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Tribological Characterisation of a-C:H Coatings at Room Temperature: Effect of Counterbody Material

机译：室温a-C：H涂层的摩擦学表征：配体材料的影响

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摘要

Metal-free amorphous carbon (a-C:H) coatings with 15% hydrogen were deposited on bearing steel surfaces. The friction and wear performance of these specimens was characterised in oscillating sliding tests with a ball-on-flat geometry. Balls of four ceramiC and four metallic materials were investigated in tests at room temperature. Special attention was paid to the effect of moisture by testing in dry, normal, and moist air. The effect of water vapour on the friction and wear of the a-C:H coatings was quite different for the different counterbody materials. The wear was in all cases very low, with a coefficient of wear below 10~(-7) mm~3/N m for most cases. The coefficient of friction was also very low, between 0.04 and 0.12 for most of the tests. The smallest wear and friction coefficients were found for oxide ceramics, while during tests against SiC and Si_3N_4 the coating was worn through during the test. The effects of counterbody material and the humidity of the surrounding air are discussed in terms of friction and wear mechanisms.
机译：含15％氢的无金属无定形碳（a-C：H）涂层沉积在轴承钢表面上。这些样品的摩擦和磨损性能通过具有平面滚珠几何形状的振动滑动试验来表征。在室温下测试了四种陶瓷和四种金属材料的球。通过在干燥，正常和潮湿的空气中进行测试，特别注意了水分的影响。对于不同的配体材料，水蒸气对a-C：H涂层的摩擦和磨损的影响是完全不同的。在所有情况下，磨损都非常低，在大多数情况下，磨损系数低于10〜（-7）mm〜3 / N m。摩擦系数也非常低，在大多数测试中介于0.04和0.12之间。发现氧化物陶瓷的磨损和摩擦系数最小，而在针对SiC和Si_3N_4的测试过程中，涂层在测试过程中被磨损了。通过摩擦和磨损机理讨论了配体材料和周围空气湿度的影响。

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