典型文献
Effect of Sintering Temperature and Hydrophobic Treatment on the Microstructure and Properties of Copper-Graphite Composites
文献摘要：
Copper-graphite composites were prepared by spark plasma sintering (SPS) using copper-coated graphite powder. Hydrophobic surfaces were successfully constructed by chemical etching and surface treatment. The density, metallographic structure, microstructure, Shore hardness, resistivity, water contact angle, and friction/wear properties of the composites were investigated using the Archimedes drainage method, a metallographic microscope, a scanning electron microscope, a hardness tester, a resistometer, a surface science tester, and a friction tester. The results showed that the relative density and Shore hardness of the copper–graphite composites increased slightly from 90.04％ and 56 HSD to 92.66％ and 59 HSD, respectively, when the sintering temperature increased from 700 to 900 ℃. The copper and graphite phases in the copper-graphite composites were uniformly distributed with a continuous and network-like structure at various sintering temperatures. The interface between the copper and graphite was in good condition, without any obvious cracks or voids. The optimum process for hydrophobic surface construction included etching with a 1 mol/L K2Cr2O7-H2SO4 solution for 1 min, and soaking in a 0.09 mol/L cetylbenzene sulfonic acid alcohol solution for 1 h. The contact angle of the copper–graphite composite reached 130°. Hydrophobic treatment was beneficial for reducing the friction coefficient (from 0.18-0.19 to 0.13-0.15) and the wear rate (from 4.1-6.2×10-3 to 1.1-2.1×10-3 mm3/(N·m)), demonstrating obvious antifriction and wear-resisting properties. The resistivities of the hydrophobic-treated samples increased slightly, from (4-8)×10-7 Ω·m to (5-15)×10-7 Ω·m, meeting the resistivity requirements of copper-graphite composite pantograph sliders and current receiver sliders in actual working conditions.
文献关键词：
中图分类号：
作者姓名：
ZOU Jianpeng;WEI Hongming;XIAO Cong
作者机构：
State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;State Key Laboratory for System In-tegration of High Power AC Drive Electric Locomotive,Zhuzhou 412001,China
文献出处：
引用格式：
[1]ZOU Jianpeng;WEI Hongming;XIAO Cong-.Effect of Sintering Temperature and Hydrophobic Treatment on the Microstructure and Properties of Copper-Graphite Composites)[J].武汉理工大学学报（材料科学版）（英文版）,2022(03):305-313
A类：
resistometer,cetylbenzene,resistivities,pantograph,sliders
B类：
Effect,Sintering,Temperature,Hydrophobic,Treatment,Microstructure,Properties,Copper,Graphite,Composites,graphite,composites,were,prepared,by,spark,plasma,sintering,SPS,using,copper,coated,powder,surfaces,successfully,constructed,chemical,etching,treatment,density,metallographic,microstructure,Shore,hardness,resistivity,water,contact,angle,wear,properties,investigated,Archimedes,drainage,method,microscope,scanning,electron,tester,science,results,showed,that,relative,increased,slightly,from,HSD,respectively,when,phases,uniformly,distributed,continuous,network,like,various,temperatures,interface,between,was,good,without,any,obvious,cracks,voids,optimum,process,hydrophobic,construction,included,K2Cr2O7,H2SO4,solution,soaking,sulfonic,acid,alcohol,reached,beneficial,reducing,coefficient,rate,mm3,demonstrating,antifriction,resisting,treated,samples,meeting,requirements,current,receiver,actual,working,conditions
AB值：
0.499513
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