Ni-Cr-W三元系富Ni侧fcc相的互扩散及原子迁移率研究  

Interdiffusion and Atomic Mobilities in Ni-rich fcc Ni-Cr-W Alloys

作　　者：王翠萍[1] 秦诗洋 卢勇[1] 魏振帮 于金鑫 邹宏伟 杨水源[1] 韩佳甲[1] 刘兴军[1,2] Wang Cuiping;Qin Shiyang;Lu Yong;Wei Zhenbang;Yu Jinxin;Zou Hongwei;Yang Shuiyuan;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》2020年第2期441-446,共6页Rare Metal Materials and Engineering

基　　金：National Key R&D Program of China(2016YFB0701401);National Natural Science Foundation of China(51771158,51471138)。

摘　　要：利用电子探针微量分析与Whittle-Green方法确定了在1200℃下退火72 h的Ni-Cr-W三元合金体系的互扩散系数。通过DICTRA软件包对实验互扩散系数进行评估以确定原子迁移率。通过全面分析比较模型预测的扩散特性和实验数据的良好一致性验证了原子迁移率的合理性。Ni-Cr-W三元体系中的扩散现象,如扩散路径和浓度-距离曲线可以通过获得的原子迁移率合理地描述,进一步证明了本研究所获得的原子迁移率参数的可靠性。Six diffusion couples of Ni-Cr-W ternary alloys were prepared,annealed at 1473 K for 72 h and measured by the electron probe microanalysis combined with Whittle-Green method in order to determine the interdiffusion coefficients.The experimental interdiffusion coefficients were critically assessed to obtain the atomic mobilities by means of DICTRA software package.A good agreement has been obtained by comprehensive comparison between the experimental data and the model-predicted diffusion properties,which verifies the reliability of the atomic mobilities of Ni,Cr and W in Ni-Cr-W alloys.The diffusion phenomena,such as diffusion paths and the concentration-distance profiles in the Ni-Cr-W ternary system can be reasonably described by the presently obtained atomic mobilities.

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

分 类 号：TG146.15[一般工业技术—材料科学与工程]