviewed first in the next chapters. The emphasis is places on the improvement in material oxidation, thermal, and mechanical properties during three stages of development of SiC fibers and at least two stages of development of the fiber/matrix interphase. The chemical stability of SiC/SiC composites in contact with oxygen or steam at temperatures that may develop in off-normal reactor conditions supports the conclusion that most advanced composites (also known as nuclear grade SiC/SiC composites) have the chemical resistance that would allow them maintain mechanical properties at temperatures up to 1200 1300 oC in the extreme conditions of an air or water ingress accident scenario. Further research is needed to assess the long-term stability of advanced SiC/SiC composites in inert gas (helium) in presence of very low concentrations (traces) of water and oxygen at the temperatures of normal operation of helium-cooled reactors. Another aspect that needs to be investigated is the effect of fast neutron irradiation on the oxidation stability of advanced SiC/SiC composites in normal operation conditions.

Contescu, Cristian I [ORNL] ORNL

2013-09-01T23:59:59.000Z

251

Evaluate Si Layers: Cooperative Research and Development Final Report, CRADA Number CRD-07-255  

DOE Green Energy (OSTI)

Evaluate Si layers based on heteroepitaxial Si growth on RABITS textured metal substrates coated with textured buffer layers.

Teplin, C.

2013-04-01T23:59:59.000Z

252

Site selectivity in the reaction of Si(111)-(7 times 7) with Si sub 2 H sub 6  

SciTech Connect

We find that the reaction of disilane with the Si(111)-(7{times}7) surface shows strong site selectivity. The reaction involves the fission of the Si-Si bond of Si{sub 2}H{sub 6} even at low temperatures and occurs preferentially at rest-atom sites of the 7{times}7 surface. The reaction of the products of the thermal dissociation of the surface-bound SiH{sub x} groups with surface dangling-bond sites is also site selective. We propose mechanisms to explain the above observations.

Avouris, Ph.; Bozso, F. (T. J. Watson Research Center, Yorktown Heights, NY (USA))

1990-03-22T23:59:59.000Z

253

Record of Decision for the Electrical Interconnection of TransAlta Centralia Generation LLC Big Hanaford Project (DOE/EIS-0183)(10/19/01)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

for the for the Electrical Interconnection of TransAlta Centralia Generation LLC Big Hanaford Project INTRODUCTION The Bonneville Power Administration (BPA) has decided to offer contract terms for integrating power from the TransAlta Centralia Generation LLC Big Hanaford Project, a 248-megawatt (MW) gas-fired, combined-cycle combustion turbine (CCCT) power generation project (Project), into the Federal Columbia River Transmission System (FCRTS). The Project is located within an industrial area adjacent to TransAlta's existing Centralia Steam Plant in Lewis County, Washington. The West Coast is experiencing a shortfall in electric energy supply, as well as a volatile wholesale power market in which prices have reached record highs. The Project is one of

254

Auf dem Wege zu einem Disilin RSi?SiR Supersilylierte Silane, Silanide, Silylene, Disilene.  

E-Print Network (OSTI)

??Synthese, Struktur und Enthalogenierung von Monosupersilylsilanen; Disilene, Cyclosilane, tetrahedro -Silane Die als Vorstufen sperrig substituierter Disilane R*X2Si–SiX2R*, Disilene R*XSi=SiXR* und Disiline R*Si?SiR* wichtigen Monosupersilylsilane R*SiX3… (more)

Niedermayer, Wolfgang

2000-01-01T23:59:59.000Z

255

In situ X-ray diffraction study of thin film Ir/Si solid state reactions  

Science Conference Proceedings (OSTI)

The solid state reaction between a thin (30nm) Ir film and different Si substrates (p-type Si(100), n- and p-type Si(111), silicon on insulator (SOI) and polycrystalline Si) was studied using a combination of in situ X-ray diffraction (XRD), in situ ... Keywords: Ir, NiSi, Si, XRD

W. Knaepen; J. Demeulemeester; D. Deduytsche; J. L. Jordan-Sweet; A. Vantomme; R. L. Van Meirhaeghe; C. Detavernier; C. Lavoie

2010-03-01T23:59:59.000Z

256

LOW WASTE METHOD FOR PRODU TION OF RADIONU LIDES  

POTENTIAL APPLI ATIONS Nuclear Medicine & Radiopharmaceuticals Nutrition Studies Significantly reduces Environmental Genetic Research

257

NEUTRON S ATTER AMERA FOR RADIATION DETE TION  

POTENTIAL APPLI ATIONS For more information or Treaty verification & monitoring licensing opportunities Nuclear safeguards & nonproliferation

258

A OUSTI ELL LYSING FOR EFFI IENT DNA EXTRA TION  

owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security Administration. SAND # 2010-8379P TE HNOLOGY INQUIRY?

259

he Bush administra-tion has listed myriad  

E-Print Network (OSTI)

Nuclear Security Ad- ministration (NNSA), a division of the Energy Department, to scrutinize the nuclear and reduce the destructive yield of nu- clear weapons. A review of NNSA statements over the years on plutonium aging reveals a slowly evolving change in its position. In 2002, NNSA spokesman Bryan Wilkes

260

In situ toughened SiC ceramics with Al-B-C additions and oxide-coated SiC platelet/SiC composites  

SciTech Connect

This work aimed at fabrication and characterization of high toughness SiC ceramics through the applications of in situ toughening and SiC platelet reinforcement. The processing-microstructure-property relations of hot pressed SiC with Al, B, and C additions (designated as ABC-SiC) were investigated. Through a liquid phase sintering mechanism, dense SiC was obtained by hot pressing at a temperature as low as 1,700 C with 3 wt% Al, 0.6 wt% B, and 2 wt% C additions. These sintering aids also enhanced the {beta}-to-{alpha} (3C-to-4H) phase transformation, which promoted SiC grains to grow into plate-like shapes. Under optimal processing conditions, the microstructure exhibited high-aspect-ratio plate-shaped grains with a thin (< 1 nm) Al-containing amorphous grain boundary film. The mechanical properties of the toughened SiC and the composites were evaluated in comparison with a commercial Hexoloy SiC under identical test conditions. The C-curve behavior was examined using the strength-indentation load relationship and compared with that directly measured using precracked compact tension specimens. The in situ toughened ABC-SiC exhibited much improved flaw tolerance and a significantly rising R-curve behavior. A steady-state toughness in excess of 9 MPam{sup 1/2} was recorded for the ABC-SiC in comparison to a single valued toughness below 3 MPam{sup 1/2} for the Hexoloy. Toughening in the ABC-SiC was mainly attributed to grain bridging and subsequent pullout of the plate-shaped grains. The high toughness ABC-SiC exhibited a bend strength of 650 MPa with a Weibull modulus of 19; in comparison, the commercial SiC showed a bend strength of 400 MPa with a Weibull modulus of 6. Higher fracture toughness was also achieved by the reinforcement of SiC platelets, encapsulated with alumina, yttria, or silica, in a SiC matrix.

Cao, J. [Univ. of California, Berkeley, CA (United States). Dept. of Materials Science and Mineral Engineering]|[Lawrence Berkeley National Lab., CA (United States). Materials Sciences Div.

1996-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "tran si tion" 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

A 55 kW Three-Phase Inverter With Si IGBT s and SiC Schottky Diodes  

SciTech Connect

Silicon carbide (SiC) power devices are expected to have an impact on power converter efficiency, weight, volume, and reliability. Currently, only SiC Schottky diodes are commercially available at relatively low current ratings. Oak Ridge National Laboratory has collaborated with Cree and Semikron to build a Si insulated-gate bipolar transistor-SiC Schottky diode hybrid 55-kW inverter by replacing the Si p-n diodes in Semikron's automotive inverter with Cree's made-to-order higher current SiC Schottky diodes. This paper presents the developed models of these diodes for circuit simulators, shows inverter test results, and compares the results with those of a similar all-Si inverter.

Ozpineci, Burak [ORNL; Chinthavali, Madhu Sudhan [ORNL; Tolbert, Leon M [ORNL; Kashyap, Avinash S [ORNL; Mantooth, Homer A [ORNL

2006-01-01T23:59:59.000Z

262

A 55-kW Three-Phase Inverter with Si IGBTs and SiC Schottky Diodes  

SciTech Connect

Silicon carbide (SiC) power devices are expected to have an impact on power converter efficiency, weight, volume, and reliability. Currently, only SiC Schottky diodes are commercially available at relatively low current ratings. Oak Ridge National Laboratory has collaborated with Cree and Semikron to build a Si insulated-gate bipolar transistor-SiC Schottky diode hybrid 55-kW inverter by replacing the Si p-n diodes in Semikron's automotive inverter with Cree's made-to-order higher current SiC Schottky diodes. This paper presents the developed models of these diodes for circuit simulators, shows inverter test results, and compares the results with those of a similar all-Si inverter.

Tolbert, Leon M [ORNL; Ozpineci, Burak [ORNL; Chinthavali, Madhu Sudhan [ORNL; Mantooth, Homer A [ORNL; Kashyap, Avinash S [ORNL

2009-01-01T23:59:59.000Z

263

Surface studies of hydrogen etched 3C-SiC(001) on Si(001)  

Science Conference Proceedings (OSTI)

The morphology and structure of 3C-SiC(001) surfaces, grown on Si(001) and prepared via hydrogen etching, are studied using atomic force microscopy (AFM), low-energy electron diffraction (LEED), and Auger electron spectroscopy (AES). On the etched samples, flat surfaces with large terraces and atomic steps are revealed by AFM. In ultrahigh vacuum a sharp LEED pattern with an approximate (5x1) periodicity is observed. AES studies reveal a ''bulklike'' composition up to the near surface region and indicate that an overlayer consisting of a weakly bound silicon oxide monolayer is present.

Coletti, C.; Frewin, C. L.; Saddow, S. E.; Hetzel, M.; Virojanadara, C.; Starke, U. [Electrical Engineering Department, University of South Florida, Tampa, Florida 33620 (United States); Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstr. 1, D-70569 Stuttgart (Germany)

2007-08-06T23:59:59.000Z

264

Effect of Al-Si-Al and Al-Si-Si-Al Pairs in the ZSM-5 Zeolite Framework on the 27 NMR Spectra. A Combined High-Resolution 27  

E-Print Network (OSTI)

Effect of Al-Si-Al and Al-Si-Si-Al Pairs in the ZSM-5 Zeolite Framework on the 27 Al NMR Spectra. A Combined High-Resolution 27 Al NMR and DFT/MM Study Jiri´ Dedecek, Stepan Sklenak,*, Chengbin Li, Blanka of the presence of Al-O-Si-O-Al and Al-O-Si-O-Si-O-Al sequences in the ZSM-5 zeolite framework on the local

Sklenak, Stepan

265

Direct growth of few-layer graphene on 6H-SiC and 3C-SiC/Si via propane chemical vapor deposition  

Science Conference Proceedings (OSTI)

We propose to grow graphene on SiC by a direct carbon feeding through propane flow in a chemical vapor deposition reactor. X-ray photoemission and low energy electron diffraction show that propane allows to grow few-layer graphene (FLG) on 6H-SiC(0001). Surprisingly, FLG grown on (0001) face presents a rotational disorder similar to that observed for FLG obtained by annealing on (000-1) face. Thanks to a reduced growth temperature with respect to the classical SiC annealing method, we have also grown FLG/3C-SiC/Si(111) in a single growth sequence. This opens the way for large-scale production of graphene-based devices on silicon substrate.

Michon, A.; Vezian, S.; Portail, M. [CNRS-CRHEA, Rue Bernard Gregory, 06560 Valbonne (France); Ouerghi, A. [CNRS-LPN, Route de Nozay, 91460 Marcoussis (France); Zielinski, M.; Chassagne, T. [NOVASiC, Savoie Technolac, Arche Bat 4, BP267, 73375 Le Bourget du Lac (France)

2010-10-25T23:59:59.000Z

266

Compatibility of SiC and SiC Composites with Molten Lead  

SciTech Connect

The choice of structural material candidates to contain Lead at 1000 C are limited in number. Silicon carbide composites comprise one choice of possible containment materials. Short term screening studies (120 hours) were undertaken to study the behavior of Silicon Carbide, Silicon Nitride, elemental Silicon and various Silicon Carbide fiber composites focusing mainly on melt infiltrated composites. Isothermal experiments at 1000 C utilized graphite fixtures to contain the Lead and material specimens under a low oxygen partial pressure environment. The corrosion weight loss values (grams/cm{sup 2} Hr) obtained for each of the pure materials showed SiC (monolithic CVD or Hexoloy) to have the best materials compatibility with Lead at this temperature. Increased weight loss values were observed for pure Silicon Nitride and elemental Silicon. For the SiC fiber composite samples those prepared using a SiC matrix material performed better than Si{sub 3}N{sub 4} as a matrix material. Composites prepared using a silicon melt infiltration process showed larger corrosion weight loss values due to the solubility of silicon in lead at these temperatures. When excess silicon was removed from these composite samples the corrosion performance for these material improved. These screening studies were used to guide future long term exposure (both isothermal and non-isothermal) experiments and Silicon Carbide composite fabrication work.

H Tunison

2006-03-07T23:59:59.000Z

267

Influence of Al on the growth of NiSi2 on Si(001)  

Science Conference Proceedings (OSTI)

Thin films of different atomic ratios of nickel and aluminium were deposited on Si(001)-wafers by magnetron cosputtering. The content of deposited nickel complies to layer thickness of about 20nm. After deposition the samples were annealed between 500 ... Keywords: Aluminium, Intermetallics, Nickel, Nickel disilicide, RBS, Silicon, TEM

F. Allenstein; L. Budzinski; D. Hirsch; A. Mogilatenko; G. Beddies; R. Grötzschel; H. -J. Hinneberg

2005-12-01T23:59:59.000Z

268

Low Activation Joining of SiC/SiC Composites for Fusion Applications  

Science Conference Proceedings (OSTI)

The use of SiC composites in fusion environments may require joining of plates using reactive joining or brazing. One promising reactive joining method is the use of solid-state displacement reactions between Si and TiC to produce Ti3SiC2 + SiC. We continue to explore the processing envelope for this type of joint for the TITAN collaboration to produce the best possible joints to undergo irradiation studies in HFIR. The TITAN collaboration has designed miniature torsion joints for preparation, testing, and irradiation in HFIR. As part of that project PNNL synthesized 40 miniature torsion joints and several were tested for shear strength prior to irradiation testing in HFIR. The resulting tests indicated that joint fixture alignment problems cause joint strengths to be lower than optimal but that several joints that were well aligned had high shear strengths and promising mechanical properties. High joint strengths cause non-planar shear fracture and complicate strength analysis for these miniature torsion joints.

Henager, Charles H.; Kurtz, Richard J.; Ferraris, M.

2011-03-23T23:59:59.000Z

269

Synthesis of 4-substituted-trans-1,2-diaminocyclohexyl polyaminocarboxylate metal chelating agents for the preparation of stable radiometal antibody immunoconjugates for therapy and spect and pet imaging  

DOE Patents (OSTI)

Cyclohexyl chelating agents useful in forming antibody-metal conjugates useful for diagnostic and therapeutic purposes. New compounds and processes of forming these compounds are disclosed including 4-haloacetamido-trans-1,2-diaminocyclohexyl polyaminocarboxylate and 4-isothiocyanato-trans-1,2-diamino cyclohexane-N, N, N', N'-tetra acetic acid.

Mease, Ronnie C. (2101 B. Ulster Pl., Coram, NY 11727); Kolsky, Kathryn L. (460 Harrison Ave., Miller Pl., NY 11764); Mausner, Leonard F. (16 Seville Ln., Stony Brook, NY 11790); Srivastava, Suresh C. (8 Penelope Dr., Setauket, NY 11733)

1997-06-03T23:59:59.000Z

270

Synthesis of 4-substituted-trans-1,2-diaminocyclohexyl polyaminocarboxylate metal chelating agents for the preparation of stable radiometal antibody immunoconjugates for therapy and SPECT and PET imaging  

DOE Patents (OSTI)

Cyclohexyl chelating agents useful in forming antibody-metal conjugates which are used for diagnostic and therapeutic purposes are synthesized. New compounds and processes of forming these compounds are disclosed including 4-haloacetamido-trans-1,2-diaminocyclohexyl polyaminocarboxylate and 4-isothiocyanato-trans-1,2-diamino cyclohexane-N,N,N{prime},N{prime}-tetra acetic acid.

Mease, R.C.; Kolsky, K.L.; Mausner, L.F.; Srivastava, S.C.

1997-06-03T23:59:59.000Z

271

Epitaxial CoSi2 on MOS devices  

DOE Patents (OSTI)

An Si.sub.x N.sub.y or SiO.sub.x N.sub.y liner is formed on a MOS device. Cobalt is then deposited and reacts to form an epitaxial CoSi.sub.2 layer underneath the liner. The CoSi.sub.2 layer may be formed through a solid phase epitaxy or reactive deposition epitaxy salicide process. In addition to high quality epitaxial CoSi.sub.2 layers, the liner formed during the invention can protect device portions during etching processes used to form device contacts. The liner can act as an etch stop layer to prevent excessive removal of the shallow trench isolation, and protect against excessive loss of the CoSi.sub.2 layer.

Lim, Chong Wee (Urbana, IL); Shin, Chan Soo (Daejeon, KR); Petrov, Ivan Georgiev (Champaign, IL); Greene, Joseph E. (Champaign, IL)

2005-01-25T23:59:59.000Z

272

Ultra-high current density thin-film Si diode  

DOE Patents (OSTI)

A combination of a thin-film .mu.c-Si and a-Si:H containing diode structure characterized by an ultra-high current density that exceeds 1000 A/cm.sup.2, comprising: a substrate; a bottom metal layer disposed on the substrate; an n-layer of .mu.c-Si deposited the bottom metal layer; an i-layer of .mu.c-Si deposited on the n-layer; a buffer layer of a-Si:H deposited on the i-layer, a p-layer of .mu.c-Si deposited on the buffer layer; and a top metal layer deposited on the p-layer.

Wang; Qi (Littleton, CO)

2008-04-22T23:59:59.000Z

273

Enhanced ordinary magnetoresistance in Co/Si systems  

SciTech Connect

The enhancement of the ordinary magnetoresistance (OMR) in Si has been attempted by constructing two type of Co/Si systems; one is the sputter-deposited current perpendicular to plane-type Co/Si multilayers and the other is the sputtered-Co/anodized-porous-Si system. The Co/Si multilayers show the sharp OMR at a low field and the negative granular-type giant magnetoresistance at higher fields. At 50 K, however, only the OMR appears with the ratio of about 3.0% for an in-plane field of 10 kOe. In the Co/anodized-Si system, a very large OMR of about 60% is observed at 50 K for perpendicular field of 10 kOe.

Honda, S.; Ishikawa, T.; Takai, K.; Mitarai, Y.; Harada, H. [Electronics, Shimane University, Nishikawatsu 1060, Matsue, 690-8504 (Japan)

2004-11-15T23:59:59.000Z

274

ARR/ARIES meeting, UW, May 3-4/99 Advanced ARIES-RS Using SiC/SiC as Structural  

E-Print Network (OSTI)

ARR/ARIES meeting, UW, May 3-4/99 Advanced ARIES-RS Using SiC/SiC as Structural Material A. René Raffray ARIES Meeting May 3-4, 1999 UW, Madison, WI #12;ARR/ARIES meeting, UW, May 3-4/99 SiC/SiC Based Limiting Sets of Input Parameters - 1 x ARIES-RS - 2 x ARIES-RS · Latest SiC/SiC Property Data · Options

Raffray, A. René

275

Electrical Conductivity of 2D-SiCf/CVI-SiC  

SciTech Connect

Electrical conductivity (EC) data for several plate forms of two-dimensional, silicon carbide composite made with chemical vapor infiltration matrix and with Hi Nicalon{trademark} type S fibers (2D-SiCf/CVI-SiC) were acquired. The composite fibers were coated with pyrocarbon (PyC) of various thicknesses (50 to 310 nm) and an outer thin ({approx}60 {mu}m) SiC 'seal coat' was applied by CVD to the infiltrated plates. The EC was highly anisotropic in the transverse and in-plane directions. In-plane EC ranged from {approx}150 to 1600 S/m, increased slowly with increasing temperature, and depended primarily on the total PyC thickness. High in-plane EC-values occur because it is dominated by conduction along the numerous, continuous PyC fiber coating pathways. Transverse EC ranged from {approx}1 to 60 S/m, and increased strongly with increasing temperature up to 800 C. The transverse EC is controlled by conduction through the interconnections of the carboncoating network within and between fiber bundles, especially at moderate temperatures ({approx}300 to 700 C). Below {approx}300 C, the electrical resistance of the pure SiC seal coat becomes increasingly more important as temperatures are further lowered. Importantly, a '3-layer series' model predicts that transverse EC-values for a standard seal-coated 2DSiCf/ CVI-SiC with a monolayer PyC fiber coating of {approx}50-nm thickness will be <20 S/m for all temperatures up to 800 C, as desired for a flow channel insert in a fusion reactor blanket component.

Youngblood, Gerald E.; Thomsen, Edwin C.; Shinavski, Robert J.

2011-07-11T23:59:59.000Z

276

Steel-SiC Metal Matrix Composite Development  

SciTech Connect

The goal of this project is to develop a method for fabricating SiC-reinforced high-strength steel. We are developing a metal-matrix composite (MMC) in which SiC fibers are be embedded within a metal matrix of steel, with adequate interfacial bonding to deliver the full benefit of the tensile strength of the SiC fibers in the composite.

Smith, Don D.

2005-07-17T23:59:59.000Z

277

UNITED STATES ATOMIC ENERGY COMMISSION SAC200063~~0oooo Frank K. Pittman, Director, /Division of Waste Management and Trans-  

Office of Legacy Management (LM)

SAC200063~~0oooo SAC200063~~0oooo .- Frank K. Pittman, Director, /Division of Waste Management and Trans- portation, Headquarters CONTAMIWATRD EE-AEC-OWNED OR IEASED FACILITIES This memorandum responds to your TWX dated October 30, 1973, requesting certain information on the above subject. Unfortunately, some of the documentation necessary to answer your queries is no Longer available due to the records disposal program or the agreements pre- vailing at the time of release or transfer of the facilities. From records that are available and from discussions with personnel most familiar with the transfer operations, we have assurance that the current radiological condition of transferred property is adequate under, present standards. The following tabulations follow the format suggested in your TWX

278

West Texas geothermal resource assessment. Part II. Preliminary utilization assessment of the Trans-Pecos geothermal resource. Final report  

DOE Green Energy (OSTI)

The utilization potential of geothermal resources in Trans-Pecos, Texas was assessed. The potential for both direct use and electric power generation were examined. As with the resource assessment work, the focus was on the Hueco Tanks area in northeastern El Paso County and the Presidio Bolson area in Presidio County. Suitable users of the Hueco Tanks and Presidio Bolson resource areas were identified by matching postulated temperature characteristics of the geothermal resource to the need characteristics of existing users in each resource area. The amount of geothermal energy required and the amount of fossil fuel that geothermal energy would replace were calculated for each of the users identified as suitable. Current data indicate that temperatures in the Hueco Tanks resource area are not high enough for electric power generation, but in at least part of the Presidio Bolson resource area, they may be high enough for electric power generation.

Gilliland, M.W.; Fenner, L.B.

1980-01-01T23:59:59.000Z

279

Electron diffraction study of 1M illites with interstratified trans- and cis-vacant 2 : 1 layers  

SciTech Connect

Illites from the volcanogenic Zn-Au-Ag sulfide deposit Galkinskoe (Northern Urals) have been investigated using oblique-texture electron diffraction patterns in combination with the simulation of diffraction effects. Along with single-phase tv/cv1M illites, the structures of which are formed by statistically interstratified dioctahedral 2: 1 layers with vacant trans- or cis-octahedra, illites in the form of a mixture of two interstratified tv/cv1M phases, with the dominance of tv- or cv layers, are identified. It is shown that in the latter case the diffraction pattern can also be interpreted within the single-phase tv/cv model, provided that the tv- and cv layers are distributed with some tendency to segregate. The structural features indicating the preference of the two-phase model are analyzed.

