한국분말재료학회지 (Journal of Powder Materials)

  • 제28권4호
  • /
  • Pages.287-292
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  • 2021
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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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Fabrication of Layered Cu-Fe-Cu Structure by Cold Consolidation of Powders using High-pressure Torsion

  • Asghari-Rad, Peyman (Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH)) ;
  • Choi, Yeon Taek (Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH)) ;
  • Nguyen, Nhung Thi-Cam (Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH)) ;
  • Sathiyamoorthi, Praveen (Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH)) ;
  • Kim, Hyoung Seop (Department of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH))
  • 투고 : 2021.08.01
  • 심사 : 2021.08.27
  • 발행 : 2021.08.28
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초록

In this study, the layered structures of immiscible Fe and Cu metals were employed to investigate the interface evolution through solid-state mixing. The pure Fe and Cu powders were cold-consolidated by high-pressure torsion (HPT) to fabricate a layered Cu-Fe-Cu structure. The microstructural evolutions and flow of immiscible Fe and Cu metals were investigated following different iterations of HPT processing. The results indicate that the HPT-processed sample following four iterations showed a sharp chemical boundary between the Fe and Cu layers. In addition, the Cu powders exhibited perfect consolidation through HPT processing. However, the Fe layer contained many microcracks. After 20 iterations of HPT, the shear strain generated by HPT produced interface instability, which caused the initial layered structure to disappear.

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과제정보

This research was financially supported by the National Research Foundation of Korea (NRF: 2021R1A2C3006662) and the Ministry of Trade, Industry, and Energy (20000495).

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