Microstructure and properties of pressure-sintered resin carbon-coated graphite/copper composites

被引：0
|
作者：
Liu T. [1 ]
Fang H.-C. [1 ]
Li J.-W. [1 ]
Zhu J.-M. [1 ]
Xiao P. [1 ]
机构：
[1] National Key Laboratory of Science and Technology for National Defence on High-strength Structural Materials, Central South University, Changsha
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2019年 / 29卷 / 07期
关键词：
Electrical conductivity; Friction property; Mechanical property; Pressure sintered; Resin coated graphite/copper composite;
D O I：
10.19476/j.ysxb.1004.0609.2019.07.13
中图分类号：
学科分类号：
摘要：
Using electrolytic copper powder, resin-coated graphite powder and silicon dioxide powder as raw materials, resin-carbon coated graphite/copper composites were prepared by using traditional powder metallurgical mixing, cold pressure and normal sintered or pressure sintered techniques, respectively. And then, the microstructure, electrical conductivity, mechanical property, friction and wear performance of these composites were compared with the grounded brushes prepared by two sintering processes for high-speed trains, France Roland MCXXP brand brushes. The results show that, compared with normal sintered resin carbon-coated graphite/copper composites, the pressure sintered resin-carbon coated graphite/copper composites have better connectivity copper matrix, more uniform dispersion of graphite, and more silica phases are better embedded in the copper matrix. The density, flexural strength, hardness, electrical conductivity and friction and wear properties are significantly improved, which are similar to those of the French Roland MCXXP brand brushes. © 2019, Science Press. All right reserved.
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页码：1446 / 1456
页数：10
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