Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Mechanical Properties and Fabrication of Nanostructured 2MoSi2-SiC by Pulsed Current Activated Combustion Synthesis

펄스 전류 활성 연소합성에 의한 나노구조의 2MoSi2-SIC제조 및 기계적 성질

  • Shon, In-Jin (Department of Advanced Materials Engineering, The Research Center of Advanced Materials Development, Chonbuk National University) ;
  • Kim, Dong-Ki (Department of Advanced Materials Engineering, The Research Center of Advanced Materials Development, Chonbuk National University) ;
  • Jeong, In-Kyoon (Department of Advanced Materials Engineering, The Research Center of Advanced Materials Development, Chonbuk National University) ;
  • Doh, Jung-Mann (Advanced Functional Materials Research Center, Korea Institute of Science and Technology) ;
  • Yoon, Jin-Kook (Advanced Functional Materials Research Center, Korea Institute of Science and Technology) ;
  • Ko, In-Yong (Department of Advanced Materials Engineering, The Research Center of Advanced Materials Development, Chonbuk National University)
  • 손인진 (전북대학교 신소재공학부 신소재 개발 연구 쎈터) ;
  • 김동기 (전북대학교 신소재공학부 신소재 개발 연구 쎈터) ;
  • 정인균 (전북대학교 신소재공학부 신소재 개발 연구 쎈터) ;
  • 도정만 (한국과학기술 연구원 기능금속 연구쎈터) ;
  • 윤진국 (한국과학기술 연구원 기능금속 연구쎈터) ;
  • 고인용 (전북대학교 신소재공학부 신소재 개발 연구 쎈터)
  • Published : 2007.08.28
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Abstract

Dense nanostructured $2MoSi_{2}-SiC$ composites were synthesized by the pulsed current activated combustion synthesis (PCACS) method within 3 minutes in one step from mechanically activated powders of $Mo_{2}C$ and 5Si. Simultaneous combustion synthesis and densification were accomplished under the combined effects of a pulsed current and mechanical pressure. Highly dense $2MoSi_{2}-SiC$ with relative density of up to 96% was produced under simultaneous application of a 60 MPa pressure and the pulsed current. The average grain size of $MoSi_{2}$ and SiC were about 120 nm and 90 nm, respectively. The hardness and fracture toughness values obtained were 1350 $kg/mm^{2}$ and 4 $MPa{\cdot}m^{1/2}$, respectively.

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