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기계적 합성된 분말로부터 펄스전류활성 소결에 의한 나노구조 1.5TiAl-Al2O3 복합재료 제조 및 기계적 특성
김원백 ( Won Baek Kim ),왕희지 ( Hee Ji Wang ),노기민 ( Ki Min Roh ),조성욱 ( Sung Wook Cho ),임재원 ( Jae Won Lim ),손인진 ( In Jin Shon ) 대한금속재료학회 ( 구 대한금속학회 ) 2012 대한금속·재료학회지 Vol.50 No.4
Nano-powders of 1.5TiAl and Al2O3 were synthesized from 1.5TiO2 and 3Al powders by high energy ball milling. Nanocrystalline Al2O3 reinforced composite was consolidated by pulsed current activated sintering within 2 minutes from mechanochemically synthesized powders of Al2O3 and 1.5TiAl. The relative density of the composite was 99.5%. The average hardness and fracture toughness values obtained were 1250 kg/mm2 and 10 MPa·m1/2, respectively.
기계적 합성된 분말로부터 펄스전류활성 소결에 의한 나노구조 Ti3Al-Al2O3 복합재료 제조 및 기계적 특성
손인진 ( In Jin Shon ),왕희지 ( Hee Ji Wang ),서창열 ( Chang Yul Suh ),조성욱 ( Sung Wook Cho ),김원백 ( Won Baek Kim ) 대한금속재료학회(구 대한금속학회) 2011 대한금속·재료학회지 Vol.49 No.5
Nano-powders of Ti3Al and 2(Al2O3) were synthesized from 3Ti(O2) and 5Al powders by high energy ball milling. A nanocrystalline Al2O3 reinforced composite was consolidated by pulsed current activated sintering within 2 minutes from mechanochemically synthesized powders of Al2O3 and Ti3Al. 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/mm2 and 9 MPa·m1/2, respectively.