Influence of carbon coating with phenolic resin in natural graphite on the microstructures and properties of graphite/copper composites

Carbon-coated graphite/copper composites were fabricated by using electrolytic copper powder and phenolic resin-coated graphite as raw materials via powder metallurgy method. The effect of natural graphite with phenolic resin coating on the microstructures and properties of graphite/copper composite...

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Bibliographic Details
Published in:Journal of alloys and compounds 2018-05, Vol.744, p.165-173
Main Authors: Jiang, X., Fang, H.C., Xiao, P., Liu, T., Zhu, J.M., Wang, Y.C., Liu, P.F., Li, Y.
Format: Article
Language:English
Subjects:
Carbon coating
Carbonization
Coating effects
Continuous coating
Copper
Electrical resistivity
Graphite
Mechanical properties
Metal matrix composites
Metallurgy
Microstructure
Polymer matrix composites
Powder metallurgy
Raw materials
Sintering
Sintering (powder metallurgy)
Studies
Tribology
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Summary:Carbon-coated graphite/copper composites were fabricated by using electrolytic copper powder and phenolic resin-coated graphite as raw materials via powder metallurgy method. The effect of natural graphite with phenolic resin coating on the microstructures and properties of graphite/copper composites was investigated. The results indicated that the surface of natural graphite was modified by phenolic resin. Smooth amorphous carbon shell with the thickness of 40 nm to 1 μm was formed on the surface of natural graphite after carbonizing at 900 °C for 2 h under hydrogen atmosphere. The sintering of Cu particles was accelerated by phenolic resin coating, and a continuous network-shaped Cu matrix with isolated graphite phase was formed in carbon-coated graphite/copper composites. The electrical conductivity, flexural strength, and tribological properties of graphite/copper composites were improved. •Graphite surface was modified and protected by phenolic resin coating.•The sintering between Cu particles was accelerated by phenolic resin coating.•A continuous network-shaped Cu matrix with isolated graphite was formed.•Carbon-coated graphite/copper composites have good comprehensive properties.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2018.02.051