Advertisement

Effect of carbon fibre on properties of TiB2/C composite cathode coating for aluminum electrolysis

  • Jie Li (李 劼)
  • Xiao-jun Lü (吕晓军)Email author
  • Yan-qing Lai (赖延清)
  • Qing-yu Li (李庆余)
  • Zhong-liang Tian (田忠良)
  • Zhao Fang (方钊)
Article

Abstract

The tensile strength, compressive strength and electrical resistivity of TiB2/C composite cathode coating were measured with a hydraulic pressure universal test machine and an electrical resistivity test device, and the effects of carbon fibre content and carbon fibre length on tensile strength, compressive strength and electrical resistivity were investigated. The results show that the tensile strength of coating increases at the beginning and then reduces with the increase of carbon fibre content when the carbon fibre (length of 3 mm) content ranges from 0 to 4.0%; at the carbon fibre content of 1.5%, the tensile strength of coating reaches the maximum, 25.6 MPa. For the coating with carbon fibre content of 1.5%, the carbon fibre length has a great influence on tensile strength and compressive strength of coating; when the carbon fibre length is 6 mm, the tensile strength and compressive strength of coating reach the maximum, 27.6 MPa and 39.2 MPa, respectively. The electrical resistivity of coating reduces with the rise of temperature and the length of carbon fibre, and the influence of carbon fibre length on electrical resistivity of coating at low temperature (30–200 °C) is more obvious than that at high temperature (960 °C).

Key words

aluminum electrolysis TiB2 coating electrical resistivity tensile strength compressive strength 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    WELCH B J. Future materials requirements for the high-energy-intensity production of aluminum [J]. Journal of Metal, 2001, 53(2): 13–15.Google Scholar
  2. [2]
    MCMINN C J. A review of RHM cathode development [C]// CUTSHALL E R. Light Metals 1992. Warrendale: TMS, 1992: 419–425.Google Scholar
  3. [3]
    PAWLEK R P. Aluminum wettable cathodes: An update [C]// PETERSON R D. Light Metals 2000. Warrendale: TMS, 2000: 449–454.Google Scholar
  4. [4]
    DIONNE M, LESPERANCE G, MIRTCHI A. Wetting of TiB2-carbon material composite[C]// ECKERT C E. Light Metals 1999. Warrendale: TMS, 1999: 389–394.Google Scholar
  5. [5]
    BROWN C W. Wettability of TiB2-based cathodes in low-temperature slurry-electrolyte reduction cells [J]. Journal of Metal, 1998, 50(2): 38–40.Google Scholar
  6. [6]
    SEKHAR J A, de NORA V, LIU J, WANG X. TiB2/colloidal alumina carbon cathode coating in Hall-Heroult and drained cells [C]// WELCH B. Light Metals 1998. Warrendale: TMS, 1998: 605–615.Google Scholar
  7. [7]
    ALTON T, BROWN J, IVAN E, WILLIAM M. The operational performance of 70 kA prebake cells retrofitted with TiB2-G cathode elements [C]// WELCH B. Light Metals 1998. Warrendale: TMS, 1998: 257–264.Google Scholar
  8. [8]
    LAI Yan-qing, LI Qing-yu, YANG Jian-hong, LI Jie. Ambient temperature cured TiB2 cathode coating for aluminum electrolysis [J]. Trans Nonferrous Met Soc China, 2003, 13(3): 704–707.Google Scholar
  9. [9]
    LIAO Xian-an, ØYE H A. Effects of carbon-bonded coatings on sodium expansion of the cathode in aluminum electrolysis [C]// ECKERTC E. Light Metals 1999. Warrendale: TMS, 1999: 629–636.Google Scholar
  10. [10]
    LI Qing-yu, LAI Yan-qing, LI Jie, YANG Jian-hong, CHEN Zhu. The effect of sodium-containing additives on the sodium-penetration resistance of TiB2/C composite cathode in aluminum electrolysis [C]// KVANDE H. Light Metals 2005. Warrendale: TMS, 2005: 789–791.Google Scholar
  11. [11]
    LIAO Xian-an, HUANG Yong-zhong, LIU Ye-xiang. Potline-scale application of TiB2 coating in Hefei Aluminum & Carbon Plant [C]// WELCH B. Light Metals1998. Warrendale: TMS, 1998: 685–688.Google Scholar
  12. [12]
    LI Qing-yu, LAI Yan-qing, LI Jie, YANG Jian-hong, LIU Ye-xiang. Sodium penetration resistance of ambient temperature cured TiB2 cathode coating [J]. Journal of Central South University: Natural Science, 2004, 35(6): 907–910. (in Chinese)Google Scholar
  13. [13]
    LI Jie, LÜ Xiao-jun, LI Qing-yu, LAI Yan-qing, YANG Jian-hong. Electrical resistivity of TiB2/C composite cathode coating for aluminum electrolysis [J]. Journal of Central South University of Technology, 2006, 13(3): 209–213.CrossRefGoogle Scholar
  14. [14]
    HU Fu-zeng, CHEN Guo-rong. Material surface and interface [M]. Shanghai: East China Science and Technology University Press, 2001. (in Chinese)Google Scholar
  15. [15]
    LI Qing-yu. Development and industrial application of wettable inert TiB2 cathodic composite coating for aluminum electrolysis [D]. Changsha: Central South University, 2003. (in Chinese)Google Scholar
  16. [16]
    NING Ping, HU Jian, YI Feng, XIA Lin. Structure and performance of TLCP composite material as a reinforcing agent of carbon fibre [J]. Transactions of South China Science and Technology: Science and Technology, 2003, 31(9): 62–65. (in Chinese)Google Scholar

Copyright information

© Central South University Press and Springer-Verlag GmbH 2008

Authors and Affiliations

  • Jie Li (李 劼)
    • 1
  • Xiao-jun Lü (吕晓军)
    • 1
    Email author
  • Yan-qing Lai (赖延清)
    • 1
  • Qing-yu Li (李庆余)
    • 1
    • 2
  • Zhong-liang Tian (田忠良)
    • 1
  • Zhao Fang (方钊)
    • 1
  1. 1.School of Metallurgical Science and EngineeringCentral South UniversityChangshaChina
  2. 2.School of Chemistry and Chemical EngineeringGuangxi Normal UniversityGuilinChina

Personalised recommendations