Tribological Investigation on WC/C Coatings Applied on Bearings Subjected to Fretting Wear

IF 2.9 3区 工程技术 Q2 ENGINEERING, CHEMICAL
B. Pinedo, G. Mendoza, A. López-Ortega, C. Zubizarreta, L. Mendizabal, S. Fraile, L. Ionescu
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Abstract

This study investigates the capability of WC/C coatings to protect bearing bores against fretting wear when there is a lack of lubrication, a typical failure mechanism in bearings subjected to vibrations. Linear pin-on-disc and rotary oscillating block-on-ring tribological tests were carried out reproducing fretting conditions to evaluate the tribological performance and fretting resistance of the developed WC/C coating in comparison with those of the two common coatings currently employed to prevent this type of bearing failure, i.e. thin-dense chrome and fluoropolymer coatings. The friction forces generated under fretting conditions were evaluated, and a deep surface analysis of the tribosystems was carried out through different microscopic techniques in order to identify the wear mechanisms prevailing in each coating. Results suggested that WC/C coatings could be promising candidates to mitigate fretting damage, as they combine a low friction coefficient with good wear resistance. Furthermore, WC/C coatings constitute a more sustainable solution compared to the currently employed PTFE and chrome-based coatings, paving the way to a greener society.

Abstract Image

受摩擦磨损轴承上使用的 WC/C 涂层的摩擦学研究
本研究调查了 WC/C 涂层在缺乏润滑时保护轴承孔免受摩擦磨损的能力,这是受振动影响的轴承的典型失效机制。我们进行了线性销对盘和旋转摆动块对环摩擦学试验,再现了摩擦磨损条件,以评估所开发的 WC/C 涂层的摩擦学性能和抗摩擦磨损性能,并与目前用于防止此类轴承故障的两种常见涂层(即薄致密铬涂层和含氟聚合物涂层)进行了比较。评估了在摩擦条件下产生的摩擦力,并通过不同的显微技术对摩擦系统进行了深入的表面分析,以确定每种涂层的磨损机制。结果表明,由于 WC/C 涂层兼具低摩擦系数和良好的耐磨性,因此有望成为减轻摩擦磨损的候选材料。此外,与目前使用的聚四氟乙烯和铬基涂层相比,WC/C 涂层是一种更具可持续性的解决方案,为实现绿色社会铺平了道路。
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来源期刊
Tribology Letters
Tribology Letters 工程技术-工程:化工
CiteScore
5.30
自引率
9.40%
发文量
116
审稿时长
2.5 months
期刊介绍: Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.
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