Kinetics of gas-to-liquid and liquid-to-solid transfer of particles in metal-matrix compositesAnalytical 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.
Document ID
19910070261
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
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)