Ni-Nb-Ti三元系富Ni侧fcc相的互扩散及原子迁移率研究（英文）  

Interdiffusion and Atomic Mobilities in Ni-rich fcc Ni-Nb-Ti Alloys

作　　者：王翠萍[1] 林远靖 卢勇[1] 魏振帮 张晏清 韩佳甲[1] 刘兴军[1,2] Wang Cuiping;Lin Yuanjing;Lu Yong;Wei Zhenbang;Zhang Yanqing;Han Jiajia;Liu Xingjun(Fujian Provincial Key Laboratory of Materials Genome, Xiamen University, Xiamen 361005,China;Graduate School at Shenzhen, Harbin Institute of Technology, Shenzhen 518055,China)

机构地区：[1]厦门大学福建省材料基因工程重点实验室,福建厦门361005 [2]哈尔滨工业大学深圳研究生院,广东深圳518055

出　　处：《稀有金属材料与工程》2019年第6期1803-1808,共6页Rare Metal Materials and Engineering

基　　金：National Key Basic Research and Development Program of China(2016YFB0701401,2017YFB0702901);National Natural Science Foundation of China(51571168,51771158,51471138);International Science and Technology Cooperation Program of China(2014DFA53040)

摘　　要：利用EPMA技术测定了Ni-Nb-Ti三元系富Ni侧合金在1273K下的扩散数据,并使用Whittle和Green方法计算了Ni-Nb-Ti三元系在1273 K下的互扩散系数。通过DICTRA软件优化得到Ni-Nb-Ti三元系的fcc相的原子迁移率,运用优化得到的的原子迁移率计算出的互扩散系数与实验数据具有较好的一致性,从而验证了所得的原子迁移率的可靠性。同时通过运用原子迁移率拟合各扩散偶的的浓度-距离曲线和扩散路径,进一步验证了原子迁移率的合理性。Experimental diffusion data in Ni-rich fcc Ni-Nb-Ti alloys at 1273 K was measured by electronic-probe microanalysis and the interdiffusion coefficients have been determined using Whittle and Green method. The atomic mobilities of Ni, Nb and Ti in Ni-Nb-Ti alloys have been obtained through assessing the interdiffusion data critically with the DICTRA software. Comprehensive comparisons between calculated and experimental diffusion coefficients show that the atomic mobilities obtained in this work could well reproduce the experimental data. And the validity of the diffusion mobilities was tested by simulating the concentrationdistance profiles and diffusion paths in diffusion couples.

关 键 词：Ni-Nb-Ti合金 原子迁移率 互扩散系数 扩散偶 DICTRA 

分 类 号：TG146.15[一般工业技术—材料科学与工程]