Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Mechanical Properties and Fabrication of Nanostructured 1.5TiAl-Al2O3 Composite by Pulsed Current Activated Sintering

기계적 합성된 분말로부터 펄스전류활성 소결에 의한 나노구조 1.5TiAl-Al2O3 복합재료 제조 및 기계적 특성

  • Kim, Won-Baek (Minerals and Materials Processing Division, Korea Institute of Geoscience, Mining and Materials Resources) ;
  • Wang, Hee-Ji (Division of Advanced Materials Engineering and the Research Center of Advanced Materials Development, Engineering College, Chonbuk National University) ;
  • Roh, Ki-Min (Minerals and Materials Processing Division, Korea Institute of Geoscience, Mining and Materials Resources) ;
  • Cho, Sung-Wook (Minerals and Materials Processing Division, Korea Institute of Geoscience, Mining and Materials Resources) ;
  • Lim, Jae-Won (Minerals and Materials Processing Division, Korea Institute of Geoscience, Mining and Materials Resources) ;
  • Shon, In-Jin (Division of Advanced Materials Engineering and the Research Center of Advanced Materials Development, Engineering College, Chonbuk National University)
  • Received : 2011.09.05
  • Published : 2012.05.25
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Abstract

Nano-powders of 1.5TiAl and $Al_2O_3$ were synthesized from $1.5TiO_2$ and 3Al powders by high energy ball milling. Nanocrystalline $Al_2O_3$ reinforced composite was consolidated by pulsed current activated sintering within 2 minutes from mechanochemically synthesized powders of $Al_2O_3$ and 1.5TiAl. The relative density of the composite was 99.5%. The average hardness and fracture toughness values obtained were $1250kg/mm^2$ and $10MPa{\cdot}m^{1/2}$, respectively.

Keywords

Acknowledgement

Grant : 티타늄계 합금 스크랩의 불순물 제어 및 활용기술 개발

Supported by : 한국지질자원연구원, 한국에너지기술평가원(KETEP)

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