Abstract
The friction behavior of copper–iron matrix composite containing oriented graphite flakes has been measured in three sliding modes corresponding to the graphite flakes, namely one random direction on the in-plane surface and the other two directions of parallel and vertical to the layered texture on the cross-sectional surface. At the in-plane surface, with the normal load increasing, the friction coefficient turned from the lowest to the highest because of aggravated plastic contact. At the cross-sectional surface, the friction coefficient showed a decline owing to high hardness in this face and that in the parallel direction was obviously higher than that in the vertical direction, especially at the low normal load, due to sustained adhesion caused by metal ridges and high energy dissipation originated from graphite fracture. The wear rate at the in-plane surface proved higher, which can be attributed to small hardness and low shear strength, while little differences of the wear rates were exhibited between the two directions of the cross-sectional surface.
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Acknowledgements
This work was supported by the National Key R&D Program of China (Grant Nos. 2017YFB0310300, and 2017YFB0903803), the National Natural Science Foundation of China (Grant No. 51672209), Shaanxi Innovation Capacity Support Program (2018TD-031), and the Natural Science Basic Research Plan in Shaanxi Province of China (Grant No. 2016JQ5046). Great thanks for these supports.
Funding
This research was funded by the National Key R&D Program of China (Grant Nos. 2017YFB0310300, and 2017YFB0903803), the National Natural Science Foundation of China (Grant Nos. 51672209, and 51872223), Shaanxi Innovation Capacity Support Program (2018TD-031), and the Natural Science Basic Research Plan in Shaanxi Province of China (Grant No. 2016JQ5046).
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Conceptualization, formal analysis, investigation, and writing—original draft: BH; Investigation: HG and NZ; Data curation: QZ; Project administration: BW; Supervision and writing—review and editing: JY.
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Hou, B., Guo, H., Zhang, N. et al. Anisotropic Friction Derived from the Layered Arrangement of the Oriented Graphite Flakes in the Copper–Iron Matrix Composite. Tribol Lett 70, 78 (2022). https://doi.org/10.1007/s11249-022-01614-2
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DOI: https://doi.org/10.1007/s11249-022-01614-2