한국재료학회지 (Korean Journal of Materials Research)

  • 제33권3호
  • /
  • Pages.95-100
  • /
  • 2023
  • /
  • 1225-0562(pISSN)
  • /
  • 2287-7258(eISSN)
한국재료학회 (Materials Research Society of Korea)
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Effect of Al on Structural and Magnetic Characteristics of CoCrFeNiMnAlx High Entropy Alloys

  • Majid Tavoosi (Department of Materials Engineering, Malek Ashtar University of Technology) ;
  • Ali Ghasemi (Department of Materials Engineering, Malek Ashtar University of Technology) ;
  • Gholam Reza Gordani (Department of Materials Engineering, Malek Ashtar University of Technology) ;
  • Mohammad Reza Loghman Estarki (Department of Materials Engineering, Malek Ashtar University of Technology)
  • 투고 : 2023.01.25
  • 심사 : 2023.02.19
  • 발행 : 2023.03.27
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초록

This research examines the effect of adding aluminum on the structural, phasic, and magnetic properties of CoCrFe NiMnAlx high-entropy alloys. To this aim, the arc-melt process was used under an argon atmosphere for preparing cast samples. The phasic, structural, and magnetic properties of the samples were characterized by x-ray diffraction (XRD), scanning electron microscopy (SEM), and vibrational magnetometry (VSM) analyses. Based on the results, the addition of aluminum to the compound caused changes in the crystalline structure, from FCC solid solution in the CoCrFeNiMn sample to CoCrFeNiMnAl BBC solid solution. It was associated with changes in the magnetic property of CoCrFeNiMnAlx high-entropy alloys, from paramagnetic to ferromagnetic. The maximum saturation magnetization for the CoCrFeNiMnAl casting sample was estimated to be around 79 emu/g. Despite the phase stability of the FCC solid solution with temperature, the solid solution phase formed in the CrCrFeNiMnAl high-entropy compound was not stable, and changed into FCC solid solution with temperature elevation, causing a reduction in saturation magnetization to about 7 emu/g.

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