The aim of this work is to synthesis and characterize the Ta/TaN multilayer thin film coatings on... more The aim of this work is to synthesis and characterize the Ta/TaN multilayer thin film coatings on 52100 tool steel under three different levels of N2 gas flow rate. The High Power Impulse Magnetron Sputtering (HiPIMS) technique was used for the deposition of Ta/TaN thin film multilayers on the substrate. Microstructure, coating thickness, composition, hardness and tribological properties of Ta/TaN multilayer coatings were characterized using scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), microhardness tester and pin-on-disc tester, respectively. Adhesion property was evaluated via scratch testing of the thin film thin film layer. The lowest coefficient of friction was observed with the thin film layer of higher N2 gas flow rate due to the highest adhesion value of the coating on the surface. The obtained results on hardness, adhesion and coefficient of friction properties demonstrated that this Ta/TaN multilayer thin film coating can be used for tribological applications.
Journal of Coatings Technology and Research, May 7, 2009
MoS2 coatings are well-known for their solid lubricant properties and used as self-lubricants in ... more MoS2 coatings are well-known for their solid lubricant properties and used as self-lubricants in vacuum and inert gas environments, and such coatings are not used in atmospheric conditions because of their deteriorating tribology. The tribological performance of MoS2 solid lubricant coatings in the different atmospheres has been improved by the codeposition of a small amount of another metal. In this
Journal of Materials Engineering and Performance, Apr 12, 2021
In this study, MoS2 solid lubricant films were supported with crystalline TiNi films for the firs... more In this study, MoS2 solid lubricant films were supported with crystalline TiNi films for the first time in the literature to produce functional solid lubricant coatings. The structural, mechanical, and tribological properties of the produced coatings were investigated. The functional coatings were deposited on 52100 bearing steels by the Closed Field Unbalanced Magnetron Sputtering System (CFUBMS). SEM, XRD, EDS, and DSC analyses were used to obtain structural properties. A pin-on-disc Wear Test at atmospheric and high-temperature conditions was carried out to analyse the tribological behaviors of the coatings. The results showed that the TiNi/MoS2 functional coating had great tribological properties. S/Mo ratio and thickness and hardness values of the coatings directly affected tribological properties. The friction coefficients decreased as the S/Mo ratio of the coatings approached 1.5. Tribological properties generally increased as the hardness and thickness of the coatings increased. CoF values lower than 0.1 were obtained at atmospheric and high-temperature wear tests.
The aim of this work is to synthesis and characterize the Ta/TaN multilayer thin film coatings on... more The aim of this work is to synthesis and characterize the Ta/TaN multilayer thin film coatings on 52100 tool steel under three different levels of N2 gas flow rate. The High Power Impulse Magnetron Sputtering (HiPIMS) technique was used for the deposition of Ta/TaN thin film multilayers on the substrate. Microstructure, coating thickness, composition, hardness and tribological properties of Ta/TaN multilayer coatings were characterized using scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), microhardness tester and pin-on-disc tester, respectively. Adhesion property was evaluated via scratch testing of the thin film thin film layer. The lowest coefficient of friction was observed with the thin film layer of higher N2 gas flow rate due to the highest adhesion value of the coating on the surface. The obtained results on hardness, adhesion and coefficient of friction properties demonstrated that this Ta/TaN multilayer thin film coating can be used for tribological applications.
Journal of Coatings Technology and Research, May 7, 2009
MoS2 coatings are well-known for their solid lubricant properties and used as self-lubricants in ... more MoS2 coatings are well-known for their solid lubricant properties and used as self-lubricants in vacuum and inert gas environments, and such coatings are not used in atmospheric conditions because of their deteriorating tribology. The tribological performance of MoS2 solid lubricant coatings in the different atmospheres has been improved by the codeposition of a small amount of another metal. In this
Journal of Materials Engineering and Performance, Apr 12, 2021
In this study, MoS2 solid lubricant films were supported with crystalline TiNi films for the firs... more In this study, MoS2 solid lubricant films were supported with crystalline TiNi films for the first time in the literature to produce functional solid lubricant coatings. The structural, mechanical, and tribological properties of the produced coatings were investigated. The functional coatings were deposited on 52100 bearing steels by the Closed Field Unbalanced Magnetron Sputtering System (CFUBMS). SEM, XRD, EDS, and DSC analyses were used to obtain structural properties. A pin-on-disc Wear Test at atmospheric and high-temperature conditions was carried out to analyse the tribological behaviors of the coatings. The results showed that the TiNi/MoS2 functional coating had great tribological properties. S/Mo ratio and thickness and hardness values of the coatings directly affected tribological properties. The friction coefficients decreased as the S/Mo ratio of the coatings approached 1.5. Tribological properties generally increased as the hardness and thickness of the coatings increased. CoF values lower than 0.1 were obtained at atmospheric and high-temperature wear tests.
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