Friction and Wear Mechanism Under Extreme Environments

A special issue of Lubricants (ISSN 2075-4442).

Deadline for manuscript submissions: 30 April 2025 | Viewed by 663

Special Issue Editor


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Guest Editor
State Key Laboratory of Tribology in Advanced Equipment, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
Interests: high-temperature lubrication technology; lubricating mechanism

Special Issue Information

Dear Colleagues,

With the rapid development of the aviation, aerospace, and cutting-edge equipment manufacturing industries, there are increasingly stringent performance requirements for mechanical equipment and their components. The service conditions for moving parts have become progressively more demanding, with extreme environments involving high temperatures, high speeds, and heavy loads that are more likely to result in lubrication failure at mechanical interfaces. Such failures can lead to abnormal wear and, in severe cases, equipment breakdown. Ensuring effective lubrication of moving interfaces in high-temperature environments is crucial for maintaining the safe operation of components and enhancing the reliability and longevity of equipment systems. Despite technological breakthroughs in high-temperature lubrication technologies and high-temperature-resistant alloys, research on lubrication material systems under extreme working conditions remains insufficient. There is a critical need for further investigation into the mechanisms of friction and wear at high temperatures and in extreme environments.

We are honored to collaborate with the editorial team of Lubricants to launch a Special Issue entitled “Friction and Wear Mechanism Under Extreme Environments”, which aims to advance our understanding of tribology under extreme working conditions. This Special Issue will focus on tribological research related to aerospace, industrial applications, vehicles, and other fields where components are exposed to special working conditions, particularly high temperatures. Topics will include the friction and wear behavior of bearings, gears, and other components under extreme conditions, such as high temperature and high pressure, as well as the latest developments in tribology for these challenging environments. We welcome all research related to tribology under special conditions and other relevant work for inclusion in this Special Issue.

Dr. Pengpeng Bai
Guest Editor

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Keywords

  • lubrication
  • high temperature
  • friction mechanism
  • tribology

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Published Papers (1 paper)

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Research

14 pages, 4258 KiB  
Article
Synergistic Tribological Performance of Phosphorus- and Sulfur-Based Extreme Pressure and Anti-Wear Additives
by Jingyu Wang, Jinhua Zheng, Jun Wang, Xiao Yao, Xing Xiong and Haipeng Huang
Lubricants 2025, 13(2), 55; https://doi.org/10.3390/lubricants13020055 - 28 Jan 2025
Viewed by 392
Abstract
Higher demands on extreme pressure lubrication performance are posed by stringent working conditions. In this study, the synergistic tribological properties of phosphate ammonium salt in combination with active sulfurized olefin (S1) and non-active sulfurized fatty acids (S2) were investigated to meet the needs [...] Read more.
Higher demands on extreme pressure lubrication performance are posed by stringent working conditions. In this study, the synergistic tribological properties of phosphate ammonium salt in combination with active sulfurized olefin (S1) and non-active sulfurized fatty acids (S2) were investigated to meet the needs under stringent working conditions. The anti-wear mechanisms were further explored using scanning electron microscopy (SEM) with EDS, X-ray photoelectron spectroscopy (XPS), X-ray absorption near-edge structure (XANES), and focused ion beam microscopy. The experimental results indicate that P-S2 demonstrates superior friction reduction and wear resistance under low loads, potentially attributable to its higher polarity, whereas P-S1 exhibits better wear resistance under high loads. P-S1 also shows superior extreme pressure performance attributed to its higher active sulfur content and stronger film-forming ability, evidenced by a thicker friction film (82.62 nm vs. 24.28 nm for P-S2). The study highlights that the variations in the synergistic tribological performance of phosphorus- and sulfur-based additives may link to differences in molecular structure, active sulfur content, polarity, and corrosiveness, with P-S1 demonstrating enhanced extreme pressure performance possibly through the formation of a multi-layered friction film of polyphosphate, sulfide, oligophosphate, and sulfate layers. Full article
(This article belongs to the Special Issue Friction and Wear Mechanism Under Extreme Environments)
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