Ti-Al二元系中β,α,γ相的相平衡关系及互扩散系数的实验测定

PHASE EQUILIBRIUM RELATIONSHIPS AND INTERDIFFUSION COEFFICIENTS OF β,α ANDγIN THE Ti-Al BINARY SYSTEM

用扩散偶-电子探针法测定了Ti－al二元系的局部相平衡关系和成分，并用Matano法计算了β,α,γ相的互扩散系数.研究结果表明：Ti-al二元系高温局部的相平衡关系应是β／α和α／γ．γ相的互扩散系数在化学计量成分处呈最小值.

Partial phase equilibrium relationships and compositions in the Ti-al binary system are studied by diffusion couple and EPMa method. Interdiffusion coefflcients of β,αand γare calculated by Matano method. The results showed that the partial phase equilibrium relationships should be β/ αand α/ γ,and the interdiffusion coefficient of γ phase has a minimum value at stoichimetric composition.