Synthesis of intermetallic compound in isochronal heating of Al/Ni powder mixture and its forming

Eiji Yuasa, Kosuke Yamaguchi, Katsuyoshi Kondou, Tatsuhiko Aizawa

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1 Citation (Scopus)

Abstract

Hot working of intermetallic compound is difficult because of its high mechanical strength at high temperature, but it seems to be possible by the forming under condition of solid-liquid state that is formed by heating at fusion temperature of lower melting metal in powder mixture. This study was done on synthesis of intermetallic compound from the solid-liquid state when Al-(40-44)mass%Ni powder mixture was heated with various heating rates. The Al-Ni solid solution forms at lower temperature than the melting point of aluminum and then the solid-liquid state forms with high exothermic heat by fusion of the solid solution. After solidification from this state, microstructures of the Al-Ni alloy are constituted with Al3Ni2 and Al3Ni intermetallic phases and eutectic structure. The same microstructure in the Al-Ni alloy backward-extruded under condition of the solid-liquid state is constituted as the isochronally heated powder mixture.

Original languageEnglish
Pages (from-to)52-57
Number of pages6
JournalFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
Volume49
Issue number1
Publication statusPublished - 2002 Jan
Externally publishedYes

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Keywords

  • Al-Ni alloy
  • Backward extrusion
  • Intermetallic compound
  • Powder mixture
  • Solid-liquid state

ASJC Scopus subject areas

  • Mechanical Engineering
  • Metals and Alloys

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