Dongyang Kuang, Dandan Liu, Weimin Chen, Zhao Lu, Lijun Zhang, Yong Du, Zhanpeng Jin, Chengying Tang
August 31, 2016
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.