Zhukhlistov, A. P., E-mail: anzhu@igem.ru; Vikent'ev, I. V.; Rusinova, O. V. [Russian Academy of Sciences, Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry (Russian Federation)

2012-03-15T23:59:59.000Z

280

Adsorption of TiCl[sub 4], SiH[sub 4], and HCl on Si(100): Application to TiSi[sub 2] chemical vapor deposition and Si etching  

SciTech Connect

The interactions of TiCl[sub 4], SiH[sub 4], and HCl with Si(100) have been investigated by temperature programmed desorption (TPD) with the goal of better understanding the initial stages of TiSi[sub 2] chemical vapor deposition for circuit metallization and wafer etching with HCl/H[sub 2]. Coadsorption experiments with TiCl[sub 4] and SiH[sub 4] show that under most conditions H[sub 2] and SiCl[sub 2] are the main desorption products, with Ti being left behind on the surface. HCl is a minor product. However, at sufficiently low exposures of either TiCl[sub 4] or SiH[sub 4], the desorption of SiCl[sub 2] or H[sub 2], respectively, is inhibited in favor of HCl. A kinetic model involving formation of an HCl complex at defects has been formulated which explains the results quantitatively. HCl adsorption gives rise to the principal desorption products SiCl[sub 2] and H[sub 2], with HCl as a minor product. The kinetic behavior can also be explained quantitatively with the proposed model. Implications for TiSi[sub 2] growth are discussed with reference to possible growth temperatures and source gas pressures. The mechanism for etching by HCl is further elucidated.

Mendicino, M.A.; Seebauer, E.G. (Univ. of Illinois, Urbana, IL (United States). Dept. of Chemical Engineering)

1993-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "tran si tion" 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

Electroactive complex in thermally treated Ge-Si crystals  

Science Conference Proceedings (OSTI)

It is shown by Hall measurements that quenching complexly doped Ge{sub 1-x}Si{sub x} (0 { crystals with copper.

Azhdarov, G. Kh., E-mail: zangi@physics.ab.az [Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan); Zeynalov, Z. M. [Ganja State University (Azerbaijan); Zakhrabekova, Z. M. [Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan); Kyazimova, A. I. [Ganja State University (Azerbaijan)

2010-05-15T23:59:59.000Z

282

Fabrication and Characterization of CGS/n-Si Heterojunction for ...  

Science Conference Proceedings (OSTI)

Symposium, Alloys and Compounds for Thermoelectric and Solar Cell ... and Characterization of CGS/n-Si Heterojunction for Photovoltaic Application. Author(

283

BPD Conversion in a Thin SiC Buffer Layer  

Science Conference Proceedings (OSTI)

Symposium, Advanced Materials for Power Electronics, Power Conditioning, and Power Conversion. Presentation Title, BPD Conversion in a Thin SiC Buffer ...

284

Supernova Reverse Shocks and SiC Growth  

E-Print Network (OSTI)

We present new mechanisms by which the isotopic compositions of X-type grains of presolar SiC are altered by reverse shocks in Type II supernovae. We address three epochs of reverse shocks: pressure wave from the H envelope near t = 10$^6$s; reverse shock from the presupernova wind near 10$^8-10^9$s; reverse shock from the ISM near 10$^{10}$s. Using 1-D hydrodynamics we show that the first creates a dense shell of Si and C atoms near 10$^6$s in which the SiC surely condenses. The second reverse shock causes precondensed grains to move rapidly forward through decelerated gas of different isotopic composition, during which implantation, sputtering and further condensation occur simultaneously. The third reverse shock causes only further ion implantation and sputtering, which may affect trace element isotopic compositions. Using a 25M$_{\\odot}$ supernova model we propose solutions to the following unsolved questions: where does SiC condense?; why does SiC condense in preference to graphite?; why is condensed SiC $^{28}$Si-rich?; why is O richness no obstacle to SiC condensation?; how many atoms of each isotope are impacted by a grain that condenses at time t$_0$ at radial coordinate r$_0$? These many considerations are put forward as a road map for interpreting SiC X grains found in meteorites and their meaning for supernova physics.

E. A. -N. Deneault; D. D. Clayton; A. Heger

2003-02-06T23:59:59.000Z

285

Supernova Reverse Shocks and SiC Growth  

E-Print Network (OSTI)

We present new mechanisms by which the isotopic compositions of X-type grains of presolar SiC are altered by reverse shocks in Type II supernovae. We address three epochs of reverse shocks: pressure wave from the H envelope near t = 10 6 s; reverse shock from the presupernova wind near 10 8-10 9 s; reverse shock from the ISM near 10 10 s. Using 1-D hydrodynamics we show that the first creates a dense shell of Si and C atoms near 10 6 s in which the SiC surely condenses. The second reverse shock causes precondensed grains to move rapidly forward through decelerated gas of different isotopic composition, during which implantation, sputtering and further condensation occur simultaneously. The third reverse shock causes only further ion implantation and sputtering, which may affect trace element isotopic compositions. Using a 25M ? supernova model we propose solutions to the following unsolved questions: where does SiC condense?; why does SiC condense in preference to graphite?; why is condensed SiC 28 Si-rich?; why is O richness no obstacle to SiC condensation?; how many atoms of each isotope are impacted by a grain that condenses at time t0 at radial coordinate r0? These many considerations are put forward as a road map for interpreting SiC X grains found in meteorites and their meaning for supernova physics. Subject headings: —supernova remnants —dust extinction —infrared:stars —astrochemistry 1.

Ethan A. -n. Deneault; Donald D. Clayton

2003-01-01T23:59:59.000Z

286

Mechanical Performance of Discontinuous Carbon Fiber-SiC Matrix ...  

Science Conference Proceedings (OSTI)

Presentation Title, Mechanical Performance of Discontinuous Carbon Fiber-SiC Matrix Composites for Wear Components of High-Speed Train Applications.

287

Rare Earth Modified Matrices for SiC Matrix Composites  

Science Conference Proceedings (OSTI)

Presentation Title, Rare Earth Modified Matrices for SiC Matrix Composites. Author(s), David L Poerschke, Carlos G Levi. On-Site Speaker (Planned), David L

288

Si Heterostructures for Pure UV Light Emitting Diode with Carrier ...  

Science Conference Proceedings (OSTI)

Presentation Title, Development of ZnO/MgO/p+-Si Heterostructures for Pure UV Light Emitting Diode with Carrier Blocking Layer. Author(s), Byung Oh Jung, ...

289

NIST Offers US Interpretations of Recent SI (Metric) Changes  

Science Conference Proceedings (OSTI)

... It “Americanizes” the SI to cover correct US usage of metric units, such as the accepted spelling of “meter” and “liter.” In addition, the revised guide ...

2011-10-11T23:59:59.000Z

290

NIST Offers US Interpretations of Recent SI (Metric) Changes  

Science Conference Proceedings (OSTI)

... The 2008 edition of NIST Special Publications (SP) 330, The International System of Units (SI), cover correct US usage of metric units, such as the ...

2013-04-05T23:59:59.000Z

291

Heteroepitaxial Si Thin Films Deposited on Flexible Copper ...  

Science Conference Proceedings (OSTI)

Presentation Title, Heteroepitaxial Si Thin Films Deposited on Flexible Copper Substrates for Solar Photovoltaics. Author(s), Daniela Florentina Bogorin, Lee ...

292

High-Temperature Characterization of SiCN Ceramics for Wireless...  

NLE Websites -- All DOE Office Websites (Extended Search)

Si12B1 Si6B1 Si4B1 Si2B1 CHCH 2 Si-H N-H Toluene-H Toluene-CH 3 S-CH 3 B-H BDS 1 H NMR 6.2 6.0 5.8 5.6 CHCH 2 Chemical Shift (ppm) HT1800 Si16B1 Si12B1 x 0.1 1....

293

Inorg. Chem. 1992,31, 3879-3881 3879 Multielectron-TransferKinetics for cis-versus trans-Dioxorhenium(V)Species: Isoelectronic Modeling with  

E-Print Network (OSTI)

, further, that a semiquanti- tative reactivity analysis is possible based on comparisons to isoelectronic-(0)(OH)ReV(py) +e-( electrode) -trans-(0)(OH)Re"(py); (3) (1) (a) Ram, M. S.; Johnson, C. S.; Blackbourn, R. L.; Hupp, J. T. Inorg. Chem.1990,29,238. (b) Ram, M.S.; Jones,L. M.; Ward,H. J.; Wong, Y

294

159H.N. Tran et al. / Annals of Nuclear Energy 62 (2013) 158169 multi energy groups for solving both the static and noise equa  

E-Print Network (OSTI)

-group theory and numerical solution method for fast reactors 2.1. Static and noise equations In order to solve#12;159H.N. Tran et al. / Annals of Nuclear Energy 62 (2013) 158­169 multi energy groups has been studied within the European So dium Fast Reactor Collaborative Project (CP ESFR project

Demazière, Christophe

295

Hot electron transmission in metals using epitaxial NiSi{sub 2}/n-Si(111) interfaces  

SciTech Connect

We have investigated hot electron transmission across epitaxial metal-disilicide/n-Si(111) interfaces using ballistic electron emission microscopy (BEEM). Different crystal orientations of epitaxial NiSi{sub 2} were grown on a Si(111) substrate using molecular beam epitaxy. The presence of different interfaces of NiSi{sub 2} on Si(111) were confirmed by high resolution transmission electron microscopy. Electrical transport measurements reveal a clear rectifying Schottky interface with a barrier height of 0.69 eV. However, using BEEM, three different regions with different transmissions and Schottky barrier heights of 0.65 eV, 0.78 eV, and 0.71 eV are found. The addition of a thin Ni film on the NiSi{sub 2} layer strongly reduces the transmission in all the three regions and interestingly, almost equalizes the transmission across them.

Parui, S.; Wit, B.; Wees, B. J. van; Banerjee, T. [Physics of Nanodevices, Zernike Institute for Advanced Materials, University of Groningen (Netherlands); Bignardi, L.; Rudolf, P. [Surfaces and Thin Films, Zernike Institute for Advanced Materials, University of Groningen (Netherlands); Kooi, B. [Nanostructured Materials and Interfaces, Zernike Institute for Advanced Materials, University of Groningen (Netherlands)

2011-07-18T23:59:59.000Z

296

Ceramic Technology Project database: September 1990 summary report. [SiC, SiN, whisker-reinforced SiN, ZrO-toughened aluminas, zirconias, joints  

SciTech Connect

Data generated within the Ceramic Technology Project (CTP) represent a valuable resource for both research and industry. The CTP database was created to provide easy access to this information in electronic and hardcopy forms by using a computerized database and by issuing periodic hardcopy reports on the database contents. This report is the sixth in a series of semiannual database summaries and covers recent additions to the database, including joined brazed specimen test data. It covers 1 SiC, 34 SiN, 10 whisker-reinforced SiN, 2 zirconia-toughened aluminas, 8 zirconias, and 34 joints.

Keyes, B.L.P.

1992-06-01T23:59:59.000Z

297

Synthesis of SiC by direct reduction of SiO2 by using a methane gas  

Science Conference Proceedings (OSTI)

About this Abstract. Meeting, 2014 TMS Annual Meeting & Exhibition. Symposium , Solar Cell Silicon. Presentation Title, Synthesis of SiC by direct reduction of ...

298

THE ROTATIONAL SPECTRA OF {sup 29}SiC{sub 2} AND {sup 30}SiC{sub 2}  

SciTech Connect

The rotational spectra of {sup 29}SiC{sub 2} and {sup 30}SiC{sub 2}, two silicon isotopic species of the abundant astronomical ring {sup 28}SiC{sub 2}, have been characterized in the millimeter band between 140 and 360 GHz in a low pressure discharge through SiH{sub 4}, C{sub 2}H{sub 2}, and Ar. Precise rotational and centrifugal distortion constants have been derived for both species by fitting a standard asymmetric top Hamiltonian to 38 a-type transitions of {sup 29}SiC{sub 2} and 35 of {sup 30}SiC{sub 2}; the data sets include transitions up to K{sub a} = 8 and at least J = 16. With these new measurements in hand, the most intense radio transitions of both species either have been measured or can now be predicted to better than 1 km s{sup -1} in equivalent radial velocity up to 500 GHz, more than adequate accuracy for spectral line identifications in circumstellar shells of evolved carbon stars such as IRC+10216 where SiC{sub 2} is conspicuous. More than 10 new lines of {sup 29}SiC{sub 2} and {sup 30}SiC{sub 2} have been identified between 295 and 354 GHz in the interferometric spectral line survey of IRC+10216 with the Submillimeter Array.

Kokkin, D. L. [School of Chemistry, University of Sydney, NSW 2006 (Australia); Bruenken, S.; Young, K. H.; Patel, N. A.; Gottlieb, C. A.; Thaddeus, P.; McCarthy, M. C., E-mail: dkokkin@cfa.harvard.edu [Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138 (United States)

2011-10-01T23:59:59.000Z

299

Behavior of surface layers during the reciprocating wear of SiC-Al/Si metal matrix composites  

SciTech Connect

SiC particulate reinforced Al-Si matrix composite has been studied to determine the microscopic characteristics of surface layers including re-distribution of SiC particles during unlubricated reciprocal sliding wear at ambient temperature. Using a ball-on-block reciprocal test jig resulted in a surface mixed layer (SML) with fragmented SiC particles. The occurrence of the SML depends upon the number of sliding cycles and contact stress. The depth of the SML is also affected by the applied load and number of wear cycles.

Feng, Z.C.; Tandon, K.N. (Univ. of Manitoba, Winnipeg, Manitoba (Canada). Dept. of Mechanical and Industrial Engineering)

1995-02-15T23:59:59.000Z

300

The SiC problem: astronomical and meteoritic evidence  

E-Print Network (OSTI)

Pre-solar grains of silicon carbide found in meteorites and interpreted as having had an origin around carbon stars from their isotopic composition, have all been found to be of the beta-SiC polytype. Yet to date fits to the 11.3 microns SiC emission band of carbon stars had been obtained only for alpha-SiC grains. We present thin film infrared (IR) absorption spectra measured in a diamond anvil cell for both the alpha- and beta- polymorphs of synthetic SiC and compare the results with previously published spectra taken using the KBr matrix method. We find that our thin film spectra have positions nearly identical to those obtained previously from finely ground samples in KBr. Hence, we show that this discrepancy has arisen from inappropriate `KBr corrections' having been made to laboratory spectra of SiC particles dispersed in KBr matrices. We re-fit a sample of carbon star mid-IR spectra, using laboratory data with no KBr correction applied, and show that beta-SiC grains fit the observations, while alpha-SiC grains do not. The discrepancy between meteoritic and astronomical identifications of the SiC-type is therefore removed. This work shows that the diamond anvil cell thin film method can be used to produce mineral spectra applicable to cosmic environments without further manipulation.

A. K. Speck; A. M. Hofmeister; M. J. Barlow

1999-01-11T23:59:59.000Z

Note: This page contains sample records for the topic "tran si tion" 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

Hydrogen diffusion and chemistry during the annealing-induced generation of mobile protons in the oxide layer of Si/SiO{sub 2}/Si capacitors  

DOE Green Energy (OSTI)

In a number of recent studies the generation of mobile protons in the buried oxide of SOI materials and in thermal oxide buried underneath a poly-Si layer has been discussed. The protons are found to be stable and can be easily rearranged by applying an electric field. The details of the hydrogen reactions leading to the generation of the mobile H{sup +} are still under investigation. In a recent work a dynamic equilibrium model was presented. The forward reaction dominates above {approximately} 500 C and the resulting H{sup +} is mobile and entrapped inside the SiO{sub 2}. The electron is donated to the Si. The H{sup 0} is likely to be formed through H{sub 2} + K {Leftrightarrow} HK + H{sup 0}, where K is a cracking site. In the same work it was shown that the reactive hydrogen species enter the oxide from the device edges. Hence, the amount of the reactive species reaching the oxide by diffusion through the Si overlayer is negligible. These results seem to contradict earlier studies where it is shown that hydrogen can easily diffuse through the top Si layer under the given experimental conditions. The authors present here new details on hydrogen diffusion and chemistry during the protonation anneal that may offer an explanation for the hydrogen diffusion paradox. The new findings suggest that reactions at the ambient/SiO{sub 2} interface play a key role.

Vanhuesden, K. [Air Force Research Lab., Kirtland AFB, NM (United States). Space Electronics and Protection Branch; Devine, R.A.B. [France Telecom/CNET, Meylan (France); Fleetwood, D.M.; Warren, W.L. [Sandia National Labs., Albuquerque, NM (United States)

1998-09-01T23:59:59.000Z

302

Application of the kinetics of Si and SiF in specific electronic states to an investigation of the pumping of a population inversion in the molecule, SiF  

SciTech Connect

The feasibility of constructing a chemical laser operating in the pulsed mode on the tranistion SiF (a/sup 4/..sigma -->..A/sup 2/..sigma../sup +/)+h..nu.. pumped by the reaction of SiF+F/sub 2/ is investigated on the basis of absolute kinetic data for Si and SiF and determined by (a) both time-resolved atomic and molecular absorption spectroscopy on the three low lying states of Si and the ground state of SiF and (b) chemiluminescence of SiF(A-X), following pulsed irradiation of SiCL/sub 4/+RF+He mixtures. The kinetic behavior of SiF(X/sup 2/Pi/sub r/) and SiF(A/sup 2/..sigma../sup +/) is quantitatively consistent with the rate data for atomic silicon and intra-cavity stimulated emission signals detected in these investigations are accounted for in terms of the generation of a population inversion between SiF(a/sup 4/..sigma../sup -/) and SiF(A/sup 2/..sigma../sup +/) from the reaction of Si(/sup 1/D, /sup 1/S)+F/sub 2/. Calculations of wavelengths of SiF(a-X) and SiF(a-A) emission and lifetimes are presented.

Harding, D.R.; Husain, D.

1986-08-15T23:59:59.000Z

303

Electromagnetic dissociation of relativistic {sup 28}Si by nucleon emission  

SciTech Connect

A detailed study of the electromagnetic dissociation of {sup 28}Si by nucleon emission at E{sub lab}/A = 14.6 (GeV/nucleon was carried out with {sup 28}Si beams interacting on {sup 208}Pb). {sup 120}Sn. {sup 64}C targets. The measurements apparatus consists of detectors in the target area which measure the energy and charged multiplicity, and a forward spectrometer which measures the position, momentum and energy of the reaction fragments. The exclusive electromagnetic dissociation cross sections for decay channels having multiple nucleons in the final state have been measured which enables the selection of events produced in pure electromagnetic interactions. The measured cross sections agree well with previous measurements obtained for the removal of a few nucleons as well as with measurements on total charge removal cross sections from other experiments. The dependence of the integrated cross sections on the target charge Z{sub T} and the target mass AT confirms that for higher Z targets the excitation is largely electromagnetic. Direct measurements of the excitation energy for the electromagnetic dissociation of {sup 28}Si {yields} p+{sup 27}Al and {sup 28}Si {yields} n+{sup 27}Si have been obtained through a calculation of the invariant mass in kinematically, reconstructed events. The excitation energy spectrum for all targets peak near the isovector giant dipole resonance in {sup 28}Si. These distributions are well reproduced by combining the photon spectrum calculated using the Weizsaecker-Williams approximation with the experimental data on the photonuclear {sup 28}Si({sub {gamma},p}){sup 27}Al and {sup 28}Si({sub {gamma},n}){sup 27}Si. The possibilities of observing double giant dipole resonance excitations in {sup 28}Si have been investigated with cross section measurements as well as with excitation energy reconstruction.

Sonnadara, U.J.

1992-12-01T23:59:59.000Z

304

Electromagnetic dissociation of relativistic [sup 28]Si by nucleon emission  

SciTech Connect

A detailed study of the electromagnetic dissociation of [sup 28]Si by nucleon emission at E[sub lab]/A = 14.6 (GeV/nucleon was carried out with [sup 28]Si beams interacting on [sup 208]Pb). [sup 120]Sn. [sup 64]C targets. The measurements apparatus consists of detectors in the target area which measure the energy and charged multiplicity, and a forward spectrometer which measures the position, momentum and energy of the reaction fragments. The exclusive electromagnetic dissociation cross sections for decay channels having multiple nucleons in the final state have been measured which enables the selection of events produced in pure electromagnetic interactions. The measured cross sections agree well with previous measurements obtained for the removal of a few nucleons as well as with measurements on total charge removal cross sections from other experiments. The dependence of the integrated cross sections on the target charge Z[sub T] and the target mass AT confirms that for higher Z targets the excitation is largely electromagnetic. Direct measurements of the excitation energy for the electromagnetic dissociation of [sup 28]Si [yields] p+[sup 27]Al and [sup 28]Si [yields] n+[sup 27]Si have been obtained through a calculation of the invariant mass in kinematically, reconstructed events. The excitation energy spectrum for all targets peak near the isovector giant dipole resonance in [sup 28]Si. These distributions are well reproduced by combining the photon spectrum calculated using the Weizsaecker-Williams approximation with the experimental data on the photonuclear [sup 28]Si([sub [gamma],p])[sup 27]Al and [sup 28]Si([sub [gamma],n])[sup 27]Si. The possibilities of observing double giant dipole resonance excitations in [sup 28]Si have been investigated with cross section measurements as well as with excitation energy reconstruction.

Sonnadara, U.J.

1992-12-01T23:59:59.000Z

305

Si(001):B gas-source molecular-beam epitaxy: Boron surface segregation and its effect on film growth kinetics  

E-Print Network (OSTI)

The use of disilane (Si2H6) rather than silane (SiH4) for Si 001 gas-source molecular-beam epitaxy GS

Spila, Timothy P.

306

Orientation of MgO thin films on Si(001) prepared by pulsed laser deposition  

E-Print Network (OSTI)

Pulsed laser deposition method was employed to grow MgO thin films with preferred orientation on bare Si(100) and SiO?/Si(100) substrates. The orientation of MgO thin films was systematically investigated by varying ...

Zhu, Tie-Jun

307

Three-fold diffraction symmetry in epitaxial graphene and the SiC substrate  

E-Print Network (OSTI)

Epitaxial Graphene and the SiC Substrate D.A. Siegel, 1, 2in graphene ?lms on 6H-SiC(0001) have been studied by lowgrown on the C face of SiC (which possesses azimuthal

Siegel, D A

2010-01-01T23:59:59.000Z

308

Hot Corrosion of SiC-based Ceramic Matrix Composite Materials  

Science Conference Proceedings (OSTI)

The hot corrosion performance of monolithic SiC as well as SiC-SiC composites were characterized. Coatings of C and BN on the monolithic materials were ...

309

Monodisperse SiC/vinyl ester nanocomposites: Dispersant formulation, synthesis, and characterization  

E-Print Network (OSTI)

Processing and properties of SiC/vinyl ester nanocomposites.design of experiments for SiC/vinyl ester nanocomposites.of nanocrystalline cubic SiC films. Jpn. J. Appl. Phys. 37,

Yong, Virginia; Hahn, H. Thomas

2011-01-01T23:59:59.000Z

310

Substrate engineering for monolithic integration of III-V semiconductors with Si CMOS technology  

E-Print Network (OSTI)

Ge virtual substrates, fabricated using Si1-xGex-.Ge, compositionally graded buffers, enable the epitaxial growth of device-quality GaAs on Si substrates, but monolithic integration of III-V semiconductors with Si CMOS ...

Dohrman, Carl Lawrence

2008-01-01T23:59:59.000Z

311

O8, Improved Surface Morphology of 4H-SiC Homoepitaxial Layers ...  

Science Conference Proceedings (OSTI)

L6, PECVD-SiN, Si or Si/Al2O3-Capped ED-Mode AlN/GaN Inverters · Hide details for [

312

K7, Self-Assembled GaN/AlN Nanowire Superlattices on Si toward ...  

