Friction and wear properties of TiN,TiAlN, AlTiN and CrAlN PVD nitride coatings |
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| Affiliation: | 1. Christian Doppler Laboratory for Application Oriented Coating Development at the Institute of Materials Science and Technology, Vienna University of Technology, Vienna, Austria;2. Christian Doppler Laboratory for Application Oriented Coating Development at the Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, Leoben, Austria;3. Oerlikon Balzers Coating AG, Balzers, Liechtenstein;4. Plansee Composite Materials GmbH, Lechbruck am See, Germany;5. Institute of Materials Science and Technology, Vienna University of Technology, Vienna, Austria;1. School of Materials Science and Engineering, Anhui University of Technology, Maanshan City, Anhui Province 243002, PR China;2. Department of Advanced Materials Engineering, Chungbuk National University, Chungbuk, 641773, South Korea |
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| Abstract: | Four nitride coatings, TiN, TiAlN, AlTiN and CrAlN were deposited on YG6 (WC + 6 wt.% Co) cemented carbide by cathodic arc-evaporation technique. The friction and wear properties were investigated and compared using ball-on-disc method at high speed with SiC ball as a counter material. The tests were evaluated by scanning electron microscopy, X-ray diffractometer, energy dispersive X-ray, micro hardness tester and an optical profilometer. The results showed that TiN and TiAlN coatings presented lower friction coefficient and lower wear rate, and that high Al content AlTiN and CrAlN coatings didn't present better anti-wear properties in this test. Oxidation and abrasive wear were the main wear mechanism of TiN coating. In spite of the observation of micro-grooves and partial fractures, TiAlN possessed perfect tribological properties compared with the other coatings. High Al content increased the chemical reactivity and aroused severe adhesive wear of AlTiN coating. CrAlN coating presented better properties of anti-spalling and anti-adhesion, but abundant accumulated debris accelerated wear of the coating under this enclosed wear environment. |
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