材料科学
摩擦学
复合材料
摩擦学
聚酰亚胺
磨损(机械)
扫描电子显微镜
涂层
往复运动
复合数
陶瓷
图层(电子)
方位(导航)
地图学
地理
作者
Enzhu Hu,Enhao Su,Ayush Subedi,Shu‐Sheng Liu,Jianping Wang,Hexiang Zhong,Kunhong Hu
出处
期刊:Wear
[Elsevier]
日期:2023-10-01
卷期号:530-531: 205048-205048
被引量:5
标识
DOI:10.1016/j.wear.2023.205048
摘要
The comprehensive utilization of biomass resources is to be prepared into functional nanomaterial. This paper prepared carbon quantum dots (CQDs) using citric acid. A new CQDs/polyimide composites (CQDs/PI) coating fabricated on the surface of steel disks, has been widely used in bearing sleeve material or coatings in marine equipment parts and aerospace industries. Tribological properties of coating materials were investigated at different loads and reciprocating speeds of 10 mm/s under dry sliding conditions using a UMT-2 tribometer and compared to those of commercial MoS2 particles in PI composites. Scanning electron microscopy accompanied by energy spectroscopy (SEM/EDS) and 3D laser scanning microscopy were used to characterize the morphologies of the abrasion marks to clarify the tribological mechanisms. Results show that different levels of CQDs can improve composite coatings' anti-wear and friction reduction properties. The tribological mechanisms of CQDs were attributed to the enhancement of the hardness of the polyimide coatings by the CQDs and the formation of a transfer film on the surface of the ceramic balls during the friction process reducing the direct contact at the friction sub-interface.1
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