(1. 西北工业大学 凝固技术国家重点实验室，西安 710072；
2. 美国俄亥俄州立大学 材料科学与工程学院，哥伦布市 43210)
摘 要: 在丰富实验数据的基础上，结合相关的热力学参数，评估并获得Ti-Zr二元体系BCC相中的扩散移动性数据库。通过扩散移动性数据库计算的扩散系数与实验数据取得很好的一致性。基于Calphad技术，在所获得的扩散移动性数据库的基础上，结合相关的热力学描述，成功地模拟Ti-Zr二元体系半无限扩散偶浓度曲线和Kirkendall面的移动，并计算点阵面的移动距离。
关键字: Ti-Zr二元体系；扩散；Calphad；Dictra模型
（1. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an 710072, China;
2. Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210, USA）
Abstract:Based on the thermodynamic parameters and various experimental diffusion data available in the literature, the atomic mobilities for BCC phase of the Ti-Zr binary system were evaluated. The general agreement is obtained by comprehensive comparisons made between the calculated and experimental diffusion coefficients. The developed mobility database, in conjunction with the CALPHAD-type thermodynamic description, is successfully used to simulate the concentration profiles, such as typical experimental interdiffusion phenomena and the microstructural stability of the Kirkendall plane, and the lattice plane displacement was calculated.
Key words: Ti-Zr binary system; diffusion; Calphad; Dictra–modeling
