Effects of intrinsic mechanical properties on the dynamic bonding strength of GLC films undergoing ball bearing contact fatigues

文献类型： 外文期刊

第一作者： Wang, Zhe

作者： Wang, Zhe;Ma, Dayan;Jiang, Xudong;Wang, Yijiao;Wang, Hongbo;Li, Zhendong

作者机构：

关键词： DCMS; Failure mechanism; Graphite-like carbon films; Mechanical properties; Interlayer

期刊名称：DIAMOND AND RELATED MATERIALS （ 影响因子：4.1； 五年影响因子：3.6 ）

ISSN： 0925-9635

年卷期： 2023 年 136 卷

页码：

收录情况： SCI

摘要： Wear-resistant films, which are widely applied to extend the service life of the gears and bearings, usually surfer from dynamic bonding fatigue failure induced by the Hertz-like contact. However, there is still lack of research on the influence of the main mechanical parameters of films on the dynamic bonding fatigue failure mechanism. In this work, graphite-like carbon (GLC) films with a low friction coefficient and different Ti doping ratios were deposited on the surface of stainless steel via direct current magnetron sputtering (DCMS) technology. The microstructure and mechanical properties of the films before and after vacuum annealing were investigated by SEM, Raman, and nanoindentation, and the dynamic bonding failure life of the films were evaluated by the ballbearing-disc method with dynamic contact fatigue loads. The results revealed that the critical dynamic bonding strength exhibited a significant function dependence on the values of hardness-to-elastic modulus (H3/E2) parameters of the GLC films. The film failure mechanism showed a transition from the film/substrate interface spalling mode to the near-surface cohesion shear spalling mode with the increase of H3/E2.

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