压制压力对树脂碳包覆石墨/铜复合材料显微组织与性能的影响

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Abstract Resin carbon-coated graphite/copper composites were fabricated by power metallurgy method using electrolytic copper powder, natural flake-graphite, resin, silica, et al as raw materials. The effects of compacting pressure on microstructures, electrical conductivity, mechanical and tribological properties of resin carbon-coated graphite/copper composites were investigated. The results indicate that, with increasing the compacting pressure, the connectivity of Cu phase in the composite is better, the distribution of graphite is more uniform, the shape of the graphite is seriously deformed to slender strip, and silicon dioxide is better sandwiched between the copper matrix. Meanwhile, the density and mechanical properties of the composites increase but the conductivity and tribological properties decrease. With increasing the compacting pressure, the electrical conductivity of resin carbon-coated graphite/copper composites decrease from 12.23 MS/m to 6.67 MS/m, the bend strength and hardness (HV) increase from 57.40 MPa to 73.95 MPa and 22.8 to 35.22, respectively. The volume wear rate of resin carbon-coated graphite/copper composites for 10 h increase from 2.49×10^-7 m³/(m·N) to 3.04×10^-7 m³/(m·N).

Key words： resin carbon-coated graphite/copper composites compacting pressure electrical conductivity mechanical properties tribological properties

Received: 08 January 2018 Published: 12 July 2019

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TG146.1

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	Articles by authors
	JIANG Xu
	XIAO Peng
	FANG Huachan
	LU Yuhai
	LIU Tan
	LIU Zeyan

Cite this article:

JIANG Xu,XIAO Peng,FANG Huachan, et al. Effects of compacting pressure on the microstructure and properties of resin carbon-coated graphite/copper composites[J]. Materials Science and Engineering of Powder Metallurgy, 2018, 23(4): 414-421.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2018/V23/I4/414

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