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Topic Area: Materials Science

Displaying records 381 to 390 of 430 records.
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381. Lattice Statice Green's Function Method for Multiscale Modeling of Point Defects and Extended Defects in Solids
Topic: Materials Science
Published: 7/1/2002
Author: Vinod K Tewary
Abstract: A method for multiscale modeling of point defects such as vacnacies and interstitials at the atomistic level and extended defects such as free surfaces and interfaces at the macroscopic continuum level in a solid is described. The method is based up ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=851303

382. Reliability Improvements in Repair Welding of High Strength Steels
Topic: Materials Science
Published: 7/1/2002
Authors: Ivan Samardzic, Thomas Allen Siewert
Abstract: Engineers often have to deal with repair of weldments after they have been put into service. Here, the concern is that the service environment may have changed the structure, indepent of whether the problems originated during the initial constructio ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=851372

383. Formation of Solid Electrolyte Interface on Cycled Lithium-Ion Battery Cathodes: Soft X-ray Absorption Study
Topic: Materials Science
Published: 5/3/2002
Authors: M Balasubramanian, James McBreen, Xiao-Qing Yang, H S Lee, A R Moodenbaugh, Daniel A Fischer, Ziwen Fu, D Abraham
Abstract: Lithium-ion batteries are promising candidates for hybrid electric vehicles (HEV). Batteries that exceed the requirements for HEV, as set by the Partnership for a New Generation of Vehicles (PNGV), have been designed and built. These batteries are ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=850681

384. Multiscale Modeling of Point Defects and Free Surfaces in Semi-Infinite Solids
Topic: Materials Science
Published: 2/4/2002
Author: Vinod K Tewary
Abstract: A Green's function method is described for multiscale modeling of point defectssuch as vacancies and interstitials at the atomistic level and extended defects such as free surfaces and interfaces at the macroscopic continuum level in a solid. The po ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=851258

385. Effective Hamiltonian Study of PZT 95/5
Topic: Materials Science
Published: 1/21/2002
Authors: K Leung, Eric J Cockayne, A F Wright
Abstract: An effective Hamiltonian is constructed for PbZr0.95Ti0.05O3. It is parameterized using ab initio results computed in the virtual crystal approximation. The phase diagram depends sensitively on the energetic competition between the stable orthorhomb ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=850560

386. Comments on a Recent Infinitesimal-Deformation Approach to Martensite Crystallography
Topic: Materials Science
Published: 1/1/2002
Authors: H M Ledbetter, Martin Dunn
Abstract: We dispute recent claims by Navruz that his infinitesimal-deformation theory gives better predictions than the classical Wechsier-Lieberman-Read/Bowles-Mackenzie invariant-plane-strain theories. Indeed, we argue that the Navruz theory gives habit pl ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=851203

387. Survey of FY 2001 Nanotechnology-Related Research at the National Institute of Standards and Technology.
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 6864
Topic: Materials Science
Published: 1/1/2002
Authors: Chad R Snyder, J P. Looney, M P Casassa
http://nist.gov/manuscript-publication-search.cfm?pub_id=853823

388. Crystallographic Texture in Ceramics and Metals
Series: Journal of Research (NIST JRES)
Topic: Materials Science
Published: 12/1/2001
Author: Mark D Vaudin
Abstract: Preferred crystallographic orientation, or texture, occurs almost universally, both in natural and man-made systems. Many components and devices in electronic and magnetic systems are fabricated from materials that have crystallographic texture. The ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=850558

389. Estimation of Process Stability in the MAG Welding Process by Monitoring the Welding Parameters
Topic: Materials Science
Published: 11/1/2001
Author: Thomas Allen Siewert
Abstract: This paper presents the distribution of the main welding parameters (welding voltage and welding current) for semiautomatic arc welding with the metal active gas (MAG) process, using both flux- cored and solid electrodes. Two different shielding fas ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=851229

390. NIST Recommended Practice Guide: The Use of Nomenclature in Dispersion Science and Technology
Series: Special Publication (NIST SP)
Report Number: 960-3
Topic: Materials Science
Published: 8/1/2001
Authors: Vincent A Hackley, Chiara F Ferraris
Abstract: This Special Publication is essentially a reprint of two NIST Special Publications, SP 945 and SP 946. This particular Practice Guide provides guidelines for the use of technical and scientific nomenclature related to ceramic dispersions.The use of n ...
http://nist.gov/manuscript-publication-search.cfm?pub_id=850489