烧结温度对碳聚合物点/铜复合材料显微组织与性能的影响

doi:10.19976/j.cnki.43-1448/TF.2021066

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Abstract Carbon polymer dot/copper composites were prepared by powder metallurgyusing carbon polymer dot (CPD) as copper reinforcement. The density, hardness, tensile properties and wear resistance of CPD/Cu composites at different sintering temperatures (350-750 ℃) were analyzed and measured. The results show that CPD is uniformly dispersed in the copper matrix, and the amorphous carbon in the CPD shell network is conducive to the formation of a good interface bond between the CPD and the copper matrix. The relative density of the CPD/Cu matrix composites is more than 95%, indicating that the compactness of the composites is high and the porosity is small. The mechanical properties and friction and wear properties of CPD/Cu composites are significantly higher than those of pure Cu materials. With the increase of sintering temperature, the density, hardness and tensile strength of the CPD/Cu composites show the rules of increase and then decrease. The hardness is higher than Cu matrix by 49.4 HV, the composite sintered at 550 ℃ obtains the best comprehensive properties, the tensile strength (334.0 MPa) is about 25.6% higher than that of pure Cu, and the volume wear rate is 17.67×10^-12m³/m.

Key words： powder metallurgy carbonized polymer dot copper matrix composites mechanical properties friction properties

Received: 29 July 2021 Published: 22 December 2021

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	YANG Yajie
	LI Zhaojie
	ZHAO Wenmin
	BAO Rui
	YI Jianhong

Cite this article:

YANG Yajie,LI Zhaojie,ZHAO Wenmin, et al. Effects of sintering temperature on microstructure and properties of carbon polymer dot/copper composites[J]. Materials Science and Engineering of Powder Metallurgy, 2021, 26(6): 537-546.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2021066 OR http://pmbjb.csu.edu.cn/EN/Y2021/V26/I6/537

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