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 Ti3Al-Al2O3 Composite from Mechanically Synthesized Powders by Pulsed Current Activated Sintering

기계적 합성된 분말로부터 펄스전류활성 소결에 의한 나노구조 Ti3Al-Al2O3 복합재료 제조 및 기계적 특성

  • Shon, In-Jin (Division of Advanced Materials Engineering and the Research Center of Advanced Materials Development, Engineering College, Chonbuk National University) ;
  • Wang, Hee-Ji (Division of Advanced Materials Engineering and the Research Center of Advanced Materials Development, Engineering College, Chonbuk National University) ;
  • Suh, Chang-Yul (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) ;
  • Kim, Wonbaek (Minerals and Materials Processing Division, Korea Institute of Geoscience, Mining and Materials Resources)
  • 손인진 (전북대학교 신소재공학부, 신소재개발연구센터) ;
  • 왕희지 (전북대학교 신소재공학부, 신소재개발연구센터) ;
  • 서창열 (한국지질자원연구원) ;
  • 조성욱 (한국지질자원연구원) ;
  • 김원백 (한국지질자원연구원)
  • Received : 2011.03.02
  • Published : 2011.05.25
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Abstract

Nano-powders of $Ti_3Al$ and $2Al_2O_3$ were synthesized from $3TiO_2$ and 5Al powders by high energy ball milling. A 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 $Ti_3Al$. Nanocrystalline materials, have received much attention as advanced engineering materials due to their improved physical and mechanical properties. The relative density of the composite was 99.5%. The average obtained hardness and fracture toughness values were 1510 kg/$mm^2$ and $9\;MPa{\cdot}m^{1/2}$, respectively.

Keywords

Acknowledgement

Grant : 전략금속 산업원료화 기술개발

Supported by : 한국지질자원연구원

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