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)


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.


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


  1. 1.
    Male KB, Hrapovic S, Liu Y, Wang D, Luong JHT (2004) Electrochemical detection of carbohydrates using copper nanoparticles and carbon nanotubes. Anal Chim Acta 516(1):35–41. Scholar
  2. 2.
    Mazloum A, Kováčik J, Emmer Š, Sevostianov I (2016) Copper–graphite composites: thermal expansion, thermal and electrical conductivities, and cross-property connections. J Mater Sci 51(17):7977–7990. Scholar
  3. 3.
    Hwang J, Yoon T, Jin SH, Lee J, Kim TS, Hong SH, Jeon S (2013) Enhanced mechanical properties of graphene/copper nanocomposites using a molecular-level mixing process. Adv Mater 25(46):6724–6729CrossRefGoogle Scholar
  4. 4.
    Li X, Tang W, Reynolds A, Tayon W, Brice C (2016) Strain and texture in friction extrusion of aluminum wire. J Mater Process Technol 229:191–198CrossRefGoogle Scholar
  5. 5.
    Catalini D, Kaoumi D, Reynolds AP, Grant GJ (2013) Friction consolidation of MA956 powder. J Nucl Mater 442(1, Supplement 1):S112–S118. Scholar
  6. 6.
    Li X, Tang W, Reynolds A (2013) Material flow and texture in friction extruded wire. Friction stir welding and processing VII. Springer, Cham, pp 339–347Google Scholar
  7. 7.
    Whalen S, Jana S, Catalini D, Overman N, Sharp J (2016) Friction consolidation processing of n-type bismuth-telluride thermoelectric material. J Electron Mater 45(7):3390–3399. Scholar
  8. 8.
    Jiang X, Whalen SA, Darsell JT, Mathaudhu S, Overman NR (2017) Friction consolidation of gas-atomized Fe Si powders for soft magnetic applications. Mater Charact 123:166–172CrossRefGoogle Scholar
  9. 9.
    Baffari D, Buffa G, Fratini L (2016) Influence of process parameters on the product integrity in friction stir extrusion of magnesium alloys. In: Paper presented at the key engineering materialsGoogle Scholar
  10. 10.
    Li X, Baffari D, Reynolds A (2018) Friction stir consolidation of aluminum machining chips. Int J Adv Manuf Technol 94(5–8):2031–2042CrossRefGoogle Scholar
  11. 11.
    Overman NR, Whalen SA, Bowden ME, Olszta MJ, Kruska K, Clark T, Mathaudhu SN (2017) Homogenization and texture development in rapidly solidified AZ91E consolidated by Shear Assisted Processing and Extrusion (ShAPE). Mater Sci Eng A 701:56–68. Scholar
  12. 12.
    Darsell JT, Overman NR, Joshi VV, Whalen SA, Mathaudhu SN (2018) Shear Assisted Processing and Extrusion (ShAPE™) of AZ91E Flake: a study of tooling features and processing effects. J Mater Eng Perform. Scholar
  13. 13.
    Catalini D, Kaoumi D, Reynolds AP, Grant GJ (2015) Dispersoid distribution and microstructure in Fe-Cr-Al ferritic oxide dispersion-strengthened alloy prepared by friction consolidation. Metall Mater Trans A 46(10):4730–4739. Scholar
  14. 14.
    Li X, Tang W, Reynolds AP (2012) Visualization of material flow in friction extrusion. In: ICAA13 Pittsburgh, pp. 1659–1664. Springer, ChamCrossRefGoogle Scholar
  15. 15.
    Bui HT, Tran BT, Le DQ, Than XT, Doan DP, Phan NM (2011) The effect of sintering temperature on the mechanical properties of a Cu/CNT nanocomposite prepared via a powder metallurgy method. Adv Nat Sci Nanosci Nanotechnol 2(1):015006CrossRefGoogle Scholar

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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