Diffusion kinetics in dilute binary alloys with the h.c.p. crystal structure |
| |
| Authors: | AR Allnatt GE Murch |
| |
| Institution: | 1. Department of Chemistry, University of Western Ontario, London, Ontario, Canada;2. Centre for Mass and Thermal Transport in Engineering Materials, University of Newcastle, Callaghan, NSW 2308, Australia |
| |
| Abstract: | In this paper, an extended version of the matrix method is derived in order to address diffusion kinetics for the full anisotropic three-dimensional h.c.p. structure. It is shown that the diffusion anisotropy can be properly addressed with a model of 13 atom-vacancy frequencies which is an extended version of the well-known 5-frequency model for the f.c.c. lattice. Both tracer and phenomenological diffusion coefficients are calculated using this new approach. Extended Monte Carlo simulations are performed in order to cross-check some of the results of the matrix method. Applications of the proposed model to experimental diffusion data are discussed. |
| |
| Keywords: | diffusion simulation theoretical anisotropic properties |
|
|
