Mechanical and tribological properties of ATP-modified GF/UHMWPE water-lubricated bearing composites

IF 5.3 1区工程技术 Q1 ENGINEERING, MECHANICAL Wear Pub Date : 2025-02-06 DOI:10.1016/j.wear.2025.205851

Guorui Wei , Xiuli Zhang , Jian Cui , Tao Huang , Gengyuan Gao , Jun Cao , Yuanliang Zhao

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Abstract

Filling ultra-high molecular weight polyethylene (UHMWPE) with glass fiber (GF) alone can significantly enhance its wear resistance but does not effectively reduce the friction coefficient. To improve the tribological properties of GF/UHMWPE composite, modified attapulgite (mATP), treated with γ-methacryloxypropyl trimethoxysilane (KH570), was used as the filler. The influence of mATP mass fraction on composite properties was investigated, and the performance of the mATP/modified-GF (mGF)/UHMWPE composites was further examined. The composites were characterized for their melting and crystallization behavior, thermal expansion, surface wettability, hardness, and mechanical properties. Their tribological performance was evaluated through pin-on-disk tests under both dry friction and water lubrication conditions, as well as disk-on-disk water lubrication tests, with 304 stainless steel as the material for the sliding counterface. The worn surface morphology and wear mechanisms of the composites were analyzed. The results indicate that KH570 effectively modifies ATP and GF. Compared to GF/UHMWPE composites, mATP/GF/UHMWPE composites exhibit enhanced mechanical properties. An optimal ATP content decreases the friction coefficient under both dry friction and water-lubrication conditions, enhancing wear resistance. Composites with 4 wt% mATP show optimal performance. Further modification of GF enhances the overall performance of the composite material.

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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.