Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Sintering of Ni-Based Amorphous Alloy Powders by Plasma Activated Sintering Process

PAS법을 이용한 Ni기 비정질 분말의 소결

  • Koo, Ja-Min (School of Nano-and Advanced Materials, Changwon National University) ;
  • Shin, Kee-Sam (School of Nano-and Advanced Materials, Changwon National University) ;
  • Kim, Yoon-Bae (Magnetic Materials, Group, KIST) ;
  • Bae, Jong-Soo (Powder Metallurgy Group, KIMM) ;
  • Hur, Sung-Kang (School of Nano-and Advanced Materials, Changwon National University)
  • 구자민 (창원대 나노 신소재공학부) ;
  • 신기삼 (창원대 나노 신소재공학부) ;
  • 김윤배 (한국과학기술연구원 자성재료 그룹) ;
  • 배종수 (한국기계연구원 분말재료그룹) ;
  • 허성강 (창원대 나노 신소재공학부)
  • Published : 2005.12.01
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Abstract

PAS(Plasma Activated Sintering) process was tried to apply for the fabrication of BMG(Bulk Metallic Glasses) of $Ni_{57}Zr_{20}Ti_{18}Si_5}\;and\;Ni_{57}Zr_{20}Ti_{18}Si_3Sn_2$ from the as-atomized amorphous powder. Compressive strength for the BMG(bulk Metallic Glasses) of $Ni_{57}Zr_{20}Ti_{18}Si_5$ were lower than those of BMG rods produced by warm extrusion ,or copper mold casting method. Microstructural examination by optical microcope, SEM ana EDS showed that oxidation had occurred during PASintering. In order to prevent the powder from the oxidation during PASintering, Ni coating for $Ni_{57}Zr_{20}Ti_{18}Si_5$ amorphous powder by electroless-plating method was performed. Microstructural examination for Ni coated layers after PASintering indicated that the Ni coating had been so effective to prevent powder from oxidation during PASintering. Sintering behaviors of $Ni_{57}Zr_{20}Ti_{18}Si_3Sn_2$ represent the same as those of $Ni_{57}Zr_{20}Ti_{18}Si_5$.

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References

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