Science Conference Proceedings (OSTI)

L6, PECVD-SiN, Si or Si/Al2O3-Capped ED-Mode AlN/GaN Inverters · Hide details for [

313

Improved Initial Performance of Si Nanoparticles by Surface Oxide Reduction  

NLE Websites -- All DOE Office Websites (Extended Search)

Improved Initial Performance of Si Nanoparticles by Surface Oxide Reduction Improved Initial Performance of Si Nanoparticles by Surface Oxide Reduction for Lithium-Ion Battery Application Title Improved Initial Performance of Si Nanoparticles by Surface Oxide Reduction for Lithium-Ion Battery Application Publication Type Journal Article Year of Publication 2011 Authors Xun, Shidi, Xiangyun Song, Michael E. Grass, Daniel K. Roseguo, Z. Liu, Vincent S. Battaglia, and Gao Li Journal Electrochemical Solid-State Letters Volume 14 Start Page A61 Issue 5 Pagination A61-A63 Date Published 02/2001 Keywords Electrochemistry, elemental semiconductors, etching, lithium, nanoparticles, secondary cells, silicon, thermal analysis, transmission electron microscopy, X-ray photoelectron spectra Abstract This study characterizes the native oxide layer of Si nanoparticles and evaluates its effect on their performance for Li-ion batteries. x-ray photoelectron spectroscopy and transmission electron microscopy were applied to identify the chemical state and morphology of the native oxide layer. Elemental and thermogravimetric analysis were used to estimate the oxide content for the Si samples. Hydrofluoric acid was used to reduce the oxide layer. A correlation between etching time and oxide content was established. The initial electrochemical performances indicate that the reversible capacity of etched Si nanoparticles was enhanced significantly compared with that of the as-received Si sample.

314

Reaction of Si(111) Surface with Saturated Hydrocarbon  

SciTech Connect

Reaction of Si(111) surface with saturated hydrocarbon such as methane (CH{sub 4}) and ethane (C{sub 2}H{sub 6}) was carried out in a gas source molecular beam epitaxy (GSMBE). After carbonization, structures formed on the surface were observed by in situ reflection high-energy electron diffraction (RHEED). Structures transition formed on the surface were 7x7, {delta}-7x7, 1x1, and SiC structures. In the case of CH{sub 4}, the Si surfaces were carbonized at 800 deg. C for 120 min (7.2x10{sup 4} L) with a W-filament of 2800 deg. C, and SiC layers were obtained. In the case of C{sub 2}H{sub 6}, the mixture of 7x7 and SiC structure was observed. Decomposition of hydrocarbon was characterized in quadrupole mass spectroscopy (QMS) measurements. An atomic force microscopy (AFM) image of the mixture of 7x7 and SiC shows a wandering shape. Whereas, the SiC layer shows a regular step. This result seems to be related to the different in the amount of CH{sub 3} molecules on the surface.

Suryana, Risa [Department of Physics, Faculty of Mathematics and Natural Sciences, Sebelas Maret University Jl. Ir. Sutami 36A Kentingan Surakarta 57126 (Indonesia); Nakahara, Hitoshi; Saito, Yahachi [Department of Quantum Engineering, Graduate School of Engineering, Nagoya University Furo-cho, Chikusa-ku, Nagoya 464-8603 (Japan); Ichimiya, Ayahiko [Department of Mathematical and Physical Science, Faculty of Science, Japan Women's University Mejirodai 2-8-1, Tokyo 112-8681 (Japan)

2011-12-10T23:59:59.000Z

315

In situ study of the formation of silicide phases in amorphous Co-Si mixed layers  

Science Conference Proceedings (OSTI)

We investigate Co silicide phase formation when extra Si is added within an as deposited 50nm Co film. The addition of Si is investigated for both the Co/SiO"2 and Co/Si(100) system. A series of 10 Co-Si mixed films with a Si content varying from 21 ... Keywords: Cobalt silicides, EBSD, Grain size, In situ XRD, Nucleation

C. Van Bockstael; K. De Keyser; J. Demeulemeester; A. Vantomme; R. L. Van Meirhaeghe; C. Detavernier; J. L. Jordan-Sweet; C. Lavoie

2010-03-01T23:59:59.000Z

316

Development of Continuous SiC Fiber Reinforced HfB 2  

Science Conference Proceedings (OSTI)

Symposium, Ceramic Matrix Composites. Presentation Title, Development of Continuous SiC Fiber Reinforced HfB2-SiC Composites for Aerospace Applications.

317

Magnetic Depth Profiling of Al 2 O 3 /Fe/Si Structure using NG ...  

Science Conference Proceedings (OSTI)

... Transistor (Spin-FET). MRAM. Tunnel Magnetoresistance. Hard Disk. Giant Magnetoresistance. Al 2 O 3 /Fe/Si Structure. Al 2 O 3. Fe. Si. ...

2006-08-09T23:59:59.000Z

318

The TRansUranium EXtraction (TRUEX) process: A vital tool for disposal of US defense nuclear waste  

SciTech Connect

The TRUEX (TRansUranium EXtraction) process is a generic actinide extraction/recovery process for the removal of all actinides from acidic nitrate and chloride nuclear waste solutions. Because of its high efficiency and flexibility and its compatibility with existing process facilities, TRUEX has now become a vital tool for the disposal of certain US defense nuclear waste. The development of TRUEX is closely coupled to the development of bifunctional extractants belonging to the carbamoylphosphoryl class and CMPO in particular. A brief review of the development of CMPO and its relationship to other bifunctional and monofunctional extractants is presented. The effect of TBP on CMPO, the selectivity of CMPO for actinides extracted from acidic nitrate media, the influence of diluents on CMPO behavior and 3rd phase formation, and the radiolysis/hydrolysis of CMPO and subsequent solvent cleanup will be highlighted. Application of TRUEX in the chemical pretreatment of specific nuclear waste streams and a summary of the current status of development and deployment of TRUEX is presented. 15 refs., 10 figs., 3 tabs.

Horwitz, E.P.; Schulz, W.W.

1990-01-01T23:59:59.000Z

319

Limitations of ad hoc "SKA+VLBI" configurations & the need to extend SKA to trans-continental dimensions  

E-Print Network (OSTI)

The angular resolution of the proposed Square Kilometre Array, SKA, must be extended towards the milliarcsecond scale if it is to resolve the distant starburst galaxies that are likely to dominate the radio source counts at micro and sub-microJy flux levels. This paper considers the best way of extending SKA's angular resolution towards the milliarcsecond scale. Two possible SKA-VLBI configurations have been investigated and simulated SKA and SKA-VLBI visibility data sets generated. The effects of non-uniform data weighting on the associated images are considered. The results suggest that the preferred option is for SKA to be extended to trans-continental dimensions. By retaining 50% of the array's collecting area within a region no larger than 50 km, the surface brightness sensitivity of the array at arcsec resolution is hardly compromised. In this configuration SKA's capabilities are impressive: in a single 12 hour run, between 100-1000 sources will be simultaneously detected and imaged with arcsecond, sub-arcsecond and milliarcsecond resolution.

M. A. Garrett

1999-08-31T23:59:59.000Z

320

Clinical polyomavirus BK variants with agnogene deletion are non-functional but rescued by trans-complementation  

SciTech Connect

High-level replication of polyomavirus BK (BKV) in kidney transplant recipients is associated with the emergence of BKV variants with rearranged (rr) non-coding control region (NCCR) increasing viral early gene expression and cytopathology. Cloning and sequencing revealed the presence of a BKV quasispecies which included non-functional variants when assayed in a recombinant virus assay. Here we report that the rr-NCCR of BKV variants RH-3 and RH-12, both bearing a NCCR deletion including the 5' end of the agnoprotein coding sequence, mediated early and late viral reporter gene expression in kidney cells. However, in a recombinant virus they failed to produce infectious progeny despite large T-antigen and VP1 expression and the formation of nuclear virus-like particles. Infectious progeny was generated when the agnogene was reconstructed in cis or agnoprotein provided in trans from a co-existing BKV rr-NCCR variant. We conclude that complementation can rescue non-functional BKV variants in vitro and possibly in vivo.

Myhre, Marit Renee; Olsen, Gunn-Hege [Department of Microbiology and Virology, Institute of Medical Biology, University of Tromso, Tromso (Norway); Gosert, Rainer [Transplantation Virology, Institute for Medical Microbiology, Department of Biomedicine, University of Basel, Basel (Switzerland); Hirsch, Hans H. [Transplantation Virology, Institute for Medical Microbiology, Department of Biomedicine, University of Basel, Basel (Switzerland); Infectious Diseases and Hospital Epidemiology, University Hospital Basel, Basel (Switzerland); Rinaldo, Christine Hanssen, E-mail: christine.rinaldo@unn.n [Department of Microbiology and Infection Control, University Hospital of North Norway, P.O. Box 56, N-9038 Tromso (Norway)

2010-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "tran si tion" 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

Study of intradrystalline diffusion in zeolites communication 3. Kinetics of adsorption of trans-2-butene by NaA and NaMgA zeolites  

Science Conference Proceedings (OSTI)

This article studies the kinetics of adsorption of trans-2-butene by NaA zeolite with a varying crystal size, microcrystalline granulated NaA zeolite using granules of different sizes, and microcrystalline powdered Na/sub 8/Mg/sub 2/A zeolite. It is shown that the rate of adsorption is determined by the intracrystalline diffusion and that the effect of transfer in the transport pores and the final rate of dissipation of the heat of adsorption can be neglected. In adsorption of trans-2-butene by Na/sub 8/Mg/sub 2/A zeolite with a stepwise change in the pressure of the adsorbate, the kinetic curves are satisfactorily described by an internal diffusion equation for the kinetics of isothermal adsorption. The kinetics of adsorption were studied at 303 degrees K from the one-component vapor phase on a vacuum adsorption setup using quartz spring balance.

Broddak, R.; Dubinin, M.M.; Falko, L.A.; Gorlov, V.A.; Kuhlmann, B.; Scholner, E.; Voloshchuk, A.M.

1985-09-10T23:59:59.000Z

322

SiC/SiC Composite for an Advanced Fusion Power Plant Blanket A. R. Raffray', L. El-Guebaly', D. K. Sze3,M. Billone3, I. Sviatoslavsky', E. Mogahed', F. Najmabadi',  

E-Print Network (OSTI)

SiC/SiC Composite for an Advanced Fusion Power Plant Blanket A. R. Raffray', L. El-Guebaly', D. K of an exploratory study of blanket concepts based on SiC/SiC structure and LiPb breeder. An assessment, and constraints relating to the SiC/SiC properties are discussed. INTRODUCTION The use of SiC/SiC composite

Raffray, A. René

323

Advances in Conjugated Linoleic Acid Research, Volume 3Chapter 13 Lipid-Lowering Actions of trans-10, cis-12 Conjugated Linoleic Acid in Primary Cultures of Human (Pre)Adipocytes  

Science Conference Proceedings (OSTI)

Advances in Conjugated Linoleic Acid Research, Volume 3 Chapter 13 Lipid-Lowering Actions of trans-10, cis-12 Conjugated Linoleic Acid in Primary Cultures of Human (Pre)Adipocytes Health Nutrition Biochemistry eChapters Health - Nutritio

324

Fatty Acids in Health Promotion and Disease CausationChapter 26 The Opposing Effects of Dietary Omega-3 and trans Fatty Acids on Health: A Yin-Yang Effect at the Molecular Level?  

Science Conference Proceedings (OSTI)

Fatty Acids in Health Promotion and Disease Causation Chapter 26 The Opposing Effects of Dietary Omega-3 and trans Fatty Acids on Health: A Yin-Yang Effect at the Molecular Level? Health Nutrition Biochemistry eChapters Health - Nutritio

325

Sustainable Investments Capital SI Capital | Open Energy Information  

Open Energy Info (EERE)

SI Capital SI Capital Jump to: navigation, search Name Sustainable Investments Capital (SI Capital) Place Barcelona, Spain Zip 8021 Sector Renewable Energy, Services Product SI Capital is an independent financial institution set up to develop investment products and services for renewable energy and other sustainable projects. Coordinates 41.385589°, 2.168745° 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":41.385589,"lon":2.168745,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

326

Theoretical investigations of two Si-based spintronic materials  

SciTech Connect

Two Si-based spintronic materials, a Mn-Si digital ferromagnetic heterostructure ({delta}-layer of Mn doped in Si) with defects and dilutely doped Mn{sub x}Si{sub 1-x} alloy are investigated using a density-functional based approach. We model the heterostructure and alloy with a supercell of 64 atoms and examine several configurations of the Mn atoms. We find that 25% substitutional defects without vacancies in the {delta} layer diminishes half metallicity of the DFH substantially. For the alloy, the magnetic moment M ranges from 1.0-9.0 {mu}{sub B}/unit-cell depending on impurity configuration and concentration. Mn impurities introduce a narrow band of localized states near E{sub F}. These alloys are not half metals though their moments are integer. We explain the substantially different magnetic moments.

Fong, C Y; Snow, R; Shaughnessy, M; Pask, J E; Yang, L H

2007-08-03T23:59:59.000Z

327

147- Thermodynamic Study of the Al-Si-Sr System  

Science Conference Proceedings (OSTI)

125- Influence of Gas Flow Rate Ratio on the Structural Properties of a-SiC:H Prepared by ... 145- The Synergy of XRD and XRF in a Shale and Slate Analysis.

328

High Power SiC Modules for HEVs and PHEVs  

DOE Green Energy (OSTI)

With efforts to reduce the cost, size, and thermal management systems for the power electronics drivetrain in hybrid electric vehicles (HEVs) and plug-in hybrid electric vehicles (PHEVs), wide band gap semiconductors including silicon carbide (SiC) have been identified as possibly being a partial solution. Research on SiC power electronics has shown their higher efficiency compared to Si power electronics due to significantly lower conduction and switching losses. This paper focuses on the development of a high power module based on SiC JFETs and Schottky diodes. Characterization of a single device, a module developed using the same device, and finally an inverter built using the modules is presented. When tested at moderate load levels compared to the inverter rating, an efficiency of 98.2% was achieved by the initial prototype.

Chinthavali, Madhu Sudhan [ORNL; Tolbert, Leon M [ORNL; Zhang, Hui [ORNL; Han, Jung H [ORNL; Barlow, Fred D. [University of Idaho; Ozpineci, Burak [ORNL

2010-01-01T23:59:59.000Z

329

Photovoltaic nanocrystal scintillators hybridized on Si solar cells  

E-Print Network (OSTI)

Photovoltaic nanocrystal scintillators hybridized on Si solar cells for enhanced conversion on solar cells to enhance photovoltaic device parameters including spectral responsivity, open circuit@bilkent.edu.tr Abstract: We propose and demonstrate semiconductor nanocrystal based photovoltaic scintillators integrated

Demir, Hilmi Volkan

330

Random and Uniform Reactive Ion Etching Texturing of Si  

DOE Green Energy (OSTI)

The performance of a solar cell is critically dependent on absorption of incident photons and their conversion into electrical current. This report describes research efforts that have been directed toward the use of nanoscale surface texturing techniques to enhance light absorption in Si. This effort has been divided into two approaches. The first is to use plasma-etching to produce random texturization on multicrystalline Si cells for terrestrial use, since multicrystalline Si cannot be economically textured in any other way. The second approach is to use interference lithography and plasma-etching to produce gettering structures on Si cells for use in space, so that long-wavelength light can be absorbed close to the junction and make the cells more resistant to cosmic radiation damage.

Zaidi, S.H.

1999-04-01T23:59:59.000Z

331

SiGe-On-Insulator (SGOI) Technology and MOSFET Fabrication  

E-Print Network (OSTI)

In this work, we have developed two different fabrication processes for relaxed Si??xGex-on-insulator (SGOI) substrates: (1) SGOI fabrication by etch-back approach, and (2) by "smart-cut" approach utilizing ...

Cheng, Zhiyuan

332

ME EET Seminar: Conductive Polymer Matrix to Enable Si Nanomaterials...  

NLE Websites -- All DOE Office Websites (Extended Search)

Conductive Polymer Matrix to Enable Si Nanomaterials for Energy Storage Speaker(s): Gao Liu Date: February 17, 2010 - 12:00pm Location: Campus TBD For more information about this...

333

Critical National Need Idea: High-performance Si-based ...  

Science Conference Proceedings (OSTI)

... These materials can be costly, in part, because of the high cost of single crystalline wafers such as SiC, GaAs, InP, Ge, CdZnTe, and GaSb, that are ...

2011-08-02T23:59:59.000Z

334

Ge-on-Si laser for silicon photonics  

E-Print Network (OSTI)

Ge-on-Si devices are explored for photonic integration. Importance of Ge in photonics has grown and through techniques developed in our group we demonstrated low density of dislocations (<1x109cm-2) and point defects Ge ...

Camacho-Aguilera, Rodolfo Ernesto

2013-01-01T23:59:59.000Z

335

High Bs-FeSiBPCu Nanocrystalline Soft Magnetic Alloys ...  

Science Conference Proceedings (OSTI)

The new FeSiBPCu nanocrystalline materials with lower materials cost due to absence of rare-metals are expected to not only contribute to energy-saving and  ...

336

Subcritical Crack Growth Processes in SiC/SiC Ceramic Matrix Composites  

Science Conference Proceedings (OSTI)

Ceramic matrix composites have the potential to operate at high-temperatures and are, therefore being considered for a variety of advanced energy technologies such as combustor liners in land based gas turbo/generators, heat exchangers and advanced fission and fusion reactors. Ceramic matrix composites exhibit a range of crack growth mechanisms driven by a range of environmental and nuclear conditions. The crack growth mechanisms include: 1) fiber relaxation by thermal (FR) and irradiation (FIR) processes, 2) fiber stress-rupture (SR), 3) interface removal (IR) by oxidation, and 4) oxidation embrittlement (OE) resulting from glass formation including effects of glass viscosity. Analysis of these crack growth processes has been accomplished with a combination experimental/modeling effort. Dynamic, high-temperature, in situ crack growth measurements have been made in variable Ar + O2 environments while a PNNL developed model has been used to extrapolate this data and to add radiation effects. In addition to the modeling effort, a map showing these mechanisms as a function of environmental parameters was developed. This mechanism map is an effective tool for identifying operating regimes and predicting behavior. The process used to develop the crack growth mechanism map was to: 1) hypothesize and experimentally verify the operative mechanisms, 2) develop an analytical model for each mechanism, and 3) define the operating regime and boundary conditions for each mechanism. A map for SiC/SiC composites has been developed for chemical and nuclear environments as a function of temperature and time.

Jones, Russell H.; Henager, Charles H.

2005-07-01T23:59:59.000Z

337

Continuous-wave laser annealing of free-standing Si/SiO{sub 2} superlattice: Modification of optical, structural, and light-emitting properties  

SciTech Connect

Raman, optical, and photoluminescence studies of a free-standing Si/SiO{sub 2} superlattice (SL) are described with emphasis on laser-induced thermal effects (laser annealing). The Si/SiO{sub 2} SL (500 repeats of 2-nm-thick Si and SiO{sub 2} layers) on a Si substrate was grown by a molecular beam deposition method and annealed at 1100 deg. C for 1 h in an oven, which promoted Si nanocrystals. Then the Si substrate was partially chemically etched producing free-standing areas. Continuous-wave laser annealing ({approx}10{sup 4} W/cm{sup 2}) of the as-prepared free-standing SL strongly increases the Raman band of Si nanocrystals at {approx}515 cm{sup -1}, which features laser-induced crystallization and presumably originates from melting of Si nanostructures. The obtained results show that thermal annealing at 1100 deg. C does not finish structural reorganization of the Si/SiO{sub 2} SL material and a large proportion of Si excess can be undetectable by Raman spectroscopy in related thermally annealed materials. For the laser-crystallized samples, various material characteristics (Raman spectra, light emission, and absorption) have been measured as a function of laser-induced temperature and period of laser annealing. The light emission is found to be a straightforward function of the temperature whereas the absorption coefficient depends on the laser-annealing period suggesting additional laser-induced structural reorganization.

Khriachtchev, Leonid; Raesaenen, Markku; Novikov, Sergei [Laboratory of Physical Chemistry, University of Helsinki, P.O. Box 55, Helsinki FIN-00014 (Finland); Electron Physics Laboratory, Helsinki University of Technology, P.O. Box 3000, Helsinki FIN-02015 HUT (Finland)

2006-09-01T23:59:59.000Z

338

Magnetoresistivity in a tilted magnetic field in p-Si/SiGe/Si heterostructures with an anisotropic g-factor. Part II  

Science Conference Proceedings (OSTI)

The magnetoresistance components {rho}xx and {rho}xy are measured in two p-Si/SiGe/Si quantum wells that have an anisotropic g-factor in a tilted magnetic field as a function of the temperature, field, and tilt angle. Activation energy measurements demonstrate the existence of a ferromagnetic-paramagnetic (F-P) transition for the sample with the hole density p = 2 Multiplication-Sign 10{sup 11} cm{sup -2}. This transition is due to the crossing of the 0{up_arrow} and 1{down_arrow} Landau levels. However, in another sample with p = 7.2 Multiplication-Sign 10{sup 10} cm{sup -2}, the 0{up_arrow} and 1{down_arrow} Landau levels coincide for angles {theta} = 0-70 Degree-Sign . Only for {theta} > 70 Degree-Sign do the levels start to diverge which, in turn, results in the energy gap opening.

Drichko, I. L.; Smirnov, I. Yu., E-mail: ivan.smirnov@mail.ioffe.ru [Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation); Suslov, A. V. [National High Magnetic Field Laboratory (United States); Mironov, O. A. [University of Warwick Science Park, Warwick SEMINANO R and D Centre (United Kingdom); Leadley, D. R. [University of Warwick, Department of Physics (United Kingdom)

2012-09-15T23:59:59.000Z

339

Impurities and defects in photovoltaic Si devices: A review  

DOE Green Energy (OSTI)

The performance of commercial photovoltaic Si devices is strongly controlled by the impurities and defects present in the substrates. A well-designed solar cell processing sequence can mitigate their effects to yield high efficiency devices. Such a process-design requires a comprehensive knowledge of the properties of defects, impurities, and impurity-defect interactions that can occur during device processing. This paper reviews the recent understanding of the impurity and defect issues in Si-photovoltaics.

Sopori, B.

1999-11-04T23:59:59.000Z

340

Thermal decomposition of silane to form hydrogenated amorphous Si film  

DOE Patents (OSTI)

This invention relates to hydrogenated amorphous silicon produced by thermally decomposing silano (SiH.sub.4) or other gases comprising H and Si, at elevated temperatures of about 1700.degree.-2300.degree. C., and preferably in a vacuum of about 10.sup.-8 to 10.sup.-4 torr, to form a gaseous mixture of atomic hydrogen and atomic silicon, and depositing said gaseous mixture onto a substrate outside said source of thermal decomposition to form hydrogenated amorphous silicon.

Strongin, Myron (Center Moriches, NY); Ghosh, Arup K. (Rocky Point, NY); Wiesmann, Harold J. (Wantagh, NY); Rock, Edward B. (Oxford, GB); Lutz, III, Harry A. (Midlothian, VA)

1980-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tran si tion" 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

Developments in realistic design for aperiodic Mo/Si multilayermirrors  

Science Conference Proceedings (OSTI)

Aperiodic multilayers have been designed for various applications, using numeric algorithms and analytical solutions, for many years with varying levels of success. This work developed a more realistic model for simulating aperiodic Mo/Si multilayers to be used in these algorithms by including the formation of MoSi{sub 2}. Using a genetic computer code we were able to optimize a 45{sup o} multilayer for a large bandpass reflection multilayer that gave good agreement with the model.

Aquila, A.L.; Salmassi, F.; Dollar, F.; Liu, Y.; Gullikson, E.M.

