Abstract
Copper-graphite composites wires are manufactured by a novel friction stir processing named Shear-Assisted Processing and Extrusion (ShAPE). Two types of precursors have been prepared respectively: a blend of copper and graphite powder; solid copper cylinders having pre-drill holes filled with graphite powder. The precursor material was consolidated and extruded in one step by ShAPE. Up to 800 mm long defect-free wires were produced. The metallographic inspection on both transverse cross-section and longitudinal cross-section confirms the good integrity of the ShAPE Cu-graphite wires. Energy dispersive spectroscopy and electron backscatter diffraction indicate the graphite particles were reduced to sub-micro size and uniformly dispersed in the copper matrix. The ultrafine graphite particle inhibits the grain growth thus improving the hardness . The processing temperature is below 550 °C which is much lower compared to conventional manufacturing methods.
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Li, X., Grant, G., Zhou, C., Wang, H., Perry, T., Schroth, J. (2019). Copper-Graphite Composite Wire Made by Shear-Assisted Processing and Extrusion. In: Hovanski, Y., Mishra, R., Sato, Y., Upadhyay, P., Yan, D. (eds) Friction Stir Welding and Processing X. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-05752-7_15
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DOI: https://doi.org/10.1007/978-3-030-05752-7_15
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