Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Interfacial Reaction between Spark Plasma Sintered High-entropy Alloys and Cast Aluminum

고엔트로피합금 분말야금재와 알루미늄 주조재 사이의 계면 반응 연구

  • Kim, Min-Sang (Metallic Material R&D Center, Korea Automotive Technology Institute) ;
  • Son, Hansol (School of Materials Science and Engineering, Kookmin University) ;
  • Jung, Cha Hee (School of Materials Science and Engineering, Kookmin University) ;
  • Han, Juyeon (School of Materials Science and Engineering, Kookmin University) ;
  • Kim, Jung Joon (School of Materials Science and Engineering, Kookmin University) ;
  • Kim, Young-Do (Department of Materials Science & Engineering, Hanyang University) ;
  • Choi, Hyunjoo (School of Materials Science and Engineering, Kookmin University) ;
  • Kim, Se Hoon (Metallic Material R&D Center, Korea Automotive Technology Institute)
  • 김민상 (한국자동차연구원 첨단구조소재연구센터) ;
  • 손한솔 (국민대학교 신소재공학과) ;
  • 정차희 (국민대학교 신소재공학과) ;
  • 한주연 (국민대학교 신소재공학과) ;
  • 김정준 (국민대학교 신소재공학과) ;
  • 김영도 (한양대학교 신소재공학부) ;
  • 최현주 (국민대학교 신소재공학과) ;
  • 김세훈 (한국자동차연구원 첨단구조소재연구센터)
  • Received : 2022.06.13
  • Accepted : 2022.06.27
  • Published : 2022.06.28
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Abstract

This study investigates the interfacial reaction between powder-metallurgy high-entropy alloys (HEAs) and cast aluminum. HEA pellets are produced by the spark plasma sintering of Al0.5CoCrCu0.5FeNi HEA powder. These sintered pellets are then placed in molten Al, and the phases formed at the interface between the HEA pellets and cast Al are analyzed. First, Kirkendall voids are observed due to the difference in the diffusion rates between the liquid Al and solid HEA phases. In addition, although Co, Fe, and Ni atoms, which have low mixing enthalpies with Al, diffuse toward Al, Cu atoms, which have a high mixing enthalpy with Al, tend to form Al-Cu intermetallic compounds. These results provide guidelines for designing Al matrix composites containing high-entropy phases.

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References

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