Tensile strength and fracture surface topography of Sm-Ba-Cu-O bulk superconductors

A. Murakami, K. Katagiri, K. Kasaba, