新型钴基与Nb-Si基高温合金扩散动力学研究进展

刘兴军, 魏振帮, 卢勇, 韩佳甲, 施荣沛, 王翠萍

Progress on the Diffusion Kinetics of Novel Co-based and Nb-Si-based Superalloys

LIU Xingjun, WEI Zhenbang, LU Yong, HAN Jiajia, SHI Rongpei, WANG Cuiping

表3 3种自扩散系数与杂质扩散系数获取方法的对比

Table 3 Comparisons of three methods for calculating impurity diffusion coefficient and self-diffusion coefficient

Method Total number of system Time consuming (single system) Property Semi-empirical model > 15000 < 1 min High efficiency, low accuracy First principles > 15000 > 5 h Strong, professionalism, high learning cost, high accuracy, low efficiency Experiment > 15000 3-5 d Not suitable for metastable systems