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Influences of Lattice Sinks and Defect Interactions on Solutes in Compounds

Published online by Cambridge University Press:  01 February 2011

Gary S. Collins  and
Matthew O. Zacate
Gary S. Collins*
Affiliation:
Department of Physics, Washington State University Pullman, WA 99164, U.S.A.
Matthew O. Zacate
Affiliation:
Department of Physics, Washington State University Pullman, WA 99164, U.S.A.
*
*Corresponding author, collins@wsu.edu.
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Abstract

A thermodynamic model for the site preference of dilute solutes in ordered compounds was developed recently. The model is extended here in two ways to help interpret experimental results from this laboratory. (1) A preference for solutes to occupy sites in ‘sinks’ such as grain boundaries rather than regular lattice sites is included using a simple model. A wide range of site preference behavior is found; for example, a solute may switch between substitutional and sink sites with changing composition. (2) The effect of an attractive interaction between solute and defect on the site preference is examined. Conditions are established under which a solute can be stabilized by association with a defect on a site where the solute would otherwise not be found.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 719: Symposium F – Defect- and Impurity-Engineered Semiconductors and Devices III , 2002 , F8.19
Copyright
Copyright © Materials Research Society 2002

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References

1. Collins, Gary S. and Zacate, Matthew O. (unpublished). An application of the model to compounds having the L12 structure is given in Collins, Gary S. and Zacate, Matthew O., Hyperfine Interactions (accepted, to appear 2002.)Google Scholar
2. Zacate, Matthew O. and Collins, Gary S., Hyperfine Interactions (accepted, to appear 2002); Matthew O. Zacate and Gary S. Collins (to be published.)Google Scholar
3. Bai, Bin and Collins, Gary S., in High-temperature ordered intermetallic alloys VIII, eds. George, E.P., Mills, M. and Yamaguchi, M., (Mater. Res. Soc. Proc. 552, KK8.7–6 (1999)).Google Scholar
4. Zacate, M.O. and Collins, G.S., Defect and Diffusion Forum 194-199, 383–88 (2001).Google Scholar
5. Collins, G.S., Sinha, P. and Wei, M., Hyperfine Interactions (C) 1, 380–4 (1996).Google Scholar
6. Collins, Gary S., Peng, Luke S.-J. and Wei, Mingzhong, in High-temperature ordered intermetallic alloys VIII, eds. George, E.P., Mills, M. and Yamaguchi, M., (Mater. Res. Soc. Proc. 552, KK4.2–6 (1999)).Google Scholar