Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Effects of Amorphous Phase Fraction on the Scratch Response of NiTiZrSiSn Bulk Meatllic Glass in the Kinetic Spraying Process

저온분사공정을 통한 NiTiZrSiSn 벌크 비정질 코팅의 비정질 분율에 따른 스크래치 반응

  • Yoon, Sang-Hoon (Kinetic spray coating laboratory, Division of Materials Science & Engineering, College of Engineering, Hanyang University) ;
  • Kim, Soo-Ki (Kinetic spray coating laboratory, Division of Materials Science & Engineering, College of Engineering, Hanyang University) ;
  • Lee, Chang-Hee (Kinetic spray coating laboratory, Division of Materials Science & Engineering, College of Engineering, Hanyang University)
  • 윤상훈 (한양대학교 신소재공학부 저온 분사 코팅 연구실) ;
  • 김수기 (한양대학교 신소재공학부 저온 분사 코팅 연구실) ;
  • 이창희 (한양대학교 신소재공학부 저온 분사 코팅 연구실)
  • Published : 2007.06.30
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Abstract

A bulk amorphous NiTiZrSiSn powder produced using an inert gas atomization was sprayed by kinetic spraying process that is basically a solid-state deposition process onto a mild steel substrate. They were successfully overlaid onto the mild steel substrate. In order to evaluate the tribological behavior of the kinetic sprayed NiTiZrSiSn BMG (Bulk Metallic Glass) coatings, a partially crystallized coating and a fully crystallized coating were prepared by the isothermal heat treatments. Tribological behaviors were investigated in view of friction coefficient, hardness and amorphous phase fraction of coating layer. Surface morphologies and depth in the wear tracks were observed and measured by scanning electron microscope and alpha-step. From the examination of the scratch wear track microstructure, transition from the ductile like deformation (micro cutting) to the brittle deformation (micro fracturing) in the scratch groove was observed with the increase of the crystallinity.

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References

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