Dynamics of bridgman-stockbarger growth of non-dilute binary alloys

E. D. Bourret; J. J. Derby; R. A. Brown

doi:10.1016/0022-0248(85)90365-3

Dynamics of bridgman-stockbarger growth of non-dilute binary alloys

E. D. Bourret, J. J. Derby, R. A. Brown

Chemical Engineering and Materials Science

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17 Scopus citations

Abstract

The coupling between heat and mass transfer in the Bridgman-Stockbarger growth of non-dilute crystals induces growth rate transients that are longer than those caused by heat transfer alone. The dynamics of the diffusion-controlled growth for thermophysical properties representative of Pb_1-xSn_xTe and Hg_1-xCd_xTe are computed from a one-dimensional solidification model which includes melt-crystal phase behavior. Results show that the growth rate response to a step change in pull rate for both systems differs from the exponential decay observed for dilute alloys and that growth rates cannot be inferred from axial segregation data in non-dilute systems due to the dependence of the segregation coefficient on composition.

Original language	English (US)
Pages (from-to)	587-596
Number of pages	10
Journal	Journal of Crystal Growth
Volume	71
Issue number	3
DOIs	https://doi.org/10.1016/0022-0248(85)90365-3
State	Published - 1985

Bibliographical note

Funding Information:
This research was supported by a grant from the Microgravity Sciences Program of the US National Aeronautic and Space Administration (Ref. No. NSG-7645).

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title = "Dynamics of bridgman-stockbarger growth of non-dilute binary alloys",

abstract = "The coupling between heat and mass transfer in the Bridgman-Stockbarger growth of non-dilute crystals induces growth rate transients that are longer than those caused by heat transfer alone. The dynamics of the diffusion-controlled growth for thermophysical properties representative of Pb1-xSnxTe and Hg1-xCdxTe are computed from a one-dimensional solidification model which includes melt-crystal phase behavior. Results show that the growth rate response to a step change in pull rate for both systems differs from the exponential decay observed for dilute alloys and that growth rates cannot be inferred from axial segregation data in non-dilute systems due to the dependence of the segregation coefficient on composition.",

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AB - The coupling between heat and mass transfer in the Bridgman-Stockbarger growth of non-dilute crystals induces growth rate transients that are longer than those caused by heat transfer alone. The dynamics of the diffusion-controlled growth for thermophysical properties representative of Pb1-xSnxTe and Hg1-xCdxTe are computed from a one-dimensional solidification model which includes melt-crystal phase behavior. Results show that the growth rate response to a step change in pull rate for both systems differs from the exponential decay observed for dilute alloys and that growth rates cannot be inferred from axial segregation data in non-dilute systems due to the dependence of the segregation coefficient on composition.

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Dynamics of bridgman-stockbarger growth of non-dilute binary alloys

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