• 文献标题:   Tribological performances of copper perrhenate/graphene nanocomposite as lubricating additive under various temperatures
  • 文献类型:   Article
  • 作  者:   WANG JH, ZHUANG WP, YAN TT, LIANG WF, LI T, ZHANG LX, WEI XY
  • 作者关键词:   copper perrhenate/graphene, nanocomposite, oil additive, various temperature, tribological performance
  • 出版物名称:   JOURNAL OF INDUSTRIAL ENGINEERING CHEMISTRY
  • ISSN:   1226-086X EI 1876-794X
  • 通讯作者地址:  
  • 被引频次:   4
  • DOI:   10.1016/j.jiec.2021.05.009 EA JUN 2021
  • 出版年:   2021

▎ 摘  要

Herein, copper perrhenate (Cu(ReO4)(2)) was synthesized using a micro-emulsion method and adhered to graphene (Gr) using an ultrasonic process. Then, the as-prepared Cu(ReO4)(2)/Gr composite was added into the synthetic oil as a lubricant additive with the help of ionic liquid to achieve enhanced dispersion stability within the base oil. The tribological performances of the Cu(ReO4)(2)/Gr additive were investigated using four-ball tests and the ball-on-disk reciprocating configuration under various temperatures. The potential lubrication mechanisms of the Cu(ReO4)(2)/Gr additive were performed using a series of characterization methods including XRD, Raman, SEM-EDS, TEM, DSC/TG, and XPS. The results of four-ball tests at room temperature indicated that the Cu(ReO4)(2)/Gr additive could substantially improve the tribological performances of the base oil. The smallest coefficient of friction (COF) and wear scar diameter (WSD) values were 0.068 and 495 mm, respectively, when 0.05 wt% of Cu(ReO4)(2)/Gr was added. Additionally, the graphene accelerated friction-induced heat transfer, which led to decreased friction and wear. The results of reciprocating friction experiments at elevated temperatures revealed that the Cu(ReO4)(2)/Gr additive had excellent friction-reduction properties when the temperature was high. This could be attributed to the generation of a protective layer containing tribo-oxides from the alloy, some residual carbides and copper perrhenate induced by friction heat and stress. This protective layer was uniformly and stably covered on the worn surface, which could effectively alleviate direct contact between the rubbing pair. (C) 2021 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.