材料科学
成核
扩散
钛
表面能
降水
基质(化学分析)
接口(物质)
钛合金
化学物理
热力学
冶金
化学工程
复合材料
合金
接触角
工程类
气象学
物理
坐滴法
作者
Youzhi Gao,Xuyang Liu,Liangxiao Wei,Xuefeng Zhang,Min Chen
标识
DOI:10.1016/j.surfin.2022.102321
摘要
The segregation behavior of elements at the Ti/TiFe coherent interface were studied by first-principles calculation. The effect of elements on nucleation, growth, and coarsening of the TiFe precipitate were analyzed by calculation of segregation energy, interfacial energy and diffusion rate. The results show that Ni, Co, Cu, V and Mo atoms have the obvious tendency to segregate towards the interface. Cr and Mn prefer to accumulate in the TiFe precipitate while Al to be energetically more favorable to enrich in Ti matrix. The mechanism of the above different segregation phenomena of the elements at the coherent Ti/TiFe interface was also analyzed and the corresponding thermodynamic driving force was proposed. The interfacial segregation results in the reduction of interface energy. Titanium alloys containing with V and Co elements are more conducive to the nucleation of TiFe precipitate from the Ti matrix. The coarsening of TiFe precipitate is effectively modified by addition of the Co, Ni and Al.
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