Persistent Link:
http://hdl.handle.net/10150/288738
Title:
Simulations of binary alloy solidification
Author:
Beatty, Kirk Matthew, 1962-
Issue Date:
1997
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
Jackson, Gilmer and Temkin used a Spin-1 kinetic Ising model to simulate non-equilibrium binary alloy solidification. In this dissertation the detailed relationship of this model to the solidification of binary alloys is reported. The phase transformation kinetics of the model is investigated as a function of growth rate, surface roughness, liquid diffusivity, equilibrium segregation coefficient, entropy of fusion, and composition of the liquid. Simulations for pure silicon predict a growth rate dependence on orientation and undercooling in accord with experimental results. Simulation results for the binary material show an increase in the non-equilibrium segregation coefficient (k(neq)) with surface smoothness, growth velocity and decreasing liquid diffusivity. Simulations for the orientation and growth velocity dependence of the segregation coefficient are in accord for experimental results for the solidification of bismuth doped silicon due to Aziz et al. Simulation results on the dependence of k(neq) on the equilibrium segregation coefficient, k(eq) are also consistent with experiment. The non-equilibrium segregation coefficient was found to increase with concentration of the liquid, but the effect is small at low concentrations.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Engineering, Materials Science.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Materials Science and Engineering
Degree Grantor:
University of Arizona
Advisor:
Jackson, Kenneth A.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleSimulations of binary alloy solidificationen_US
dc.creatorBeatty, Kirk Matthew, 1962-en_US
dc.contributor.authorBeatty, Kirk Matthew, 1962-en_US
dc.date.issued1997en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractJackson, Gilmer and Temkin used a Spin-1 kinetic Ising model to simulate non-equilibrium binary alloy solidification. In this dissertation the detailed relationship of this model to the solidification of binary alloys is reported. The phase transformation kinetics of the model is investigated as a function of growth rate, surface roughness, liquid diffusivity, equilibrium segregation coefficient, entropy of fusion, and composition of the liquid. Simulations for pure silicon predict a growth rate dependence on orientation and undercooling in accord with experimental results. Simulation results for the binary material show an increase in the non-equilibrium segregation coefficient (k(neq)) with surface smoothness, growth velocity and decreasing liquid diffusivity. Simulations for the orientation and growth velocity dependence of the segregation coefficient are in accord for experimental results for the solidification of bismuth doped silicon due to Aziz et al. Simulation results on the dependence of k(neq) on the equilibrium segregation coefficient, k(eq) are also consistent with experiment. The non-equilibrium segregation coefficient was found to increase with concentration of the liquid, but the effect is small at low concentrations.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectEngineering, Materials Science.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineMaterials Science and Engineeringen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorJackson, Kenneth A.en_US
dc.identifier.proquest9806853en_US
dc.identifier.bibrecord.b37563804en_US
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