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Copper-Graphite Composite Wire Made by Shear-Assisted Processing and Extrusion

  • Xiao LiEmail author
  • Glenn Grant
  • Chen Zhou
  • Hongliang Wang
  • Thomas Perry
  • James Schroth
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

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.

Keywords

Shear-assisted extrusion and processing Friction extrusion Metal matrix composite Wire 

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  • Xiao Li
    • 1
    Email author
  • Glenn Grant
    • 1
  • Chen Zhou
    • 2
  • Hongliang Wang
    • 2
  • Thomas Perry
    • 2
  • James Schroth
    • 2
  1. 1.Pacific Northwest National LaboratoryRichlandUSA
  2. 2.General Motors Research and Development LaboratoryWarrenUSA

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