, Volume 61, Issue 7–8, pp 717–725 | Cite as

Creep Deformation of Carbon-Based Cathode Materials for Low-Temperature Aluminum Electrolysis

  • Wei Wang
  • Weijie Chen
  • Wanduo Gu

The uniaxial-compression creep behavior of semi-graphitic carbon products was investigated using modified Rapoport equipment in a K3AlF6–Na3AlF6–AlF3 and a Na3AlF6–AlF3 system. The stress exponent is low for the K3AlF6–Na3AlF6–AlF3 system in the steady-state creep stage. With an increase in graphitization degree and grain size, the interlayer space and porosity of the tested samples decrease after aluminum electrolysis. A low temperature can suppress carbon-cathode damage. Based on these stress exponents and a microstructural investigation using transmission electron microscopy, it is proposed that dislocation glide is the dominant creep mechanism for the carbon cathode during aluminum electrolysis in the steady-state creep stage.


creep carbon cathode stress exponent aluminum electrolysis potassium cryolite 



Financial support from the Collaborative Innovation Center of Nonferrous Metals Henan Province (15A450001) is gratefully acknowledged.


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© Springer Science+Business Media, LLC, part of Springer Nature 2017

Authors and Affiliations

  • Wei Wang
    • 1
    • 2
  • Weijie Chen
    • 1
  • Wanduo Gu
    • 2
  1. 1.College of Materials Science and EngineeringHenan University of Science and TechnologyLuoyangChina
  2. 2.Collaborative Innovation Center of Nonferrous Metals Henan ProvinceLuoyangChina

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