The activation enthalpies and frequency factors for interdiffusion of Al and Re in the γ-phase of Ni-Al-Re ternary system were estimated by a series of experiments using diffusion couples in the temperature range from 1200 to 1300C. The method developed by Whittle and Green was applied to obtain the interdiffusion coefficients of the solutes (Al, Re) in the system. The activation enthalpies and the frequency factors deduced from the experiments confirmed the slower diffusion of Re than Al. In addition, it was found that the influence of Re upon the diffusion of Al in the γ-phase of Ni-Al-Re system was insignificant.

Al and Re Interdiffusion in the γ-Phase of Ni-Al-Re System. E.Mabruri, M.Hattori, K.Hasuike, T.Kunieda, Y.Murata, M.Morinaga: Materials Transactions, 2006, 47[5], 1408-11