Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Synthesis of Titanium Silicide by Electro-Discharge-Sintering of Ti and Si Powder Mixture

Ti 및 Si 혼합 분말의 전기방전소결에 의한 Titanium Silicide의 합성 연구

  • Cheon Y. W. (Department of Advanced Materials Engineering, Sejong University) ;
  • Oh N. H. (Department of Advanced Materials Engineering, Sejong University) ;
  • Kim Y. H. (Department of Advanced Materials Engineering, Sejong University) ;
  • Byun C. S. (Department of Materials Engineering, Hanbat University) ;
  • Lee S. H. (Department of Materials Engineering, Hanbat University) ;
  • Lee W. H. (Department of Advanced Materials Engineering, Sejong University)
  • 천연욱 (세종대학교 신소재공학과) ;
  • 오낙현 (세종대학교 신소재공학과) ;
  • 김영훈 (세종대학교 신소재공학과) ;
  • 변창섭 (한밭대학교 신소재공학과) ;
  • 이상호 (한밭대학교 신소재공학과) ;
  • 이원희 (세종대학교 신소재공학과)
  • Published : 2005.12.01
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Abstract

The synthesis and consolidation of titanium silicide by electro-discharge-sintering has been investigated. As-received Ti powder was in flaky shape and the mean particle size was $45.0{\mu}m$, whereas the mean particle size of the pre-milled Si powder with angular shape was $8.0{\mu}m$. Single pulse of 2.5 to 5.0 kJ/0.34g-elemental Ti and pre-milled Si powder mixture with the composition of $Ti-37.5at.\%$ Si was applied using $300{\mu}F$ capacitor. The solid with $Ti_5Si_3$ phase has been successfully fabricated by the discharge with the input energy more than 2.5kJ in less than $129{\mu}sec.$ Hv values were found to be higher than $1000kgf/mm^2$. The formation of $Ti_5Si_3$ occurred through a fast solid state diffusion reaction.

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