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Displaying records 371 to 380 of 424 records.
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371. Phase Formation, Crystal Chemistry, and Properties in the Magnetic Dielectric System Bi^d2^O^d3-^Fe^d2^O^d3-^Nb^d2^O^d5^
Topic: Materials Science
Published: 6/22/2006
Authors: M W Lufaso, Terrell A Vanderah, I M Pazos, Igor Levin, Juan C Nino, Virgil Provenzano, Peter K. Schenck, Robert S. Roth
Abstract: Subsolidus phase relations have been determined for the Bi2O3-Fe2O3-Nb2O5 system in air (900-1075 C). Three new ternary phases were observed Bi3Fe0.5Nb1.5O9 with an Aurivillius-type structure, and two phases with approximate stoichiometries Bi17Fe2 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850944

372. An Octagonal Architecture for High Strength PIT Nb^d3^Sn Conductors
Topic: Materials Science
Published: 6/6/2006
Authors: L. R. Motowidlo, E Barzi, D. Turrioni, Najib Cheggour, Loren Frederick Goodrich
Abstract: Powder-in-Tube (PIT) Nb^d3^Sn conductors have been fabricated utilizing a low-cost intermetallic Cu^d5^Sn^d4^ powder as the tin source. A novel octagonal PIT design that incorporates dispersion strengthened copper as well as a hexagonal PIT design w ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900875

373. Effect of Self-Assembled Monolayer Film Order on Nanofriction
Topic: Materials Science
Published: 5/11/2006
Authors: S Sambasivan, S Hsieh, Daniel A Fischer, Stephen M. Hsu
Abstract: Self-assembled monolayers (SAMs) have increasingly being explored as potential protective films in devices friction and adhesion. However, accurate determination of the nanomechanical properties of monolayer films is difficult and fraught with uncert ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850918

374. Anisotropic elastic properties of nanocrystalline nickel thin films
Topic: Materials Science
Published: 5/1/2006
Authors: Donna C. Hurley, Roy H. Geiss, N Jennett, Malgorzata Kopycinska-Mueller, A Maxwell, Jens Mueller, David Thomas Read, J Wright
Abstract: As length scales continue to shrink, new tools are needed to measure mechanical properties. We are developing two such tools using different nondestructive acoustical techniques. Surface acoustic wave spectroscopy (SAWS) uses laser-ultrasonic methods ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50050

375. Transverse Fracture of Brittle Bilayers Relevance to Failure of All-Ceramic Dental Crowns
Topic: Materials Science
Published: 3/1/2006
Authors: Jeonghwan Kim, Sanjit Bhowmick, Ilja Hermann, Brian Ronald Lawn
Abstract: A study is made of the behavior of cracks approaching interfaces in all-ceramic crown-like bilayers. Flat specimens are fabricated by fusing porcelain veneers onto Y-TZP and alumina core ceramic plates, with veneer/core matching to minimize residual ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850132

376. Comparison of the Fouling Release Properties of Hydrophobic Fluorinated and Hydrophilic PEGylated Block Copolymer Surfaces
Topic: Materials Science
Published: 1/19/2006
Authors: S Krishman, N Wang, Christopher K. Ober, J Finlay, M E Callow, J A Callow, A Hexemer, K E Sohn, E J Kramer, Daniel A Fischer
Abstract: To understand the role of surface-wettability on adhesion of cells, the attachment of two different marine algae was studied on hydrophobic and hydrophilic polymer surfaces. Adhesion of cells of the diatom Navicula and sporelings (young plants) of th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=850971

377. Comparative Phase Equilibria in the Bi2O3-MOx-Nb2O5 Systems (MOx=Mn2O3, Fe2O3, Co3O4, ZnO)
Topic: Materials Science
Published: 11/23/2005
Authors: Terrell A Vanderah, M W. Lufaso, A U Adler, I M Pazos, S M Bell
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854183

378. Zeroing in on a Lead-Free Solder Database
Topic: Materials Science
Published: 10/1/2005
Authors: Thomas A. (Thomas A.) Siewert, David R. Smith
Abstract: The rising interest in lead-free solders creates a need for complete property data on the various lead-free solder compositions. Circuit designers need these data to assess the impact of the transition on product life, and production engineers need t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=50183

379. Impedance and Nonlinear Dielectric Testing at High AC Voltages Using Waveforms
Topic: Materials Science
Published: 8/15/2005
Authors: Jan Obrzut, K Kano
Abstract: This paper presents the application of a waveform technique that can determine the complex impedance and nonlinear response of dielectric composite films at high ac voltages using a data acquisition (DAQ) card and virtual instrumentation. The voltag ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903662

380. An Unexpected Crystal-Chemical Principle for the Pyrochlore Structure
Topic: Materials Science
Published: 7/18/2005
Authors: Terrell A Vanderah, M W. Lufaso
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=854249



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