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| CHEMICAL INTERDIFFUSION COEFFICIENTS OF NiAl PHASE |
| WEI Hua, JIN Tao, SUN Xiaofeng |
| Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 |
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Abstract NiAl phase is a typical Hume-Rothery compound with excellent oxidation-resistant property so this phase is often used as master phase of aluminide coatings. Because diffusion phenomena is extremely important for formation and degradation of aluminide coatings, it is possible to understand the natural characteristics of the diffusion phenomena controlling the degradation of aluminide coatings through chemical diffusion coefficients of NiAl phase obtained. This work reviews chemical diffusion coefficients of NiAl phase in the Ni-Al binary system, the Ni-Cr-Al ternary system, and the Ni-Co-Cr-Al quaternary system. Based on the obtained chemical diffusion coefficients of NiAl phase, the mobility database of NiAl phase is set up using the PARRAT module in the commercial DICTRA software for determining chemical diffusion coefficients of NiAl phase in the multiphase systems.
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Received: 26 April 2011
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Corresponding Authors:
WEI Hua
E-mail: hwei@imr.ac.cn
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