纳米氧化锌和层状 GO 对基于 MoS2 的异质结复合润滑涂层高温摩擦学性能的影响

IF 3.5 3区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Xibo Shao, Xun Wu, Hongliang Liu, Pei Wang, Cheng-feng Du, Long Wang, Haifeng Wang, Jun Yang
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引用次数: 0

摘要

二硫化钼(MoS2)作为真空和惰性气体环境下的优良固体润滑剂,在高温下容易被氧化,导致润滑性能严重下降甚至失效。引入掺杂相或复合相可以在一定程度上改善 MoS2 基润滑涂层的高温润滑性能。本文研究了纳米氧化锌(ZnO)和层状氧化石墨烯(GO)对 MoS2 基复合润滑涂层高温(400、450 和 500 ℃)摩擦学性能的影响。结果发现,几乎在所有试验条件下,MoS2-ZnO 复合涂层的摩擦学性能都是最好的,平均摩擦系数和磨损率分别约为 0.25 ~ 0.27 和 4 ~ 6 × 10-5 mm3/Nm。MoS2-ZnO 复合涂层之所以具有良好的摩擦学性能,是因为 ZnO 可减轻 MoS2 的氧化作用并形成 ZnS。形成的 ZnS、纳米氧化锌和少量 MoS2 发挥了协同润滑作用。然而,层状 GO 的引入会恶化基于 MoS2 的复合涂层的摩擦学性能,原因是 GO 在高温下分解并形成坚硬的磨料颗粒。这些结果可为设计和制备基于 MoS2 的复合润滑涂层提供参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of nano-particles ZnO and layered GO on high temperature tribological performance of MoS2-based heterojunction composite lubricating coating

As an excellent solid lubricant in vacuum and inert gas environment, molybdenum disulfide (MoS2) is easy to be oxidized in high temperature, which leads to serious deterioration or even failure of lubricating performance. The introduction of doped phase or composite can improve the high temperature lubricating performance of MoS2-based lubricating coating to some extent. In this work, the effect of nano-particles zinc oxide (ZnO) and layered graphene oxide (GO) on the high temperature (400, 450 and 500 °C) tribological properties of MoS2-based composite lubricating coatings were studied. It was found that the tribological performance of MoS2-ZnO composite coating were the best for almost all test conditions, and the average friction coefficient and wear rate were about 0.25 ~ 0.27 and 4 ~ 6 × 10−5 mm3/Nm, respectively. The promising tribological performance of MoS2-ZnO composite coating was attributed to the ZnO that mitigated the oxidation of MoS2, and the formation of ZnS. It is the formed ZnS, nano-ZnO and a small amount of MoS2 that provided synergistic lubrication. However, the introduction of layered GO deteriorated the tribological properties of the MoS2-based composite coating, due to the high-temperature decomposition of GO and the formation of hard abrasive particles. The results can provide reference for the design and preparation of MoS2-based composite lubricating coating.

Graphical abstract

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来源期刊
Journal of Materials Science
Journal of Materials Science 工程技术-材料科学:综合
CiteScore
7.90
自引率
4.40%
发文量
1297
审稿时长
2.4 months
期刊介绍: The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.
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