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Effect of phosphide additives on the tribological properties of polyethylsiloxane (PES) in Si3N4 and M50 system

Luo Yue (Department of Mechanical Engineering, State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing, China)
Yan Meng (School of Mechanical and Electrical Engineering, China University of Mining and Technology – Beijing, Beijing, China)
Eunji Lee (Department of Mechanical Engineering, State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing, China)
Pengpeng Bai (Department of Mechanical Engineering, State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing, China)
Yingzhuo Pan (School of Mechanical and Electrical Engineering, China University of Mining and Technology – Beijing, Beijing, China)
Peng Wei (Department of Mechanical Engineering, State Key Laboratory of Tribology in Advanced Equipment, Tsinghua University, Beijing, China)
Jie Cheng (School of Mechanical and Electrical Engineering, China University of Mining and Technology – Beijing, Beijing, China)
Yonggang Meng (Department of Mechanical Engineering, School of Mechanical Engineering, Tsinghua University, Beijing, China)
Yu Tian (State Key Laboratory of Tribology, Tsinghua University, Beijing, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 28 August 2024

Issue publication date: 29 October 2024

78

Abstract

Purpose

The incorporation of phosphide additives is regarded as a highly effective strategy for enhancing the lubricative qualities of base oils. This study aims to assess the lubrication behavior and efficacy of various phosphide additives in polyethylsiloxane (PES) through the employment of the Schwingum Reibung Verschleiss test methodology, across a temperature range from ambient to 300°C.

Design/methodology/approach

PES demonstrated commendable lubrication capabilities within the Si3N4/M50 system, primarily attributable to the Si-O frictional reaction film at the interface. This film undergoes disintegration as the temperature escalates, leading to heightened wear. Moreover, the phosphide additives were found to ameliorate the issues encountered by PES in the Si3N4/M50 system, characterized by numerous boundary lubrication failure instances. A chemical film comprising P-Fe-O was observed to form at the interface; however, at elevated temperatures, disintegration of some phosphide films precipitated lubrication failures, as evidenced by a precipitous rise in the coefficient of friction.

Findings

The results show that a phosphide reactive film can be formed and a reduction in wear rate is achieved, which is reduced by 64.7% from 2.98 (for pure PES at 300°C) to 1.05 × 10–9 μm3/N m (for triphenyl phosphite at 300°C).

Originality/value

The data derived from this investigation offer critical insights for the selection and deployment of phosphide additives within high-temperature lubrication environments pertinent to PES.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-04-2024-0139/

Keywords

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 52275198) and Postdoctoral Fellowship Program of CP SF (No. GZC20231287).

The authors declare no competing financial interest.

Luo Yue and Yan Meng contributed equally to this work.

Citation

Yue, L., Meng, Y., Lee, E., Bai, P., Pan, Y., Wei, P., Cheng, J., Meng, Y. and Tian, Y. (2024), "Effect of phosphide additives on the tribological properties of polyethylsiloxane (PES) in Si3N4 and M50 system", Industrial Lubrication and Tribology, Vol. 76 No. 9, pp. 1025-1035. https://doi.org/10.1108/ILT-04-2024-0139

Publisher

:

Emerald Publishing Limited

Copyright © 2024, Emerald Publishing Limited

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