1. Effect of Ti3SiC2 replacing graphite on the microstructure and properties of Cu-Sn matrix composites.
- Author
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Zhang, Xiukuang, Liang, Yaqian, Lei, Qian, Xiao, Shishui, and Jiang, Yanbin
- Subjects
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MECHANICAL alloying , *GRAPHITE , *MICROSTRUCTURE , *POWDER metallurgy , *COPPER-tin alloys , *WEAR resistance - Abstract
A new type of intelligent lubrication functional material, Cu-5Sn/22vol%Cr 3 C 2 /16vol%Ti 3 SiC 2 composite, was fabricated by powder metallurgy. The mechanical and tribological properties of Cu-Sn/Cr 3 C 2 /Ti 3 SiC 2 composite were studied. Ti 3 SiC 2 , as a lubricating component, had a better reinforcing effect than graphite. Compared with Cu-Sn/Cr 3 C 2 /Gr composite, Cu-Sn/Cr 3 C 2 /Ti 3 SiC 2 composite exhibited a 97% increase in hardness and 144% increase in compressive strength, reaching 223 HV and 821 MPa, respectively. Moreover, Cu-Sn/Cr 3 C 2 /Ti 3 SiC 2 composite's wear rate was lower than those of Cu-Sn/Cr 3 C 2 /Gr composite under different loads. The enhancement was ascribed to the Ti 3 SiC 2 particles, which had a well-bonded interface with the matrix and induced a higher Orowan strengthening effect. The studied composites with enhanced mechanical and tribological properties have promising potential for application in bearings and mechanical transmission devices. • Cu-Sn/Cr 3 C 2 /Ti 3 SiC 2 composite was fabricated by mechanical alloying and vacuum hot-pressing sintering. • The mechanical and tribological properties of composites were improved by replacing graphite with Ti 3 SiC 2. • The formed mechanically mixed layers enhanced the wear resistance of Cu-Sn/Cr 3 C 2 /Ti 3 SiC 2 composites. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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