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《厦门大学学报（自然科学版）》[ISSN:0438-0479/CN:35-1070/N]

卷:

56卷

期数:

2017年01期

页码:

25-32

栏目:

研究论文

出版日期:

2017-01-23

文章信息/Info

Title:

Measurement of Interdiffusivities and Calculation of Kinetics in bcc Ti-Sn and Ti-Ni Binary Systems

文章编号:

0438-0479(2017)01-0025-08

作者:

王翠萍; 罗奕胜; 卢 勇; 韩佳甲; 郭毅慧; 柳玉恒; 刘兴军^*

厦门大学材料学院,福建 厦门 361005

Author(s):

WANG Cuiping; LUO Yisheng; LU Yong; HAN Jiajia; GUO Yihui; LIU Yuheng; LIU Xingjun^*

College of Materials,Xiamen University,Xiamen 361005,China

关键词:

Ti-Sn二元系;  Ti-Ni二元系;  扩散偶;  扩散系数;  扩散迁移率参数;  DICTRA

Keywords:

Ti-Sn binary system;  Ti-Ni binary system;  diffusion couples;  diffusion coefficient;  diffusion mobility;  diffusion controlled transformation(DICTRA)

分类号:

TG 111.6

DOI:

10.6043/j.issn.0438-0479.201604030

文献标志码:

A

摘要:

通过制备Ti/Ti-7%Sn、Ti/Ti-9%Sn和Ti/Ti-6%Ni扩散偶(7%,9%,6%均为原子分数),利用EPMA(electron probe micro-analyzer)技术测定了扩散偶的摩尔分数-距离曲线,根据摩尔分数-距离曲线用Den Broeder方法计算了Ti-Sn和Ti-Ni二元系中bcc相在1 273,1 373和1 473 K下的互扩散系数.利用DICTRA(diffusion controlled transformation)软件分别优化了Ti-Sn和Ti-Ni二元系中bcc相的扩散迁移率参数,计算结果和实验数据取得了良好的一致性.运用优化得到的扩散迁移率参数计算了扩散偶的摩尔分数-距离曲线,通过计算结果和实验数据比较表明,所优化的扩散迁移率参数具有良好的准确性与有效性.

Abstract:

On the basis of Ti/Ti-7%Sn,Ti/Ti-9%Sn and Ti/Ti-6%Ni diffusion couples(7%,9%,6% were atomic fraction),respectively,interdiffusion coefficients in the bcc Ti-Sn and Ti-Ni binary alloys at the temperature of 1 273,1 373 and 1 473 K were evaluated by means of the Den Broeder method and electron probe micro-analyzer(EMPA).Based on various reported experimental diffusion coefficients and what was measured in this study,accurate atomic mobilities in the bcc Ti-Sn and Ti-Ni alloys were assessed via the diffusion controlled transformation(DICTRA)simulation package.Comparison between the calculated and measured diffusion coefficients indicated that most of the experimental information can be reproduced reasonably.The developed diffusion mobilities were further validated by the prediction of the mole fraction-distance profiles.

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备注/Memo

备注/Memo:

收稿日期:2016-04-18 录用日期:2016-05-16
基金项目:国家自然科学基金青年科学基金(51301146); 国家国际科技合作专项(2014DFA53040)
*通信作者:lxj@xmu.edu.cn

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更新日期/Last Update: 1900-01-01