Sliding wear resistance of reactive plasma sprayed Ti–TiN coatings |
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| Affiliation: | 1. Belarusian State University, 4 Nezavisimosti av., 220030 Minsk, Belarus;2. Institut P′, Département Physique et Mécanique des Matériaux, Université de Poitiers-CNRS-ENSMA, SP2MI, Téléport 2, F86962 Chasseneuil-Futuroscope, France;3. Kharkov Institute of Physics and Technology, 61108 Kharkov, Ukraine;4. Institute for Superhard Materials, NAS of Ukraine, 04074 Kiev, Ukraine;1. State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, PR China;2. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Materials, Lanzhou University of Technology, Lanzhou 730050, PR China;1. Institute for Solid State Physics, Kengaraga 8, LV-1063 Riga, Latvia;2. Center for Physical Sciences and Technology, Semiconductor Physics Institute, Go?tauto 11, LT-01108 Vilnius, Lithuania |
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| Abstract: | The reactive plasma spraying (RPS) of titanium powders in a nitrogen containing plasma gas produces thick coatings characterised by microdispersed titanium nitride phases in a titanium matrix. In this paper, the wear resistance properties of Ti–TiN coatings deposited on carbon steel substrates by means of RPS technique are studied. Wear tests were performed in block-on-ring configuration and dry sliding conditions, at different applied loads (45 and 100 N) and sliding velocities (in the range 0.4–2.0 m s?1) by using hardened and stress relieved AISI O2 disks as counterpart. At low applied load the wear volumes are low, and tend to slightly increase as the sliding velocity increases. At high applied load and low sliding velocities the highest wear volumes for the coated samples are observed, due to adhesion in the contact area with the tool steel counterpart and decohesion of coating particles. As the sliding velocity is increased, the wear volume of the coated samples tends to decrease owing to oxidation phenomena. |
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