Diffusion processes in �?-Zr(Al) phase: a thermodynamic approach

[摘要] The diffusion behaviour in the ð›�?-Zr(Al) solid solution phase was investigated in the temperature range 1203â€�??1323 K using a thermodynamic approach. The Boltzmannâ€�?�Matano relation used for determining interdiffusion coefficients and the Darken’s equations used for evaluating the intrinsic diffusion coefficients from velocity of movement of markers in diffusion couples were modified suitably. The composition dependent thermodynamic interdiffusion coefficients were evaluated using chemical potential gradient. Composition and temperature dependence of the thermodynamic interdiffusion coefficients were also established. The thermodynamic intrinsic diffusion coefficients of Al and Zr and their temperature dependence were determined using the modified Darken’s equations.

[学科分类] 材料工程

[关键词] Interdiffusion;diffusion coefficient;activation energy;zirconium;aluminium.