2006-04-05T23:59:59.000Z

342

TransRapid TR-07 maglev-spectrum magnetic field effects on daily pineal indoleamine metabolic rhythms in rodents  

SciTech Connect

This study examined the effects on pineal function of magnetic field (MF) exposures (ac and dc components) similar to those produced by the TransRapid TR-07 and other electromagnetic maglev systems (EMS). Rats were entrained to a light-dark cycle and then exposed to a continuous, or to an inverted, intermittent (on = 45 s, off = 15 s, induced current = 267 G/s) simulated multifrequency ac and dc magnetic field (MF) at 1 or 7 times the TR-07 maglev vehicle MF intensity for 2 hr. Other groups of rats were exposed to only the ac or the dc-component of the maglev MF. For comparison, one group was exposed to an inverted, intermittent 60-Hz MF. Each group was compared to an unexposed group of rats for changes in pineal melatonin and serotonin-N-acetyltransferase (NAT). MF exposures at an intensity equivalent to that produced by the TR-07 vehicle had no effect on melatonin or NAT compared with sham-exposed animals under any of the conditions examined. However, 7X TR-07-level continuous 2-h MF exposures significantly depressed pineal NAT by 45%. Pineal melatonin was also depressed 33--43% by a continuous 7X TR-07 MF exposure and 28% by an intermittent 60-Hz 850-mG MF, but the results were not statically significant. This study demonstrates that intermittent, combined ac and dc MFs similar to those produced by the TR-07 EMS maglev vehicle alter the normal circadian rhythm of pineal indoleamine metabolism. The pineal regulatory enzyme NAT was more sensitive to MF exposure than melatonin and may be a more desirable measure of the biological effects of MF exposure.

Groh, K.R.

1993-01-01T23:59:59.000Z

343

TransRapid TR-07 maglev-spectrum magnetic field effects on daily pineal indoleamine metabolic rhythms in rodents  

SciTech Connect

This study examined the effects on pineal function of magnetic field (MF) exposures (ac and dc components) similar to those produced by the TransRapid TR-07 and other electromagnetic maglev systems (EMS). Rats were entrained to a light-dark cycle and then exposed to a continuous, or to an inverted, intermittent (on = 45 s, off = 15 s, induced current = 267 G/s) simulated multifrequency ac and dc magnetic field (MF) at 1 or 7 times the TR-07 maglev vehicle MF intensity for 2 hr. Other groups of rats were exposed to only the ac or the dc-component of the maglev MF. For comparison, one group was exposed to an inverted, intermittent 60-Hz MF. Each group was compared to an unexposed group of rats for changes in pineal melatonin and serotonin-N-acetyltransferase (NAT). MF exposures at an intensity equivalent to that produced by the TR-07 vehicle had no effect on melatonin or NAT compared with sham-exposed animals under any of the conditions examined. However, 7X TR-07-level continuous 2-h MF exposures significantly depressed pineal NAT by 45%. Pineal melatonin was also depressed 33--43% by a continuous 7X TR-07 MF exposure and 28% by an intermittent 60-Hz 850-mG MF, but the results were not statically significant. This study demonstrates that intermittent, combined ac and dc MFs similar to those produced by the TR-07 EMS maglev vehicle alter the normal circadian rhythm of pineal indoleamine metabolism. The pineal regulatory enzyme NAT was more sensitive to MF exposure than melatonin and may be a more desirable measure of the biological effects of MF exposure.

Groh, K.R.

1993-06-01T23:59:59.000Z

344

Characterization of trans-dioxotechnetium(V) and technetium(II)phosphine excited states and spectroelectrochemical detection of pertechnetate  

SciTech Connect

We report the first examples of excited-state luminescence from technetium complexes. We have examined a series of trans-dioxo complexes of Tc(V) and a Tc(I/II) phosphine complex and compare their respective photophysical properties with the corresponding rhenium analogues. When excited with a 415 nm laser, the Tc(V) complexes luminesce in the 700-800 nm range and have excited state lifetimes in the range of several microseconds at room temperature. The low-temperature luminescence spectra of the technetium complexes have also been investigated. Distinct vibrational band progressions are resolved in the low-temperature luminescence spectra. Excited state lifetimes at 5 K vary between tens of microseconds to several milliseconds for the dioxo-technetium complexes. In addition, a previously known Tc(I) complex, [Tc(DMPE) 3]+ which has been used as a radiography imaging agent has been demonstrated in our labs to fluoresce in the visible wavelength region upon a one-electron reversible oxidation to form the Tc(II), [Tc(DMPE)3]2+ complex in aqueous solution. The luminescence of [Tc(DMPE)3]2+ was observed by illuminating the solution complex with a 404 nm excitation while performing the reversible electrochemical experiment. In a recent application, we have focused on making thin chemically-selective films for sensing radioactive technetium compounds and in this effort have developed a fluorescence-based spectroelectrochemical sensor. Characterization of the new dioxo-technetium(V) and technetium(II)phosphine excited states as well as application of the respective chromophores for use in a spectroelectrochemical sensor for pertechnetate will be discussed.

Bryan, Samuel A.; Del Negro, Andy S.; Wang, Zheming; Hubler, Timothy L.; Heineman, William R.; Seliskar, Carl J.; Sullivan, Brian P.

2006-06-01T23:59:59.000Z

345

Surface characterization and manipulation of Si/sub 3/N/sub 4/ and SiC powders  

DOE Green Energy (OSTI)

A thorough characterization of some commercially available Si/sub 3/N/sub 4/ and SiC powders is undertaken. Physical characteristics, such as state of agglomeration, particle size, are determined by means of scanning electron microscopy and high voltage electron microscopy. High resolution electron microscopy revealed the existence of a 5 to 15 nm thick amorphous surface layer present on both types of powders. The surface layer chemical composition was determined by secondary ion mass spectrometry and x-ray photoelectron spectroscopy. For Si/sub 3/N/sub 4/, the data indicate the existence of a range of silicon oxynitrides Si/sub x/N/sub y/O/sub z/. For SiC, the 'oxide layer' has a composition very close to SiO/sub 2/. In order to eliminate the surface oxide, two chemical treatments were carried out. Both of them were effective, but the oxide layer was never completely reduced. The HF-treatments caused the formation. This work insists on the need for cleaner processing procedures, since native oxide layers are extremely difficult to eliminate and have damaging effects on either sintering kinetics or high temperature mechanical properties.

Boiteux, Y.P.

1986-12-01T23:59:59.000Z

346

Quasi-Freestanding multilayer graphene films on the carbon face of SiC  

E-Print Network (OSTI)

Films on the Carbon Face of SiC D. A. Siegel, 1, 2 C. G.on the carbon face of SiC is studied by high-resolutiongrown on the Si-face of SiC to study the impact of the

Siegel, D. A.

2010-01-01T23:59:59.000Z

347

Seamless On-Wafer Integration of Si(100) MOSFETs and GaN HEMTs  

E-Print Network (OSTI)

The first on-wafer integration of Si(100) MOSFETs and AlGaN/GaN high electron mobility transistors (HEMTs) is demonstrated. To enable a fully Si-compatible process, we fabricated a novel Si(100)-GaN-Si(100) virtual substrate ...

Piner, Edwin L.

348

Formation of clean dimers during gas-source growth of Si(001) D.R.Bowler  

E-Print Network (OSTI)

-source growth of Si(001) using hydrogen-based precursors (such as SiH 4 , silane, and Si 2 H 6 , disilane observations of the growth of Si(001) from disilane, both at room temperature following anneals 1 dimers, with the aim of explaining how these form at a comparatively low temperature. Disilane (which

Bowler, David

349

Investigation of hydrogen and chlorine at the SiO/sub 2//Si interface  

DOE Green Energy (OSTI)

Silicon oxides thermally grown in H/sub 2/O, O/sub 2/, HCl/O/sub 2/ and Cl/sub 2//O/sub 2/ ambients were analyzed, via /sup 1/H(/sup 19/F,..cap alpha gamma..)/sup 16/O nuclear reaction and SIMS, for the presence of hydrogen. In addition, those oxides grown in HCl/O/sub 2/ and Cl/sub 2//O/sub 2/ ambients were analyzed with SIMS for the presence of chlorine. The SIMS data show that the hydrogen levels in these oxides were below the limit of detection for nuclear reaction experiments. The /sup 35/Cl/sup +/ depth-profiles show that chlorine is enriched at the SiO/sub 2/ interface for the HCl/O/sub 2/ grown oxides while it is more evenly distributed in oxide bulk in the Cl/sub 2//O/sub 2/ grown samples.

Tsong, I.S.T.; Monkowski, M.D.; Monkowski, J.R.; Miller, P.D.; Moak, C.D.; Appleton, B.R.; Wintenberg, A.L.

1980-01-01T23:59:59.000Z

350

HH 9^0 Si 3S Ris-R-797(EN) "Riso-R-Wfew)  

E-Print Network (OSTI)

of subjects including wind resources, reliability and load assessment, grid connec- tion, wind-diesel systems. On Power Quality Measures for Wind-Diesel Systems: A Conceptual Framework and a Case Study 118 H.W. Bindner and P. Lundsager. Engineering Design Toob for Wind Diesel - Summary of First Release Version 125 D

351

Microsoft PowerPoint - 2013_08_20_DOE_Webinar_SiC_update.pptx  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SiC SiC f -SiC m Composite for f m BWR Channel Application Ken Yueh DOE NEET WEBINAR August 20, 2013 Research Objectives & Industry Value Objectives * Evaluate the feasibility of using SiC f -SiC Value * Stability of SiC in a reactor environment and Evaluate the feasibility of using SiC f SiC m composites as a nuclear fuel structural material - Thorough screening of design requirements against known properties Stability of SiC in a reactor environment and resistance to high temperature steam degradation offer revolutionary performance improvements - Eliminates BWR channel bow and requirements against known properties of SiC - Generate data/evaluate and disposition issues identified E l t t i l i t i d Eliminates BWR channel bow and improves safety system performance - High temperature steam oxidation rate a

352

Defect Structures in Semiconducting ReSi{sub 2-x} Epitaxial Thin Films  

Science Conference Proceedings (OSTI)

Narrow band gap semiconductors such as ReSi{sub 2{minus}x} (Eg {approximately} 0.12 eV) are potential materials for infrared detectors. Further, ReSi{sub 2{minus}x} is in thermodynamic equilibrium and has a very small lattice mismatch with Si offering the potential of developing ReSi{sub 2{minus}x} heterojunction devices where the detector element and the signal processing circuitry can be integrated on one Si chip. In a previous study, strong crystallographic alignment between ReSi{sub 2{minus}x} film and (001)Si substrate was observed by ion channeling. In this study, a transmission electron microscopy (TEM) study has been performed on ReSi{sub 2{minus}x} epitaxial films on (001) Si. Comparisons are made to our previous microscopy study on the defect structures in bulk single crystals of ReSi{sub 2{minus}x}.

Mahan, J.E.; Mirsa, A.; Mitchell, T.E.

1999-02-01T23:59:59.000Z

353

Epitaxial growth of Ti{sub 3}SiC{sub 2} thin films with basal planes parallel or orthogonal to the surface on {alpha}-SiC  

SciTech Connect

The growth of Ti{sub 3}SiC{sub 2} thin films were studied onto {alpha}-SiC substrates differently oriented by thermal annealing of TiAl layers deposited by magnetron sputtering. For any substrate's orientation, transmission electron microscopy coupled with x-ray diffraction showed the coherent epitaxial growth of Ti{sub 3}SiC{sub 2} films along basal planes of SiC. Specifically for the (1120) 4H-SiC, Ti{sub 3}SiC{sub 2} basal planes are found to be orthogonal to the surface. The continuous or textured nature of Ti{sub 3}SiC{sub 2} films does not depend of the SiC stacking sequence and is explained by a step-flow mechanism of growth mode. The ohmic character of the contact was confirmed by current-voltage measurements.

Drevin-Bazin, A.; Barbot, J. F.; Alkazaz, M.; Cabioch, T.; Beaufort, M. F. [Institut Pprime, UPR 3346, CNRS-Universite de Poitiers-ENSMA, Departement de Physique et Mecanique des Materiaux, SP2MI, Teleport 2, Bd M. et P. Curie, BP 30179, F-86962 Futuroscope-Chasseneuil (France)

2012-07-09T23:59:59.000Z

354

Effects of Hydrogen in the Annealing Environment on Photoluminescence from Si Nanoparticles in SiO(2)  

DOE Green Energy (OSTI)

The role of hydrogen in enhancing the photoluminescence (PL) yield observed from Si nanocrystals embedded in SiO{sub 2} has been studied. SiO{sub 2} thermal oxides and bulk fused silica samples have been implanted with Si and subsequently annealed in various ambients including hydrogen or deuterium forming gases (Ar+4%H{sub 2} or Ar+4%D{sub 2}) or pure Ar. Results are presented for annealing at temperatures between 200 and 1100 C. Depth and concentration profiles of H and D at various stages of processing have been measured using elastic recoil detection. Hydrogen or deuterium is observed in the bulk after annealing in forming gas but not after high temperature (1100 C) anneals in Ar. The presence of hydrogen dramatically increases the broad PL band centered in the near-infrared after annealing at 1100 C but has almost no effect on the PL spectral distribution. Hydrogen is found to selectively trap in the region where Si nanocrystals are formed, consistent with a model of H passivating surface states at the Si/SiO{sub 2} interface that leads to enhanced PL. The thermal stability of the trapped H and the PL yield observed after a high temperature anneal have been studied. The hydrogen concentration and PL yield are unchanged for subsequent anneals up to 400 C. However, above 400 C the PL decreases and a more complicated H chemistry is evident. Similar concentrations of H or D are trapped after annealing in H{sub 2} or D{sub 2} forming gas; however, no differences in the PL yield or spectral distribution are observed, indicating that the electronic transitions resulting in luminescence are not dependent on the mass of the hydrogen species.

Barbour, J.C.; Budai, J.D.; Hembree, D.M.; Meldrum, A.; White, C.W.; Withrow, S.P.

1999-03-23T23:59:59.000Z

355

Quantum wells on 3C-SiC/NH-SiC heterojunctions. Calculation of spontaneous polarization and electric field strength in experiments  

SciTech Connect

The results of experiments with quantum wells on 3C-SiC/4H-SiC and 3C-SiC/6H-SiC heterojunctions obtained by various methods are reconsidered. Spontaneous polarizations, field strengths, and energies of local levels in quantum wells on 3C-SiC/NH-SiC heterojunctions were calculated within a unified model. The values obtained are in agreement with the results of all considered experiments. Heterojunction types are determined. Approximations for valence band offsets on heterojunctions between silicon carbide polytypes and the expression for calculating local levels in quantum wells on the 3C-SiC/NH-SiC heterojunction are presented. The spontaneous polarizations and field strengths induced by spontaneous polarization on 3C-SiC/4H-SiC and 3C-SiC/6H-SiC heterojunctions were calculated as 0.71 and 0.47 C/m{sup 2} and 0.825 and 0.55 MV/cm, respectively.

Sbruev, I. S.; Sbruev, S. B., E-mail: science@yandex.ru [Moscow Aviation Institute (Russian Federation)

2010-10-15T23:59:59.000Z

356

sup_tran.xls  

Gasoline and Diesel Fuel Update (EIA)

(Trillion Btu) 2000- 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2020 Energy Use by Mode Highway Light-Duty Vehicles 14970.8 15191.3 15547.6 16054.3 16397.0 16743.0 17049.5 17379.1 17749.7 18129.3 18485.4 18843.9 19193.1 19518.8 19800.2 20071.6 20352.6 20620.8 20874.5 21140.7 21367.4 1.8% Automobiles 8641.2 8557.7 8554.5 8628.8 8632.3 8639.0 8622.6 8629.9 8669.2 8715.0 8763.0 8824.1 8891.3 8958.2 9010.9 9065.1 9131.3 9196.1 9258.6 9330.1 9387.4 0.4% Light Trucks 6304.8 6609.0 6968.5 7400.7 7739.9 8079.1 8402.1 8724.4 9055.5 9389.2 9697.2 9994.5 10276.3 10534.9 10763.4 10980.5 11195.1 11398.3 11589.2 11783.8 11953.0 3.3% Motorcycles 24.8 24.6 24.6 24.8 24.8 24.8 24.8 24.8 24.9 25.0 25.2 25.3 25.5 25.7 25.9 26.0 26.2 26.4 26.6 26.8 27.0 0.4% Commercial Light Trucks 1/ 637.6 624.1

357

sup_tran.xls  

Gasoline and Diesel Fuel Update (EIA)

Type Type (Trillion Btu) 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 Energy Use by Mode Highway Light-Duty Vehicles 15161.1 15575.7 15906.8 16472.8 16956.1 17383.6 17761.0 18145.3 18523.6 18909.9 19286.4 19680.7 20088.4 Automobiles 8876.0 8832.9 8766.0 8824.8 8847.8 8851.9 8868.7 8891.4 8906.8 8939.0 8971.8 9011.9 9058.7 Light Trucks 6259.5 6717.3 7115.4 7622.5 8082.6 8506.0 8866.5 9228.1 9591.0 9945.0 10288.6 10642.6 11003.3 Motorcycles 25.6 25.5 25.4 25.6 25.7 25.7 25.8 25.8 25.9 26.0 26.0 26.2 26.3 Commercial Light Trucks 1/ 583.8 586.5 584.4 605.0 624.7 637.7 648.0 658.6 670.4 683.6 696.8 709.8 724.5 Buses 251.1 238.9 239.8 242.3 244.6 246.6 248.7 250.7 252.8 254.8 256.6 258.2 259.4 Transit 98.9 94.1 94.5 95.5 96.4 97.2 98.0 98.8 99.6 100.4 101.1 101.7 102.2 Intercity 36.6 34.7 34.8 35.2 35.5 35.8 36.1 36.4 36.7

358

2013_trans_214_bookchapter  

Science Conference Proceedings (OSTI)

AOCS Press, Urbana, IL 61802 ©2007 by AOCS Press. All rights reserved. No part of this PDF may be repro-

359

TransWall  

Science Conference Proceedings (OSTI)

Nowadays, imagining modern buildings without glass is difficult, and glass walls can be found almost everywhere around us. Glass has been one of the most valued materials owing to its transparency. Glass walls' transparency in modern architecture involves ...

Heejeong Heo; Seungki Kim; Hyungkun Park; Jeeyong Chung; Geehyuk Lee; Woohun Lee

2013-07-01T23:59:59.000Z

360

2013_trans_217_bookchapter  

Science Conference Proceedings (OSTI)

AOCS Press, Urbana, IL 61802 ©2007 by AOCS Press. All rights reserved. No part of this PDF may be repro-

Note: This page contains sample records for the topic "tran si tion" 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

tran.PDF  

Gasoline and Diesel Fuel Update (EIA)

(Trillion Btu) 1999- Mode and Type 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2020 Energy Use by Mode Highway Light-Duty Vehicles 14878.5 14961.0 15498.3 15969.6 16275.0 16626.7 16968.3 17312.0 17628.6 17937.7 18240.0 18513.6 18773.7 19019.2 19284.9 19561.5 19832.4 20085.3 20321.4 20547.5 20757.4 20980.6 1.7% Automobiles 7805.9 7598.9 7675.1 7710.8 7655.6 7630.2 7612.8 7599.1 7582.7 7570.5 7561.6 7553.5 7534.2 7522.2 7531.3 7540.9 7561.4 7589.1 7613.4 7642.4 7668.5 7711.0 -0.1% Light Trucks 7050.1 7340.3 7801.2 8236.7 8597.4 8974.6 9333.6 9691.1 10024.1 10345.5 10656.6 10938.3 11217.8 11475.3 11732.0 11998.9 12249.4 12474.3 12686.1 12883.2 13066.8 13247.4 3.0% Motorcycles 22.4 21.8 22.0 22.2 22.0 21.9 21.9 21.8 21.8 21.7 21.7 21.7 21.6 21.6 21.6 21.7 21.7 21.8 21.9 21.9 22.0 22.1

362

Buckeye Silicon BeSi | Open Energy Information  

Open Energy Info (EERE)

Silicon BeSi Silicon BeSi Jump to: navigation, search Name Buckeye Silicon (BeSi) Place Toledo, Ohio Product Ohio-based polysilicon startup focusing on modular production. Coordinates 46.440613°, -122.847838° 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":46.440613,"lon":-122.847838,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

363

SiEnergy Systems LLC | Open Energy Information  

Open Energy Info (EERE)

SiEnergy Systems LLC SiEnergy Systems LLC Jump to: navigation, search Name SiEnergy Systems LLC Place Quincy, Massachusetts Zip 2169 Product Harvard University spin-off commercialising solid oxide fuel cell technology first developed at Harvard's School of Engineering and Applied Sciences. Coordinates 47.237515°, -119.853309° 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":47.237515,"lon":-119.853309,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

364

SiPM Development for Astroparticle Physics Applications  

E-Print Network (OSTI)

The SiPM is a novel solid state photodetector which can be operated in the single photon counting mode. It has excellent features, such as high quantum efficiency, good charge resolution, fast response, very compact size, high gain of 106, very low power consumption, immunity to the magnetic field and low bias voltage (30-70V). Drawbacks of this device currently are a large dark current, crosstalk between micropixels and relatively low sensitivity to UV and blue light. In the last few years, we have developed large size SiPMs (9 mm^2 and 25 mm^2) for applications in the imaging atmospheric Cherenkov telescopes, MAGIC and CTA, and in the space-borne fluorescence telescope EUSO. The current status of the SiPM development by MPI and MEPhI will be presented.

M. Teshima; B. Dolgoshein; R. Mirzoyan; J. Nincovic; E. Popova

2007-09-12T23:59:59.000Z

365

R and D challenges and opportunities in Si photovoltaics  

DOE Green Energy (OSTI)

The PV industry has already begun to address the use of thinner Si wafers, dropping from 400 mm toward 200 mm. Such a reduction in the wafer thickness is expected to conserve Si usage with an added advantage of higher cell efficiencies. The test production lots, fabricated with thin wafers, have verified such improvements in the device performance with a reduction in wafer thickness. However, the yield of thin cells is far lower than that of its thicker counterparts. It is expected that automation can mitigate part of this problem. However, it is necessary to investigate the basic mechanisms of wafer breakage. In particular, factors such as sawing, texturing, and warpage by the asymmetric metal patterns, which cause a propensity to breakage, need to be well understood. The final frontier of the thinner cells, the thin-film Si solar cell, is already above the horizon. The transition of this laboratory device into pilot line and then to production, is a strong challenge.

Sopori, B.

1999-10-26T23:59:59.000Z

366

Defect induced mobility enhancement: Gadolinium oxide (100) on Si(100)  

Science Conference Proceedings (OSTI)

Growth of predominantly single crystal (100)-oriented gadolinium oxide (Gd{sub 2}O{sub 3}) on a p-type Si(100) and growth of a polycrystal with a predominant Gd{sub 2}O{sub 3}(100) crystallite on a n-type Si(100) was performed using molecular beam epitaxy. Despite a poorer crystal structure than Gd{sub 2}O{sub 3}(110), an enhancement in carrier mobility can be found only from the Gd{sub 2}O{sub 3}(100)/n-type Si(100) interface. The mobility of 1715-1780 cm{sup 2}/V {center_dot} s was observed at room temperature, for carrier concentration >10{sup 20} cm{sup -3}. This accumulation of the electrons and the mobility enhancement may arise from the two-dimensional confinement due to charge transfer across the interface similar to transfer doping.

