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Record 1 of 25425
Kinetics of gas-to-liquid and liquid-to-solid transfer of particles in metal-matrix composites
Author and Affiliation:
Stefanescu, D. M.(Alabama Univ., Tuscaloosa, AL, United States)
Rana, F.(Alabama Univ., Tuscaloosa, AL, United States)
Moitra, A.(Alabama Univ., Tuscaloosa, AL, United States)
Kacar, S.(Alabama, University, Tuscaloosa, United States)
Abstract: Analytical models for transfer of particles from gas to liquid and from liquid to solid are introduced. The model for calculation of the pushing/engulfment transition in directionally solidified particulate metal matrix composites, considers process thermodynamics, process kinetics, thermophysical properties and buoyant forces. Based on processing variables (solidification velocity and direction) and on material variables (interface energies, particle size, particle and liquid density, volume fraction of particles and particle/liquid thermal conductivity ratio) four types of behavior were predicted. Also, two numerical models for liquid-to-solid transfer are discussed, as well as the limitations of presently available models.
Publication Date: Jan 01, 1990
Document ID:
19910070261
(Acquired Nov 28, 1995)
Accession Number: 91A54884
Subject Category: THERMODYNAMICS AND STATISTICAL PHYSICS
Document Type: Conference Paper
Publication Information: (SEE A91-54879)
Publisher Information: United States
Contract/Grant/Task Num: NAG8-70
Financial Sponsor: NASA; United States
Organization Source: Alabama Univ.; Tuscaloosa, AL, United States
Description: 13p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: KINETICS; METAL MATRIX COMPOSITES; PHASE TRANSFORMATIONS; POWDER (PARTICLES); THERMODYNAMIC PROPERTIES; ALUMINUM OXIDES; CONCENTRATION (COMPOSITION); CRYSTAL GROWTH; MATHEMATICAL MODELS; OXIDE FILMS; SILICON CARBIDES; TEMPERATURE DISTRIBUTION
Imprint And Other Notes: IN: Solidification of metal matrix composites; Proceedings of the Conference, Indianapolis, IN, Oct. 1-5, 1989 (A91-54879 23-24). Warrendale, PA, Minerals, Metals, and Materials Society, 1990, p. 77-89.
Availability Source: Other Sources
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