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Journal of Materials Science

, Volume 30, Issue 3, pp 763–769 | Cite as

Mechanical and physical properties of sintered YBCO-metal bulk composites with silver powder and fibres

  • C. Vipulanandan
  • S. Salib
Papers

Abstract

Silver powder and continuous fibres were used in developing sintered YBa2Cu3O7−x (YBCO)-metal composites because applications require further improvement in mechanical and physical properties of the bulk superconducting elements without affecting the critical current capacity. The weight ratios of silver powder to YBCO and silver fibre to YBCO were varied up to 50% and 5%, respectively, in the beam elements. The effect of silver addition on the density of the composite has been quantified. Stress-strain-critical current properties of bulk YBCO-metal composite elements were investigated in bending at 77 K. The addition of silver powder reduced the sintering temperature, increased the dimensional changes after sintering and also improved the strength, toughness and critical current capacity compared to the monolithic. Silver fibres, (aspect ratios varying between 70 and 110), aligned along the length of the element restricted the changes in dimensions of the composite after sintering and also influenced the stress-strain-current capacity relationship, strength and toughness of the composite to varying degrees. The mixture theory was used to predict the composite flexural strength based on the composition of the composite, constituent properties and porosity.

Keywords

Porosity Aspect Ratio Weight Ratio Composite Element Material Processing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • C. Vipulanandan
    • 1
  • S. Salib
    • 1
  1. 1.Materials Engineering Laboratory, Texas Center for Superconductivity at the University of HoustonUniversity of HoustonHoustonUSA

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