Study of atomic mobilities and diffusion characteristics in bcc Ti-Ta and Ta-W alloys

被引：24

作者：

Liu, Yajun ^{[1
]}

Zhang, Lijun ^{[2
]}

Du, Yong ^{[2
]}

Wang, Jiang ^{[3
]}

Liang, Dong ^{[4
]}

机构：

[1] Montana State Univ, Western Transportat Inst, Bozeman, MT 59715 USA

[2] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[3] EMPA, Swiss Fed Labs Mat Testing & Res, Lab Joining & Interface Technol, CH-8600 Dubendorf, Switzerland

[4] DNV Columbus, Dublin, OH 43017 USA

来源：

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY | 2010年 / 34卷 / 03期

关键词：

Diffusion; Mobility; bcc Ti-Ta and Ta-W alloys; CALPHAD; DICTRA; BIOMEDICAL APPLICATIONS; SELF-DIFFUSION; AL-FE; TUNGSTEN; NI; SYSTEM; PHASE; INTERDIFFUSION; TA182; CR;

D O I：

10.1016/j.calphad.2010.06.004

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In order to assist the design of bcc Ti-Ta and Ta-W alloys, the atomic mobilities of Ti, Ta and W are studied critically with the DICTRA software (Diffusion Controlled TRAnsformation), based on the published thermodynamic description, self-diffusion coefficients, impurity diffusion coefficients, intrinsic diffusion coefficients and interdiffusion coefficients. Good agreement is obtained from the comprehensive comparisons between the calculated and measured diffusion coefficients. To further verify the obtained atomic mobilities, the concentration profiles and Kirkendall marker shift in bcc Ti-Ta and Ta-W diffusion couples are explored computationally, the results of which can reproduce satisfactorily the experimental measurements. Published by Elsevier Ltd

引用

页码：310 / 316

页数：7

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