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Topic Area: Materials Science

Displaying records 401 to 410 of 523 records.
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401. Depletion of grain-boundary phase and elastic creep deformation upon ultra-long flexural stress rupture experiments of NC-132 silicon nitride
Topic: Materials Science
Published: 4/18/2007
Authors: H J Kleebe, W Braue, George David Quinn
Abstract: Two MgO-doped Si3N4 specimens (Norton, NC-132) were tested in ultra-long flexure stress rupture experiments with an external load of 266 MPa, i.e., 14.941 and 17.376 hours. Following mechanical testing, the materials were characterized by transmissi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850955

402. Elastic constants and internal friction of martensitic steel, ferritic-pearlitic steel, and {alpha}-iron
Topic: Materials Science
Published: 4/15/2007
Authors: Sudook A Kim, Ward L Johnson
Abstract: The elastic constants and internal friction of induction hardened and unhardened SAE 1050 plain-carbon steel were determined by acoustic resonance spectroscopy. The hardened specimen contained only martensite and the unhardened specimen was ferrite-p ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50255

403. X-Ray Standing Wave Analysis of Overlayer Induced Substrate Relaxation: The Clean and Bi-covered (110) GaP Surface
Topic: Materials Science
Published: 4/1/2007
Authors: A Herrera-Gomez, Joseph C Woicik, T Kendelewicz, K E Miyano, W E Spicer
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854331

404. Phase Equilibria of BaO-R^d2^O^d3^-CuO^dz^ Systems (R=Y and Lanthanides) Under CO^d2^-Free Conditions
Topic: Materials Science
Published: 3/13/2007
Authors: Winnie K Wong-Ng, Z Yang, Lawrence P. Cook, Julia Frank, Mario Loung, Qingzhen Huang
Abstract: For applications of phase equilibria to the processing of second-generation high Tc superconductor-coated-conductors, phase diagrams constructed under carbonate-free conditions are needed. Subsolidus phase equilibria of BaO-R2O3-CuOz (R=Ho) have bee ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851014

405. Influence of Oxygen Vacancies on the Dielectric Properties of Hafnia
Topic: Materials Science
Published: 3/1/2007
Author: Eric J Cockayne
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854316

406. Pyrochlore Formation, Phase Relations, and Properties in the CaO-TiO2-(Nb,Ta)2O5 Systems
Topic: Materials Science
Published: 3/1/2007
Authors: Terrell A Vanderah, Robert S. Roth, Ian E. Grey, W G Mumme, P Bordet, J C Ninod
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854394

407. Interrogation of 'Surface', 'Skin' and 'Core' Orientation in Thermotropic Liquid-Crystalline Copolyester Moldings by Near-Edge X-Ray Absorption Fine Structure and Wide-Angle X-Ray Scattering
Topic: Materials Science
Published: 2/26/2007
Authors: S Rendon, Robert A Bubeck, L S Thomas, W R Burghardt, A Hexemer, Daniel A Fischer
Abstract: Injection molding of thermotropic liquid-crystalline polymers (TLCPs) can result in molded articles the exhibit complex orientation states that vary considerably as a function of depth in the part. Skin-core morphologies are often observed in TLCP ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=851047

408. Local Structure of Displacively-Disordered Pyrochlore Dielectrics
Topic: Materials Science
Published: 2/20/2007
Authors: Victor Lvovich Krayzman, Joseph C Woicik
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854320

409. Effects of Vacancies on Properties of Relaxor Ferroelectrics: A First-Principles Study
Topic: Materials Science
Published: 2/13/2007
Authors: L Bellaiche, Jorge Iniguez, Eric J Cockayne, Benjamin P Burton
Abstract: A first-principles-based model is developed to investigate the influence of lead vacancies on the properties of relaxor ferroelectric Pb(Sc1/2Nb1/2)O3 (PSN). Lead vacancies generate large, inhomogeneous, electric fields that reduce barriers between ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850976

410. Mechanically Robust Spin-On Organosilicates Glasses for Nanoporous Applications
Topic: Materials Science
Published: 2/7/2007
Authors: Hyun W. Ro, K Char, Eun-Chae Jeon, H C Kim, Dongil Kwon, Hae-Jeong Lee, J. H. Lee, Hee-Woo Rhee, Christopher L Soles, Do Y. Yoon
Abstract: An increasing number of technologies demand nanoporous materials with vastly improved physical, mechanical and thermal properties. This manuscript develops the microstructural basis for synthesizing organosilicate glasses (OSGs) with unprecedented ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=852621



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