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Displaying 876 - 900 of 1322

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

Morphotropic Phase Boundary Perovskites, High Strain Piezoelectrics, and Dielectric Ceramics

June 18, 2003
Author(s)
R Guo, Winnie Wong-Ng, D Viehland, C M. Wu, K M. Nair, A S. Bhalla, D Suvorov, S I. Hirano
The content of this Ceramic Transactions volume comprises the proceedings of the Symposium on Dielectric Materials andMultilayer Electronic Devices and the Symposium on Morphotropic Phase Boundary Phenomena and Perovskite Materials,held April 28 - May 1

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

Fracture Toughness of Toughened Silicon Nitride by ASTM C 1421

June 1, 2003
Author(s)
George D. Quinn, J Swab, M J. Motyka
The fracture toughness of a commercial sintered reaction-bonded silicon nitride was measured by the three complementary test methods in ASTM C 1421. Precracks ranged from tiny artificial flaws introduced by Knoop indentation to millimeter long precracks in

Growth of superconducting single crystals

June 1, 2003
Author(s)
Debra L. Kaiser, L.F. Schneemeyer
This manuscript is a review of single crystal growth of high temperature superconducting materials. The introductory sections cover fundamentals of crystal growth with emphasis on special considerations for superconducting compounds, and the growth

Blazing a Trail

May 1, 2003
Author(s)
Peter K. Schenck, Debra L. Kaiser
In this paper we discuss the application of pulsed laser deposition (PLD) to combinatorial materials research on inorganic thin films. The modifications to an existing PLD apparatus converting it to a dual beam dual target PLD system for the production of

Comprehensive Microstructural Characterization and Predictive Property Modeling of Plasma-Sprayed Zirconia Coatings

May 1, 2003
Author(s)
A Kulkarni, Z G. Wang, T Nakamura, S Sampath, A N. Goland, H Herman, Andrew J. Allen, J Ilavsky, Gabrielle G. Long, J Frahm, R W. Steinbrech
Quantitative microstructure characterization to better understand processing-microstructure-property correlations is of considerable interest in plasma sprayed coating research. This paper quantifies, by means of small-angle neutron scattering (SANS) data

Comprehensive Microstructural Characterization and Predictive Property Modelling of Plasma-Sprayed Zirconia Coatings

May 1, 2003
Author(s)
A Kulkarni, Z G. Wang, T Nakamura, S Sampath, A N. Goland, Gabrielle G. Long, H Herman, J. Allen, J Ilavsky, G J. Long, J Frahm, R W. Steinbrech
hieving control of the microstructure of plasma-sprayed thermal-barrier coating (TBC) systems offers an opportunity to tailor coating properties to demanding applications. Accomplishing this requires a fundamental understanding of the correlations between

Near the Static Fatigue Limit in Glass

May 1, 2003
Author(s)
Sheldon M. Wiederhorn, A Dretzke, J Rodel
The atomic force microscope is used to explore the nature of fracture surfaces in soda lime silicate glass formed near or below the apparent crack growth threshold. Conventional theory suggests that cracks in glass will blunt when subjected to stresses

Conventional Cells - Monoclinic I-& C-Centered Cells

April 3, 2003
Author(s)
Alan D. Mighell
In the selection of a centered cell in the monoclinic system, it is recommended that the experimentalist select an I-centered cell for those cases in which it is the conventional cell- a and c are coincident with the shortest two translations in the net

A Model System for Interfacial Reactions in LTCC Materials

April 1, 2003
Author(s)
Lawrence P. Cook, Winnie K. Wong-Ng, Peter K. Schenck, Mark D. Vaudin, J Suh
Over the past decade, ceramic packaging materials have continued to increase in both chemical and structural complexity. At processing temperatures of 800 C to 900 C, the possibilities for interactions at interfaces between dissimilar materials are

A New Octahedral Tilt System in the Perovskite Phase Ca 3 Nb 2 O 8

April 1, 2003
Author(s)
L M. Cranswick, W G. Mumme, I E. Grey, Robert S. Roth, P Bordet
The perovskite-related phase Ca 3Nb 2O 8, when grown as single crystals from a calcium vanadate flux, incorporates a smallamount of vanadium from the flux to form the composition Ca 3Nb 2-xV xO 8 with x = 0.025 . The crystals have pseudo-cubicsymmetry with
Displaying 876 - 900 of 1322
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