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http://dx.doi.org/10.5695/JKISE.2011.44.6.269

Tribology and Phase Evolution of Cr-Mo-N Coatings with Different Interlayer Condition  

Yang, Young-Hwan (Engineering Ceramic Center, KICET)
Lyo, In-Woong (CAE & Materials Research Team, Central Advanced Research & Engineering Institute, Hyundai & Kia Corporate Research & Development Division)
Park, Sang-Jin (Hyundai Hysco, Research and Development team)
Im, Dae-Sun (Department of Materials Science and Engineering, Korea University)
Oh, Yoon-Suk (Engineering Ceramic Center, KICET)
Publication Information
Journal of the Korean institute of surface engineering / v.44, no.6, 2011 , pp. 269-276 More about this Journal
Abstract
Phase evolution and tribological behavior of Cr-Mo-N multi compositional films with different interlayer were investigated. The films were deposited by hybrid PVD (Physical Vapor Deposition) system consisted of dc unbalanced magnetron (UBM) sputtering and arc ion plating (AIP) sources. A pure molybdenum (Mo) was used as sputtering target and also a pure Cr was used as AIP target to form the Cr-Mo-N films. Various growth planes were found, no textured surface, in all of the multi composition films. Maximum value of microhardness was measured in Cr-Mo-N film with Mo interlayer as 29 GPa. Composition film was mainly showed the aspect of the adhesive wear than CrN film. The friction coefficient was decreased from 0.6 for pure CrN coating to 0.35 for Cr-Mo-N film with Mo interlayer. This result may come from the formation of metal oxide tribo-layer which is known as solid lubricant during the wear test.
Keywords
Cr-Mo-N; Interlayer; Hybrid PVD; Tribology; Solid lubrication;
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