Microstructures and Mechanical Properties of Bi-Sr-Ca-Cu-O/Ag Superconductor Composites

Yumiko Ikuhara, Toshiyuki Suzuki, Kazuo Michishita, Yukio Kubo, Yuichi Ikuhara

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The effects of Ag addition on the mechanical and superconducting properties of Bi2Sr2CaCu2Ox (BSCCO) superconductors were studied, and their microstructures were observed mainly by transmission electron microscopy (TEM). The addition of 10 wt% Ag resulted in an increase in average bending strength from 126 to 170 MPa, in Weibul modulus from 3.8 to 9.8 and in the hardness normal to the c plane from 38.7 to 51.8 kgf/mm2. The critical current density (Jc) of BSCCO bulk was also increased by addition of Ag. Ag existed as fine particles with the size of about 1 μm inside BSCCO grains, and as the second phase at grain boundaries. The Ag phase was strengthened by coherent fine particles of Cu. At the interface between Ag and BSCCO, a Bi-0 single layer existed. The mechanical properties of Ag/BSCOO composites were discussed from the view point of the microstructures.

Original languageEnglish
Pages (from-to)700-704
Number of pages5
JournalJournal of the Society of Materials Science, Japan
Volume44
Issue number501
DOIs
Publication statusPublished - 1995
Externally publishedYes

Keywords

  • Bi2Sr2CaCu2Ox
  • Composite materials
  • Critical current density
  • Mechanical properties
  • Microstructure
  • Silver
  • Superconductor

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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