1. Microstructure, mechanical and tribological properties of Cu-Sn/Cr3C2/Gr composites.
- Author
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Liang, Yaqian, Jiang, Long, Zhang, Xiukuang, Pei, Zhenxiang, and Lei, Qian
- Subjects
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FRETTING corrosion , *MICROSTRUCTURE , *MECHANICAL wear , *WEAR resistance , *MATERIAL plasticity , *ADHESIVE wear , *COPPER-tin alloys - Abstract
Cr 3 C 2 and graphite (Gr) reinforced Cu-Sn matrix composites were fabricated by powder metallurgy. The effects of Cr 3 C 2 content (5, 10, 15, 20 wt%) on the microstructure, mechanical properties and tribological properties of studied composites were investigated. The results showed that Cr 3 C 2 particles were well bonded to the copper matrix. The as-sintered Cu-Sn/20Cr 3 C 2 /5Gr composite achieved a microhardness of 120 HV, an ultimate compressive strength of 330 MPa, and a yield strength of 206.49 MPa. Cr 3 C 2 particles improved the high-temperature stability of the composite with a softening temperature of 800 ℃. In addition, Cr 3 C 2 particles had an inhibitory effect on plastic deformation and adhesive contact during wear, improving the wear resistance of composites. The average friction coefficient and wear rate of Cu-Sn/20Cr 3 C 2 /5Gr were 0.32 and 2.48 × 10-5 mm3·N−1·m−1, respectively. It was worth noting that the dominant wear mechanisms of the studied composites changed with increased Cr 3 C 2 content, from adhesive wear to abrasive wear. This work was beneficial for developing copper matrix composites with high-temperature stability and enhanced wear resistance. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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