Effects of graphite content on microstructure and properties of Cu-graphite-emulsified asphalt composites

被引：0
|
作者：
Zhou X. [1 ]
Li J. [1 ]
Xiong A. [1 ]
Cao H. [2 ]
Wang L. [3 ]
机构：
[1] Department of Materials Science and Engineering, Kunming University of Science and Technology, Kunming
[2] Shanghai Xinchi Energy Technology CO. LTD., Shanghai
[3] Guilin Key Laboratory of Microelectronic Electrode Materials and Biological Nanomaterials, China Nonferrous Metal (Guilin) Geology and Mining CO. LTD., Guilin
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 11期
关键词：
Cu-graphite composites; Emulsified asphalt; Friction and wear properties; Microstructure; Powder metallurgy;
D O I：
10.13801/j.cnki.fhclxb.20210121.001
中图分类号：
学科分类号：
摘要：
Using electrolytic copper powder and graphite powder as raw materials, anionic emulsified asphalt as binder, the Cu-graphite-emulsified asphalt composites were prepared by powder metallurgy technology, and XRD, EDS and SEM were used to characterize the microstructure of Cu-graphite-emulsified asphalt composites with graphite content of 2wt%-8wt%. The friction and wear properties, mechanical and electrical properties of Cu-graphite-emulsified asphalt composites were studied, and compared with those of Cu-graphite composites without emulsified asphalt. The results show that emulsified asphalt can effectively prevent the aggregation of graphite particles and has a bonding effect on the graphite and Cu matrix; At the interface of the two phases, there is almost no gap and layered graphite being produced; The sample with 4wt% graphite has minimum wear loss of only 0.0049 g, and the friction coefficient is about 0.025; Increasing the load and graphite content will increase the wear loss, but it can reduce the friction coefficients; During sliding friction, cracks, chutes, depressions, small particles and lamellar structures will appear on the worn surface, but the extent is lower than that of composites without emulsified asphalt. © 2021, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
引用
收藏
页码：3775 / 3784
页数：9
相关论文
共 43 条
  • [1] KUBOTA Y, NAGASAKA S, MIYAUCHI T, Et al., Sliding wear behavior of copper alloy impregnated C/C composites under an electrical current, Wear, 302, 2, pp. 1492-1498, (2013)
  • [2] DING T, CHEN G X, BU J, Et al., Effect of temperature and arc discharge on friction and wear behaviors of carbon strip/copper contact wire in pantograph-catenary systems, Wear, 271, 9, pp. 1629-1636, (2011)
  • [3] SHANGGUAN B, ZHANG Y, XING J, Et al., Comparative study on wear behaviors of metal-impregnated carbon material and C/C composite under electrical sliding, Tribology Transactions, 53, 6, pp. 933-938, (2010)
  • [4] HE D H, MANORY R R, GRADY N., Wear of railway contact wires against current collector materials, Wear, 215, 1, pp. 146-155, (1998)
  • [5] WANG Y A, LI J X, YAN Y, Et al., Effect of electrical current on tribological behavior of copper-impregnated metallized carbon against a Cu-Cr-Zr alloy, Tribology International, 50, pp. 26-34, (2012)
  • [6] YIN J, ZHANG H, TAN C, Et al., Effect of heat treatment temperature on sliding wear behavior of C/C-Cu composites under electric current, Wear, 312, 1, pp. 91-95, (2014)
  • [7] ZHAO H, LIU L, WU Y, Et al., Investigation on wear and corrosion behavior of Cu-graphite composites prepared by electroforming, Composites Science and Technology, 67, 6, pp. 1210-1217, (2007)
  • [8] NAGASAWA H, KATO K., Wear mechanism of copper alloy wire sliding against iron-base strip under electric current, Wear, 216, 2, pp. 179-183, (1998)
  • [9] RAVINDRAN P, MANISEKAR K, NARAYANASAMY P, Et al., Application of factorial techniques to study the wear of Al hybrid composites with graphite addition, Materials & Design, 39, 8, pp. 42-54, (2012)
  • [10] CANAKCI, AYKUT, VAROL, Et al., Prediction of the influence of processing parameters on synthesis of Al2024-B<sub>4</sub>C composite powders in a planetary mill using an artificial neural network, Science and Engineering of Composite Materials, 21, 3, pp. 411-420, (2014)
12345