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Dry sliding tribological properties of A356-SiCP aluminum matrix composites prepared by vacuum stir casting

Jiaqi Pan (School of Materials Science and Engineering, Tongji University, Shanghai, China and Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Shanghai, China)
Xiaoshan Liu (School of Materials Science and Engineering, Tongji University, Shanghai, China and Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Shanghai, China)
Guoqiu He (School of Materials Science and Engineering, Tongji University, Shanghai, China and Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Shanghai, China)
Bin Ge (School of Materials Science and Engineering, Tongji University, Shanghai, China and Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Shanghai, China)
Peiwen Le (School of Materials Science and Engineering, Tongji University, Shanghai, China and Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Shanghai, China)
Jingquan Li (School of Materials Science and Engineering, Tongji University, Shanghai, China and Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Shanghai, China)
Zhiqiang Zhou (School of Materials Science and Engineering, Tongji University, Shanghai, China and Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, Shanghai, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 28 May 2021

Issue publication date: 3 August 2021

264

Abstract

Purpose

The purpose of this paper is to understand the effect of particle content, applied load and sliding speed on the tribological properties of A356-SiCP composites manufactured using a newly developed vacuum stir casting technique.

Design/methodology/approach

A356 alloy reinforced with 10, 15 and 20 vol% SiC particles was prepared by vacuum stir casting. Tribological tests were carried out on block-on-ring tribometer under dry sliding conditions, room temperature. Wear mechanism was investigated by scanning electron microscope and energy dispersion spectrum.

Findings

SiCP is homogeneously dispersed in the matrix. The increase in SiCP content decrease wear rate, but it leads to an increase in coefficient of friction. The wear rate increase and friction coefficient present different variation trends with increasing load. For A356-20%SiCP composite, when the load is less than 10 MPa, wear rate and friction coefficient under sliding speed of 400 rpm are lower than those of 200 rpm. Wear mechanism transition from abrasion, oxidation, delamination, adhesion to plastic flow as load and sliding speed increasing.

Practical implications

Results of this study will help guide the use of A356-SiCP in many automotive products such as brake rotors, brake pads, brake drums and pistons.

Originality/value

There are few paper studies the effect of particle content, applied load and sliding speed on the tribological properties of A356-SiCP composites. Aluminum matrix composites with uniform distribution of reinforcing particles were successfully prepared by using the newly developed vacuum stir casting technique.

Keywords

Acknowledgements

This research was financially supported by the Open Research Fund from the State Key Laboratory of Rolling and Automation, Northeastern University, Grant No.: 2016008.

Citation

Pan, J., Liu, X., He, G., Ge, B., Le, P., Li, J. and Zhou, Z. (2021), "Dry sliding tribological properties of A356-SiCP aluminum matrix composites prepared by vacuum stir casting", Industrial Lubrication and Tribology, Vol. 73 No. 5, pp. 685-691. https://doi.org/10.1108/ILT-08-2020-0304

Publisher

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Emerald Publishing Limited

Copyright © 2021, Emerald Publishing Limited

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