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Tribology Letters

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01-09-2021 | Original Paper

Tribological Properties of SiO₂@Cu and SiO₂@MoS₂ Core–Shell Microspheres as Lubricant Additives

Authors: Xiaoliang Ma, Chaoliang Gan, Xiaopeng Li, Yuting Li, Peng Feng, Xiaoqiang Fan, Xiangyuan Ye, Minhao Zhu

Published in: Tribology Letters | Issue 3/2021

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Abstract

Herein, core–shell structural SiO₂@Cu and SiO₂@MoS₂ microspheres were prepared using SiO₂ as hard core, Cu and MoS₂ as shell. As lubricant additives were introduced into base oil (PAO 40), their friction reduction and wear resistance were investigated in detail. Comparing with onefold additive (SiO₂, Cu and MoS₂), such core–shell structural additives can improve the tribological behaviors at the Hertz contact stress range of 1.26–2.72 GPa (SiO₂@Cu reduces the friction and wear up to 32.47% and 67.86% at 2.72 GPa, respectively). Besides, the tribological properties of SiO₂@Cu microspheres are superior to that of SiO₂@MoS₂ (the wear volume was reduced by 48.45% at 2.72 GPa). The excellent tribological behaviors of SiO₂@Cu microspheres can be ascribed to its structural advantage, the synergistic effect of hard SiO₂ core and Cu shell. The rolling effect of SiO₂, easy-shearing and self-repairing of Cu shell offer a synergistic lubrication function and form a dense protection film, thereby contributing to the optimal lubrication performance.

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previous article Short Chain Imidazolium Ionic Liquids: Synthesis and Oil Miscibility in Various Base Oil by use of Surfactant as High Performance Friction and Antiwear Lubricant Additive

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Title: Tribological Properties of SiO2@Cu and SiO2@MoS2 Core–Shell Microspheres as Lubricant Additives
Authors: Xiaoliang Ma
Chaoliang Gan
Xiaopeng Li
Yuting Li
Peng Feng
Xiaoqiang Fan
Xiangyuan Ye
Minhao Zhu
Publication date: 01-09-2021
Publisher: Springer US
Published in: Tribology Letters / Issue 3/2021
Print ISSN: 1023-8883
Electronic ISSN: 1573-2711
DOI: https://doi.org/10.1007/s11249-021-01483-1

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