Effects of densification of precursor pellets on microstructures and critical current properties of YBCO melt-textured bulks

Yui Setoyama, Jun ichi Shimoyama, Takanori Motoki, Kohji Kishio, Satoshi Awaji, Koichi Kon, Naoki Ichikawa, Satoshi Inamori, Kyogo Naito

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Effects of densification of precursor disks on the density of residual voids and critical current properties for YBCO melt-textured bulk superconductors were systematically investigated. Six YBCO bulks were prepared from precursor pellets with different initial particle sizes of YBa2Cu3Oy (Y123) powder and applied pressures for pelletization. It was revealed that use of finer Y123 powder and consolidation using cold-isostatic-pressing (CIP) with higher pressures result in reduction of residual voids at inner regions of bulks and enhance Jc especially under low fields below the second peak.

Original languageEnglish
Pages (from-to)79-84
Number of pages6
JournalPhysica C: Superconductivity and its applications
Volume531
DOIs
Publication statusPublished - 2016 Dec 15

Keywords

  • Critical current density
  • Peak effect
  • Porosity
  • YBCO bulk superconductors

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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