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Displaying records 931 to 940 of 1000 records.
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931. Lateral Force Microscope Calibration Using a Modified AFM Cantilever
Topic: Ceramics
Published: Date unknown
Author: Mark Reitsma
Abstract: A proof-of-concept study is presented for a new force transducer and associated calibration method that provides a path for quantitative friction measurements using a Lateral Force Microscope. The transducer design is an Atomic Force Microscope (AFM) ...

932. Layer Perfection in Ultrathin, MOVPE-Grown InAs Layers Buried in GaAs(001) Studied by X-Ray Standing Wave and Photoluminescence Spectroscopy
Topic: Ceramics
Published: Date unknown
Authors: J A Gupta, Joseph C Woicik, S P Watkins, D A Harrison, E D Crozier, B A Karlin
Abstract: Using the In-L fluorescence produced by normal-incidence X-ray standing waves, we have measured the layer perfection and positions for ML = 1 and 1/2 (where ML = # of mono layers) InAs quantum wells buried in GaAs(001). Growth temperature effects we ...

933. Lifetime Prediction for Silicon Nitride
Topic: Ceramics
Published: Date unknown
Author: Sheldon Martin Wiederhorn
Abstract: This paper reviews lifetime prediction methodologies for high-temperature structural ceramics. The methodologies consider failure from subcritical crack growth at low temperatures, 800 C to 1000 C, and creep, or creep-rupture at high temperatures. ...

934. Low Temperature Compaction of Nanosize Powders
Topic: Ceramics
Published: Date unknown
Authors: E J Gonzalez, Gasper J. Piermarini
Abstract: In recent years there has been a strong interest in the processing of nanosize ceramic powders because of the potential of sintering them at low temperatures and also because ceramic pieces made of nanosize gram structures may exhibit superior mechan ...

935. Low-Thermal-Conductivity Plasma-Sprayed Thermal Barrier Coatings With Engineered Microstructures
Topic: Ceramics
Published: Date unknown
Authors: Amol Jadhav, N P Padture, Eric Jordan, Maurice Gell, Pilar Miranzo, Lin-Sien H Lum
Abstract: The solution precursor plasma spray (SPPS) process has been used to deposit ZrO2-7wt%Y2O3 (7YSZ) thermal barrier coatings (TBCs) that contain alternate layers of low and high porosities (layered-SPPS). The thermal conductivity of the layered-SPPS coa ...

936. Material Properties of a Sintered {alpha}-SiC
Topic: Ceramics
Published: Date unknown
Author: R G Munro
Abstract: A self-consistent, single-valued representation of the major physical, mechanical, and thermal properties of a sintered {Alpha}-SiC is presented. This comprehensive set of properties is achieved by focusing on a narrowly defined material specificati ...

937. Materials Design for Biomechanical Layer Structures
Topic: Ceramics
Published: Date unknown
Authors: Brian Ronald Lawn, Antonia Pajares, P Miranda, Y N Deng
Abstract: A survey of recent advances in the analysis of ceramic-based layer structures for biomechanial applications is presented. Data on model layer systems, facilitating development of explicit fracture mechanics relations for predicting critical loads to ...

938. Measurement Methods for Materials Properties: Elasticity
Topic: Ceramics
Published: Date unknown
Authors: Sheldon Martin Wiederhorn, Richard Joel Fields
Abstract: Elastic constants must be obtained by experiment methods. Materials are too complicated and theory of solids insufficiently sophisticated to obtain accurate theoretic determinations of elastic constants. Usually, simple static mechanical tests are u ...

939. Measuring the Five Parameter Grain Boundary Distribution From Observations of Planar Sections
Topic: Ceramics
Published: Date unknown
Authors: D M. Saylor, B S El-Dasher, B L Adams, G S Rohrer
Abstract: A stereological method is described for estimating the distribution of grain boundary types in polycrystalline materials over the five macroscopically observable parameters on the basis of observations from a single planar section. The grain boundar ...

940. Measuring the Size Dependence of Young s Modulus Using Force Modulation Atomic Force Microscopy
Topic: Ceramics
Published: Date unknown
Authors: William J Price, C. Leighton, Stephen M. Hsu, Timothy Patten, Gang-Yu Liu
Abstract: The question of whether the Young s modulus of organic thin films depends on the size of the materials at the nanometer scale is systematically investigated. Using atomic force microscopy (AFM) based imaging and lithography, nanostructures with desi ...

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