Study on the Friction and Wear Performance of Lightly Loaded Reciprocating Carbon/Aramid-Based Composites

Yangyang Zhao,Guoyuan Zhang,Maotan Liang,Qunfeng Zeng,Tomasz Trzepieciński

doi:10.1155/2021/9924690

Yangyang Zhao, Guoyuan Zhang + Show 3 more

Open Access

https://doi.org/10.1155/2021/9924690

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Abstract

The preparation methods of T300 carbon cloth- and aramid cloth-reinforced epoxy resin and cyanate ester were proposed, and four kinds of composite samples were obtained. The friction coefficient and wear rate under different test times and loads were obtained using a reciprocating pin-disk tribology tester. The tribology pairs included pins or sliding blocks made from different metals (45 steel and brass) and the disk samples of the composites. The test results showed that the friction coefficients of the T300 carbon cloth- (T300/4211 and T300/BS-4) and aramid cloth- (aramid/4211 and aramid/BS-4) reinforced epoxy resin or cyanate ester changed from 0.09 to 0.3 and were low under dry friction conditions. Under 75 N, aramid/BS-4 coupled with 45 steel pins was the lowest friction coefficient, which was 0.09. In particular, the friction coefficient and wear rate of the composite-reinforced cyanate ester were the lowest, which meant that this composite may be more suitable for use under lightly loaded and reciprocating running conditions in space engineering. By comparing the surface morphologies of composites before and after the test, the wear mechanism of the composites was discussed and the lower friction coefficient and wear rate may originate from the abrasive wear effects occurring between the tribology pairs. The research results have important engineering significance for guiding the use of composites in the deployable mechanisms used in space engineering.

Highlights

To improve the effective bearing capacity and reduce the occupied space in the spacecraft, the oncoming large-diameter deployment mechanism needs to be folded into a closed state and expands when it works in space
As shown in the above test results, when the pairs are made by 45 steel pins, brass pins, and brass sliding blocks, the composites with the lowest friction coefficients are aramid/BS-4, T300/BS-4, and aramid/4211, respectively
Metallographic microscopic imaging (GX41) is performed to observe the worn surfaces of the composites after finishing all the tests to determine the wear mechanism. e microscopic morphologies of the composites paired with different metals are shown in Figures 9–11. us, the wear mechanism of the composites is discussed by analyzing the surface morphologies

Summary

Introduction

To improve the effective bearing capacity and reduce the occupied space in the spacecraft, the oncoming large-diameter deployment mechanism needs to be folded into a closed state and expands when it works in space. In practical space engineering, to simultaneously meet large volume, lightweight, and high flexibility deployment mechanism requirements, advanced materials have been studied, different composites have been introduced [1], and increasing numbers of composites have been gradually adopted [2, 3]. Due to their advantages of lightweight, high specific strength, high specific modulus, better design, and resistance, carbon/aramid-based composites have been developed and applied to space engineering [4]. Yin et al [7] found that different carbon fiber reinforcements had an effect on the friction and wear properties of resin-based friction materials and that the resin-based friction material

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