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Excellent Tribological Properties of Lower Reduced Graphene Oxide Content Copper Composite by Using a One-Step Reduction Molecular-Level Mixing Process

1
College of Material Science and Engineering, Hunan University, Changsha 410082, China
2
Hunan Province Key Laboratory for Spray Deposition Technology and Application, Changsha 410082, China
*
Authors to whom correspondence should be addressed.
Materials 2018, 11(4), 600; https://doi.org/10.3390/ma11040600
Received: 26 March 2018 / Revised: 8 April 2018 / Accepted: 10 April 2018 / Published: 13 April 2018
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Abstract

Reduced graphene oxide (RGO) composite copper matrix powders were fabricated successfully by using a modified molecular-level mixing (MLM) method. Divalent copper ions (Cu2+) were adsorbed in oxygen functional groups of graphene oxide (GO) as a precursor, then were reduced simultaneously by one step chemical reduction. RGO showed a distribution converting from a random to a three-dimensional network in the copper matrix when its content increased to above 1.0 wt.% The tribological tests indicated that the friction coefficient of the composite with 1.0 wt.% RGO decreased markedly from 0.6 to 0.07 at an applied load of 10 N, and the wear rate was about one-third of pure copper. The excellent tribological properties were attributed to a three-dimensional and uniform distribution, which contributes to improving toughness and adhesion strength. View Full-Text
Keywords: copper; reduced graphene oxide; network structure; tribological properties copper; reduced graphene oxide; network structure; tribological properties
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Nie, H.; Fu, L.; Zhu, J.; Yang, W.; Li, D.; Zhou, L. Excellent Tribological Properties of Lower Reduced Graphene Oxide Content Copper Composite by Using a One-Step Reduction Molecular-Level Mixing Process. Materials 2018, 11, 600.

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