An investigation of tribological properties of CN and TiCN coatings
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Today the tool industry on a worldwide basis uses hard, wear-resistant, and low-friction coatings produced by different processes such as electrochemical or electroless methods, spray technologies, thermochemical, chemical-vapor deposition (CVD), and physical vapor deposition (PVD). In the current work, two different coatings, nitrocarburized (CN) and titanium carbonitride (TiCN) on M2-grade tool steel, were prepared by commercial diffusion and PVD techniques, respectively. Properties such as thickness, roughness, and hardness were characterized using a variety of techniques, including glow-discharge optical emission spectrometry (GD-OES) and scanning electron microscopy (SEM). A crossed-cylinders wear-testing machine was used to investigate the performances of both coatings under lubrication. The effect of coatings on the performance of lubricants under a range of wear-test conditions was also examined. Degradation of lubricants during tribological testing was explored by Fourier transform infrared (FTIR) spectroscopy.
KeywordsCN coatings crossed cylinders lubricants TiCN tribology
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- 1.B. Bhushan and B.K. Gupta: Handbook of Tribology—Materials, Coatings, and Surface Treatments, Krieger Publishing Co., Malabar, FL, 1997, p. 6.1.Google Scholar
- 2.G.W. Stachowiak: “Tribology of Wear Resistant Surfaces,” Mater. Forum, 1998, 22, pp. 63–77.Google Scholar
- 4.B. Bhushan: Tribology and Mechanics of Magnetic Storage Devices, Springer-Verlag, New York, 1990.Google Scholar
- 6.B. Mills and A.H. Redford: “Wear Testing of Die Materials Rubbing Against Aluminium and Copper,” Ann. CIRP, 1979, 28, pp. 165–69.Google Scholar
- 10.B. Bhushan and B.K. Gupta: Handbook of Tribology—Materials, Coatings, and Surface Treatments, Krieger Publishing Co., Malabar, FL, 1997, p. 2.1.Google Scholar
- 11.J. Slycke and L. Sproge: “Kinetics of the Gaseous Nitrocarburising Process,” Surf. Eng., 1989, 5, pp. 125–40.Google Scholar
- 13.J.P. Coates and L.C. Setti: “Infrared Spectroscopic Methods for the Study of Lubricant Oxidation Products,” ASLE Trans., 1986, 29, pp. 394–401.Google Scholar