Abstract
Copper matrix composites were prepared through spark plasma sintering (SPS) process, mixing fixed amount of reduced graphene oxide (rGO) with the different amounts of Cr. In the sintered bulk composites, the layered rGO network and uniform Cr particles distributed in the Cu matrix. Both of mechanical blending and freeze-drying stages of the wet-mixing process obtained the Cu/Cr/rGO mixture powders, and then SPS solid-phase sintering realized the faster densification of these mixture powders. The hardness and compressive yield strength of the Cu–Cr–rGO composites depicted the higher values than those of pure Cu and single rGO-added composite, and they were gradually increased with increasing Cr. The rGO/Cr hybrid second-phases are believed to be beneficial to strengthening Cu matrix. The relevant formation and strengthening mechanisms involved in Cu–Cr–rGO composites were discussed.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant Nos. 51605413 and 51701174), the Natural Science Foundation of Jiangsu Province (Grant No. BK20160436) and the Flagship Major Development of Jiangsu Higher Education Institutions (Grant No. PPZY2015A025).
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Zhang, XJ., Dai, ZK., Liu, XR. et al. Microstructural Characteristics and Mechanical Behavior of Spark Plasma-Sintered Cu–Cr–rGO Copper Matrix Composites. Acta Metall. Sin. (Engl. Lett.) 31, 761–770 (2018). https://doi.org/10.1007/s40195-018-0711-y
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DOI: https://doi.org/10.1007/s40195-018-0711-y