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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摘要以电解铜粉、天然鳞片石墨、树脂及SiO₂粉等为原料,采用粉末冶金方法制备树脂碳包覆石墨/铜复合材料,研究压制压力对该复合材料的组织、导电性能、力学性能以及摩擦磨损性能的影响。结果表明,随压制压力增大,复合材料中Cu相的连通性更好,石墨分布更均匀并发生严重变形成为细长条形状,SiO₂更好地被夹持于铜基体之间,复合材料的密度和力学性能增加,但电导率和摩擦性能降低。随压制压力从300 MPa提高至500 MPa,树脂碳包覆石墨/铜复合材料的电导率由12.23 MS/m降低到6.67 MS/m,抗弯强度与硬度(HV)分别由57.40 MPa和22.8提高到73.95 MPa和 35.22,10 h的体积磨损率由2.49×10^-7mm³/(m·N)增加到3.04×10^-7 mm³/(m·N)。

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	姜许
	肖鹏
	方华婵
	逯雨海
	刘滩
	刘泽彦

关键词 ：树脂碳包覆石墨/铜复合材料, 压制压力, 导电性, 力学性能, 摩擦性能

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

收稿日期: 2018-01-08 出版日期: 2019-07-12

ZTFLH:

TG146.1

基金资助:动车组前瞻技术研究项目(2016J011-G); 动车组关键技术提升研究项目(2017J008-M); 国家重点研发计划资助项目(2016YFB0301403); 中南大学中央高校基本科研业务费专项资金资助项目(2017zzts662)

通讯作者: 肖鹏,教授,博士。电话：0731-88830614;E-mail: xiaopeng@csu.edu.cn;方华婵,副教授,博士。电话：0731-88830614;E-mail: fanghc@csu.edu.cn

引用本文:

姜许, 肖鹏, 方华婵, 逯雨海, 刘滩, 刘泽彦. 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[J]. 粉末冶金材料科学与工程, 2018, 23(4): 414-421.
JIANG Xu, XIAO Peng, FANG Huachan, LU Yuhai, LIU Tan, LIU Zeyan. Effects of compacting pressure on the microstructure and properties of resin carbon-coated graphite/copper composites. Materials Science and Engineering of Powder Metallurgy, 2018, 23(4): 414-421.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2018/V23/I4/414

[1] SAMAL C P, PARIHAR J S, CHAIRA D.The effect of milling and sintering techniques on mechanical properties of Cu-graphite metal matrix composite prepared by powder metallurgy route[J]. Journal of Alloys and Compounds, 2013, 569(25): 95-101.
[2] 蒋娅琳, 朱和国. 铜基复合材料的摩擦磨损性能研究现状[J]. 材料导报, 2014, 28(3): 33-36.
JIANG Yalin, ZHU Heguo.Research status of friction and wear properties of copper matrix composites[J]. Materials Review, 2014, 28(3): 33-36.
[3] XIAO J K, ZHANG L, ZHOU K C, et al.Microscratch behavior of copper-graphite composites[J]. Tribology International, 2013, 57(57): 38-45.
[4] MA X C, HE G Q, HE D H, et al.Sliding wear behavior of copper-graphite composite material for use in maglev transportation system[J]. Wear, 2008, 265(7): 1087-1092.
[5] HUANG S, FENG Y, LIU H, et al.Electrical sliding friction and wear properties of Cu-MoS₂-graphite-WS₂ nanotubes composites in air and vacuum conditions[J]. Materials Science & Engineering A, 2013, 560(2): 685-692.
[6] HE D H, MANORY R.A novel electrical contact material with improved self-lubrication for railway current collectors[J]. Wear, 2001, 249(7): 626-636.
[7] QIAN G, FENG Y, CHEN Y M, et al.Effect of WS₂ addition on electrical sliding wear behaviors of Cu-graphite-WS₂ composites[J]. Transactions of Nonferrous Metals Society of China, 2015, 25(6): 1986-1994.
[8] ZHANG R, HE X B, CHEN Z, et al.Influence of Ti content on the microstructure and properties of graphite flake/Cu-Ti composites fabricated by vacuum hot pressing[J]. Vacuum, 2017, 141: 265-271.
[9] 许少凡, 李政, 王文芳, 等. 镀铜石墨粉含量对铜-镀铜石墨复合材料组织与性能的影响[J]. 热加工工艺, 2003, 23(1): 18-19.
XU Shaofan, LI Zheng, WANG Wenfang, et al.Effects of copper-coated graphite content on the structure and properties of the Cu/copper-coated graphite composite[J]. Hot Working Technology, 2003, 23(1): 18-19.
[10] 冉旭, 黄显峰, 段利利, 等. 铜-石墨复合材料的摩擦学性能和磨损机理[J]. 材料导报, 2012, 26(8): 33-38.
RAN Xu, HUANG Xianfeng, DUAN Lili, et al.Tribological properties and wear mechanism of copper-graphite composite[J]. Materials Review, 2012, 26(8): 33-38.
[11] JIANG X, FANG H C, XIAO P, et al.Influence of carbon coating with phenolic resin in natural graphite on the microstructures and properties of graphite/copper composites[J]. Journal of Alloys and Compounds, 2018, 744(5): 165-173.
[12] 姚萍屏, 盛洪超, 熊翔, 等. 压制压力对铜基粉末冶金刹车材料组织和性能的影响[J]. 粉末冶金材料科学与工程, 2006, 11(4): 239-243.
YAO Pingping, SHENG Hongchao, XIONG Xiang, et al.Effect of compaction pressure on microstructures and properties of Cu-based P/M brake materials[J]. Materials Science and Engineering of Powder Metallurgy, 2006, 11(4): 239-243.
[13] 高卫强, 夏立超, 王成国, 等. 颗粒级配对乙烯基酯树脂/石墨复合材料性能的影响[J]. 高分子材料科学与工程, 2016, 32(11): 33-36.
GAO Weiqiang, XIA Lichao, WANG Chengguo, et al.Effect of particle size gradation on the performance of vinyl ester resin/graphite composites[J]. Polymer Materials Science & Engineering, 2016, 32(11): 33-36.
[14] 周文艳, 冉丽萍, 彭可, 等. Mo₂C改性C/C-Cu复合材料的组织及载流摩擦磨损性能[J]. 复合材料学报, 2016, 33(9): 2074-2081.
ZHOU Wenyan, RAN Liping, PENG Ke, et al.Structure and tribological property with electric current of Mo₂C modified C/C-Cu composites[J]. Acta Materiae Compositae Sinica, 2016, 33(9): 2074-2081.
[15] 李世鹏, 熊翔, 姚萍屏, 等. 石墨、SiO₂在铜基摩擦材料基体中的摩擦学行为研究[J]. 非金属矿, 2003, 26(6): 51-53.
LI Shipeng, XIONG Xiang, YAO Pingping, et al.Study on friction and wear behaviors of graphite and SiO₂ in matrix of Cu-based friction material[J]. Non-Metallic Mines, 2003, 26(6): 51-53.
[16] 周文艳, 彭可, 冉丽萍, 等. 电流对Mo₂C改性C/C-Cu复合材料载流摩擦磨损性能的影响[J]. 摩擦学学报, 2016, 36(4): 503-509.
ZHOU Wenyan, PENG Ke, RAN Liping, et al.Effect of electrical current on tribological property of the Mo₂C modified C/C-Cu composite[J]. Tribology, 2016, 36(4): 503-509.