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Displaying 1201 - 1225 of 1721

Glass-Fiber/Resin Interfacial Strength the Microbond Test and Chemical Evaluation

January 1, 2003
Author(s)
Walter G. McDonough, Joseph M. Antonucci, Joy Dunkers, Gary E. Schumacher
The quest for durable, aesthetic and bondable materials that can restore both the function and appearance of lost tooth structure has been a major concern for dental materials researchers. A significant advance, which ushered in the modern era of

Machining Damage Cracks: How to Find and Characterize Them by Fractography

January 1, 2003
Author(s)
George D. Quinn, L K. Ives, S Jahanmir
Subsurface machining cracks may control strength and performance of finished ceramics. Previously, machining cracks had been though to be difficult or impossible to detect and characterize, especially in toughened ceramics with interlocking grain

MALDI of Structured Polymer Particles

January 1, 2003
Author(s)
Barry J. Bauer, Kathleen M. Flynn
A layered preparation method is introduced that produces structured MALDI targets with well-defined phase sizes and compositions. Tri-a-naphthyl benzene is a glassy matrix that forms smooth films. It is layered with polystyrenes or polyethylene glycol

Measuring the Mechanical Properties of a Thin Polymeric Film by AFM

January 1, 2003
Author(s)
P M. McGuiggan, D J. Yarusso
The atomic force microscope is used to measure the tan delta (loss modulus/storate modulus) of a thin film of poly(n-butylacrylate) as a function of frequency. The AFM results are in good agreement with indenter measurements. The results demonstrate that

Mechanical Testing for Ceramics

January 1, 2003
Author(s)
George D. Quinn
This article describes (briefly) the common tests used for strength testing of ceramics.

Oxidative DNA Damage Biomarkers Used in Tissue Engineered Skin

January 1, 2003
Author(s)
H Rodriguez, Pawel Jaruga, M Birincioglu, Peter E. Barker, C D. O'Connell, M. Dizdaroglu
To assure that tissue engineered medical products are free of genetic changes that might occur from inflammation during the development phase of the product, our laboratory is responding to the need for test methods used to assess the safety and

Recent Developments in the Characterization of Anisotropic Void Populations in Thermal Barrier Coatings Using Ultra-Small Angle X-ray Scattering

January 1, 2003
Author(s)
Gabrielle G. Long, T A. Dobbins, Andrew J. Allen, J Ilavsky, P Jemain, A Kulkarni, H Herman
Thermal barrier coatings (TBC) have complex void microstructures which control their in service properties. In the research reported here, ultra-small-angle X-ray scattering (USAXS) has been used to characterize anisotropic void populations in TBC s. A new

The Local Structure of Antimony in High Dose Antimony Implants in Silicon by XAFS and SIMS

January 1, 2003
Author(s)
M A. Sahiner, S W. Novak, Joseph Woicik, Y. Takamura, P B. Griffin, J D. Plummer
One of the important challenges in semiconductor industry is to sustain high concentration of dopant atoms electronically active in very small areas. In investigating the optimum post implantation treatment methods that will help to attain these conditions

Wear in Boundary Lubrication

January 1, 2003
Author(s)
Stephen M. Hsu, R G. Munro, M C. Shen
Wear studies under lubricated conditions can be classified into two nominally distinct categories: investigations of thewear mechanisms active within the material, and studies of the degradation mechanisms active within the lubricant. Thetwo categories

Wear of Hydroxyapatite Sliding Against Glass-Infiltrated Alumina

January 1, 2003
Author(s)
Sergei Kalinin, B Hockey, S Jahanmir
The present work reports on the processes involved in the wear of hydroxyapatite sliding against slip-cast, glass-infiltrated alumina. Synthetic hydroxyapatite is used as a model material representing tooth enamel, while the alumina that was used is

Wear Transitions and Tribochemical Reactions in Ceramics

January 1, 2003
Author(s)
S Jahanmir
Structural ceramics are used in diverse tribological applications due to their unique properties that include resistance to abrasion and erosion, resistance to corrosive wear, wear resistance at elevated temperatures, low density, and unique electrical
Displaying 1201 - 1225 of 1721