Friction and wear properties in dry, water- and oil-lubricated DLC against alumina and DLC against steel contacts
Friction and wear properties in dry, water- and oil-lubricated DLC against alumina and DLC against steel contacts
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DOI：
10.1016/s0043-1648(98)00314-7
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发表时间：
1998-11
期刊：
影响因子：
5
通讯作者：
H. Ronkainen;Simo Varjus;K. Holmberg
中科院分区：
文献类型：
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作者：
H. Ronkainen;Simo Varjus;K. Holmberg
类金刚石碳（DLC）膜根据其氢含量可分为两大类。这些类别在摩擦学性能方面具有相似性，但在不同的摩擦学条件下，薄膜也以不同的方式表现。本文报道了非晶氢化碳膜（a-C：H）和无氢硬碳膜（a-C）的研究结果。采用射频等离子体技术制备了a-C：H薄膜，采用脉冲真空电弧法制备了无氢硬碳薄膜。对涂层在干燥（50%RH）、水润滑和油润滑的缓慢滑动条件（0.004 m s-1）下的摩擦学性能进行了表征和研究。a-C和a-C：H薄膜在干摩擦条件下具有较低的摩擦系数（0.15 ~ 0.22），在边界润滑条件下摩擦系数进一步降低10-40%。在干摩擦条件下，a-C：H（Ti）薄膜具有良好的自润滑性能（0.10），在水润滑和油润滑条件下，a-C薄膜的摩擦系数最低（0.03和0.08）。无氢硬碳膜在干、水和油润滑条件下具有优异的耐磨性，但氢化a-C：H膜在水润滑条件下磨损严重。钛合金化可以改善a-C：H薄膜的性能。在干摩擦条件下，DLC膜摩擦层的形成影响摩擦磨损性能，而在油润滑条件下，DLC膜摩擦层的形成决定了摩擦学机理。
Diamond-like carbon (DLC) films can be divided into two major categories according to their hydrogen content. These categories have similarities in tribological performance, but the films also behave in a different manner in different tribological conditions. The results of amorphous hydrogenated carbon films (a-C:H) and hydrogen-free hard carbon films (a-C) are reported in this study. The a-C:H films were deposited using the radio frequency (rf) plasma technique, and the hydrogen-free hard carbon films using pulsed vacuum arc. The coatings were characterized and investigated with respect to their tribological performance in dry (50% RH), water-lubricated and oil-lubricated slow sliding conditions (0.004 m s−1). The a-C and a-C:H films had a low friction coefficient in dry sliding conditions (0.15 to 0.22), which was further decreased by 10–40% under boundary lubrication. The a-C:H(Ti) films exhibited good self-lubricating properties (0.10) in dry sliding conditions and the a-C films had the lowest friction coefficient in water- (0.03) and oil-lubricated (0.08) conditions. The hydrogen-free hard carbon films showed excellent wear resistance in dry, water- and oil-lubricated conditions, but hydrogenated a-C:H films suffered from severe wear in aqueous conditions. The performance of a-C:H films could be improved by titanium alloying. In dry sliding conditions, the tribolayer formation of DLC films influenced the friction and wear performance, but in oil-lubricated conditions boundary lubrication layers were formed, which governed the tribological mechanisms in the contact.