Combining nano diamond-like carbon coatings with fillers for enhanced wear resistance of PTFE: Nodal support-lubrication mechanism

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology Pub Date : 2025-02-01 DOI:10.1016/j.surfcoat.2025.131807

Zhihao Chen , Jian Wu , Shixue He , Yefei Zhou , Shouyao Liu , Benlong Su , Youshan Wang

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引用次数: 0

Abstract

Enhancing the wear resistance of polytetrafluoroethylene (PTFE) sealing elements in aerospace hydraulic systems is essential for the development of high-speed and high-pressure, and a singular modification is inadequate for fulfilling. In order to address this requirement, we investigated a synergistic modification through nano diamond-like coatings (DLC) combined with fillers. We evaluated the effect of the fillers on the structure of the DLC coatings and investigated the wear resistance mechanism. The results show that the synergistic modification further enhances the wear resistance of PTFE composites compared to the filler modification, which is attributed to the altered wear mechanism. The structural and compositional differences between the filler and the DLC coatings affect the coating deposition. Carbon fiber (CF) and DLC coating with similar structural characteristics can form surface nodal structures with interfacial load support and self-lubricating properties. The support-lubrication nodal structures are effective in avoiding the deterioration of tribological performance due to the difference properties of the coating-substrate. Moreover, the number of support-lubrication nodal structures affects the wear resistance effect. In conclusion, this study provides a new idea to enhance the wear resistance of PTFE composites through the synergistic modification of nano DLC coatings and fillers.

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来源期刊

Surface & Coatings Technology 工程技术-材料科学：膜

CiteScore

10.00

自引率

11.10%

发文量

921

审稿时长

19 days

期刊介绍： Surface and Coatings Technology is an international archival journal publishing scientific papers on significant developments in surface and interface engineering to modify and improve the surface properties of materials for protection in demanding contact conditions or aggressive environments, or for enhanced functional performance. Contributions range from original scientific articles concerned with fundamental and applied aspects of research or direct applications of metallic, inorganic, organic and composite coatings, to invited reviews of current technology in specific areas. Papers submitted to this journal are expected to be in line with the following aspects in processes, and properties/performance: A. Processes: Physical and chemical vapour deposition techniques, thermal and plasma spraying, surface modification by directed energy techniques such as ion, electron and laser beams, thermo-chemical treatment, wet chemical and electrochemical processes such as plating, sol-gel coating, anodization, plasma electrolytic oxidation, etc., but excluding painting. B. Properties/performance: friction performance, wear resistance (e.g., abrasion, erosion, fretting, etc), corrosion and oxidation resistance, thermal protection, diffusion resistance, hydrophilicity/hydrophobicity, and properties relevant to smart materials behaviour and enhanced multifunctional performance for environmental, energy and medical applications, but excluding device aspects.