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Displaying 1126 - 1150 of 1721

High-Throughput Measurements of Polymer Adhesion and Mechanical Properties

September 1, 2003
Author(s)
Christopher Stafford, Aaron M. Forster, C Harrison, Cher H. Davis, Eric J. Amis, Alamgir Karim
Polymer adhesion is important to numerous technologies including electronic packaging, coatings and paints, biomedical implants, and pressure-sensitive adhesives. The challenge is to understand the fundamental driving forces for the development of adhesive

Influence of Roughness on Wear Transition in Glass-Infiltrated Alumina

September 1, 2003
Author(s)
Sergei Kalinin, S Jahanmir
The wear behavior of glass-infiltrated alumina was evaluated in sliding against a high purity alumina in water using a pin on disk tribometer. Three disk surface roughness values were used, i.e., 14 nm, 146 nm and 649 nm Ra. The wear rate of both the

Thermal Degradation of Marble: Indications From Finite-Element Modelling

September 1, 2003
Author(s)
T Weiss, S Siegesmund, Lin-Sien H. Lum
Microstructure-based finite element simulations were used to study theThermo-mechanical behavior of calcite marbles. Give the same microstructure, a strongly textured marble had smaller elastic strain energy and a distinct directional dependence of thermal

Ultra-High Molecular Weight Polyethylene Wear Particle Effects on Bioactivity

September 1, 2003
Author(s)
H. W. Fang, Stephen M. Hsu, J V. Sengers
Ultra-high molecular weight polyethylene (UHMWPE) wear particles have been recognized as one of the major causes of aseptic loosening in total joint replacements. Macrophage phagocytosis of wear particles induces human biological/physiological responses

Machining Cracks Revealed by Fractography

August 28, 2003
Author(s)
George D. Quinn, L K. Ives, S Jahanmir
Fractography detected and characterized the nature and size of strength limiting rods and bars in a sintered reaction bonder silicon nitride that was ground by a variety of procedures.

Designing Damage-Resistant Brittle-Coating Structures: I. Bilayers

August 1, 2003
Author(s)
P Miranda, Antonia Pajares, F Guiberteau, Y N. Deng, Brian R. Lawn
A FEA study of coating/substrate bilayers is conducted as a foundation for damage analysis. Attention is focused on the stresses along the contact axis immediately adjacent to the bilayer interface, where radial cracking or yield in the coating, or yield

Designing Damage-Resistant Brittle-Coating Structures: II. Trilayers

August 1, 2003
Author(s)
P Miranda, Antonia Pajares, F Guiberteau, Y N. Deng, H Zhao, Brian R. Lawn
An extension of the FEA-based damage analysis for bilayers in Part I is presented for trilayers consisting of a functional outer layer on an underlying substrate with an intermediate inner core layer. The inner core layer may be used to enhance bonding or

Ceramics Lubrication

July 1, 2003
Author(s)
Stephen M. Hsu, Richard S. Gates, D E. Deckman
ramics are hard, brittle, and chemically inert under most environments. They wear by abrasion and fracture. Since brittle fracture is very sensitive to stress intensity factors, ceramic wear is dominated by stress intensity at various scales. Under mild

Characterization of Chinese Ink in Size and Surface

July 1, 2003
Author(s)
J R. Swider, Vincent A. Hackley, J Winter
Chinese lnk, a mixture of soot and animal glue, has been used in East Asia for centuries as the sole black paint of choice. The combination of animal glue and soot particles creates a distinctive dispersion system giving Chinese Ink its unique properties

Energetics of Li Atom Displacements in K1-xLixTa03: First-Principles Calculations

July 1, 2003
Author(s)
S A. Prosandeev, Eric J. Cockayne, Benjamin P. Burton
K 1-xLi xTaO 3 (KLT) solid solutions exhibit a variety of interesting physical phenomena related to large local displacements of Li-ions from ideal perovskite A-site positions. First-principles calculations for KLT supercells were used to investigate these

Data Evaluation Theory and Practice for Materials Properties

June 26, 2003
Author(s)
R G. Munro
Data evaluation is the process by which collections of data are assessed with respect to reliability, completeness, and consistency. The present work addresses data evaluation for materials properties as a scientific discipline that evolves from the formal

Comparative Studies of MgB 2 /Mg Nano-Composites and Press-Sintered MgB 2 Pellets

June 1, 2003
Author(s)
Q Li, L Wu, Y Zhu, A R. Moodenbaugh, G Gu, M Suenaga, Z X. Ye, Daniel A. Fischer
We present our studies of superconducting and microstructural properties of bulk MgB 2/Mg nano-composites and press-sintered MgB 2. TEM investigation revealed that the composites are very dense, consisting of nano-sized MgB 2 grains connected by the well
Displaying 1126 - 1150 of 1721