KSTLE International Journal

Korean Tribology Society (한국트라이볼로지학회)
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Wear Mechanism of CrN Coating on Aluminum Alloys Deposited by AIP Method

  • Kim, Seock-Sam (School of Mechanical Engineering, Kyungpook National University) ;
  • Suh, Chang-Min (School of Mechanical Engineering, Kyungpook National University) ;
  • Murakami, Ri-ichi (Department of Mechanical Engineering, Tokushima University)
  • Published : 2002.06.01
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Abstract

Dry sliding wear and friction test of CrN coaling on two types of aluminum alloy substrates,6061 Al and 7075 Al deposited by arc ion plating, was peformed with a ball-on-disk tribometer. The effects of normal Bead and the mechanical properties of substrate on the friction coefficient and wear-resistance of CrN coating were investigated. The worn surfaces were observed by SEM. The results show that surface micro-hardness of CrN- coated 7075 Al is higher than that of CrN-coated 6061 Al. With an increase in normal lead, wear volume increases, while the friction coefficient decreases. The friction coefficient of CrN-coated 6061 Al is higher than that of CrN-coated 7075 Al, while the wear-resistance of CrN-coated 6061 Al is lower than the CrN-coated 7075 Al's, which indicates that the substrate mechanical properties have strong inf1uences on the friction coefficient and wear of CrN coating. The main wear mechanism was fragments of CrN coating, which were caused by apparent plastic deformation of substrate during wear test.

Keywords

References

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