Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Complex Forming of the High-Functional Intermetallic Compound by the In Process Synthesis

In-Process합성에 의한 고기능 금속간화합물의 복합성형

  • Han, Jung-Hyun (School of Material Science and Engineering, Pusan National University) ;
  • Park, Seong-Kab (School of Material Science and Engineering, Pusan National University) ;
  • Park, Yong-Ho (School of Material Science and Engineering, Pusan National University)
  • Published : 2006.12.28
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Abstract

[ $MoSi_2$ ] alloys with Al, B or Nb were prepared by an advanced consolidation process that combined mechanical alloying with pulse discharge sintering (complex forming) to improve the mechanical properties. Their microstructure and mechanical properties were investigated. The $MoSi_2$ alloys fabricated by complex forming method showed very fine microstructure when compared with the sample sintered from commercial $MoSi_2$ powders. Alloys made from powders milled in Ar gas had fewer silica or alumina phases as compared to their counterparts sintered from powders milled in air. In densification of the sintered body, addition of B was more effective than Al or Nb. Both Victors hardness and tensile test indicated that the alloy fabricated by the complex forming method showed better properties than the sample sintered from commercial $MoSi_2$ powders. The Al added alloy sintered from the powders milled in air had the superior mechanical properties due to the suppression of $SiO_2$ and formation of fine $Al_2O_3$ particles.

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