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

ZHOU Xiaolong; LI Jintao; XIONG Aihu; CAO Hanxing; WANG Lihui

doi:10.13801/j.cnki.fhclxb.20210121.001

Volume 38 Issue 11

Nov. 2021

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ZHOU Xiaolong, LI Jintao, XIONG Aihu, et al. Effects of graphite content on microstructure and properties of Cu-graphite-emulsified asphalt composites[J]. Acta Materiae Compositae Sinica, 2021, 38(11): 3775-3784. doi: 10.13801/j.cnki.fhclxb.20210121.001

Citation:

ZHOU Xiaolong, LI Jintao, XIONG Aihu, et al. Effects of graphite content on microstructure and properties of Cu-graphite-emulsified asphalt composites[J]. Acta Materiae Compositae Sinica, 2021, 38(11): 3775-3784. doi: 10.13801/j.cnki.fhclxb.20210121.001

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

doi: 10.13801/j.cnki.fhclxb.20210121.001

ZHOU Xiaolong^{1
,
,},
LI Jintao^1
,,
XIONG Aihu^1
,,
CAO Hanxing^2
,,
WANG Lihui^3
,

1.
Department of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
2.
Shanghai Xinchi Energy Technology CO. LTD., Shanghai 201800, China
3.
Guilin Key Laboratory of Microelectronic Electrode Materials and Biological Nanomaterials, China Nonferrous Metal (Guilin) Geology and Mining CO. LTD., Guilin 541004, China

Received Date: 2020-12-03
Accepted Date: 2021-01-11

Available Online: 2021-01-22

Publish Date: 2021-11-01

Abstract

Abstract

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.
- emulsified asphalt,
- Cu-graphite composites,
- powder metallurgy,
- friction and wear properties,
- microstructure
Long Abstrsct
Innovation Points

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References(43)

References

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