Abstract
The properties of the MoS2/Zr coatings can be significantly affected by the deposition temperature. In this study, the MoS2/Zr composite coatings were fabricated on the cemented carbide surface, utilizing the duplex deposition technology at various deposition temperatures. The effects of deposition temperature on the mechanical and friction properties of the MoS2/Zr coatings were systematically studied. Results exhibited that as the deposition temperature increased, the adhesion force increased first and then decreased, and the coating thickness and micro-hardness gradually increased. Dry sliding tests against a hardened steel ring showed that the tribological behaviors and wear mechanisms of the MoS2/Zr coatings varied with deposition temperature, which were due to the changing mechanical properties of coatings caused by the temperature. The coatings deposited at a temperature of 180 °C and 200 °C possessed preferable comprehensive mechanical and tribological properties.
Highlights
Materials 2021, 14, 5100. https://Surface coating technology is an efficient approach to enhance the friction and wear properties of substrate materials, and has been extensively applied in numerous engineering applications [1].The first generation coatings featured TiC [2], TiN [3,4], ZrN [5] and Al2 O3 [6,7] as the hard coatings, and were applied to improve the material durability in aggressive environments
The MoS2 /Zr composite coatings were deposited on a carbide sample
It can be seen that the coatings possessed fine and dense structures, which was probably attributed to the effect of Zr solution strengthening in the composite coatings [26,27,28]
Summary
Materials 2021, 14, 5100. https://Surface coating technology is an efficient approach to enhance the friction and wear properties of substrate materials, and has been extensively applied in numerous engineering applications [1].The first generation coatings featured TiC [2], TiN [3,4], ZrN [5] and Al2 O3 [6,7] as the hard coatings, and were applied to improve the material durability in aggressive environments. Surface coating technology is an efficient approach to enhance the friction and wear properties of substrate materials, and has been extensively applied in numerous engineering applications [1]. The development of material science and coating technology has resulted in the development of more advanced coatings, e.g., AlCrN [8], TiCN [9], TiAlN [10,11], TiAlSiN [12,13,14], which further improved the industry applications of coatings, owing to a much higher surface hardness with excellent wear resistance. Molybdenum disulphide (MoS2 ) is a widely applied solid lubricant with a hexagonal structure [15]. The mechanism of lubrication of MoS2 is due to the high adhesion to material surfaces and a low shear strength along the base plane of the hexagonal structure [18].
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