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Topic Area: Materials Science

Displaying records 301 to 310 of 520 records.
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301. A Combined Fit of Total Scattering and Extended X-ray Absorption Fine Structure Data for Local-Structure Determination in Crystalline Materials
Topic: Materials Science
Published: 10/5/2009
Authors: Igor Levin, Victor Lvovich Krayzman, Joseph C Woicik, Terrell A Vanderah, M. G. Tucker, Thomas Proffen
Abstract: Reverse Monte Carlo (RMC) refinements of local structure using a simultaneous fit of x-ray/neutron total scattering and EXAFS data were developed to incorporate an explicit treatment of both single- and multiple-scattering contributions to EXAFS. T ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902352

302. A Novel Method to Covalently Functionalize Carbon Nanotubes with Isocyanates
Topic: Materials Science
Published: 9/30/2009
Authors: Tinh Nguyen, Aline Granier, Kristen L Steffens, Hajin Lee, Naomi Eidelman, Jonathan W. Martin
Abstract: We have developed a novel method to covalently functionalize carbon nanotubes (CNTs) that carry free isocyanate (N=C=O) groups. NCO-functionalized CNTs (NCO-fCNTs) are very desirable, because the NCO group is highly reactive with hydrogen-active grou ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903766

303. Development of Soft Armor Conditioning Protocols for NIJ 0101.06: Analytical Results
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7627
Topic: Materials Science
Published: 9/24/2009
Authors: Amanda Lattam Forster, Kirk D Rice, Michael A Riley, Guillaume Messin, Sylvain H. Petit, Cyril Clerici, Gale Antrus Holmes, Joannie W Chin
Abstract: This publication details the four major phases of analytical development work, coupled with several additional side studies, undertaken by the Office of Law Enforcement Standards in writing the Flexible Armor Conditioning Protocol in NIJ 0101.06. Th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902601

304. A Coherent Approach for Interrogating Polybenzoxazole Fibers for Residual Phosphoric Acid
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7573
Topic: Materials Science
Published: 9/17/2009
Authors: Gale Antrus Holmes, Eun S. Park, Charles Martin Guttman, Kathleen M. Flynn, John R Sieber, Stephanie S Watson, Kirk D Rice
Abstract: Because of the premature failure of soft-body armor that contains the active fiber poly [(benzo-[1,2-d:5,4-d‰]-benzoxazole-2,6-diyl)-1,4-phenylene] (PBO), the Office of Law Enforcement Standards (OLES) at the National Institute of Standards and Techn ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902057

305. MORPHOLOGY AND FRACTURE OF ENAMEL
Topic: Materials Science
Published: 9/16/2009
Authors: Sang-Won Myoung, James J. Lee, Paul Constantino, Peter Lucas, Brian Ronald Lawn
Abstract: Teeth are remarkable biological structures, brittle but resilient. Here we examine the inter-relation between enamel morphology and crack resistance by sectioning human molar teeth after loading to fracture. The sections reveal that many cracks s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901535

306. An electrical pulse-heated Kosky bar technique for high strain rate flow stress measurements of rapidly heated metals
Topic: Materials Science
Published: 9/13/2009
Authors: Steven P Mates, Stephen W Banovic, Richard L. Rhorer, Timothy J Burns, Eric Paul Whitenton, D Basak
Abstract: We have developed a unique electrical pulse-heated Kolsky Bar technique for measuring the flow stress of metals at heating rates of up to 6000 °C per second and strain rates up to 10^4 per second. Under these conditions, which are approaching those f ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901787

307. A Practical and Systematic Review of Weibull Statistics for Reporting Strengths of Dental Materials
Topic: Materials Science
Published: 9/11/2009
Authors: Janet Quinn, George David Quinn
Abstract: Objective: To review the history, theory and current applications of Weibull analysis sufficient to make informed decisions regarding practical use of the analysis in dental material strength testing. Data: References are made to examples in the eng ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901550

308. Condensed Matter Astrophysics A Prescription for Determining the Species-Specific Composition and Quantity of Interstellar Dust using X-rays
Topic: Materials Science
Published: 9/10/2009
Authors: Bruce D Ravel, Julia C. Lee, Jingen Xiang, Jeffrey Kortright, Kathryn Flanagan
Abstract: We present a new technique for determining the quantity and composition of dust in astrophysical environments using < 6 keV X-rays. We argue that high resolution X-ray spectra as enabled by the Chandra and XMM-Newton gratings should be considered ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903572

309. Studying Long-term Performance of a Nano-ZnO filled Waterborne Polyurethane Coating using Spectroscopies and Microscopies
Topic: Materials Science
Published: 9/9/2009
Authors: Xiaohong Gu, Dongmei Zhe, Stephanie S Watson, Guodong Chen, Minhua Zhao, Paul E Stutzman, Deborah L Stanley, Tinh Nguyen, Joannie W Chin, Jonathan W. Martin
Abstract: Although inorganic UV absorbers such as zinc oxide (ZnO) and cerium oxide (CeO2) exhibit numerous advantages compared to organic UV absorbers, the mechanisms of how these nanoparticles affect the long-term performance of polymeric coatings are less t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903215

310. Elastic Modulus of Amorphous Polymer Thin Films: Relationship to the Glass Transition Temperature
Topic: Materials Science
Published: 8/24/2009
Authors: Jessica M. Torres, Christopher M Stafford, Bryan D. Vogt
Abstract: Understanding the mechanical properties of polymers at the nanoscale is critical in numerous emerging applications. While it has been widely shown that the Tg in thin polymer films decreases due to confinement effects, there is little known about th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902430



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