Sitaputra, W. [Department of Physics and Optical Science, University of North Carolina at Charlotte, Charlotte, North Carolina 28223 (United States); Tsu, R. [Department of Physics and Optical Science, University of North Carolina at Charlotte, Charlotte, North Carolina 28223 (United States); Department of Electrical and Computer Engineering, University of North Carolina at Charlotte, Charlotte, North Carolina 28223 (United States)

2012-11-26T23:59:59.000Z

367

SiC Processing AG | Open Energy Information  

Open Energy Info (EERE)

SiC Processing AG SiC Processing AG Jump to: navigation, search Name SiC Processing AG Place Hirschau, Germany Zip 92242 Sector Solar Product Offers management and recycling of slurry for solar and semiconductor industries. Coordinates 49.542793°, 11.943304° 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":49.542793,"lon":11.943304,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

368

Trans-Pecos Photovoltaic Concentration Experiment. Final report for Phase-I system design, 6 June 1978-28 February 1979  

DOE Green Energy (OSTI)

The Trans-Pecos Photovoltaic Concentrating Experiment is the design of a 200 kWe peak photovoltaic concentrating system applied to deep well irrigation in the Trans-Pecos region of Texas. The site selected is typical of deep well irrigation in arid regions of Texas, New Mexico, and Arizona. The existing well utilizes a 200 horse power, three phase, 480 volt induction motor to lift water 540 feet to irrigate 380 acres. The Trans-Pecos Photovoltaic Concentration (PVC) system employs a two axis (azimuth-elevation) tracking parabolic concentrator module that focuses sunlight at 38X concentration on two strings of actively cooled silicon solar cells. The direct current from a field of 102 collector modules is converted by a maximum power point electric power conditioning system to three phase alternating current. The power from the power conditioning system is connected through appropriate switchgear in parallel with the utility grid to the well's induction motor. The operational philosophy of the experiment is to displace daytime utility power with solar generated electric power. The solar system is sized to provide approximately 50 percent of the 24 hour energy demand of the motor. This requires an energy exchange with the utility since peak solar power (200 kWe) generated exceeds the peak motor demand (149.2 kWe). The annual energy production is projected to be 511 Mwh using El Paso, Texas solar TMY data. System electrical power production efficiency is projected to be 7.4 percent at the design point, and 7.0 percent on an annual electrical energy production basis. The system is projected to provide 37.8 percent of the 24 hour energy demand of the motor at the design point of March 10, excluding energy delivered to the grid in excess of motor demand. The total energy produced is projected to be 39.0 percent of the 24 hour energy demand of the motor at the design point of March 10.

Marcy, W.M.; Dudek, R.A.

1979-03-30T23:59:59.000Z

369

Effect of gaseous corrosion on the strength of SiC and Si sub 3 N sub 4  

DOE Green Energy (OSTI)

The effects of gaseous corrosion on the room-temperature flexural strength of SiC and Si{sub 3}N{sub 4} were investigated. Sintered {alpha}-SiC and hot-pressed Si{sub 3}N{sub 4} were exposed to flowing H{sub 2} or Ar at 1400{degrees}C for 10 h. The explored variables, water vapor pressure in the H{sub 2} or oxygen partial pressure in the Ar, were found to significantly affect the corrosion of these materials. Reductions in room-temperature strength were observed when weight loss resulted from active oxidation, except for the Si{sub 3}N{sub 4} exposed in Ar containing O{sub 2}. Large pits that formed during exposure were responsible for the strength reductions. When the P{sub H{sub 2}O} in H{sub 2} or P{sub O{sub 2}} in Ar was high enough to form a thin oxide layer on the sample surface, the observed strength increased, ultimately to values greater than that of the as-polished material. However, under conditions in which a much thicker oxide layer was formed, the strengths were unaffected or decreased slightly, the latter being attributed to the generation of new flaws such as bubbles or cracks in the oxide layer. 34 refs., 8 figs.

Kim, Hyoun-Ee; Moorhead, A.J.

1989-01-01T23:59:59.000Z

370

Interferente ntre Mecanica si Geometrie Constantin P. Niculescu  

E-Print Network (OSTI)

Interferen¸te între Mecanic¼a ¸si Geometrie Constantin P. Niculescu Utilizarea ideilor din Mecanic¼a¸tinând interpret¼ari în Mecanic¼a ale diferitelor enun¸turi din Geometrie ¸si invers. Bineîn¸teles, Gazeta, începând cu reintroducerea no¸tiunilor matematice legate de Mecanic¼a (vitez¼a, accelera¸tie, vector, func

Niculescu, Constantin P.

371

Overview of the SiLC R&D Activities  

E-Print Network (OSTI)

The R&D Collaboration SiLC (Silicon tracking for Linear Colliders) is based on generic R&D aiming to develop the next generation of large Silicon tracking systems for the Linear collider experiments; it serves all three ILC detector concepts. There is a strong involvement in ILD, a natural collaboration with SiD and recent 4th concept interest to use Silicon tracking technology as well. Here is a very brief summary of the latest results on sensors, Front End Electronics, Mechanics and Integration issues, test bench and test beam results and where to go from there.

Aurore Savoy-Navarro

2009-03-25T23:59:59.000Z

372

SiO2 - polyethylene reflected critical assembly  

SciTech Connect

The Planet universal critical assembly machine was used to perform a series of three critical experiments. This experiment used HEU foils reflected by polyethylene and interleaved with plates of SiO{sub 2} glass and polyethylene. Only the experiment performed using the SiO{sub 2} matrix material is evaluated in this report. The assembly was delayed critical with 33 HEU foils or 17 units (sets of HEU foils). The critical assembly has an intermediate neutron spectrum, with 51.2% of the fissions occurring between 0.625 eV and 100 keV. The calculational results show good agreement with the experimental results.

Brewer, R. W. (Roger W.); Sanchez, R. G. (Rene G.)

2001-01-01T23:59:59.000Z

373

Atom probe microscopy of three-dimensional distribution of silicon isotopes in {sup 28}Si/{sup 30}Si isotope superlattices with sub-nanometer spatial resolution  

Science Conference Proceedings (OSTI)

Laser-assisted atom probe microscopy of 2 nm period {sup 28}Si/{sup 30}Si isotope superlattices (SLs) is reported. Three-dimensional distributions of {sup 28}Si and {sup 30}Si stable isotopes are obtained with sub-nanometer spatial resolution. The depth resolution of the present atom probe analysis is much higher than that of secondary ion mass spectrometry (SIMS) even when SIMS is performed with a great care to reduce the artifact due to atomic mixing. Outlook of Si isotope SLs as ideal depth scales for SIMS and three-dimensional position standards for atom probe microscopy is discussed.

Shimizu, Yasuo; Kawamura, Yoko; Uematsu, Masashi; Itoh, Kohei M. [School of Fundamental Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522 (Japan); Tomita, Mitsuhiro [Corporate Research and Development Center, Toshiba Corporation, 8 Shinsugita-cho, Isogo-ku, Yokohama 235-8522 (Japan); Sasaki, Mikio; Uchida, Hiroshi; Takahashi, Mamoru [Toshiba Nanoanalysis Corporation, 1 Komukai Toshiba-cho, Saiwai-ku, Kawasaki 212-8583 (Japan)

2009-10-01T23:59:59.000Z

374

An ultra-thin buffer layer for Ge epitaxial layers on Si  

SciTech Connect

Using an Fe{sub 3}Si insertion layer, we study epitaxial growth of Ge layers on a Si substrate by a low-temperature molecular beam epitaxy technique. When we insert only a 10-nm-thick Fe{sub 3}Si layer in between Si and Ge, epitaxial Ge layers can be obtained on Si. The detailed structural characterizations reveal that a large lattice mismatch of {approx}4% is completely relaxed in the Fe{sub 3}Si layer. This means that the Fe{sub 3}Si layers can become ultra-thin buffer layers for Ge on Si. This method will give a way to realize a universal buffer layer for Ge, GaAs, and related devices on a Si platform.

Kawano, M.; Yamada, S.; Tanikawa, K.; Miyao, M.; Hamaya, K. [Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395 (Japan)] [Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395 (Japan); Sawano, K. [Advanced Research Laboratories, Tokyo City University, 8-15-1 Todoroki, Tokyo 158-0082 (Japan)] [Advanced Research Laboratories, Tokyo City University, 8-15-1 Todoroki, Tokyo 158-0082 (Japan)

2013-03-25T23:59:59.000Z

375

STM and LEED studies of atomically ordered terraced Si(557) surfaces  

SciTech Connect

We report results of LEED, STM, and photoemission studies of the atomic and electronic structure of atomically ordered terraced Si(hhm) surfaces. LEED and STM data demonstrate the possibility of fabricating atomically accurate terraced structures based on Si(557) with different periodicities depending on the thermal treatment procedure. Atomically resolved STM images reveal (7 x 7) terrace ordering and triple step structure. Comparative photoemission studies of the valence band and Si 2p core level electronic structure have been done on clean stepped surfaces with different terrace widths (namely, Si(557), Si(556)) and flat Si(111)-(7 x 7)

Chaika, A. N., E-mail: chaika@issp.ac.ru; Bozhko, S. I.; Ionov, A. M.; Myagkov, A. N.; Abrosimov, N. V. [Russian Academy of Sciences, Institute of Solid State Physics (Russian Federation)

2007-04-15T23:59:59.000Z

376

Selective Formation of Size-Controlled Silicon Nanocrystals by Photosynthesis in SiO Nanoparticle Thin Film  

Science Conference Proceedings (OSTI)

The SiOx thin film with a thickness of about 1 mum was formed on a GaAs substrate by bar-coating with the organic solution of the SiOx nanoparticles (~40 nm). The as-formed SiOx thin film consists of the SiOx ... Keywords: ${hbox{SiO}}_{x}$ , Nanocrystal, Raman, photosynthesis, self- limiting, silicon

Changyong Chen; S. Kimura; S. Nozaki; H. Ono; K. Uchida

2006-11-01T23:59:59.000Z

377

Energy Efficient Heat Treatment for Linerless Hypereutectic Al-Si ...  

Science Conference Proceedings (OSTI)

Heat treatment standards developed by the aluminum industry over the last several decades are often not ... Vacuum HPDC of an actual hypereutectic Al-20 %Si motorcycle engine block con- ... formance and reducing oil consumption (Ref 1, 4, 6). The ... the specific cast component sections that are of research and.

378

Optical modeling of a-Si solar cells  

DOE Green Energy (OSTI)

The authors describe applications of PV Optics to analyze the behavior of a metallic back-reflector on an a-Si solar cell. The calculated results from PV Optics agree well with the measured data on solar cells. Several unexpected results obtained from these calculations are qualitatively explained.

Sopori, B.; Madjdpour, J.; Zhang, Y.; Chen, W.; Guha, S.; Yang, J.; Banerjee, A.; Hegedus, S.

1999-11-04T23:59:59.000Z

379

Structured SiN membranes as platform for cryogenic bolometers  

Science Conference Proceedings (OSTI)

Cryogenic bolometers detect radiation by measuring the temperature increase in an appropriate absorber. To achieve sufficient detector sensitivity, we place the bolometer on a SiN membrane. Thermal coupling is further decreased by patterning the membrane ... Keywords: Bolometer, Microtechnology, Silicon nitride membranes

Solveig Anders; Torsten May; Viatcheslav Zakosarenko; Michael Starkloff; Gabriel Zieger; Hans-Georg Meyer

2009-04-01T23:59:59.000Z

380

Accession No. 4. Title and Subtitle The Trans-Texas Corridor and the Texas Airport System: Opportunities and Challenges 7. Author(s)  

E-Print Network (OSTI)

Project Title: Evaluation and Integration of Texas Airports into the Trans-Texas Corridor The proposed Trans-Texas Corridor (TTC) will allow for faster and safer movement of people and goods throughout Texas, relieve congestion on existing roadways, divert hazardous materials away from urban areas, and stimulate economic growth and development along its path. However, to become fully integrated with the Texas transportation network, the TTC must also consider connections with the state’s extensive airport system. While the TTC could produce significant opportunities for commercial services and general aviation airports, many of its planners and engineers are not familiar with the special land-use and connectivity needs of airports. While the TTC offers prospects for producing significant opportunities to commercial service and general aviation airports, it also has the potential to limit their safety, operation, and expansion if planned poorly. Possible airport benefits include increased usage because of improved airport user access and indirectly because of economic development along its path. Potential challenges include infringement on approaches and approach procedures, restriction of airport growth, limited accessibility or connectivity to the TTC, and competition with land-based modes for passenger and freight movement. Integrating Texas airports into the overall multimodal

Kelsey A. Thompson; Michael S. Bomba; C. Michael Walton; Jordan E. Botticello

2003-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tran si tion" 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

Superconductivity in gallium-substituted Ba8Si46 clathrates  

E-Print Network (OSTI)

We report a joint experimental and theoretical investigation of superconductivity in Ga-substituted type-I silicon clathrates. We prepared samples of the general formula Ba8Si46-xGax, with different values of x. We show that Ba8Si40Ga6 is a bulk superconductor, with an onset at T-C approximate to 3.3 K. For x=10 and higher, no superconductivity was observed down to T=1.8 K. This represents a strong suppression of superconductivity with increasing Ga content, compared to Ba8Si46 with T-C approximate to 8 K. Suppression of superconductivity can be attributed primarily to a decrease in the density of states at the Fermi level, caused by a reduced integrity of the sp(3)-hybridized networks as well as the lowering of carrier concentration. These results are corroborated by first-principles calculations, which show that Ga substitution results in a large decrease of the electronic density of states at the Fermi level, which explains the decreased superconducting critical temperature within the BCS framework. To further characterize the superconducting state, we carried out magnetic measurements showing Ba8Si40Ga6 to be a type-II superconductor. The critical magnetic fields were measured to be H-C1 approximate to 35 Oe and H-C2 approximate to 8.5 kOe. We deduce the London penetration depth lambda approximate to 3700 A and the coherence length xi(c)approximate to 200 A. Our estimate of the electron-phonon coupling reveals that Ba8Si40Ga6 is a moderate phonon-mediated BCS superconductor.

Li, Yang; Zhang, Ruihong; Liu, Yang; Chen, Ning; Luo, Z. P.; Ma, Xingqiao; Cao, Guohui; Feng, Z. S.; Hu, Chia-Ren; Ross, Joseph H., Jr.

2007-01-01T23:59:59.000Z

382

Development of Solar Grade Silicon (SoG-Si) Feedstock by Recycling SoG-Si Wastes  

SciTech Connect

Experiment results of EM separation show that the non-metallic inclusions were successfully pushed to the boundary layer of the crucible under EM force. Larger frequency and smaller current generate smaller thickness of accumulated inclusions. More detailed EM separation experiments are undergoing to investigate the factors that affect the removal efficient of inclusions from SoG-Si

Lifeng Zhang; Anping Dong; Lucas Nana Wiredu Damoah

2013-01-24T23:59:59.000Z

383

Mechanical Properties of High Purity SiC Fiber-Reinforced CVI-SiC Matrix Composites  

SciTech Connect

Mechanical properties of silicon carbide composites reinforced with highly crystalline fibers and fabricated by the chemical vapor infiltration method were evaluated. Materials used were SiC/SiC composites reinforced with unidirectional Hi-Nicalon Type-S fibers and unidirectional Tyranno SA fibers with various fiber/matrix interphase. Also, SiC/SiC composites reinforced with plain weave Tyranno SA fibers with carbon or multilayers of silicon carbide and carbon interphase were evaluated. In-plane tensile, transthickness tensile and interlaminar shear properties were evaluated by the in-plane tensile test, the transthickness tensile test, the diametral compression test and the compression test of double-notched specimens.The elastic modulus and proportional limit stress were improved by using high purity silicon carbide fibers. The in-plane tensile properties were insensitive to carbon interphase thickness for a range of thicknesses between 30 and 230 nm. It was found that the in-plane tensile strength of composites containing multilayers of silicon carbide and carbon coating of fibers and fiber bundles was superior to that of composites with carbon alone. Transthickness tensile strength and shear strength of high purity silicon carbide composites were successfully evaluated.

Hinoki, Tatsuya; Lara-Curzio, Edgar; Snead, Lance L. [Oak Ridge National Laboratory (United States)

2003-07-15T23:59:59.000Z

384

Low Activation Joining of SiC/SiC Composites for Fusion Applications: Miniature Torsion Specimen Shear Testing  

Science Conference Proceedings (OSTI)

The use of SiC composites in fusion environments likely requires joining of plates using reactive joining or brazing. One promising reactive joining method uses solid-state displacement reactions between Si and TiC to produce Ti3SiC2 + SiC. We continue to explore the processing envelope for this joint for the TITAN collaboration in order to produce optimal joints to undergo irradiation studies in HFIR. The TITAN collaboration has designed miniature torsion joints for preparation, testing, and irradiation in HFIR. PNNL synthesized 40 miniature torsion joints and several were tested for shear strength prior to irradiation testing in HFIR. The resulting tests indicated that (1) joint fixture alignment problems cause joint strengths to be lower than optimal, (2) that non-planar torsion test failures limit the effectiveness of the miniature specimen design, and (3) that several joints that were well aligned had high shear strengths and promising mechanical properties. In summary, we now show conclusively that high joint strengths cause non-planar shear fracture and complicate strength analysis for miniature torsion specimens.

Henager, Charles H.; Kurtz, Richard J.; Ventrella, Andrea; Ferraris, Monica

2011-04-17T23:59:59.000Z

385

Research on the Hydrogen Passivation of Defects and Impurities in Si Relevant to Crystalline Si Solar Cell Materials: Final Report, 16 February 2000 -- 15 April 2003  

DOE Green Energy (OSTI)

The goal of this experimental research program is to increase the understanding, at a microscopic level, of hydrogenation processes and passivation mechanisms for crystalline-Si photovoltaics. In our experiments, vibrational spectroscopy was used to study the properties of the interstitial H2 molecule in Si and the transition-metal-hydrogen complexes in Si. The interstitial H2 molecule is formed readily in Si when hydrogen is introduced. Our studies establish that interstitial H2 in Si behaves as a nearly free rotator, solving puzzles about the behavior of this defect that have persisted since the discovery of its vibrational spectrum. The transition metals are common impurities in Si that decrease the minority-carrier lifetime and degrade the efficiencies of solar cells. Therefore, the possibility that transition-metal impurities in Si might be passivated by hydrogen has long been of interest. Our studies of transition-metal-H complexes in Si help to establish the structural and electrical properties of a family of Pt-H complexes in Si, and have made the Pt-H complexes a model system for understanding the interaction of hydrogen with transition-metal impurities in Si.

Stavola, M.

2003-09-01T23:59:59.000Z

386

SIMULTANEOUS OBSERVATIONS OF SiO AND H{sub 2}O MASERS TOWARD KNOWN STELLAR SiO MASER SOURCES  

Science Conference Proceedings (OSTI)

We carried out simultaneous observations of four maser lines, SiO v = 1, 2, {sup 29}SiO v = 0, J = 1-0, and H{sub 2}O 6{sub 16}-5{sub 23}, toward 83 known SiO maser sources without H{sub 2}O maser detections using the Korean VLBI Network single dish telescopes. Both SiO and H{sub 2}O masers were detected from 14 sources, resulting in a detection rate of 16.9%. H{sub 2}O maser emission without SiO maser emission was detected from one source. Therefore, H{sub 2}O maser emission was newly detected from 15 sources. SiO maser emission without H{sub 2}O detection was detected from 55 sources, which gives a total SiO maser detection rate of 83.1% when including sources that have both SiO and H{sub 2}O maser emission detected. SiO v = 2 maser emission was detected from nine sources without v = 1 maser detection. The SiO v = 2 maser sources without the v = 1 maser detections need to be investigated, with a large number of v = 2 only maser sources related to the development of dust shells and their evolutionary sequence from asymptotic giant branch (AGB) to post-AGB stars. The average values of the peak and integrated antenna temperature ratios of H{sub 2}O to SiO masers are 0.44 and 0.28 in the 14 sources that have both SiO and H{sub 2}O detections. Observational characteristics of several individual sources are noted and the dependence of the different maser intensity ratios on the stellar phase is discussed. In addition, the observational results of SiO and H{sub 2}O masers are discussed in IRAS two-color diagrams.

Cho, Se-Hyung; Kim, Jaeheon, E-mail: cho@kasi.re.kr, E-mail: jhkim@kasi.re.kr [Korean VLBI Network Yonsei Radio Astronomy Observatory, Yonsei University, Seongsan-ro 262, Seodaemun, Seoul 120-749 (Korea, Republic of)

2012-11-01T23:59:59.000Z

387

Structural Ordering and its Correlation to the Optoelectronic Properties of a-Si:H Films  

DOE Green Energy (OSTI)

Magnetic susceptibility was suggested theoretically to be sensitive to the overall structural order of a-Si:H and is measured precisely for various a-Si:H thin films using a new technique.

Baugh, J.; Han, D.; Kleinhammes, A.; Wang, Q.; Wu, Y.

2000-01-01T23:59:59.000Z

388

Guidelines for the Use of SI units in Technical Writing and Presentations  

Science Conference Proceedings (OSTI)

Beginning in 1975, the American Meteorological Society (AMS) adopted a strong International System of Units (SI) policy for its publications. AMS policy on SI units is explained in the Authors' Guide, published in 1983. This article serves as a ...

Donald W. Hillger; Louis F. Sokol

1987-01-01T23:59:59.000Z

389

Oxidation Behavior of Arc Melted ZrB 2 -SiC Composite  

Science Conference Proceedings (OSTI)

Conventional microstructure of ZrB2-SiC is particulate structure i.e. SiC forms a network that is interconnected in three dimensions. During the ...

390

Reactivity of Ti2AlC with SiC Fibers and Powders up to ...  

Science Conference Proceedings (OSTI)

Herein we investigated the reactivity of Ti2AlC [3ONE2] with SiC fibers [Avco Specialty Materials and Nippon Carbon Co.] and fine SiC powders [Superior ...

391

In Situ X-ray Characterization of SiC Particle-reinforced Al Alloy ...  

Science Conference Proceedings (OSTI)

In this work we studied the correlation between the tensile behavior of SiC particle-reinforced 2080 Al alloy matrix composite (2080/SiCp) and its microstructures, ...

392

The Development of C/SiC Composite Potential for High ...  

Science Conference Proceedings (OSTI)

To meet with the demand of aerospace technology for high performance C/SiC composites, we conduct our study on C/SiC through interface design and matrix ...

393

SiGe-On-Insulator (SGOI): Two Structures for CMOS Application  

E-Print Network (OSTI)

Two SiGe-on-insulator (SGOI) structures for CMOS application are presented: surface-channel strained-Si on SGOI (SSOI) and dual-channel SGOI structures. Comparisons between two structures are made from both device performance ...

Cheng, Zhiyuan

394

NIST TN 1297: Appen. D6. Uncert. units of the SI  

Science Conference Proceedings (OSTI)

... methods; simple calibration D.5 t p and the quantile t 1-? D.6 Uncertainty and units of the SI; proper use of the SI and quantity and unit symbols D.7 ...

395

Luminescence properties of Si nanocrystals fabricated by ion beam sputtering and annealing  

Science Conference Proceedings (OSTI)

During the past several decades, Si nanocrystals (NCs) have received remarkable attention in view of potential optoelectronic device applications. This paper summarizes recent progress in the study of luminescence from Si NCs, such as photoluminescence ...

Sung Kim; Dong Hee Shin; Dong Yeol Shin; Chang Oh Kim; Jae Hee Park; Seung Bum Yang; Suk-Ho Choi; Seung Jo Yoo; Jin-Gyu Kim

2012-01-01T23:59:59.000Z

396

U.S. Department of Energy Accident Resistant SiC Clad Nuclear...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SiC also has a very low chemical reactivity and doesn't react exothermically with the reactor cooling water. The radiation behavior of SiC has also been studied extensively as...

397

Ge/SiGe quantum well devices for light modulation, detection, and emission.  

E-Print Network (OSTI)

??This PhD thesis is devoted to study electro-optic properties of Gemanium/Silicon-Germanium (Ge/SiGe) multiple quantum wells (MQWs) for light modulation, detection, and emission on Si platform.… (more)

Chaisakul, Papichaya

2012-01-01T23:59:59.000Z

398

Advanced high-? dielectric stacks with polySi and metal gates: recent progress and current challenges  

Science Conference Proceedings (OSTI)

The paper reviews our recent progress and current challenges in implementing advanced gate stacks composed of high-? dielectric materials and metal gates in mainstream Si CMOS technology. In particular, we address stacks of doped polySi gate electrodes ...

E. P. Gusev; V. Narayanan; M. M. Frank

2006-07-01T23:59:59.000Z

399

Optical far-and near-field femtosecond laser ablation of Si for...  

NLE Websites -- All DOE Office Websites (Extended Search)

Optical far-and near-field femtosecond laser ablation of Si for nanoscale chemical analysis Title Optical far-and near-field femtosecond laser ablation of Si for nanoscale chemical...

400

Exploring the specificity and mechanisms of siRNA-mediated gene silencing in mammalian cells  

E-Print Network (OSTI)

Complementary short interfering RNAs (siRNAs) are routinely used to knockdown gene expression. siRNAs bind to their target sequence and guide transcript cleavage and subsequent degradation. This type of silencing is ...

