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Space Charge Contribution To Solute Segregation Near Grain Boundaries

Published online by Cambridge University Press:  15 February 2011

M. F. Yan ,
R. M. Cannon  and
H. K. Bowen
M. F. Yan
Affiliation:
Bell Laboratories, Murray Hill, New Jersey 07974
R. M. Cannon
Affiliation:
Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
H. K. Bowen
Affiliation:
Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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Abstract

The interaction potentials between solutes and grain boundaries in ionic solids are identified as [1] the electrostatic interaction between the charged solutes and grain boundaries and [2] the elastic energy due to size misfit of solutes in the matrix. Equilibrium solute distribution is calculated from the defect distributions leading to the minimum free energy. Space charge distributions near interfaces during kinetic processes are evaluated. We analyze the limiting case of constrained equilibrium in which the vacancy distribution and degree of solute-vacancy association satisfy a minimum free energy under the constraint of no solute redistribution.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 5: Symposium B – Grain Boundaries in Semiconductors , 1981 , 57
Copyright
Copyright © Materials Research Society 1982

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References

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