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Displaying 1101 - 1125 of 1322

Abstracts for the MSEL Assessment Panel, March 2001

January 26, 2001
Author(s)
Leslie E. Smith, Alamgir Karim, Leonid A. Bendersky, C Lu, J J. Scott, Ichiro Takeuchi, Kathleen M. Flynn, Vinod K. Tewary, Davor Balzar, G A. Alers, Stephen E. Russek, Charles C. Han, Haonan Wang, William E. Wallace, Daniel A. Fischer, K Efimenko, Wen-Li Wu, Jan Genzer, Joseph C. Woicik, Thomas H. Gnaeupel-Herold, Henry J. Prask, Charles F. Majkrzak, Norman F. Berk, John G. Barker, Charles J. Glinka, Eric K. Lin, Ward L. Johnson, Paul R. Heyliger, David T. Read, R R. Keller, J Blendell, Grady S. White, Lin-Sien H. Lum, Eric J. Cockayne, Igor Levin, C E. Johnson, Maureen E. Williams, Gery R. Stafford, William J. Boettinger, Kil-Won Moon, Daniel Josell, Daniel Wheeler, Thomas P. Moffat, W H. Huber, Lee J. Richter, Clayton S. Yang, Robert D. Shull, R A. Fry, Robert D. McMichael, William F. Egelhoff Jr., Ursula R. Kattner, James A. Warren, Jonathan E. Guyer, Steven P. Mates, Stephen D. Ridder, Frank S. Biancaniello, D Basak, Jon C. Geist, Kalman D. Migler
Abstracts relating to research and development in the NIST Materials Science and Engineering Laboratory (MSEL) are presented for a poster session to be presented to the 2001 MSEL Assessment Panel.

Ceramics Division FY 2000 Programs and Accomplishments

January 1, 2001
Author(s)
Stephen W. Freiman, S J. Dapkunas
The mission of the Ceramics Division is: Work with industry, standards bodies, academia, and other government agencies in providing the leadership for the Nation's measurements and standards infrastructure for ceramic materials. The range of ceramic

Contact Fracture of Brittle Bilayer Coatings on Soft Substrates

January 1, 2001
Author(s)
P Miranda, Antonia Pajares, F Guiberteau, F Cumbrera, Brian R. Lawn
Contact-induced fracture modes in trilayers consisting of a brittle bilayer coating on a soft substrate was investigated. Experiments are performed on model transparent glass/sapphire/polycarbonate structures bonded with epoxy adhesive, to enable in situ

Damage Evolution During Microcracking of Brittle Solids

January 1, 2001
Author(s)
A Zimmermann, W Carter, Lin-Sien H. Lum
Microcracking due to thermal expansion anisotropy is considered based on a finite element model. A polycrystalline microstructure is generated via Monte Carlo simulation. Microcrack formation is investigated using a Griffith-type failure criterion. The

Domain Stability in PZT Thin Films

January 1, 2001
Author(s)
Grady S. White, J Blendell, Lin-Sien H. Lum
M measurements were made on textured PZT thin films excited by a 1 V rms in the presence of various DC biasing voltages. Apparent domain pinning sites were found in the films. All sites were located at grain boundaries and were coincident with abnormally

Guide to Rheological Nomenclature: Measurement in Ceramic Particulate Systems

January 1, 2001
Author(s)
Vincent A. Hackley, Chiara F. Ferraris
This document provides definitions of terms and expressions relating to the measurement of rheological properties in liquid-based ceramic particulate systems (i.e., suspensions, pastes, and gels). The definitions are largely generic and should be

Influence of Crack Path on Crack Resistance of Brittle Matrix Composites

January 1, 2001
Author(s)
S Wu, D Patterson, M Ferber, Lin-Sien H. Lum
Studies on particulate reinforced ceramic composites, mainly glass/Al 2O 3, have shown pronounced crack path variations with variations in microstructure and loading rate. The variations in path strongly influenced the crack resistance of the composite

Misalignment-Induced Bending in Pin-Loaded Tensile-Creep Specimens

January 1, 2001
Author(s)
Ralph Krause, Sheldon M. Wiederhorn, J J. Kuebler
In this paper, we examined the possibility that elastic bending induced by load misalignment can affect creep measurements on pin-loaded tension specimens of silicon nitride(Si 3N 4). We have shown that elastic bending ato room temperature can be as great

Modeling Thermal Barrier Coatings with Object Oriented Finite Elements Methods

January 1, 2001
Author(s)
M R. Locatelli, Lin-Sien H. Lum
Thermal barrier coatings (TBC s) are used to protect metallic components from extreme conditions like those encountered in turbine engines. TBC s serve two purposes in these applications. They prevent the oxidation of the superalloy and create a thermal

Nano-Lubrication: Concept and Design

January 1, 2001
Author(s)
Stephen M. Hsu
The advent of micro-electromechanical devices (MEMs), sensors, actuators, microsystems, and nanotechnology have called to attention the effect of friction on moving parts in nano/microdevices. To take full advantage of the opportunity to sense, compute

NIST Recommended Practice Guide: Particle Size Characterization

January 1, 2001
Author(s)
Ajitkumar Jillavenkatesa, Lin-Sien H. Lum, Stanley Dapkunas
This guide is a compilation of essential facts and some fundamental information about commonly used techniques of particle size analysis in the ceramics industry. The guide is designed for the non- expert who may have some or little previous knowledge

Order-Disorder Phenomena and Phase Separation

January 1, 2001
Author(s)
Benjamin P. Burton
Order-disorder and phase separation in condensed solutions of two or more components are similar processes that are typically driven by energetics of opposite sign. The components may be: different atomic species in alloys or solid solutions; atoms and

Restabilization of Electrosterically Stabilized Colloids in High Salt Media

January 1, 2001
Author(s)
V S. Stenkamp, P M. McGuiggan, J C. Berg
For electrostatically stabilized colloids, an increase in salt concentration typically causes a decrease in stability, until the electrical double layer is collapsed, in which case the instability remains as salt concentration is increased further. In

Scaling Issues in the Measurement of Monolayer Films

January 1, 2001
Author(s)
Stephen M. Hsu, P M. McGuiggan, J Zhang, Y L. Wang, F Yin, Y P. Yeh, Richard S. Gates
An atomic force microscope (AFM), a surface forces apparatus (SFA), and a ball-on-inclined plane (BOIP) apparatus were used to measure the mechanical properties of thin films. The frictional force (lateral resistance) of a set of four samples with

Standards for Reliability Testing of Heavy Vehicle Propulsion Materials

January 1, 2001
Author(s)
S Jahanmir, James F. Kelly, William E. Luecke
The objective of this project is to develop international standard test methods for assessing the reliability of ceramic components used in diesel engines and other heavy vehicle propulsion systems. Advanced ceramics such as silicon nitride offer a unique
Displaying 1101 - 1125 of 1322
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