Wear life mechanism of journal bearings with bonded MoS2 film lubricants in air and vacuum
Wear life mechanism of journal bearings with bonded MoS2 film lubricants in air and vacuum
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DOI：
10.1016/s0043-1648(01)00845-6
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发表时间：
2001-11
期刊：
影响因子：
5
通讯作者：
Naofumi Hiraoka
中科院分区：
文献类型：
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作者：
Naofumi Hiraoka
在空气和真空中对轴和轴瓦上涂有 MoS2 薄膜润滑剂的轴颈轴承进行了振动摩擦和磨损寿命测试。当轴承寿命结束时，薄膜部分地从附近的基底上剥离，而不是磨损。真空中的磨损寿命比空气中长几十倍，真空中的摩擦系数约为空气中的四分之一。通过计算薄膜和基材界面处的剪切应力，考虑摩擦，可以将空气和真空中的磨损寿命绘制在统一的 S-N 曲线上。这意味着，无论气氛如何，薄膜的疲劳脱粘是主要机制，并且相对于气氛的磨损寿命的差异归因于摩擦大小的差异。
Friction and wear life tests on the oscillation motion of journal bearings with bonded MoS2film lubricants on both the shafts and bearing bushes were carried out in air and in vacuum. The film partially debonded from the near substrate rather than wore out when the lives of the bearings ended. The wear lives in vacuum were several tens of times longer than those in air, and the friction coefficient in vacuum was about a quarter of that in air. By calculating shear stresses at the interfaces of the films and substrates, considering friction, wear lives in air and in vacuum could be plotted on a unified S–N curve. This means that the fatigue debonding of the film is a predominant mechanism, irrespective of the atmosphere, and the difference in the wear lives with respect to the atmosphere is attributed to the difference in the friction magnitude.