Effects of different temperatures and loads on the tribological behavior of foamed iron-reinforced SiCp/A359 composites
Industrial Lubrication and Tribology
ISSN: 0036-8792
Article publication date: 13 September 2022
Issue publication date: 25 October 2022
Abstract
Purpose
To improve the high-temperature wear properties of the SiCp/A359 composite, foamed iron-reinforced SiCp/A359 composite (A359–SiCp/Fe) is prepared. The purpose of this study is to investigate the tribological behavior and mechanism of the A359–SiCp/Fe composites at different temperatures (100–500 °C) and loads (7 N, 10 N and 12 N).
Design/methodology/approach
The A359–SiCp/Fe composite was fabricated by vacuum-assisted infiltration. The dry sliding tribological behaviors of A359–SiCp/Fe composite were investigated using the ball-on-disc-type tribometer. The worn surface and wear morphology of the longitudinal section were examined using field emission scanning electron microscopy and metallographic microscope.
Findings
The critical transition temperature for severe wear in A359–SiCp/Fe composite was 50–100 °C higher than in SiCp/A359 composite. Foamed iron prevents exfoliation cracks from penetrating deeper into the matrix. The friction coefficient stability of the A359–SiCp/Fe composite was higher than the unreinforced composite at elevated temperatures. With the increase in temperature, the friction-affected layer was severely worn, and the wear mechanism transferred from abrasion and delamination to oxidation and plastic flow, respectively.
Originality/value
The preparation procedure for aluminum matrix composites reinforced with foamed metal has been less reported, and the research on the tribological behavior and mechanism of A359–SiCp/Fe composite at various temperatures is insufficient. The foamed iron structure considerably enhances the wear properties of SiCp/A359 composite in elevated temperature conditions.
Keywords
Acknowledgements
The authors acknowledge the financial support from the 2020 open projects (No: KLATM202005) of Key Laboratory of Advanced Technologies of Materials, Ministry of Education China, Southwest Jiaotong University.
Citation
Liu, Y., He, G., Liu, X., Pan, J., Zhou, Z., Liao, Y., He, Q. and Xu, X. (2022), "Effects of different temperatures and loads on the tribological behavior of foamed iron-reinforced SiCp/A359 composites", Industrial Lubrication and Tribology, Vol. 74 No. 10, pp. 1155-1164. https://doi.org/10.1108/ILT-04-2022-0122
Publisher
:Emerald Publishing Limited
Copyright © 2022, Emerald Publishing Limited