Alemán, Lourdes Maria

2008-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "tran si tion" 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

Two-stage sintering inhibits abnormal grain growth during beta to alpha transformation in SiC  

E-Print Network (OSTI)

in polycrystalline SiC: I. J. Am. Ceram. Soc. , 1978, 61,in polycrystalline SiC: II. J. Am. Ceram. Soc. , 1978, 61,? transformation in polycrystalline SiC: III, the thickening

Kueck, Aaron M.

2008-01-01T23:59:59.000Z

402

Synthesis of SiC ceramics by the carbothermal reduction of mineralized wood with silica  

DOE Green Energy (OSTI)

This paper describes the synthesis of SiC by the carbothermal reduction of mineralized wood with silica in acidic condition. The biomorphic cellular SiC ceramics were prepared by controlling the amount of silica and the size of SiC nanoparticles. Up to 20wt% of SiO2 was mineralized into wood cellular structures and the hierarchical structures such as cells, lumen, and pits were mainly retained after the thermal treatment at 1400 C.

Shin, Yongsoon; Wang, Chong M.; Exarhos, Gregory J.

2005-01-06T23:59:59.000Z

403

Novel La(Fe,Si) 13 -Based Composites for Magnetic Refrigeration  

Science Conference Proceedings (OSTI)

Nanocomposite Alloy Design for High Frequency Power Conversion Applications · Novel La(Fe,Si)13-Based Composites for Magnetic Refrigeration.

404

Improved thermal stability of Ni-silicides on Si: C epitaxial layers  

Science Conference Proceedings (OSTI)

The thermal stability of Ni-silicides on tensily strained in situ P doped Si:C epitaxial layers was evaluated. The baseline Ni silicidation process was shown to be compatible with Si:C Recessed Source-Drain (RSD) stressors for NMOS strain engineering ... Keywords: Epitaxy, Ni, SiC stressors, Silicide, Thermal stability

V. Machkaoutsan; S. Mertens; M. Bauer; A. Lauwers; K. Verheyden; K. Vanormelingen; P. Verheyen; R. Loo; M. Caymax; S. Jakschik; D. Theodore; P. Absil; S. G. Thomas; E. H. A. Granneman

2007-11-01T23:59:59.000Z

405

Characteristics of Plasma-Treated Amorphous Ta-Si-C Film as a ...  

Science Conference Proceedings (OSTI)

The Cu/Ta-Si-C/Si stacked film has a failure temperature of 750°C/1 min by using Ar + H2 plasma treatment of a 5 nm-thick Ta-Si-C film, and the stacked film has ...

406

Topology of charge density and elastic properties of Ti3SiC2 polymorphs  

E-Print Network (OSTI)

1. Structure models of Ti 3 SiC 2 . ? and ? refer to the twothe Brillouin zone of Ti 3 SiC 2 . c 400 MPa a 400 MPa c 400and elastic properties of Ti 3 SiC 2 polymorphs R. Yu, X. F.

Yu, Rong; Zhang, Xiao Feng; He, Lian Long; Ye, Heng Qiang

2004-01-01T23:59:59.000Z

407

Dispersant optimization using design of experiments for SiC/vinyl ester nanocomposites  

E-Print Network (OSTI)

×, respectively. Strain 0.5 wt. % SiC with MPS and W966 #1 (didn't break) 0.5 wt. % SiC with MPS and W966 #2 neat #1 (bend test Strain 1 vol. % SiC with 1-octanol and decane

Yong, V; Hahn, H T

2005-01-01T23:59:59.000Z

408

Si-nanoclusters embedded into epitaxial rare earth oxides: Potential candidate for nonvolatile memory applications  

Science Conference Proceedings (OSTI)

Using an unconventional approach, single crystalline Si-nanoclusters (Si-NCs) with uniform size and higher density were embedded into epitaxial rare earth oxide with two-dimensional spatial arrangements at a defined distance from the substrate using ... Keywords: Epitaxial rare earth oxide, MBE, Nonvolatile memory, Si-nanocluster

Apurba Laha; E. Bugiel; A. Fissel; H. J. Osten

2008-12-01T23:59:59.000Z

409

Investigation of silicon oxide (SiOx) nanowires growth with gold/chromium catalysts  

Science Conference Proceedings (OSTI)

We report the growth of high density silicon Oxide (SiOx) nanowires at an elevated temperature. The nanowires density is enhanced by inserting a thin layer of chromium metal in gold/Si catalyst system. The SiOx nanowires were grown ... Keywords: chromium, gold, nanowires, silicon substrate, thermal annealing

Anima Johari; Vikas Rana

2010-02-01T23:59:59.000Z

410

Leakage current and dielectric breakdown behavior in annealed SiO2 aerogel films  

E-Print Network (OSTI)

Leakage current and dielectric breakdown behavior in annealed SiO2 aerogel films Moon-Ho Jo behavior in annealed SiO2 aerogel films for intermetal dielectric applications was investigated in a metal­insulator­semiconductor structure. SiO2 aerogel films with porosities of 70% exhibited Poole­Frenkel conduction both before

Jo, Moon-Ho

411

Effect of Al on the sharpness of the MgSiO3 perovskite to post-perovskite phase transition  

E-Print Network (OSTI)

Effect of Al on the sharpness of the MgSiO3 perovskite to post-perovskite phase transition S. Akber the influence of Al on the recently discovered perovskite to post-perovskite phase transition in MgSiO3. We examine three substitution mechanisms for Al in the two structures: MgSi ! AlAl; SiSiO ! AlAl5; and Si

Steinle-Neumann, Gerd

412

Axial Ge/Si nanowire heterostructure tunnel FETs  

SciTech Connect

The vapor-liquid-solid (VLS) growth of semiconductor nanowires allows doping and composition modulation along their axis and the realization of axial 1 D heterostructures. This provides additional flexibility in energy band-edge engineering along the transport direction which is difficult to attain by planar materials growth and processing techniques. We report here on the design, growth, fabrication, and characterization of asymmetric heterostructure tunnel field-effect transistors (HTFETs) based on 100% compositionally modulated Si/Ge axial NWs for high on-current operation and low ambipolar transport behavior. We discuss the optimization of band-offsets and Schottky barrier heights for high performance HTFETs and issues surrounding their experimental realization. Our HTFET devices with 10 nm PECVD SiN{sub x} gate dielectric resulted in a measured current drive exceeding 100 {mu}A/{mu}m (I/{pi}D) and 10{sup 5} I{sub on}/I{sub off} ratios.

Picraux, Sanuel T [Los Alamos National Laboratory; Daych, Shadi A [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

413

Multi-Layer Inkjet Printed Contacts to Si  

DOE Green Energy (OSTI)

Ag, Cu, and Ni metallizations were inkjet printed with near vacuum deposition quality. The approach developed can be easily extended to other conductors such as Pt, Pd, Au, etc. Thick highly conducting lines of Ag and Cu demonstrating good adhesion to glass, Si, and printed circuit board (PCB) have been printed at 100-200 deg C in air and N2 respectively. Ag grids were inkjet-printed on Si solar cells and fired through the silicon nitride AR layer at 850 deg C, resulting in 8% cells. Next generation inks, including an ink that etches silicon nitride, have now been developed. Multi-layer inkjet printing of the etching ink followed by Ag ink produced contacts under milder conditions and gave solar cells with efficiencies as high as 12%.

Curtis, C. J.; van Hest, M.; Miedaner, A.; Kaydanova, T.; Smith, L.; Ginley, D. S.

2005-11-01T23:59:59.000Z

414

Infrared Extinction by Aggregates of SiC Particles  

E-Print Network (OSTI)

Particle shape and aggregation have a strong influence on the spectral profiles of infrared phonon bands of solid dust grains. In this paper, we use a discrete dipole approximation, a cluster-of-spheres code following the Gerardy-Ausloos approach and a T-matrix method for calculating IR extinction spectra of aggregates of spherical silicon carbide (SiC) particles. We compare the results obtained with the three different methods and discuss differences in the band profiles.

Anja C. Andersen; Harald Mutschke; Thomas Posch

2005-11-11T23:59:59.000Z

415

Handbook of SiC Properties for Fuel Performance Modeling  

SciTech Connect

The SiC layer integrity in the TRISO-coated gas-reactor fuel particle is critical to the performance, allowed burn-up, and hence intrinsic efficiency of high temperature gas cooled reactors. While there has been significant developmental work on manufacturing the fuel particles, detailed understanding of what effects the complex in-service stress state combined with realistic materials property data under irradiation has on fuel particle survival is not adequately understood. This fact particularly frustrates the modeling efforts that seek to improve fuel performance through basic understanding. In this work the properties of SiC in the non-irradiated and irradiated condition are reviewed and analyzed in terms of applicability to TRISO fuel modeling. In addition to a review of literature data, new data has been generated to fill-in holes in the existing database, specifically in the high-temperature irradiation regime. Another critical piece of information, the strength of the SiC/Pyrolytic carbon interface, is measured and a formalism for its analysis presented. Finally, recommended empirical treatments of the data are suggested.

Snead, Lance Lewis [ORNL; Nozawa, Takashi [ORNL; Katoh, Yutai [ORNL; Byun, Thak Sang [ORNL; Kondo, Sosuke [ORNL; Petti, David [Idaho National Laboratory (INL)

2007-01-01T23:59:59.000Z

416

Surface nano-patterning through styrene adsorption on Si(100)  

E-Print Network (OSTI)

We present an ab initio study of the structural and electronic properties of styrene molecules adsorbed on the dimerized Si(100) surface at different coverages, ranging from the single-molecule to the full monolayer. The adsorption mechanism primarily involves the vinyl group via a [2+2] cycloaddition process that leads to the formation of covalent Si-C bonds and a local surface derelaxation, while it leaves the phenyl group almost unperturbed. The investigation of the functionalized surface as a function of the coverage (e.g. 0.5 -- 1 ML) and of the substrate reconstruction reveals two major effects. The first results from Si dimer-vinyl interaction and concerns the controlled variation of the energy bandgap of the interface. The second is associated to phenyl-phenyl interactions, which gives rise to a regular pattern of electronic wires at surface, stemming from the pi-pi coupling. These findings suggest a rationale for tailoring the surface nano-patterning of the surface, in a controlled way.

A. Calzolari; A. Ruini; M. J. Caldas; E. Molinari

2005-07-27T23:59:59.000Z

417

Age and location of volcanic centers less than or equal to 3. 0 Myr old in Arizona, New Mexico and the Trans-Pecos Area of West Texas  

DOE Green Energy (OSTI)

This map is one of a series of maps designed for hot dry rock geothermal assessment in Arizona, New Mexico, and the Trans-Pecos area of west Texas. The 3.0 m.y. cutoff age was selected because original heat has probably largely dissipated in older rocks. The location of volcanic centers is more important to geothermal resource assessment than the location of their associated volcanic rocks; however, ages have been determined for numerous flows far from their source. Therefore, the distribution of all volcanic rocks less than or equal to 3.0 m.y. old, for which there is at least one determined age, are shown. Location of the volcanic vents and rocks were taken from Luedke and Smith (1978).

Aldrich, M.J.; Laughlin, A.W.

1981-04-01T23:59:59.000Z

418

Characterization of melt-infiltrated SiC/SiC composite combustor liners using meso- and micro-NDE techniques  

Science Conference Proceedings (OSTI)

Melt-infiltrated ceramic matrix composite SiC/SiC material systems are under development for use in combustor liners for low-emission advanced gas turbines. Uncertainty in repeatability of processing methods for these large components (33--76 cm diameter), and hence possible reduced reliability for the end user. This requires that appropriate test methods, at both meso- and micro-scale, be used to ensure that the liners are acceptable for use. Nondestructive evaluation (NDE) methods, if demonstrated to reliably detect changes caused by processing, would be of significant benefit to both manufacturer and end user. This paper describes the NDE methods and their applications in detecting a process upset in a melt-infiltrated 33 cm combustor liner and how high-resolution scanning electron microscopy was used to verify the NDE data.

Ellingson, W. A.; Sun, J. G.; More, K. L.; Hines, R.

2000-01-26T23:59:59.000Z

419

Edible Oleogels: Structure and Health ImplicationsChapter 6 Candelilla Wax as an Organogelator for Vegetable Oils–An Alternative to Develop trans-free Products for the Food Industry  

Science Conference Proceedings (OSTI)

Edible Oleogels: Structure and Health Implications Chapter 6 Candelilla Wax as an Organogelator for Vegetable Oils–An Alternative to Develop trans-free Products for the Food Industry Food Science eChapters Food Science & Technology A2C008

420

Asia Silicon Qinghai Co Ltd aka Asia Si Material | Open Energy Information  

Open Energy Info (EERE)

Qinghai Co Ltd aka Asia Si Material Qinghai Co Ltd aka Asia Si Material Jump to: navigation, search Name Asia Silicon (Qinghai) Co Ltd (aka Asia Si Material) Place Xining, Qinghai Province, China Zip 810007 Product Developing a 6,000-tonne polysilicon factory in Xining, Qinghai Province, supplier to Suntech. References Asia Silicon (Qinghai) Co Ltd (aka Asia Si Material)[1] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Asia Silicon (Qinghai) Co Ltd (aka Asia Si Material) is a company located in Xining, Qinghai Province, China . References ↑ "Asia Silicon (Qinghai) Co Ltd (aka Asia Si Material)" Retrieved from "http://en.openei.org/w/index.php?title=Asia_Silicon_Qinghai_Co_Ltd_aka_Asia_Si_Material&oldid=342359"

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421

Shape transitions and island nucleation for Si/Ge molecular beam epitaxy on stripe-patterned Si (001) substrate  

Science Conference Proceedings (OSTI)

Si and Ge growth on the stripe patterned Si (001) substrates is studied using scanning tunneling microscopy. During Si buffer growth, the stripe morphology rapidly evolves from multifaceted ''U'' to ''V''-shaped forms. This involves successive transitions between different low energy (11n) side facets, where n continuously decreases from n=3 to 20. Ge growth on such stripes induces the formation of a pronounced side wall ripple structure when the Ge thickness exceeds three monolayers. This ripple structure consists of alternating (105) microfacets oriented perpendicularly to the stripes. Depending of the side wall geometry, Ge nanoislands subsequently nucleate either on the side walls or at the bottom of grooves. The latter only occurs for ''V''-shaped stripes, where the side wall ripples extend all the way from the top to the bottom of the grooves, allowing efficient downward mass transport. For multifaceted ''U'' stripes, the side wall ripples are interrupted by steeper side wall segments such that mounds and subsequently, pyramids and domes grow on the side walls instead of at the bottom of the grooves. The island shapes strongly depend on their position on the pattern topography, which also affects the critical coverage for island nucleation as well as for the transition from pyramids to domes. The mechanisms for nucleation at different positions are clarified by detailed analysis and the role of kinetic as well as energetic factors identified.

Sanduijav, B.; Chen, G.; Springholz, G. [Institut fuer Halbleiter- und Festkoerperphysik, Johannes Kepler University, A-4040 Linz (Austria); Matei, D. [Institut fuer Halbleiter- und Festkoerperphysik, Johannes Kepler University, A-4040 Linz (Austria); National Institute for Laser, Plasma and Radiation Physics, RO-077125 Bucharest (Romania)

2009-09-15T23:59:59.000Z

422

KINETICS AND VOLATILIZATION OF SiC AND SiO2: IMPLICATIONS FOR METAMORPHISM OF UNEQUILIBRATED ORDINARY CHONDRITES; R.A. Mendybaev1,3, J.R. Beckett3, L. Grossman1,2, and E.  

E-Print Network (OSTI)

KINETICS AND VOLATILIZATION OF SiC AND SiO2: IMPLICATIONS FOR METAMORPHISM OF UNEQUILIBRATED the possibility of a more direct indicator based on the observation [1, 2] that abundances of diamond and SiC of volatilization experiments to lay the groundwork necessary to understand the processes by which SiC is destroyed

Grossman, Lawrence

423

Effect of Al/Si Substitutions and Silanol Nests on the Local Geometry of Si and Al Framework Sites in Silicone-Rich Zeolites: A Combined High Resolution 27  

E-Print Network (OSTI)

Effect of Al/Si Substitutions and Silanol Nests on the Local Geometry of Si and Al Framework Sites in Silicone-Rich Zeolites: A Combined High Resolution 27 Al and 29 Si NMR and Density Functional TheoryVed: May 6, 2009; ReVised Manuscript ReceiVed: June 8, 2009 We employed 29 Si and 27 Al (3Q) magic

Sklenak, Stepan

424

SiO2 and Si etching in fluorocarbon plasmas: A detailed surface model coupled with a complete plasma and profile simulator.  

Science Conference Proceedings (OSTI)

A surface model for SiO"2 and Si etching in fluorocarbon plasmas is presented, taking into account polymer deposition. The polymer, the CF"x, and the F surface coverage is calculated, as well as the etching yields and rates. Transition from deposition ...

E. Gogolides; P. Vauvert; Y. Courtin; G. Kokkoris; R. Pelle; A. Boudouvis; G. Turban

1999-05-01T23:59:59.000Z

425

Infrared spectroscopic detection of the disilenyl (Si2H3) and d3-disilenyl (Si2D3) radicals in silane and d4-silane matrices  

E-Print Network (OSTI)

) or disilane (Si2H6) are decomposed by hot filaments or electrons generated within plasmas [9]. During intense vibrational levels of disilane, Si2H6(X1 A1g) [2158 cm�1 , 841­835 cm�1 ] [16], of the disilyl

Kaiser, Ralf I.

426

TEM Study on the Evolution of Ge Nanocrystals in Si Oxide Matrix as a Function of Ge Concentration and the Si Reduction Process  

E-Print Network (OSTI)

Growth and evolution of germanium (Ge) nanocrystals embedded into a silicon oxide (SiO?) system have been studied based on the Ge content of co-sputtered Ge-SiO? films using transmission electron microscopy (TEM) and X-ray ...

Chew, Han Guan

427

Top-emission Si-based phosphor organic light emitting diode with Au doped ultrathin n-Si film anode and bottom Al mirror  

SciTech Connect

We report a highly efficient top-emission Si-based phosphor organic light emitting diode (PhOLED) with an ultrathin polycrystalline n-Si:Au film anode and a bottom Al mirror. This anode is formed by magnetron sputtering followed by Ni induced crystallization and then Au diffusion. By optimizing the thickness of the n-Si:Au film anode, the Au diffusion temperature, and the other parameters of the PhOLED, the highest current and power efficiencies of the n-Si:Au film anode PhOLED reached 85{+-}9 cd/A and 80{+-}8 lm/W, respectively, corresponding to an external quantum efficiency of 21{+-}2% and a power conversion efficiency of 15{+-}2%, respectively, which are about 60% and 110% higher than those of the indium tin oxide anode counterpart and 70% and 50% higher than those of the bulk n{sup +}-Si:Au anode counterpart, respectively.

Li, Y. Z.; Xu, W. J.; Ran, G. Z. [State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 (China); Qin, G. G. [State Key Laboratory for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 (China); Key Lab of Semiconductor Materials, CAS, Beijing 100083 (China)

2009-07-20T23:59:59.000Z

428

Investigation of the release of Si from SiO{sub 2} during the formation of manganese/ruthenium barrier layers  

SciTech Connect

The thermodynamic and structural stability of ruthenium-manganese diffusion barriers on SiO{sub 2} is assessed. A {approx}2 nm film composed of partially oxidized manganese (MnO{sub x} where x < 1) was deposited on a 3 nm thick Ru film and the Mn-MnO{sub x}/Ru/SiO{sub 2} structure was subsequently thermally annealed. X-ray photoelectron spectroscopy and secondary ion mass spectroscopy studies suggest the release and upward diffusion of Si from the dielectric substrate as a result of manganese-silicate formation at the Ru/SiO{sub 2} interface. The migration of Si up through the Ru film results in further manganese-silicate formation upon its interaction with the Mn-MnO{sub x} deposited layer.

McCoy, A. P.; Casey, P.; Bogan, J.; Byrne, C.; Hughes, G. [School of Physical Sciences, Dublin City University, Dublin 9 (Ireland)] [School of Physical Sciences, Dublin City University, Dublin 9 (Ireland)

2013-05-20T23:59:59.000Z

429

Creep performance of candidate SiC and Si{sub 3}N{sub 4} materials for land-based, gas turbine engine components  

DOE Green Energy (OSTI)

Tensile creep-rupture of a commercial gas pressure sintered Si3N4 and a sintered SiC is examined at 1038, 1150, and 1350 C. These 2 ceramics are candidates for nozzles and combustor tiles that are to be retrofitted in land-based gas turbine engines, and there is interest in their high temperature performance over service times {ge} 10,000 h (14 months). For this long lifetime, a static tensile stress of 300 MPa at 1038/1150 C and 125 Mpa at 1350 C cannot be exceeded for Si3N4; for SiC, the corresponding numbers are 300 Mpa at 1038 C, 250 MPa at 1150 C, and 180 MPa at 1350 C. Creep-stress exponents for Si3N4 are 33, 17, and 8 for 1038, 1150, 1350 C; fatigue- stress exponents are equivalent to creep exponents, suggesting that the fatigue mechanism causing fracture is related to the creep mechanism. Little success was obtained in producing failure in SiC after several decades of time through exposure to appropriate tensile stress; if failure did not occur on loading, then the SiC specimens most often did not creep-rupture. Creep-stress exponents for the SiC were determined to be 57, 27, and 11 for 1038, 1150, and 1350 C. For SiC, the fatigue-stress exponents did not correlate as well with creep-stress exponents. Failures that occurred in the SiC were a result of slow crack growth that initiated from the surface.

Wereszczak, A.A.; Kirkland, T.P.

1996-03-01T23:59:59.000Z

430

Characterization of Si nanostructures using internal quantum efficiency measurements  

DOE Green Energy (OSTI)

Hemispherical reflectance and internal quantum efficiency measurements have been employed to evaluate the response of Si nanostructured surfaces formed by using random and periodic reactive ion etching techniques. Random RIE-textured surfaces have demonstrated solar weighted reflectance of {approx} 3% over 300--1,200-nm spectral range even without the benefit of anti-reflection films. Random RIE-texturing has been found to be applicable over large areas ({approximately} 180 cm{sup 2}) of both single and multicrystalline Si surfaces. Due to the surface contamination and plasma-induced damage, RIE-textured surfaces did not initially provide increased short circuit current as expected from the enhanced absorption. Improved processing combined with wet-chemical damage removal etches resulted in significant improvement in the short circuit current with IQEs comparable to the random, wet-chemically textured surfaces. An interesting feature of the RIE-textured surfaces was their superior performance in the near IR spectral range. The response of RIE-textured periodic surfaces can be broadly classified into three distinct regimes. One-dimensional grating structures with triangular profiles are characterized by exceptionally low, polarization-independent reflective behavior. The reflectance response of such surfaces is similar to a graded-index anti-reflection film. The IQE response from these surfaces is severely degraded in the UV-Visible spectral region due to plasma-induced surface damage. One-dimensional grating structures with rectangular profiles exhibit spectrally selective absorptive behavior with somewhat similar IQE response. The third type of grating structure combines broadband anti-reflection behavior with significant IQE enhancement in 800--1,200-nm spectral region. The hemispherical reflectance of these 2D grating structures is comparable to random RIE-textured surfaces. The IQE enhancement in the long wavelength spectral region can be attributed to increased coupling into obliquely propagating transmitted diffracted orders inside the Si substrate. Random RIE texturing techniques are expected to find widespread commercial applicability in low-cost, large-area multicrystalline Si solar cells. Grating-texturing techniques are expected to find applications in thin-film and space solar cells.

ZAIDI,SALEEM H.

2000-04-01T23:59:59.000Z

431

RECOMBINATION RATE COEFFICIENTS OF Be-LIKE Si  

SciTech Connect

Recombination of Be-like Si{sup 10+} over the 0-43 eV electron-ion energy range is measured at the CRYRING electron cooler. In addition to radiative and dielectronic recombination, the recombination spectrum also shows strong contributions from trielectronic recombination. Below 100 meV, several very strong resonances associated with a spin-flip of the excited electron dominate the spectrum and also dominate the recombination in the photoionized plasma. The resonant plasma rate coefficients corrected for the experimental field ionization are in good agreement with calculated results by Gu and with AUTOSTRUCTURE calculations. All other calculations significantly underestimate the plasma rate coefficients at low temperatures.

