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Investigation of Antiwear Coatings Deposited by the PVD Process

机译：PVD工艺沉积的抗磨涂层的研究

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The tribological properties of various PVD-deposited coatings (vacuum arc method) have been tested, both single-layer coatings (TiN, CrN, Ti(C,N), and Cr(C,N)) and multilayer coatings (Cr(C,N)/CrN/Cr and CR(C,N)/(CrN+Cr_2N)/CrN/Cr). An un-lubricated ball-on-disc tribosystem was used in which an Al_2O_3 ball is pressed against a coated steel disc rotating in the horizontal plane. A novelty of the method is the removal of wear debris from the contact zone using a draught of dry argon. This improves the repeatability of the test results and the stability of the tribological characteristics. It is shown that CrN coatings exhibit the best antiwear properties and Ti(C,N) the worst. Multilayer coatings have better antiwear properties than single-layer ones. The friction coefficients for CrN and Cr(C,N) coatings are much smaller than for the commonly used TiN. A correlation has also been found between the physical properties of the coatings tested (adhesion of the coating to the substrate assessed in scratch tests, and coating hardness) and their antiwear properties. An improvement in coating-substrate adhesion results in wear reduction, while greater hardness (causing a coating embrittlenient increase and a change in the wear mechanism) brings about greater wear. There is no correlation between the physical properties and the friction coefficients of the coatings tested.
机译：已经测试了各种PVD沉积涂层（真空电弧法）的摩擦学性能，包括单层涂层（TiN，CrN，Ti（C，N）和Cr（C，N））和多层涂层（Cr（C ，N）/ CrN / Cr和CR（C，N）/（CrN + Cr_2N）/ CrN / Cr）。使用了一种非润滑的圆盘摩擦系统，其中将Al_2O_3球压向在水平面上旋转的涂层钢盘。该方法的新颖性是使用干燥的氩气从接触区去除磨损碎屑。这提高了测试结果的可重复性和摩擦学特性的稳定性。结果表明，CrN涂层具有最佳的抗磨性能，而Ti（C，N）的抗磨损性能最差。多层涂层比单层涂层具有更好的抗磨性能。 CrN和Cr（C，N）涂层的摩擦系数比常用的TiN小得多。还发现了所测试的涂层的物理性能（在划痕测试中评估的涂层对基材的粘附性和涂层硬度）与它们的抗磨性能之间的相关性。涂层与基材之间的粘附力的改善导致磨损的减少，而更大的硬度（导致涂层硬度的增加和磨损机理的改变）带来了更大的磨损。测试的涂层的物理性能与摩擦系数之间没有相关性。

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