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首页> 外文会议>World Tribology Congress III vol.1; 20050912-16; Washington,DC(US) >THE ROLE OF TRIBOFILM EVOLUTION ON TRIBOLOGICAL BEHAVIOUR OF TI_3SIC_2 CERAMIC
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THE ROLE OF TRIBOFILM EVOLUTION ON TRIBOLOGICAL BEHAVIOUR OF TI_3SIC_2 CERAMIC

机译：三膜进化对TI_3SIC_2陶瓷的摩擦学行为的作用

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摘要

The Ti_3SiC_2 compound is a thermodynamically stable nano-layered ternary carbide, that belongs to a family of over 50 ternary carbides and nitrides, so-called MAX phases. These phases are a new class of solids that possess a unique combination of properties: they are readily machinable, relatively soft for ceramics, but elastically stiff, and electrically and thermally conductive. However, only very few studies are dedicated to their tribological behavior. This paper presents some results on the tribological behavior of Ti_3SiC_2. During dry sliding on a Ti_3SiCL_2 plane, a first regime of low friction and mild wear can be observed, with the build-up of a tribofilm on the counterface. Then, while in an apparently steady state, the tribological behavior suddenly turns to higher friction and severe wear of both counterfaces. Combining friction experiments and topographical observations of contacting surfaces during the first regime, we propose some explanations for such drastic transition in tribological behavior. While tribofilm thickness and roughness stabilize in the mild wear regime, the covering of the ball surface still increases. Thus, matter accumulation on the ball finally leads to seizure of the contact.
机译：Ti_3SiC_2化合物是一种热力学稳定的纳米层三元碳化物，属于50多种三元碳化物和氮化物的族，即所谓的MAX相。这些相是一类新型的固体，具有独特的性能组合：它们易于机械加工，对陶瓷而言相对较软，但具有弹性，并且具有导电和导热性。但是，只有很少的研究致力于其摩擦学行为。本文介绍了有关Ti_3SiC_2的摩擦学行为的一些结果。在Ti_3SiCL_2平面上干滑动期间，可以观察到低摩擦和轻度磨损的第一种状态，并且在对面上形成了摩擦膜。然后，虽然处于明显的稳定状态，但摩擦学行为突然转变为两个相对表面的较高摩擦和严重磨损。结合摩擦实验和接触状态在第一过程中的形貌观察，我们对这种摩擦行为的急剧转变提出了一些解释。虽然摩擦膜的厚度和粗糙度在轻度磨损状态下稳定，但球表面的覆盖率仍然增加。因此，物质在球上的积累最终导致咬合的发生。

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