Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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Analysis of Wear Properties for $Ni_{3}Al$ Layer coated on Ferrous Materials by Diffusion Treatment after Combustion Synthesis at low Temperature

저온 연소합성 후 확산 열처리한 $Ni_{3}Al$ 금속간화합물 코팅층의 미끄럼 마모거동

  • Lee, Han-Young (Department of Advanced Materials Engineering, Keimyung University)
  • Published : 2009.02.28
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Abstract

Coating brittle intermetallic compounds on metal can enlarge the range of their use. It is found that intermetallic compound coating layers made by only combustion synthesis in an electric furnace have porous multi-phase structures containing several intermediate phases, even though the coating layers show good wear resistance. In this study, dense $Ni_{3}Al$ single phase layer corresponding to the initial composition of the mixed powder is coated on two different ferrous materials by the diffusing treatment after combustion synthesis. After- ward, sliding wear behaviors of the coating layer are evaluated in comparison with that of the coating layer with porous multi-phase structure made by only combustion synthesis. As a result, the wear properties of the coating layer composed of dense $Ni_{3}Al$ single phase are considerably improved at the range of low sliding speed com- pared with that of the coating layer with porous multi-phase structure, particularly in the running-in wear region. This is attributed to the fact that wear of the coating layer is progressed by shearing as a sequence of adhesion, not by occurring of pitting on the worn surface due to having dense structure without pores.

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References

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