한국분말재료학회지 (Journal of Powder Materials)

  • 제25권3호
  • /
  • Pages.208-212
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  • 2018
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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분말야금법으로 제조한 새로운 Co10Fe10Mn35Ni35Zn10 고엔트로피 합금

New Co10Fe10Mn35Ni35Zn10 high-entropy alloy Fabricated by Powder Metallurgy

  • 임다미 (포항공과대학교 신소재공학과) ;
  • 박형근 (포항공과대학교 신소재공학과) ;
  • ;
  • 이병주 (포항공과대학교 신소재공학과) ;
  • 김형섭 (포항공과대학교 신소재공학과)
  • Yim, Dami (Department of Materials Science and Engineering, Center for High Entropy Alloys Pohang University of Science and Technology) ;
  • Park, Hyung Keun (Department of Materials Science and Engineering, Center for High Entropy Alloys Pohang University of Science and Technology) ;
  • Tapia, Antonio Joao Seco Ferreira (Department of Materials Science and Engineering, Center for High Entropy Alloys Pohang University of Science and Technology) ;
  • Lee, Byeong-Joo (Department of Materials Science and Engineering, Center for High Entropy Alloys Pohang University of Science and Technology) ;
  • Kim, Hyoung Seop (Department of Materials Science and Engineering, Center for High Entropy Alloys Pohang University of Science and Technology)
  • 투고 : 2017.10.30
  • 심사 : 2017.11.08
  • 발행 : 2018.06.28
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초록

In this paper, a new $Co_{10}Fe_{10}Mn_{35}Ni_{35}Zn_{10}$ high entropy alloy (HEA) is identified as a strong candidate for the single face-centered cubic (FCC) structure screened using the upgraded TCFE2000 thermodynamic CALPHAD database. The $Co_{10}Fe_{10}Mn_{35}Ni_{35}Zn_{10}$ HEA is fabricated using the mechanical (MA) procedure and pressure-less sintering method. The $Co_{10}Fe_{10}Mn_{35}Ni_{35}Zn_{10}$ HEA, which consists of elements with a large difference in melting point and atomic size, is successfully fabricated using powder metallurgy techniques. The MA behavior, microstructure, and mechanical properties of the $Co_{10}Fe_{10}Mn_{35}Ni_{35}Zn_{10}$ HEA are systematically studied to understand the MA behavior and develop advanced techniques for fabricating HEA products. After MA, a single FCC phase is found. After sintering at $900^{\circ}C$, the microstructure has an FCC single phase with an average grain size of $18{\mu}m$. Finally, the $Co_{10}Fe_{10}Mn_{35}Ni_{35}Zn_{10}$ HEA has a compressive yield strength of 302 MPa.

키워드

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