Ti-Zr二元合金在β相区的互扩散行为研究  

Research on Interdiffusion Behavior of Ti-Zr Binary Alloy in the β Phase

作　　者：冯亮[1] 李金山[2] 崔予文[3] 黄磊[2] 寇宏超[2] 周廉[1,2] 

机构地区：[1]西北有色金属研究院,陕西西安710016 [2]西北工业大学,陕西西安710072 [3]俄亥俄州立大学,美国哥伦布4321011

出　　处：《稀有金属材料与工程》2011年第4期610-614,共5页Rare Metal Materials and Engineering

基　　金："973"项目(2007CB613802);"211"引智项目

摘　　要：通过扩散偶技术,利用电子探针(EPMA)研究了Ti-Zr二元合金在β相区(950至1150℃)的互扩散行为。采用Den Broeder方法及Hall修正法计算了Ti-Zr二元合金的互扩散系数,其范围为10-14～10-12m2/s;计算了扩散激活能Q和频率因子D0,两者均随Zr浓度的增加呈现先增加后减小的规律,其峰值均出现在50at%Zr浓度附近。用Vignes-Birchenall方法计算了Ti-Zr二元合金在扩散组元极限浓度处的杂质扩散系数,并与用Hall修正方法计算的互扩散系数进行了对比,二者结果比较接近。The interdiffusion behavior of Ti-Zr binary alloy in the β phase （950 to 1150 oC） was studied through the diffusion couples by EPMA. The interdiffusion coefficients of the Ti-Zr binary alloy were calculated by the Den Broeder method and modified by the Hall method in the concentration limits between 10-14 and 10-12 m2/s. The diffusion activation energy Q and frequency factor D0 were calculated. The results show that Q and D0 increase at first and then decrease with the increase of Zr concentration and a summit can be got at about 50at% Zr concentration. The impurity diffusion coefficients in concentration limits were calculated by Vignes-Birchenall method and they were compared with the interdiffusion coefficients determined by Hall modification method. It is found that their results are similar.

关 键 词：Ti-Zr二元合金 互扩散系数 杂质扩散系数 激活能 频率因子 

分 类 号：TG111.6[金属学及工艺—物理冶金]