Microscopic phase-field study on aging behavior of Ni75Al17Zn8 alloy
来源期刊：中国有色金属学报(英文版)2010年第4期
论文作者：赵彦 陈铮 卢艳丽 张利鹏
文章页码：675 - 681
Key words：microscopic phase-field; Ni75Al17Zn8 alloy; coarsening behavior
Abstract:
The precipitating kinetics of Ni75Al17Zn8 alloy was studied at both 873K and 973K by microscopic phase-field model. The calculation results show that the order-disorder transformation experiences the matrix → lowly-ordered L10 phase → L12 phase at 973 K. And the nucleation of L12 particles belongs to the spinodal decomposition mechanism. As temperature increases, orderings of Al and Zn atoms are resisted, but coarsening of L12 particles is promoted. The value of coarsening kinetic exponents approaches to 1/2. In addition, the discussions about Ni-Al anti-site defect and Zn substitutions for Ni site and Al site exhibit that the higher the temperature, the more distinctive the Ni-Al anti-site defect, but the less the Zn substitution.
基金信息：the National Natural Science Foundation of China