Orban, I.; Boehm, S.; Schuch, R. [Department of Physics, Stockholm University, 10691 Stockholm (Sweden); Loch, S. D. [Department of Physics, Auburn University, Auburn, AL 36849 (United States)

2010-10-01T23:59:59.000Z

432

Heat Transfer between Graphene and Amorphous SiO2  

E-Print Network (OSTI)

We study the heat transfer between graphene and amorphous SiO2. We include both the heat transfer from the area of real contact, and between the surfaces in the non-contact region. We consider the radiative heat transfer associated with the evanescent electromagnetic waves which exist outside of all bodies, and the heat transfer by the gas in the non-contact region. We find that the dominant contribution to the heat transfer result from the area of real contact, and the calculated value of the heat transfer coefficient is in good agreement with the value deduced from experimental data.

B. N. J. Persson; H. Ueba

2010-07-22T23:59:59.000Z

433

Antireflection and SiO2 Surface Passivation by Liquid-Phase Chemistry for Efficient Black Silicon Solar Cells: Preprint  

DOE Green Energy (OSTI)

We report solar cells with both black Si antireflection and SiO2 surface passivation provided by inexpensive liquid-phase chemistry, rather than by conventional vacuum-based techniques. Preliminary cell efficiency has reached 16.4%. Nanoporous black Si antireflection on crystalline Si by aqueous etching promises low surface reflection for high photon utilization, together with lower manufacturing cost compared to vacuum-based antireflection coating. Ag-nanoparticle-assisted black Si etching and post-etching chemical treatment recently developed at NREL enables excellent control over the pore diameter and pore separation. Performance of black Si solar cells, including open-circuit voltage, short-circuit current density, and blue response, has benefited from these improvements. Prior to this study, our black Si solar cells were all passivated by thermal SiO2 produced in tube furnaces. Although this passivation is effective, it is not yet ideal for ultra-low-cost manufacturing. In this study, we report, for the first time, the integration of black Si with a proprietary liquid-phase deposition (LPD) passivation from Natcore Technology. The Natcore LPD forms a layer of <10-nm SiO2 on top of the black Si surface in a relatively mild chemical bath at room temperature. We demonstrate black Si solar cells with LPD SiO2 with a spectrum-weighted average reflection lower than 5%, similar to the more costly thermally grown SiO2 approach. However, LPD SiO2 provides somewhat better surface-passivation quality according to the lifetime analysis by the photo-conductivity decay measurement. Moreover, black Si solar cells with LPD SiO2 passivation exhibit higher spectral response at short wavelength compared to those passivated by thermally grown SiO2. With further optimization, the combination of aqueous black Si etching and LPD could provide a pathway for low-cost, high-efficiency crystalline Si solar cells.

Yuan, H. C.; Oh, J.; Zhang, Y.; Kuznetsov, O. A.; Flood, D. J.; Branz, H. M.

2012-06-01T23:59:59.000Z

434

Light Trapping for High Efficiency Heterojunction Crystalline Si Solar Cells: Preprint  

DOE Green Energy (OSTI)

Light trapping plays an important role to achieve high short circuit current density (Jsc) and high efficiency for amorphous/crystalline Si heterojunction solar cells. Si heterojunction uses hydrogenated amorphous Si for emitter and back contact. This structure of solar cell posses highest open circuit voltage of 0.747 V at one sun for c-Si based solar cells. It also suggests that over 25% record-high efficiency is possible with further improvement of Jsc. Light trapping has two important tasks. The first one is to reduce the surface reflectance of light to zero for the solar spectrum that Si has a response. The second one is to increase the effective absorption length to capture all the photon. For Si heterojunction solar cell, surface texturing, anti-reflectance indium tin oxides (ITO) layer at the front and back are the key area to improve the light trapping.

Wang, Q.; Xu, Y.; Iwaniczko, E.; Page, M.

2011-04-01T23:59:59.000Z

435

Laser-induced fluorescence measurements and kinetic analysis of Si atom formation in a rotating disk chemical vapor deposition reactor  

SciTech Connect

An extensive set of laser-induced fluorescence (LIF) measurements of Si atoms during the chemical vapor deposition (CVD) of silicon from silane and disilane in a research rotating disk reactor are presented. The experimental results are compared in detail with predictions from a numerical model of CVD from silane and disilane that treats the fluid flow coupled to gas-phase and gas-surface chemistry. The comparisons showed that the unimolecular decomposition of SiH[sub 2] could not account for the observed gas-phase Si atom density profiles. The H[sub 3]SiSiH [leftrightarrow] Si + SiH[sub 4] and H[sub 3]SiSiH + SiH[sub 2] [leftrightarrow] Si + Si[sub 2]H[sub 6] reactions are proposed as the primary Si atom production routes. The model is in good agreement with the measured shapes of the Si atom profiles and the trends in Si atom density with susceptor temperature, pressure, and reactant gas mixture. 33 refs., 12 figs., 3 tabs.

Ho, P.; Coltrin, M.E.; Breiland, W.G. (Sandia National Lab., Albuquerque, NM (United States))

1994-10-06T23:59:59.000Z

436

Solid particle erosion behavior of an Si{sub 3}N{sub 4}-MoSi{sub 2} composite at room and elevated temperatures  

SciTech Connect

The solid particle erosion behavior at room and elevated temperatures (180, 500, 700 and 900 C) of an Si{sub 3}N{sub 4}-MoSi{sub 2} composite was studied. Alumina particles entrained in a stream of nitrogen gas impacted the target material at a velocity of 40 m/s. Impingement angles of either 60, 75 or 90{degree} were used. It was found that the erosion rate for the Si{sub 3}N{sub 4}-MoSi{sub 2} composite (measured at room temperature) was a maximum at the 90{degree} incident angle, erosion behavior typical of brittle materials. The erosion rate of the composite at a 75{degree} impingement angle increased slightly with increasing test temperature up to 700 C (i.e. from 4.1 to 4.9 mm{sup 3}/g). At 900 C, the measured erosion rate decreased to 2.9 mm{sup 3}/g. The erosion behavior of the Si{sub 3}N{sub 4}-MoSi{sub 2} composite was compared to that of commercially available Si{sub 3}N{sub 4}, WC-6%Co, 304 SS, IN-800 (Ni-Fe-Cr alloy) and Stellite-6B (Co-Cr-W-Mo alloy).

Alman, D.E.; Tylczak, J.H.; Hawk, J.A.; Hebsur, M.G.

1999-03-15T23:59:59.000Z

437

Solid particle erosion behavior of an Si[sub 3]N[sub 4]-MoSi[sub 2] composite at room and elevated temperatures  

SciTech Connect

The solid particle erosion behavior at room and elevated temperatures (180, 500, 700 and 900 C) of an Si[sub 3]N[sub 4]-MoSi[sub 2] composite was studied. Alumina particles entrained in a stream of nitrogen gas impacted the target material at a velocity of 40 m/s. Impingement angles of either 60, 75 or 90[degree] were used. It was found that the erosion rate for the Si[sub 3]N[sub 4]-MoSi[sub 2] composite (measured at room temperature) was a maximum at the 90[degree] incident angle, erosion behavior typical of brittle materials. The erosion rate of the composite at a 75[degree] impingement angle increased slightly with increasing test temperature up to 700 C (i.e. from 4.1 to 4.9 mm[sup 3]/g). At 900 C, the measured erosion rate decreased to 2.9 mm[sup 3]/g. The erosion behavior of the Si[sub 3]N[sub 4]-MoSi[sub 22048mposite was compared to that of commercially available Si[sub 3]N[sub 4], WC-6%Co, 304 SS, IN-800 (Ni-Fe-Cr alloy) and Stellite-6B (Co-Cr-W-Mo alloy).

Alman, D.E.; Tylczak, J.H.; Hawk, J.A.; Hebsur, M.G.

1999-03-15T23:59:59.000Z

438

Use of SiBN and SiBON films prepared by plasma enhanced chemical vapor deposition from borazine as interconnection dielectrics  

SciTech Connect

Thin films of silicon boron nitride (SiBN) of typical composition Si{sub 0.09}B{sub 0.39}N{sub 0.51} and silicon boron oxynitride (SiBON) of typical composition Si{sub 0.16}B{sub 0.29}O{sub 0.41}N{sub 0.14} were prepared by plasma enhanced chemical vapor deposition and the properties of these films were evaluated with respect to their suitability as interconnection dielectrics in microelectronic fabrication. Films were deposited on 125 mm silicon substrates in a parallel-plate reactor at a substrate temperature of 400 C and a plasma power of 0.5 W/cm{sup 2}. Boron nitride, for comparison of electrical properties, was deposited from borazine (B{sub 3}N{sub 3}H{sub 6}); silicon boron nitride was deposited from borazine, disilane (Si{sub 2}H{sub 6}), and ammonia (NH{sub 3}); silicon boron oxynitride was deposited from borazine, disilane, ammonia, and nitrous oxide (N{sub 2}O). Metal-insulator-metal capacitors were fabricated and electrical measurements indicated that all three films had excellent dielectric properties with dielectric constants of 4.1, 4.7, and 3.9 for BN, SiBN, and SiBON, respectively. Tests of conformality indicated that deposition into trenches with an aspect ratio of 4:1 gave conformality greater than 70%. Silicon boron oxynitride was shown to be an excellent barrier to the diffusion of copper. A planar, single level metal-insulator structure was constructed using a SiBN/SiBON insulator with copper metallization.

Kane, W.F.; Cohen, S.A.; Hummel, J.P.; Luther, B. [IBM Research Div., Yorktown Heights, NY (United States). T.J. Watson Research Center; Beach, D.B. [Oak Ridge National Lab., TN (United States). Chemical and Analytical Sciences Div.

1997-02-01T23:59:59.000Z

439

Novel Phase Relations in the Wurtzite-Structure Based SiC-AlN ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Preliminary results of first principles phase diagram calculations for the quasibinary system SiC-AlN suggest a phase diagram in which there are ...

440

SiNode Systems Wins the Second Annual DOE National Clean Energy ...  

The Department of Energy is proud to announce that SiNode Systems from Northwestern University has won the second annual DOE National Clean Energy Business Plan ...

Note: This page contains sample records for the topic "tran si tion" 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

Combustion-reacted SiC-AlN Presinter and Pressureless Infiltration ...  

Science Conference Proceedings (OSTI)

Presentation Title, Combustion-reacted SiC-AlN Presinter and Pressureless Infiltration with ... Laser Deposited In Situ TiC Reinforced Nickel Matrix Composites: ...

442

Dielectric properties of chemically vapour-deposited Si 3 N 4  

Science Conference Proceedings (OSTI)

measured by using a transformer bridge (Ando; TR-. 10C). ..... TABLE I Deposition conditions and some properties of CVD-Si3N 4. Specimen. Tdep*. P,

443

Stress Management: X-Rays Reveal Si Thin-Film Defects  

Science Conference Proceedings (OSTI)

Stress Management: X-Rays Reveal Si Thin-Film Defects. ... Advanced Photon Source, and supported in part by the Department of Energy. ...

2011-04-26T23:59:59.000Z

444

High Energy Density Anode Materials Based on SiO-SnCo/FeC for ...  

Science Conference Proceedings (OSTI)

Abstract Scope, High energy density anode material SiO-SnCoC is synthesized by mechanical alloying method and tested for lithium battery applications.

445

Cyclability Study of Si/TiN/C Composite Anode with High Rate ...  

Science Conference Proceedings (OSTI)

Presentation Title, Cyclability Study of Si/TiN/C Composite Anode with High Rate Capability for Lithium-Ion Batteries. Author(s), Jiguo Tu, Shuqiang Jiao, ...

446

Mechanical Damping Properties of Al-Si Closed-Cell Aluminum Foam  

Science Conference Proceedings (OSTI)

The measured loss factor shows that Al-Si closed-cell aluminum foam have a damping capacity which is independent of frequency and increases with ...

447

Influence of Strain Hardening on Rheological Properties of AlMgSi ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Elimination of inactive rheologically supporting steel cores in overhead line conductors and replacing them with highly resistant AlMgSi alloy ...

448

Irradiation Effects on Fission Product Behavior in PyC and SiC  

Science Conference Proceedings (OSTI)

Abstract Scope, Understanding the mechanism and quantifying the rate by which fission products diffuse through CVD ?-silicon carbide (SiC) is crucial to the ...

449

Atmospheric Plasma Processing of SiC: A Novel Method to Improve ...  

Science Conference Proceedings (OSTI)

Symposium, Innovative Processing and Synthesis of Ceramics, Glasses and Composites. Presentation Title, Atmospheric Plasma Processing of SiC: A Novel  ...

450

Spectrum of electron-hole states of the Si/Ge structure with Ge quantum dots  

Science Conference Proceedings (OSTI)

The lateral photoconductivity spectra of Si/Ge multilayer structures with Ge quantum dots of various sizes are investigated. We observed optical transition lines between the hole levels of quantum dots and electronic states of Si. This enabled us to construct a detailed energy level diagram of the electron-hole spectrum of the Si/Ge structures. It is shown that the hole levels of Ge quantum dots are successfully described by the 'quantum box' model using the actual sizes of Ge islands. It I found that the position of the longwavelength photosensitivity boundary of Si/Ge structures with Ge quantum dots can be controlled by changing the growth parameters.

Talochkin, A. B., E-mail: tal@thermo.isp.nsc.ru; Chistokhin, I. B., E-mail: igor@thermo.isp.nsc.ru [Russian Academy of Sciences, Institute of Semiconductor Physics, Siberian Branch (Russian Federation)

2011-09-15T23:59:59.000Z

451

The system Ta-V-Si: Crystal structure and phase equilibria  

SciTech Connect

Phase relations have been evaluated for the Ta-V-Si system at 1500 and 1200 Degree-Sign C. Three ternary phases were found: {tau}{sub 1}-(Ta,V){sub 5}Si{sub 3} (Mn{sub 5}Si{sub 3}-type), {tau}{sub 2}-Ta(Ta,V,Si){sub 2} (MgZn{sub 2}-type) and {tau}{sub 3}-Ta(Ta,V,Si){sub 2} (MgCu{sub 2}-type). The crystal structure of {tau}{sub 2}-Ta(Ta,V,Si){sub 2} was solved by X-ray single crystal diffraction (space group P6{sub 3}/mmc). Atom order in the crystal structures of {tau}{sub 1}-(Ta,V){sub 5}Si{sub 3} (Mn{sub 5}Si{sub 3} type) and {tau}{sub 3}-Ta(Ta,V,Si){sub 2} was derived from X-ray powder diffraction data. A large homogeneity range was found for {tau}{sub 1}-(Ta{sub x}V{sub 1-x}){sub 5}Si{sub 3} revealing random exchange of Ta and V at a constant Si content. At 1500 Degree-Sign C, the end points of the {tau}{sub 1}-phase solution (0.082{<=}x{<=}0.624) are in equilibrium with the solutions (Ta{sub 1-x}V{sub x}){sub 5}Si{sub 3} (Cr{sub 5}B{sub 3} type, 0{<=}x{<=}0.128) and (Ta{sub x}V{sub 1-x}){sub 5}Si{sub 3} (W{sub 5}Si{sub 3} type, 0{<=}x{<=}0.048). - Graphical abstract: Phase relations have been evaluated for the Ta-V-Si system at 1500 and 1200 Degree-Sign C. Highlights: Black-Right-Pointing-Pointer Phase relations have been evaluated for the Ta-V-Si system at 1500 and 1200 Degree-Sign C. Black-Right-Pointing-Pointer Three ternary phases were found at 1500 Degree-Sign C. Black-Right-Pointing-Pointer At 1500 Degree-Sign C, {tau}{sub 1}-phase has large homogeneity region (0.064{<=}x{<=}0.624).

Khan, A.U. [Institute of Physical Chemistry, University of Vienna, Waehringerstrasse 42, A-1090 Wien (Austria); Broz, P. [Masaryk University, Department of Chemistry, Kolarska 2, 611 37, Brno (Czech Republic); Masaryk University, Central European Institute of Technology, CEITEC, Kamenice 753/5, 625 00, Brno (Czech Republic); Niu, H.Y. [Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang (China); Bursik, J. [Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 61662 Brno (Czech Republic); Grytsiv, A. [Institute of Physical Chemistry, University of Vienna, Waehringerstrasse 42, A-1090 Wien (Austria); Chen, X.-Q. [Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang (China); Giester, G. [Institute of Mineralogy and Crystallography, University of Vienna, Althanstrasse 14, A-1090 Wien (Austria); Rogl, P., E-mail: peter.franz.rogl@univie.ac.at [Institute of Physical Chemistry, University of Vienna, Waehringerstrasse 42, A-1090 Wien (Austria)

2012-03-15T23:59:59.000Z

452

Preparing SiC-TiB2 Composite via Liquid Phase Sintering  

Science Conference Proceedings (OSTI)

Some research works showed that the composites of SiC-TiB2 had better mechanical properties than monolithic ceramic. In this study, Silicon carbide – titanium ...

453

Electricity-independent Generation of Si Based on the Use of Rice ...  

Science Conference Proceedings (OSTI)

Presentation Title, Electricity-independent Generation of Si Based on the Use of Rice Husk: A ... Delivering a National Process Design Unit with Industry Support.

454

CAT-CVD process and its application to preparation of Si-based thin films  

SciTech Connect

This is to review the present understanding on Cat-CVD (catalytic chemical vapor deposition) or hot wire CVD. Firstly, the deposition mechanism in Cat-CVD process is briefly mentioned along with key issues such as the effect of heat radiation and a method to avoid contamination from the catalyzer. Secondly, the properties of Cat-CVD Si-based thin films such as amorphous silicon (a-Si), polycrystalline silicon (poly-Si) and silicon nitride (SiN{sub x}) films are demonstrated, and finally, the feasibility of such films for industrial application is discussed.

Matsumura, Hideki; Masuda, Atsushi; Izumi, Akira

1999-07-01T23:59:59.000Z

455

Vacuum 67 (2002) 641645 Comparison of poly-Si films deposited by UHVCVD and  

E-Print Network (OSTI)

is rough and results in low field effect mobility compared to that obtained by LPCVD using disilane (Si2H6

456

Bulk La(Fe,Si) 13 -based Materials Prepared by SPS Process ...  

Science Conference Proceedings (OSTI)

Giant Low-Field Magnetocaloric Effect with Small Hysteresis Near Room ... Large Room Temperature Magnetoresistance in FeCo-SiN Granular Films · Magnetic ...

457

Status of SiC Power Devices for Compact High Efficiency High ...  

Science Conference Proceedings (OSTI)

... Si Circuits and, hence, 1- 3 % fuel savings for ... Distributed Systems in multiple locations for energy distribution and ... High temp/ density storage & ...

2012-06-08T23:59:59.000Z

458

A Model for Phosphosilicate Glass Deposition via POCl3 for Control of Phosphorus Dose in Si  

SciTech Connect

Effective control of diffused phosphorus profiles in crystalline silicon requires detailed understanding of the doping process. We develop a model and analyze concentration profiles within the deposited phosphosilicate glass (PSG) for a range of POCl3 conditions. During predeposition, a PSG layer with composition nearly independent of process conditions forms. This layer is separated from Si by a thin SiO2 layer. There is also strong accumulation of P at the SiO2-Si interface. A simple linear-parabolic model cannot fully explain the kinetics of thickness and dose; while an improved model including oxygen dependence and dose saturation gives better fits to the experiments.

Chen, Renyu; Wagner, Hannes; Dastgheib-Shirazi, Amir; Kessler, Michael; Zhu, Zihua; Shutthanandan, V.; Altermatt, Pietro P.; Dunham, Scott T.

2012-12-27T23:59:59.000Z

459

Oxidation of the Mo-Si-B Based Coating In Oxygen Deficient ...  

Science Conference Proceedings (OSTI)

... in engine, aircraft and aerospace applications requires an external protective ... Hot Corrosion of SiC Cermaic Matrix Composites in Marine Combustion ...

460

Anomalous Small-angle Scattering with Soft X-rays at Al and Si K ...  

Science Conference Proceedings (OSTI)

Anomalous Small-angle Scattering with Soft X-rays at Al and Si K Absorption ... and Cooling Cycles in a High Strength Quenched and Tempered Structural Steel.

Note: This page contains sample records for the topic "tran si tion" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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461

The Impact and Control of Defects in III-V/Si Heterostructures for ...  

Science Conference Proceedings (OSTI)

Accelerated Light Induced Degradation, ALID, for Monitoring of Defects in PV Silicon Wafers and Solar Cells · Analysis of Defect Formation in 4H-SiC Epitaxial

462

Reticulated vitreous carbon foam saturated with SiO2 aerogel for ...  

Science Conference Proceedings (OSTI)

The heat insulation composites, RVC carbon foam matrix impregnated with SiO2 aerogel, were processed by multi-solgel method coupled with dipping ...

463

Origin of Tough Behavior in Short Carbon Fiber Dispersed SiC ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Short carbon fiber-dispersed SiC matrix composites have been used for advanced ... Ceramic Matrix Composites for Nuclear and Fusion Energy.

464

Everything You Want To Know About SI (But Were Afraid to ...  

Science Conference Proceedings (OSTI)

... the National Institute of Standards and Technology (NIST) has just released a guide for researchers, available to all, on correct SI usage and unit ...

2011-05-04T23:59:59.000Z

465

Hot Corrosion of SiC Cermaic Matrix Composites in Marine ...  

Science Conference Proceedings (OSTI)

The hot corrosion performance of monolithic SiC was characterized as a function of temperature (between 900° ... Hardware Materials in Carbonate Fuel Cell.

466

F-8: Modeling of Mn-Ni-Si-Cu Precipitation in Reactor Pressure ...  

Science Conference Proceedings (OSTI)

Presentation Title, F-8: Modeling of Mn-Ni-Si-Cu Precipitation in Reactor .... Steels 316 and Comparison with the Rate Theory Model of a Multicomponent System.

467

Fe-rich FeSiBPCu Nano-crystalline Soft Magnetic Alloys ...  

Science Conference Proceedings (OSTI)

Symposium, Magnetic Materials for Energy Applications IV ... Fe-rich FeSiBPCu Nano-crystalline Soft Magnetic Alloys Contributable To Energy-saving. Author(s)  ...

468

Major deep levels with the same microstructures observed in n-type 4H-SiC and 6H-SiC  

SciTech Connect

Major deep levels observed in as-grown and irradiated n-type 4H-SiC and 6H-SiC epilayers have been investigated. After low-energy electron irradiation, by which only carbon atoms are displaced, five traps, EH1 (E{sub C}-0.36 eV), Z{sub 1}/Z{sub 2} (E{sub C}-0.65 eV), EH3 (E{sub C}-0.79 eV), EH5 (E{sub C}-1.0 eV), and EH6/7 (E{sub C}-1.48 eV), were detected in 4H-SiC and four traps, E{sub 1}/E{sub 2} (E{sub C}-0.45 eV), RD{sub 5} (E{sub C}-0.57 eV), ES (E{sub C}-0.80 eV), and R (E{sub C}-1.25 eV), were detected in 6H-SiC. The Z{sub 1}/Z{sub 2}, EH6/7 centers in 4H-SiC and the E{sub 1}/E{sub 2}, R centers in 6H-SiC exhibit common features as follows: their generation rates by the e{sup -}-irradiation were almost the same each other, their concentrations were not changed by heat treatments up to 1500 deg. C, and they showed very similar annealing behaviors at elevated temperatures. Furthermore, these defect centers were almost eliminated by thermal oxidation. Taking account of the observed results and the energy positions, the authors suggest that the Z{sub 1}/Z{sub 2} center in 4H-SiC corresponds to the E{sub 1}/E{sub 2} center in 6H-SiC, and the EH6/7 center in 4H-SiC to the R center in 6H-SiC, respectively. Since the concentrations of these four centers are almost the same for as-grown, electron-irradiated, annealed, and oxidized samples, these centers will contain a common intrinsic defect, most likely carbon vacancy. The authors also observed similar correspondence for other thermally unstable traps in 4H-SiC and 6H-SiC.

