대한금속재료학회지 (Korean Journal of Metals and Materials)

  • 제50권12호
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  • Pages.961-966
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  • 2012
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  • 1738-8228(pISSN)
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  • 2288-8241(eISSN)
대한금속재료학회 (The Korean Institute of Metals and Materials)
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기계적으로 합성한 분말로부터 급속 소결에 의한 나노 구조의 Co-Al2O3 복합재료 제조

Fabrication of Nanocrystalline Co-Al2O3 from Mechanically Synthesized Powders by Rapid Sintering

  • 박나라 (전북대학교 신소재공학부 신소재개발연구소) ;
  • 손인진 (전북대학교 신소재공학부 신소재개발연구소)
  • Park, Na-Ra (Division of Advanced Materials Engineering, the Research Center of Advanced materials Development, Chonbuk National University) ;
  • Shon, In-Jin (Division of Advanced Materials Engineering, the Research Center of Advanced materials Development, Chonbuk National University)
  • 투고 : 2012.06.11
  • 발행 : 2012.12.25
⟨ 이전 논문 다음 논문 ⟩

초록

Nano-sized Co and $Al_2O_3$ powders were successfully synthesized from $3/4Co_3O_4$ and 2Al by high-energy ball milling. A dense nanocrystalline $2.25Co-Al_2O_3$ composite was consolidated from mechanically synthesized powders by the pulsed current activated sintering (PCAS) method within 2 min. Consolidation was accomplished under the combined effects of a pulsed current and mechanical pressure. A dense $2.25Co-Al_2O_3$ with relative density of up to 95% was produced under simultaneous application of a 80 MPa pressure and a pulsed current of 2800 A. The fracture toughness and hardness of the $2.25Co-Al_2O_3$ composite were $8MPa{\cdot}m^{1/2}$, $870kg/mm^2$, respectively.

키워드

과제정보

연구 과제 주관 기관 : 한국연구재단, 한국에너지평가원(KETEP)

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