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首页> 外文期刊>Journal of Materials Engineering and Performance >A Study of the Frictional Layer of TiAl-12Ag-5TiB(2) Composite During Dry Sliding Wear
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A Study of the Frictional Layer of TiAl-12Ag-5TiB(2) Composite During Dry Sliding Wear

机译：干滑动磨损过程中TiAl-12Ag-5TiB（2）复合材料的摩擦层研究

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摘要

Many studies have shown that the excellent tribological properties of materials are primarily attributed to the formation of expected frictional layer on the worn surface. This article is dedicated to explore the possible formation and acting mechanism of frictional layer of TiAl-12Ag-5TiB(2) composite. At normal load of 12 N, a frictional layer that consists of wear-induced layer and plastic deformation layer is observed. The soft wear-induced layer supported by the harder plastic deformation layer leads to the low friction coefficient and high wear resistance. The harder plastic deformation layer is induced by repetitive tribo-contact and considerable plastic deformation. Its high hardness improves the wear resistance of composite, and fine-grained structure promotes the diffusion of lubricating phase during dry friction process. The soft wear-induced layer can be divided into tribofilm and mechanically mixed layer. The mechanically mixed layer that consists of Ag and Ti-Al Oxides can continuously be provided to the worn surface to form a tribofilm with low shearing stress junctions, lowering the friction coefficient.
机译：许多研究表明，材料的优异摩擦学性能主要归因于在磨损表面上形成了预期的摩擦层。本文致力于探讨TiAl-12Ag-5TiB（2）复合材料摩擦层的可能形成和作用机理。在12 N的正常载荷下，观察到一个由磨损引起的层和塑性变形层组成的摩擦层。由较硬的塑性变形层支撑的软磨损层导致低摩擦系数和高耐磨性。反复摩擦接触和相当大的塑性变形会导致较硬的塑性变形层。高硬度提高了复合材料的耐磨性，细粒结构促进了干摩擦过程中润滑相的扩散。引起柔软磨损的层可分为摩擦膜和机械混合层。由Ag和Ti-Al氧化物组成的机械混合层可以连续地提供到磨损的表面上，以形成具有低剪切应力接点的摩擦膜，从而降低了摩擦系数。

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