MoS2, single sheet lubrication by molybdenum dithiocarbamate
MoS2, single sheet lubrication by molybdenum dithiocarbamate
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DOI：
10.1016/s0301-679x(98)00094-2
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发表时间：
1998-12-01
影响因子：
6.2
通讯作者：
Inoue, K
中科院分区：
文献类型：
--
作者：
Grossiord, C;Varlot, K;Inoue, K
用分析摩擦学方法研究了Modtc在边界润滑条件下降低百分位摩擦的机理。首先，将SRV摩擦测试与磨损碎片的能量过滤TEM和磨痕内部的空间分辨XPS结合起来。其次，我们进行了超高真空摩擦测试Modtc摩擦膜先前创建的大面积。结果表明，MoDTC的减摩机理主要是MoS 2单层间的滑动效应，而不是MoS 2三维晶体内的滑动效应。高度分散的MoS 2片存在于摩擦膜材料中的碳基质中。2-D MoS 2单片的生长被认为是通过由摩擦过程激活的电子转移机制降解Modtc分子而形成的。未涂覆的固定配合面的润滑归因于单个片材朝向摩擦表面的连续转移。实际上，在这些条件下，仅百分之几的分散的MoS 2就足以以与纯MoS 2相同的水平润滑。(C)1999 Elsevier Science Ltd.保留所有权利。
The mechanisms by which Modtc reduces friction in the centirange under boundary lubrication have been investigated using analytical tribometry. First, the SRV friction test was coupled with energy-filtering TEM on wear fragments and spatially-resolved XPS inside the wear scars. Second, we performed UHV friction tests on Modtc tribofilms previously created on a large area. The overall data demonstrate that the mechanisms of friction-reduction by Modtc is attributed to the effect of sliding between single layers of MoS2 only, and not to intra-sliding in MoS2 3-D crystal. Highly-dispersed MoS2 sheets are present in a carbon matrix in the tribofilm material. The growth of the 2-D MoS2 single sheets is thought to be formed by degradation of the Modtc molecule by electron transfer mechanisms activated by the friction process. The lubrication of the uncoated, stationary counterface is attributed to successive transfer of individual sheets towards the friction surface. Practically, in these conditions only a few per cent of dispersed MoS2 is sufficient to lubricate at the same level as pure MoS2. (C) 1999 Elsevier Science Ltd. All rights reserved.