期刊
WEAR
卷 271, 期 5-6, 页码 775-782出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.wear.2011.03.011
关键词
Filtered cathodic arc; CrN coating; Mechanical property; Tribological property
资金
- United States Army Telemedicine and Advanced Technology Research Center (TATRC), U.S. Army Medical Research & Material Command [W81XWH-08-2-0023]
CrN coatings were deposited using a large area filtered cathodic arc deposition (LAFAD) technique from Cr targets under the atmosphere of pure N-2 at a pressure of 0.02 Pa and temperature of 350 degrees C. The mechanical and tribological properties of the CrN coatings were characterized using nanoindentation and pin-on-disk tribometer. The mechanical and tribological properties of the TIN coatings deposited by the same technique were also included as a reference. It was found that CrN coatings possess lower hardness and elastic modulus than that of the TiN coatings. As compared with TiN coatings, when tested against Al2O3 balls, CrN coatings exhibit much lower friction coefficient (0.39) and wear rate (1.3 x 10(-7) mm(3)/Nm), but the Al2O3 balls have much higher wear rate when tested against CrN coatings. When 302 stainless steel balls were used, both CrN and TiN coatings have similar friction coefficient, and the balls were seriously worn with a comparable wear rate when tested against the two coatings. No wear of CrN and TiN coatings could be seen. However, wear debris deposited on the coating surface with a similar deposition rate. The wear mechanisms of the CrN coatings are abrasion and adhesion wear, respectively, when tested against Al2O3 and 302 stainless steel balls. (C) 2011 Elsevier B.V. All rights reserved.
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