Accessible Requires Authentication Published by De Gruyter August 31, 2016

Interdiffusion in bcc_B2 Ni–Al–Cu alloys at 1 173 K

Dongyang Kuang, Dandan Liu, Weimin Chen, Zhao Lu, Lijun Zhang, Yong Du, Zhanpeng Jin and Chengying Tang

Abstract

The interdiffusion behavior of bcc_B2 Ni–Al–Cu alloys at 1173 K was experimentally investigated on the basis of six groups of bulk diffusion couples. With the electron probe microanalysis technique and the Matano–Kirkaldy method, the composition-dependent mole-fraction interdiffusion coefficients and the interdiffusion fluxes in bcc_B2 Ni–Al–Cu alloys at 1173 K were determined. The reliability of the presently obtained interdiffusivities was verified by the thermodynamic stability constraints, comparison with the interdiffusion coefficients in boundary binary bcc_B2 Ni–Al alloys as well as numerical simulations based on Fick's second law.


*Correspondence address, Professor Dr. Lijun Zhang, State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan 410083, P. R. China, Tel.: +86 731 88877963, Fax: +86 731 88710855, E-mail: ;

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Received: 2015-11-30
Accepted: 2016-03-18
Published Online: 2016-08-31
Published in Print: 2016-07-14

© 2016, Carl Hanser Verlag, München