Polymer transfer film formation from cryogenic to elevated temperatures

IF 6.3 1区工程技术 Q1 ENGINEERING, MECHANICAL

Friction Pub Date : 2024-06-25 DOI:10.1007/s40544-024-0862-y

Kian Bashandeh, Vasilis Tsigkis, Ahmad Amiri, Pixiang Lan, Andreas A. Polycarpou

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Abstract

This study reports on the tribological performance of aromatic thermosetting co-polyester (ATSP) and polyether ether ketone (PEEK)-based polymer composite coatings mixed with PTFE filler. The coatings were tested across a wide temperature range from −180 to 110 °C to simulate the environmental temperatures on Titan, Moon, and Mars, which are of particular interest for NASA’s future exploratory missions. An experimental setup was developed to conduct the pin-on-disk experiments under dry sliding conditions and extreme temperature and contact pressure. Transfer film formation and its characteristics were found to play significant roles in the tribological performance, and the characteristics of the film were temperature-dependent. The XPS and SEM analysis indicated the increase of the PTFE content in the transfer film as the temperature decreased to cryogenic conditions. The coefficient of friction did not follow a linear trend with temperature and was minimum at 110 °C and maximum at −180 °C. ATSP coating showed superior performance with lower friction and unmeasurable wear at all temperatures, whereas PEEK coating exhibited maximum wear at 25 °C followed by −180, and 110 °C.

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从低温到高温的聚合物转移膜形成

这项研究报告了以芳香族热固性共聚酯（ATSP）和聚醚醚酮（PEEK）为基础的聚合物复合涂层与聚四氟乙烯填料混合后的摩擦学性能。这些涂层的测试温度范围很广，从 -180 ℃ 到 110 ℃，以模拟土卫六、月球和火星的环境温度。我们开发了一套实验装置，用于在干燥滑动条件、极端温度和接触压力下进行针盘实验。实验发现，转移膜的形成及其特性对摩擦学性能起着重要作用，而转移膜的特性与温度有关。XPS 和 SEM 分析表明，随着温度降低到低温条件，转移膜中的 PTFE 含量增加。摩擦系数与温度的关系不呈线性趋势，在 110 °C 时最小，在 -180 °C 时最大。ATSP 涂层表现出卓越的性能，在所有温度下都具有较低的摩擦系数和不可测量的磨损，而 PEEK 涂层在 25 °C 时磨损最大，其次是 -180 和 110 °C。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Friction Engineering-Mechanical Engineering

CiteScore

12.90

自引率

13.20%

发文量

324

审稿时长

13 weeks

期刊介绍： Friction is a peer-reviewed international journal for the publication of theoretical and experimental research works related to the friction, lubrication and wear. Original, high quality research papers and review articles on all aspects of tribology are welcome, including, but are not limited to, a variety of topics, such as: Friction: Origin of friction, Friction theories, New phenomena of friction, Nano-friction, Ultra-low friction, Molecular friction, Ultra-high friction, Friction at high speed, Friction at high temperature or low temperature, Friction at solid/liquid interfaces, Bio-friction, Adhesion, etc. Lubrication: Superlubricity, Green lubricants, Nano-lubrication, Boundary lubrication, Thin film lubrication, Elastohydrodynamic lubrication, Mixed lubrication, New lubricants, New additives, Gas lubrication, Solid lubrication, etc. Wear: Wear materials, Wear mechanism, Wear models, Wear in severe conditions, Wear measurement, Wear monitoring, etc. Surface Engineering: Surface texturing, Molecular films, Surface coatings, Surface modification, Bionic surfaces, etc. Basic Sciences: Tribology system, Principles of tribology, Thermodynamics of tribo-systems, Micro-fluidics, Thermal stability of tribo-systems, etc. Friction is an open access journal. It is published quarterly by Tsinghua University Press and Springer, and sponsored by the State Key Laboratory of Tribology (TsinghuaUniversity) and the Tribology Institute of Chinese Mechanical Engineering Society.