skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Recent Advances in Engineered Surfaces Nanostructured Coatings & Novel Deposition Techniques.


Abstract not provided.

Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the Next Generation Materials for Defense 2007 held March 28-29, 2007 in Arlington, VA.
Country of Publication:
United States

Citation Formats

Prasad, Somuri V. Recent Advances in Engineered Surfaces Nanostructured Coatings & Novel Deposition Techniques.. United States: N. p., 2007. Web.
Prasad, Somuri V. Recent Advances in Engineered Surfaces Nanostructured Coatings & Novel Deposition Techniques.. United States.
Prasad, Somuri V. Thu . "Recent Advances in Engineered Surfaces Nanostructured Coatings & Novel Deposition Techniques.". United States. doi:.
title = {Recent Advances in Engineered Surfaces Nanostructured Coatings & Novel Deposition Techniques.},
author = {Prasad, Somuri V.},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}

Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • Fusion bonded epoxy powders are being increasingly used to replace traditional coatings on valves and fittings destined for underground service. The development of this technology has highlighted the need for special techniques and performance standards. This paper deals with recent development in this area within the context of the changing requirements of the water and gas industries.
  • Most studies of charged particle energy deposition deal with the stopping of particles by the medium. Predicting the excitation of the medium by the particles has received much less attention. The key to the solution of this latter problem is the assembly of a realistic set of detailed atomic cross sections (DACS) for all important inelastic processes induced by electrons with energies varying from the incident electron energy down to the lowest inelastic threshold. Two methods of assembling such sets are described; one based upon experimental generalized oscillator strengths, the second based upon quantum mechanical calculations using an atomic independentmore » particle model. A continuous slowing down approximation (CSDA) method of utilizing these cross sections for calculating the excitaton of a medium by incident electrons is described, along with the yield spectra method based upon a modified discrete energy bin technique which allows for the discrete nature of the slowing down process, and a method of spatial-yield spectra calculated by Monte Carlo techniques which gives the spatial patterns of various excitations. Finally, the possibility of applying these recent techniques to the prediction of late time SN I spectra, using the radioactive excitation source model is discussed.« less
  • The processing conditions during coating and subsequent drying of sol-gel films strongly affect the final film properties and microstructure. This paper is an over-view of recent advances in theoretical modeling of microstructure evolution in sol-gel thin films. Computational methods in fluid mechanics, mass transfer, and solid mechanics provide insight into the relationships between processing conditions and thin-film coating properties.
  • Sputter deposition principles are related to conventional system classifications such as diode glow discharge, supported plasma discharge and magnetron. Specific variations used at PNL are described, including rf and dc target potential and specialized combination designs. The deposited materials include metals, alloys, oxide, etc. Starting materials are controlled along with other parameters to obtain specific compositions, structures and engineering properties in the sputtered deposits. For hot corrosion-resistant gas turbine airfoil coatings, shuttered sputtering systems with a dc target and a rf target have been used in combinations of glow and thermionically supported discharges to sputter deposit metal-to-ceramic and ceramic-to-metal gradedmore » composition deposits and complex metal-ceramic layered deposits. Target-substrate geometries, mechanical manipulation of substrates, substrate ion bombardment, substrate temperature, deposition rate, sputtering atmosphere and pre-coating surface treatments are adjusted to control grain size and orientation, columnar defect growth, interfacial bonding, composition, stress and surface topography. In the case of TiO/sub 2/ optical coatings deposited by rf-diode glow discharge in reactive Ar/O/sub 2/ atmospheres, phase composition has been controlled from 40% rutile/60% anatase up to 100% rutile by selection of substrate temperature and O/sub 2/ partial pressure. Grain size has been controlled from glassy to 60 nm grain size through the substrate temperature and rf-induced dc ion bombardment of the substrate. Efforts to provide safe and stable immobilization (storage) of krypton-85 from irradiated nuclear fuel, have led to the design of larger and higher deposition rate sputtering systems. One was operated at a net Kr gas trapping rate of 2 liter (STP) per hour with a total power input of 50 kilowatts. The Kr-containing sputter deposit has the approximate composition Fe/sub 0.79/Y/sub 0.12/Kr/sub 0.09/.« less
  • The papers presented at the forum covered the state-of-the-art in transit pricing policies and related issues and charted new directions to guide Urban mass Transportation Administration's transit pricing research and demonstrations program. The following papers were presented: Workshop I (Transit Fare Prepayment) The Importance of Pricing and Fare Innovations; Workshop II (Free and Reduced Fare Transit) Improving Transit Pricing, Transit Pricing Techniques; Workshop III (System and Market Analysis) Transit Fare Policy; and Workshop IV (Advances and New Directions) Subsidy Constraints and Transit Fares in a Proposition 13 Atmosphere.