Sasaki, S.; Kawahara, K.; Feng, G.; Alfieri, G.; Kimoto, T. [Department of Electronic Science and Engineering, Kyoto University, Katsura, Nishikyo, Kyoto 615-8510 (Japan)

2011-01-01T23:59:59.000Z

469

Giant tunneling magnetoresistance in Co{sub 2}MnSi/Al-O/Co{sub 2}MnSi magnetic tunnel junctions  

SciTech Connect

Magnetic tunnel junctions (MTJs) with a stacking structure of Co{sub 2}MnSi/Al-O/Co{sub 2}MnSi were fabricated using magnetron sputtering system. Fabricated MTJ exhibited an extremely large tunneling magnetoresistance (TMR) ratio of 570% at low temperature, which is the highest TMR ratio reported to date for an amorphous Al-O tunneling barrier. The observed dependence of tunneling conductance on bias voltage clearly reveals the half-metallic energy gap of Co{sub 2}MnSi. The origins of large temperature dependence of TMR ratio were discussed on the basis of the present results.

Sakuraba, Y.; Hattori, M.; Oogane, M.; Ando, Y.; Kato, H.; Sakuma, A.; Miyazaki, T.; Kubota, H. [Department of Applied Physics, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-05, Aramaki, Aoba-ku, Sendai 980-8579 (Japan); Nanoelectronics Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Umezono, Tsukuba 305-8568 (Japan)

2006-05-08T23:59:59.000Z

470

The effect of structural defects in SiC particles on the static & dynamic mechanical response of a 15 volume percent SiC/6061-Al matrix composite  

SciTech Connect

Static and Dynamic mechanical tests, and microstructural examinations performed on a SiC particle reinforced 6061-Al matrix composite indicated that particle cracking significantly affected the strength, strain hardening, and failure mechanism of the composite. Cracks were observed to nucleate and propagate on stacking faults and interfaces between the various phases within the reinforcing SiC particles. Planar defects were the predominant artifacts seen in the SiC particles. Partial dislocations were also observed bounding the stacking faults within the reinforcement phase.

Vaidya, R.U.; Song, S.G.; Zurek, A.K.; Gray, G.T. III

1995-09-01T23:59:59.000Z

471

Perspectives on effectively constraining the location of a massive trans-Plutonian obejct with the New Horizons spacecraft: a sensitivity analysis  

E-Print Network (OSTI)

The radio tracking apparatus of the New Horizons spacecraft, currently traveling to the Pluto system where its arrival is scheduled for July 2015, should be able to reach an accuracy of 10 m (range) and 0.1 mm s^-1 (range-rate) over distances up to 50 au. This should allow to effectively constrain the location of a putative trans-Plutonian massive object, dubbed Planet X (PX) hereafter, whose existence has recently been postulated for a variety of reasons connected with, e.g., the architecture of the Kuiper belt and the cometary flux from the Oort cloud. Traditional scenarios involve a rock-ice planetoid with mX = 0.7mE at some 100 - 200 au, or a Jovian body with mX = 5mJ at about 10,000 - 20,000 au; as a result of our preliminary sensitivity analysis, they should be detectable by New Horizons since they would impact its range at a km level or so over a time span six years long. Conversely, range residuals statistically compatible with zero having an amplitude of 10 m would imply that PX, if it exists, could ...

Iorio, Lorenzo

2013-01-01T23:59:59.000Z

472

Natural Gas Productive Capacity for the Lower 48 States 1986 ...  

U.S. Energy Information Administration (EIA)

con strued as ad vo cat ing or re flect ing any pol icy po si tion of the De part ment of En ergy o r any other or - gani za tion. Preface

473

Creep performance of candidate SiC and Si{sub 3}N{sub 4} materials for land-based, gas turbine engine components  

DOE Green Energy (OSTI)

The tensile creep-rupture performance of a commercially available gas pressure sintered silicon nitride (Si{sub 3}N{sub 4}) and a sintered silicon carbide (SiC) is examined at 1038, 1150, and 1350 C. These two ceramic materials are candidates for nozzles and combustor tiles that are to be retrofitted in land-based gas turbine engines, and interest exists to investigate their high-temperature mechanical performance over service times up to, and in excess of, 10,000 hours ({approx}14 months). To achieve lifetimes approaching 10,000 hours for the candidate Si{sub 3}N{sub 4} ceramic, it was found (or it was estimated based on ongoing test data) that a static tensile stress of 300 MPa at 1038 and 1150 C, and a stress of 125 MPa at 1350 C cannot be exceeded. For the SiC ceramic, it was estimated from ongoing test data that a static tensile stress of 300 MPa at 1038 C, 250 MPa at 1150 C, and 180 MPa at 1350 C cannot be exceeded. The creep-stress exponents for this Si{sub 3}N{sub 4} were determined to be 33, 17, and 8 for 1038, 1150, and 1350 C, respectively. The fatigue-stress exponents for the Si{sub 3}N{sub 4} were found to be equivalent to the creep exponents, suggesting that the fatigue mechanism that ultimately causes fracture is controlled and related to the creep mechanisms. Little success was experienced at generating failures in the SiC after several decades of time through exposure to appropriate tensile stress; it was typically observed that if failure did not occur on loading, then the SiC specimens most often did not creep-rupture. However, creep-stress exponents for the SiC were determined to be 57, 27, and 11 for 1038, 1150, and 1350 C, respectively. For SiC, the fatigue-stress exponents did not correlate as well with creep-stress exponents. Failures that occurred in the SiC were a result of slow crack growth that was initiated from the specimen`s surface.

Wereszczak, A.A.; Kirkland, T.P. [Oak Ridge National Lab., TN (United States). High Temperature Materials Lab.

1997-10-01T23:59:59.000Z

474

Method of preparing (CH.sub.3).sub.3 SiNSO and byproducts thereof  

DOE Patents (OSTI)

(CH.sub.3).sub.3 SiNSO is produced by the reaction of ((CH.sub.3).sub.3 Si).sub.2 NH with SO.sub.2. Also produced in the reaction are ((CH.sub.3).sub.3 Si).sub.2 O and a new solid compound [NH.sub.4 ][(CH.sub.3).sub.3 SiOSO.sub.2 ]. Both (CH.sub.3).sub.3 SiNSO and [NH.sub.4 ][(CH.sub.3).sub.3 SiOSO.sub.2 ] have fluorescent properties. The reaction of the subject invention is used in a method of measuring the concentration of SO.sub.2 pollutants in gases. By the method, a sample of gas is bubbled through a solution of ((CH.sub.3).sub.3 Si).sub.2 NH, whereby any SO.sub.2 present in the gas will react to produce the two fluorescent products. The measured fluorescence of these products can then be used to calculate the concentration of SO.sub.2 in the original gas sample. The solid product [NH.sub.4 ][(CH.sub.3).sub.3 SiOSO.sub.2 ] may be used as a standard in solid state NMR spectroscopy.

Spicer, Leonard D. (Salt Lake City, UT); Bennett, Dennis W. (Clemson, SC); Davis, Jon F. (Salt Lake City, UT)

1984-01-01T23:59:59.000Z

475

Selective gene silencing in activated leukocytes by targeting siRNAs to the integrin lymphocyte  

E-Print Network (OSTI)

to suppress gene expression and cell proliferation only in activated lymphocytes. The siRNA-fusion proteinSelective gene silencing in activated leukocytes by targeting siRNAs to the integrin lymphocyte are resistant to lipid-based transfection in vitro and are difficult to target in vivo. We show here

Lieberman, Judy

476

All-Hot-Wire Chemical Vapor Deposition a-Si:H Solar Cells  

DOE Green Energy (OSTI)

Efficient hydrogenated amorphous silicon (a-Si:H) nip solar cells have been fabricated with all doped and undoped a-Si:H layers deposited by hot-wire chemical vapor deposition (HWCVD). The total deposition time of all layers, except the top ITO-contact, is less than 4 minutes.

Iwaniczko, E.; Wang, Q.; Xu, Y.; Nelson, B. P.; Mahan, A. H.; Crandall, R. S.; Branz, H. M.

2000-01-01T23:59:59.000Z

477

Mechanical and fracture behaviors of elastomer-rich thermoplastic polyolefin/SiCp nanocomposites  

Science Conference Proceedings (OSTI)

Elastomer-rich thermoplastic polyolefin (ETPO) resin containing 70wt% maleated styrene-ethylene-butadiene-styrene (SEBSg-MA) and 30wt% polypropylene and its nanocomposites filled with 1-5wt% SiC nanoparticles (SiCp) were fabricated using extrusion ...

Cheng Zhu Liao; Sie Chin Tjong

2010-01-01T23:59:59.000Z

478

Testing the Simple Biosphere Model (SiB) Using Point Micrometeorological and Biophysical Data  

Science Conference Proceedings (OSTI)

The Simple Biosphere model (SiB) of Sellers et al. (1986) was designed for use within General Circulation Models (GCMs) of the earth's atmosphere. The main objective of SiB is to provide a biophysically realistic description of those processes ...

P. J. Sellers; J. L. Dorman

1987-05-01T23:59:59.000Z

479

MoSi2 and Other Silicides as High Temperature Structural Materials  

Science Conference Proceedings (OSTI)

... R.W. Stusrud, R.A. MacKay,. D.L. Anton, T. Khan, R.D. Kissinger, D.L. Klarstmm ..... 'I. 3 10-S d. 5. Q. H. 3 10= g. 5. E a. E m-7. 'E 5, .- z. 10-8 '. 5 c:3si MoSi2. //II.

480

Microscopic surface structure of C/SiC composite mirrors for space cryogenic telescopes  

E-Print Network (OSTI)

We report on the microscopic surface structure of carbon-fiber-reinforced silicon carbide (C/SiC) composite mirrors that have been improved for the Space Infrared Telescope for Cosmology and Astrophysics (SPICA) and other cooled telescopes. The C/SiC composite consists of carbon fiber, silicon carbide, and residual silicon. Specific microscopic structures are found on the surface of the bare C/SiC mirrors after polishing. These structures are considered to be caused by the different hardness of those materials. The roughness obtained for the bare mirrors is 20 nm rms for flat surfaces and 100 nm rms for curved surfaces. It was confirmed that a SiSiC slurry coating is effective in reducing the roughness to 2 nm rms. The scattering properties of the mirrors were measured at room temperature and also at 95 K. No significant change was found in the scattering properties through cooling, which suggests that the microscopic surface structure is stable with changes in temperature down to cryogenic values. The C/SiC mirror with the SiSiC slurry coating is a promising candidate for the SPICA telescope.

Keigo Enya; Takao Nakagawa; Hidehiro Kaneda; Takashi Onaka; Tuyoshi Ozaki; Masami Kume

2007-07-10T23:59:59.000Z

Note: This page contains sample records for the topic "tran si tion" 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

Growth temperature dependence of epitaxial Gd2O3 films on Si(111)  

Science Conference Proceedings (OSTI)

This article reports on the epitaxy of crystalline high @k oxide Gd"2O"3 layers on Si(111) for CMOS gate application. Epitaxial Gd"2O"3 thin films have been grown by Molecular Beam Epitaxy (MBE) on Si(111) substrates between 650 and 750^oC. The structural ... Keywords: Crystalline high ? oxide, Electrical properties, Gd2O3, Molecular beam epitaxy

G. Niu; B. Vilquin; N. Baboux; C. Plossu; L. Becerra; G. Saint-Grions; G. Hollinger

2009-07-01T23:59:59.000Z

482

Si Nanostructures Embedded into Crystalline Rare Earth Oxide Matrix for Opto and Nano Electronic Devices  

Science Conference Proceedings (OSTI)

We describe a novel approach to grow Si nanostructures embedded into crystalline rare earth oxides using molecular beam epitaxy. By efficiently exploiting the growth kinetics during growth one could create nanostructures exhibiting various dimensions, ... Keywords: Si quantum dot, quantum confinement, nonvolatile memory, optoelectronics, rare earth oxide, molecular beam epitaxy

H. J. Osten; A. Laha; A. Fissel

2010-02-01T23:59:59.000Z

483

Simple synthesis and growth mechanism of core/shell cdse/SiOx nanowires  

Science Conference Proceedings (OSTI)

Core-shell-structured CdSe/SiOx nanowires were synthesized on an equilateral triangle Si (111) substrate through a simple one-step thermal evaporation process. SEM, TEM, and XRD investigations confirmed the core-shell structure; that is, the ...

Guozhang Dai; Shengyi Yang; Min Yan; Qiang Wan; Qinglin Zhang; Anlian Pan; Bingsuo Zou

2010-01-01T23:59:59.000Z

484

Ledge-flow-controlled catalyst interface dynamics during Si nanowire growth  

E-Print Network (OSTI)

formation from Pd silicide crystals under disilane exposure. A Si crystal nucleus forms by phase separation dissociation of disilane and coupled Pd and Si diffusion. Our results establish an atomistic framework to disilane in an environmental transmission electron microscope (ETEM). This provides a lattice- resolved

Dunin-Borkowski, Rafal E.

485

Statespecific study of hydrogen desorption from Si(100)(21): Comparison of disilane and hydrogen adsorption  

E-Print Network (OSTI)

Statespecific study of hydrogen desorption from Si(100)(2Ã?1): Comparison of disilane and hydrogen://avspublications.org/jvsta/about/rights_and_permissions #12;State-specific study of hydrogen desorption from Si(1 OO)~(2 X 1): Comparison of disilane with either disilane (SizH6 ) or atomic hydrogen. Adsorption of disilane with subsequent desorption of H2

Zare, Richard N.

486

Graphene on Carbon-face SiC{0001} Surfaces Formed in a Disilane Environment  

E-Print Network (OSTI)

Graphene on Carbon-face SiC{0001} Surfaces Formed in a Disilane Environment N. Srivastavaa , Guowei-face, graphene, interface structure, low energy electron microscopy, disilane Abstract. The formation of epitaxial graphene on SiC( 1000 ) in a disilane environment is studied. The higher graphitization

Feenstra, Randall

487

Ge integration on Si via rare earth oxide buffers: From MBE to CVD (Invited Paper)  

Science Conference Proceedings (OSTI)

Single crystalline rare earth oxide heterostructures are flexible buffer systems to achieve the monolithic integration of Ge thin film structures on Si. The development of engineered oxide systems suitable for mass-production compatible CVD processes ... Keywords: Engineered Si wafers, Ge integration, Heteroepitaxy, Rare earth oxides, X-ray diffraction

T. Schroeder; A. Giussani; H. -J. Muessig; G. Weidner; I. Costina; Ch. Wenger; M. Lukosius; P. Storck; P. Zaumseil

2009-07-01T23:59:59.000Z

488

Application of SiO2 aerogel film with low dielectric constant to intermetal dielectrics  

E-Print Network (OSTI)

Application of SiO2 aerogel film with low dielectric constant to intermetal dielectrics Moon-Ho Jo aerogel film was characterized from its structural and chemical viewpoints. High porosity of material infrared spectroscopy (FT-IR) for their chemical states. The improved electrical properties of SiO2 aerogel

Jo, Moon-Ho

489

Stress evolution during Ni-Si compound formation for fully silicided (FUSI) gates  

Science Conference Proceedings (OSTI)

The stress (force) evolution during the formation of different Ni silicide phases was monitored by in situ curvature measurements, for the reaction of thin Ni films of various thicknesses with 100nm polycrystalline-Si deposited on oxidized (100) Si substrates. ... Keywords: In situ XRD, In situ curvature measurements, Ni-silicides

C. Torregiani; C. Van Bockstael; C. Detavernier; C. Lavoie; A. Lauwers; K. Maex; J. A. Kittl

2007-11-01T23:59:59.000Z

490

In adsorption on Si(112) and its impact on Ge growth  

Science Conference Proceedings (OSTI)

The change of the Si(112) surface morphology and structure induced by In adsorption, as well as the impact of In preadsorption on the growth kinetics and island morphology in Ge/Si(112) epitaxy, has been investigated by means of low-energy electron microscopy ...

M. Speckmann; Th. Schmidt; J. I. Flege; J. Falta

2011-07-01T23:59:59.000Z

491

Room temperature 1.6 m electroluminescence from Ge light emitting diode on Si substrate  

E-Print Network (OSTI)

Room temperature 1.6 µm electroluminescence from Ge light emitting diode on Si substrate Szu n+/p light emitting diode on a Si substrate. Unlike normal electrically pumped devices, this device.4670) Optical materials; (230.3670) Light-emitting diodes. References and links 1. L. C. Kimerling, "Silicon

Vuckovic, Jelena

492

Point defect engineered Si sub-bandgap light-emitting diode  

E-Print Network (OSTI)

Point defect engineered Si sub-bandgap light-emitting diode Jiming Bao1 , Malek Tabbal1,2 , Taegon light emission in Si and demonstrate a sub-bandgap light emitting diode based on the introduction.3670) Light-emitting diodes; (160.6000) Semiconductors; (130-0250) Optoelectronics. References and links 1. S

493

B.Dolgoshein, Overview of SiPM development at MEPhI/Pulsar  

E-Print Network (OSTI)

650 700 0 10 20 30 40 50 60 70 80 90 Absorption length x0 , m T (70 nm SiO2 ) SiPM (T = -60 0 C) Cooling helps (-50 C) DR increases with overvoltage (tunneling) -> deep cooling doesn't help! Dark Rate

Kemner, Ken

494

Rotational Spectrum and Structure of Si3 M. C. McCarthy and P. Thaddeus  

E-Print Network (OSTI)

large centrifugal distortion suggest that the molecule possesses a shallow bending potential. Si3 initio calculations [3,8­11] and infrared and optical [12] studies of Si3 trapped in inert gas matrices by applying a low-current dc discharge to a short gas pulse created by a fast mechani- cal valve, the gas

495

Fabrication of Bulk-Si FinFET using CMOS compatible process  

Science Conference Proceedings (OSTI)

A new CMOS (Complementary Metal Oxide Semiconductor) compatible Bulk-Si FinFETs fabrication process has been proposed. Compared with conventional fabrication processes of SOI (Silicon On Insulator) and Bulk-Si FinFETs, this new approach is of low cost ... Keywords: Bulk, FinFET, Multi-gate

Huajie Zhou; Yi Song; Qiuxia Xu; Yongliang Li; Huaxiang Yin

2012-06-01T23:59:59.000Z

496

Effect of a surface pre-treatment on graphene growth using a SiC substrate  

Science Conference Proceedings (OSTI)

This study reports surface pre-treatment techniques for the formation of a high-quality graphene layer on a SiC surface. It is demonstrated that silicon passivation of SiC surface using a silane flow and subsequent sacrificial oxidation can significantly ... Keywords: Graphene, Sacrificial oxidation, Silane treatment, Sulfur hexafluoride (SF6), Surface passivation

Jun-Ho Seo; Byung-Jin Kang; Jeong Hun Mun; Sung-Kyu Lim; Byung Jin Cho

2010-10-01T23:59:59.000Z

497

Scanning tunneling microscopy studies of the surfaces of a-Si:H and a-SiGe:H films  

SciTech Connect

The report contains a detailed description of the experimental complexities encountered in developing scanning tunneling microscope (STM) probing of atomic structure on the surface of freshly-grown hydrogenated-amorphous semiconductors. It also contains a speculative microscopic film-growth model that explains differences between the disorder in CVD grown a-Ge:H versus a-Si:H films. This model is derived from prior results obtained in the chemical analysis of GeH{sub 4} plasmas, combined with surface reaction and thermodynamic considerations. The neutral radical fragments of silane, disilane and germane dissociation in discharges, which dominate the vapor and film-growth reactions, have been deduced from detailed analysis of prior data and are reported. 4 refs., 7 figs.

Gallagher, A.; Ostrom, R.; Tannenbaum, D. (National Inst. of Standards and Technology, Boulder, CO (USA))

1991-06-01T23:59:59.000Z

498

Grain boundary effects on defect production and mechanical properties of irradiated nanocrystalline SiC  

SciTech Connect

Grain boundaries (GBs) are known to play an important role in determining the mechanical and functional properties of nanocrystalline materials. In this study, we used molecular dynamics simulations to investigate the effects of damaged GBs on the mechanical properties of SiC that is irradiated by 10 keV Si atoms. The results reveal that irradiation promotes GB sliding and reduces the ability of GBs to block dislocations, which improves the deformation ability of nanocrystalline SiC. However, irradiation causes local rearrangements in disordered clusters and pinning of dislocations in the grain region, which restrains its deformation. These two mechanisms arise from the irradiation effects on GBs and grains, and these mechanisms compete in nanocrystalline SiC during irradiation. The irradiation effects on GBs dominate at low irradiation doses, and the effects on grains dominate at high doses; the result of these combined effects is a peak ductility of 0.09 dpa in nanocrystalline SiC.

Jin Enze; Niu Lisha; Lin Enqiang; Song Xiaoxiong [AML, Department of Engineering Mechanics, Tsinghua University, Beijing 100084 (China)

2012-05-15T23:59:59.000Z

499

Heat Pipe Embedded AlSiC Plates for High Conductivity - Low CTE Heat Spreaders  

SciTech Connect

Heat pipe embedded aluminum silicon carbide (AlSiC) plates are innovative heat spreaders that provide high thermal conductivity and low coefficient of thermal expansion (CTE). Since heat pipes are two phase devices, they demonstrate effective thermal conductivities ranging between 50,000 and 200,000 W/m-K, depending on the heat pipe length. Installing heat pipes into an AlSiC plate dramatically increases the plate’s effective thermal conductivity. AlSiC plates alone have a thermal conductivity of roughly 200 W/m-K and a CTE ranging from 7-12 ppm/ deg C, similar to that of silicon. An equivalent sized heat pipe embedded AlSiC plate has effective thermal conductivity ranging from 400 to 500 W/m-K and retains the CTE of AlSiC.

Johnson, Matthew (DOE/NNSA Kansas City Plant (United States)); Weyant, J.; Garner, S. (Advanced Cooling Technologies, Inc. (Lancaster, PA (United States)); Occhionero, M. (CPS Technologies Corporation, Norton, MA (United States))

2010-01-07T23:59:59.000Z

500

Antireflection and SiO2 Surface Passivation by Liquid-Phase Chemistry for Efficient Black Silicon Solar Cells: Preprint  

Science Conference Proceedings (OSTI)

We report solar cells with both black Si antireflection and SiO2 surface passivation provided by inexpensive liquid-phase chemistry, rather than by conventional vacuum-based techniques. Preliminary cell efficiency has reached 16.4%. Nanoporous black Si antireflection on crystalline Si by aqueous etching promises low surface reflection for high photon utilization, together with lower manufacturing cost compared to vacuum-based antireflection coating. Ag-nanoparticle-assisted black Si etching and post-etching chemical treatment recently developed at NREL enables excellent control over the pore diameter and pore separation. Performance of black Si solar cells, including open-circuit voltage, short-circuit current density, and blue response, has benefited from these improvements. Prior to this study, our black Si solar cells were all passivated by thermal SiO2 produced in tube furnaces. Although this passivation is effective, it is not yet ideal for ultra-low-cost manufacturing. In this study, we report, for the first time, the integration of black Si with a proprietary liquid-phase deposition (LPD) passivation from Natcore Technology. The Natcore LPD forms a layer of solar cells with LPD SiO2 with a spectrum-weighted average reflection lower than 5%, similar to the more costly thermally grown SiO2 approach. However, LPD SiO2 provides somewhat better surface-passivation quality according to the lifetime analysis by the photo-conductivity decay measurement. Moreover, black Si solar cells with LPD SiO2 passivation exhibit higher spectral response at short wavelength compared to those passivated by thermally grown SiO2. With further optimization, the combination of aqueous black Si etching and LPD could provide a pathway for low-cost, high-efficiency crystalline Si solar cells.

Yuan, H. C.; Oh, J.; Zhang, Y.; Kuznetsov, O. A.; Flood, D. J.; Branz, H. M.

2012-06-01T23:59:59.000Z