Ti-Zr二元体系BCC相扩散移动性的评估  

Assessment of diffusional mobilities of BCC phase in Ti-Zr alloys

作　　者：陈逸[1] 钟宏[1] 唐斌[1] 崔予文[2] 李金山[1] 常辉[1] 周廉[1] 

机构地区：[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

出　　处：《中国有色金属学报》2010年第B10期352-356,共5页The Chinese Journal of Nonferrous Metals

基　　金：凝固技术国家重点实验室自主课题资助项目(37-TP-2009)

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。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.

关 键 词：Ti-Zr二元体系 扩散 CALPHAD Dictra模型 

分 类 号：TG111.6[金属学及工艺—物理冶金]