Tribo-chemical wear of various 3d-transition metals against DLC: Influence of tribo-oxidation and low-shear transferred layer
Tribo-chemical wear of various 3d-transition metals against DLC: Influence of tribo-oxidation and low-shear transferred layer
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DOI：
10.1016/j.triboint.2022.107938
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发表时间：
2022-09
影响因子：
6.2
通讯作者：
Jae-Il Kim;Woo Y. Lee;T. Tokoroyama;M. Murashima;N. Umehara
中科院分区：
文献类型：
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作者：
Jae-Il Kim;Woo Y. Lee;T. Tokoroyama;M. Murashima;N. Umehara
类金刚石(DLC)具有优异的减摩耐磨性能，是一种很有发展前途的固体润滑剂。然而，DLC的高硬度导致了其两体磨损，通常是硬度较低的黑色金属和黄铜金属，导致了对偶件的严重磨损。因此，需要解决摩擦系统的磨损不平衡问题，从而导致摩擦系统的噪声和振动。在这项研究中，我们的目的是研究滑动副与DLC之间的磨损行为。根据碳和氧的化学性质，即氧化活化能和与碳的分离功，我们使用了四种三维过渡金属(钛、铁、镍和铜)作为类金刚石的对应物。我们的发现表明，过渡金属的磨损是由氧化磨损而不是机械磨损(如粘着磨损和磨粒磨损)决定的。此外，含碳摩擦膜是从DLC连续转移而来的，可防止其氧化磨损。结果表明，由于铜和铁的化学性质，导致了严重的氧化磨损。
Diamond-like carbon (DLC) is a promising solid lubricant owing to its excellent anti-friction and wear-resistance characteristics. However, the high hardness of DLC causes two-body abrasion to its counterpart, which generally are ferrous and brass metals having a relatively low hardness, resulting in severe wear of counterpart. Therefore, it is required to solve the wear-imbalance issue, leading to noise and vibration in tribo-system. In this study, we aimed to investigate the wear behavior of counterparts sliding against DLC. We used four-3d-transition metals (Ti, Fe, Ni, and Cu) as the counterpart of DLC, based on the chemical properties for carbon and oxygen, i.e., the activation energy of oxidation and work of separation with carbon. Our finding is suggested that the wear of transition metals was governed by oxidative wear rather than mechanical wear (e.g., adhesive wear and abrasive wear). Moreover, their oxidative wear was prevented by carbon-containing tribofilm, which is transferred from DLC continuously. It revealed that severe oxidational wear was caused in copper and iron, because of their chemical properties.