Ti-Zr二元体系BCC相扩散移动性的评价-中国有色金属学报.PDF

20 1 2010 10 Vol.20 Special 1 The Chinese Journal of Nonferrous Metals Oct. 2010 1004-0609(2010)S1-s0352-05 Ti-Zr BCC 1 1 1 2 1 1 1 (1. 710072 2. 43210) Ti-Zr BCC Calphad Ti-Zr Kirkendall Ti-Zr Calphad Dictra TG111.6 A Assessment of diffusional mobilities of BCC phase in Ti-Zr alloys 1 1 1 2 1 1 1 CHEN Yi , ZHONG Hong , TANG Bing , CUI Yu-wen , LI Jin-shan , CHANG Hui , ZHOU Lian (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 Calphad(Calculation of phase diagram) [1] [2]