Tribological properties of WS2 nanoparticles under mixed lubrication
Tribological properties of WS2 nanoparticles under mixed lubrication
复制标题
DOI：
10.1016/s0043-1648(03)00044-9
复制
发表时间：
2003-08-01
期刊：
影响因子：
5
通讯作者：
Tenne, R
中科院分区：
文献类型：
--
作者：
Rapoport, L;Leshchinsky, V;Tenne, R
最近，它已被确定，WS2和二硫化钼纳米粒子（无机富勒烯类，IF）与油混合，并浸渍到粉末材料的多孔基质中出现在一定的负载范围内，以提高配合表面的摩擦学性能相比，典型的金属二硫属化物固体润滑剂。主要结果是在相对较低的压力下获得的。因此，在获得集中接触的情况下，评价IF的摩擦学性能具有重要意义。采用销盘试验机研究了混合润滑条件下油中IF的影响。充分的膜和粗糙接触分数之间的相互作用已被认为是和时间演变的摩擦力进行了评估。采用透射电子显微镜（TEM）、扫描电子显微镜（SEM）和X射线光电子能谱（XPS）研究了摩擦试验前后摩擦副表面和纳米粒子的状态。结果表明，IF纳米颗粒与油混合后，在混合润滑状态下，可以减少直微凸体接触的比例，从而提高其摩擦学性能。TEM分析表明，IF纳米粒子的形状在低负载下保持不变。结果发现，在最大载荷420 N的摩擦后，一些IF纳米颗粒被损坏。IF纳米石蜡似乎形成保护膜，允许增加摩擦对的负载能力。IF固体润滑剂作为第三机构的一部分的作用进行了讨论。探讨了纳米IF粒子的摩擦磨损机理。(C)2003 Elsevier Science B.V.保留所有权利。
Recently, it has been established that WS2 and MoS2 nanoparticles (inorganic fullerene-like, IF) mixed with oil, and impregnated into porous matrix of powdered materials appear to enhance the tribological properties of mating surfaces in definite loading range in comparison to typical metal dichalcogenide solid lubricants. The main results have been obtained under relatively low pressures. It is important to evaluate the tribological properties of IF when the concentrated contact is obtained. The effect of the IF in oil was studied using pin-on-disk tester in the regime of mixed lubrication. The interaction between the full film and the asperity contact fractions has been considered and the time evolution of the friction force was evaluated. The states of the mating surfaces and the nanoparticles before and after the friction test were studied by transmission electron microscopy (TEM), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). It was established that the IF nanoparticles mixed with oil allow to decrease the fraction of straight asperity contact under mixed lubrication regime and thus improve their tribological properties. TEM analysis showed that the shape of the IF nanoparticles is preserved under low loads. It was found that some of the IF nanoparticles were damaged after the friction at the maximal load of 420 N. The IF nanopaticles appear to form a protective film allowing increased load capacity of the rubbed pairs. The role of the IF solid lubricants as a part of a third body is discussed in this work. The mechanism of friction and wear of the IF nanoparticles are discussed. (C) 2003 Elsevier Science B.V. All rights reserved.