Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Microstructure of Al-Si Coated Layer in PWA 1426 Alloy

PWA 1426 합금에서 Al-Si 코팅층의 미세조직

  • Ahn, J.C. (Agency for Defense Development) ;
  • Lee, K.K. (Dept. of Iron & Metallurgical Engineering, Hanlyo University)
  • Published : 1999.03.31
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Abstract

Microstructure of Al-Si coated PWA 1426 alloy was studied. Diffusion coated specimens were heat treated for 4hr at $870{\sim}1087^{\circ}C$ and then were examined the changes of microstructure and interfacial compound by optical microscopy, SEM and EDS. According to the result of EDS, it is supposed that the coated layer was composed of $Ni_2Al_3$. When diffusion treatment was conducted at $1087^{\circ}C$, coated layer varied from $Ni_2Al_3$ to NiAl phase and composed of mixed, denuded and inter-diffusion layer.

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