Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Reaction Synthesis of Annealed Ni-50at%Al Powder Compact

어닐링처리한 Ni-50at%Al 압분체의 연소합성 거동

  • Cho, Yong-Jae (Foundry Technology Service Center, Korea Institute of Industrial Technology) ;
  • Lee, Han-Young (Dept. of Advanced Materials Engineering, Keimyung University)
  • 조용재 (한국생산기술연구원, 주조기술지원센터) ;
  • 이한영 (계명대학교 신소재공학과)
  • Received : 2011.01.27
  • Published : 2011.10.25
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Abstract

To reduce the heat released during intermetallic reaction, Ni-50at%Al powder compact has been previously annealed at several conditions before the reaction. The effects of the pre-annealing conditions on the reaction synthesis process have been investigated. Experimental results show that the heat released during the reaction synthesis decreased proportionally with increase of the pre-annealing temperature and duration time. The reaction duration period was significantly increased when the intermetallics were formed in the powder compact during the pre-annealing. This was attributed to the fact that the reaction occurred by solid-state diffusion between the un-reacted elemental atoms and that the $NiAl_3$ phase formed predominantly during pre-annealing.

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