The effect of expanded graphite with sodium metasilicate as lubricant at high temperature

被引：43
作者：
Wang, Long [1 ]
Tieu, Anh Kiet [1 ]
Zhu, Hongtao [1 ]
Deng, Guanyu [1 ]
Hai, Guojuan [2 ]
Wang, Jun [1 ]
Yang, Jun [3 ]
机构：
[1] Univ Wollongong, Fac Engn & Informat Sci, Northfields Ave, Wollongong, NSW 2522, Australia
[2] Shaanxi Univ Sci & Technol, Sch Mat Sci & Engn, Xian 710021, Peoples R China
[3] Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
来源：
CARBON | 2020年 / 159卷 / 159期
基金：
澳大利亚研究理事会;
关键词：
DIAMOND-LIKE CARBON; TRIBOLOGICAL PROPERTIES; GRAPHENE-OXIDE; MACROSCALE SUPERLUBRICITY; WEAR; STEEL; FRICTION; EELS; DECOMPOSITION; INTERFACE;
D O I：
10.1016/j.carbon.2019.12.034
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Lubrication is vital in enabling the key machinery contact components to operate durably and reliably at extremely high temperatures for space aviation and metal forming. In this work, the expanded graphite in sodium metasilicate solution as high temperature lubricant was evaluated using a ball-on-disc tribometer. The results suggest that the use of this mixture can remarkably reduce the friction and wear of steel counterparts by up to 85% and 60% at 850 degrees C, respectively, compared with unlubricated condition. These improvements result from the formed tribo-layer containing amorphous carbon and sodium carbonate melt, as well as the two different ordered crystal layers on the rubbing interface induced by high temperature, pressure and shear. The expanded graphite in sodium metasilicate solution studied here for the first time will extend its application for high temperature lubrication due to its excellent performance. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：345 / 356
页数：12
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