Al and Re Interdiffusion in the γ-Phase of Ni-Al-Re System

Efendi Mabruri; Masataka Hattori; Kouichi Hasuike; Tomonori Kunieda; Yoshinori Murata; Masahiko Morinaga

doi:10.2320/matertrans.47.1408

Efendi Mabruri, Masataka Hattori, Kouichi Hasuike, Tomonori Kunieda, Yoshinori Murata, Masahiko Morinaga

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Keywords: nickel based superalloys, interdiffusion activation enthalpy, diffusion couple, nickel-aluminum-rhenium system

JOURNAL FREE ACCESS

2006 Volume 47 Issue 5 Pages 1408-1411

DOI https://doi.org/10.2320/matertrans.47.1408

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Abstract

The activation enthalpies and frequency factors for interdiffussion 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 1300°C. 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 Q and the frequency factors \\ ildeD_o obtained from the experiments confirmed the slower diffusion of Re than Al. In addition, it was found that the influence of Re on the diffusion of Al in the γ-phase of Ni-Al-Re system was insignificant.

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