Tribology and Lubricants

Korean Tribology Society (한국트라이볼로지학회)
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A Study for Ni-Al based Intermetallics Coating onto Aluminum Substrate by Induction Heating

고주파 유도가열을 통한 알루미늄 기판재위 Ni-Al계 금속간화합물의 연소합성코팅에 관한 연구

  • Lee, Han-Young (Dept. of Advanced Materials Engineering, Keimyung University)
  • Received : 2012.01.25
  • Accepted : 2012.02.28
  • Published : 2012.04.30
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Abstract

In order to investigate the possibility of Ni-Al based intermetallics coating onto aluminum substrate, the coating process for induction heating has been evaluated by microscopically analyzing the intermetallic layers coated at temperatures lower than the melting temperature of aluminum. The coating layers were divided into two parts with different microstructure along the depth. Hard $NiAl_3$ layer was found at lower parts of the coatings near the interface with aluminum substrate. This layer was formed by the diffusion of aluminum atoms from the substrate into the coating layer across the interface during the induction heating. Meanwhile, at the upper parts of the coating near the surface, a large amount of un-reacted Ni was still remained and surrounded by several Ni-Al based intermetallic compounds, such as $Ni_3Al$, NiAl and $Ni_2Al_3$ formed by the lattice diffusion.

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References

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