The effect of reinforcing fillers on the tribological performance of PTFE composites for a sustainable environment

IF 5.3 1区工程技术 Q1 ENGINEERING, MECHANICAL Wear Pub Date : 2024-07-30 DOI:10.1016/j.wear.2024.205524

Ajinkya Raut , Emerson Escobar Nunez , Ronald Sellers , Md Saifur Rahman , Andreas A. Polycarpou

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Abstract

Friction and wear, specifically in automotive components, significantly impact fuel consumption, greenhouse gas emissions, material quality and lifespan, operational costs, and depleting the planet's finite resources. High-performance polymers (HPPs) like Polytetrafluoroethylene (PTFE) are used for their low friction, high wear and chemical resistance, high-temperature stability, and self-lubrication. This study investigates the effects of various reinforcing fillers on PTFE's tribological performance under a 32 N load and 0.5 m/s sliding speed for 1 h in unlubricated conditions, representing automotive air-conditioning compressors. PTFE reinforced with aromatic thermosetting copolyester (ATSP) demonstrated superior wear resistance and lower friction compared to carbon black, bronze, and graphite fillers. The enhanced performance of PTFE-ATSP blends is due to their higher mechanical strength and ability to form fluoride-rich lubricating transfer films on the 440C stainless steel counter surface. PTFE-ATSP blends offer an effective solution for unlubricated engineering applications aimed at sustainable environments.

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增强填料对用于可持续环境的聚四氟乙烯复合材料摩擦学性能的影响

摩擦和磨损，尤其是汽车零部件的摩擦和磨损，对燃料消耗、温室气体排放、材料质量和使用寿命、运营成本以及地球有限资源的消耗都有重大影响。聚四氟乙烯（PTFE）等高性能聚合物（HPPs）具有低摩擦、高耐磨性和耐化学性、高温稳定性和自润滑性等特点。本研究以汽车空调压缩机为例，探讨了各种增强填料对聚四氟乙烯摩擦学性能的影响，即在无润滑条件下，在 32 N 负荷和 0.5 m/s 的滑动速度下工作 1 小时。与炭黑、青铜和石墨填料相比，用芳香族热固性共聚聚酯（ATSP）增强的聚四氟乙烯表现出更优异的耐磨性和更低的摩擦系数。PTFE-ATSP 混合物的性能之所以得到增强，是因为它们具有更高的机械强度，并能在 440C 不锈钢台面上形成富含氟的润滑转移膜。PTFE-ATSP 混合物为可持续环境下的无润滑工程应用提供了有效的解决方案。

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来源期刊

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.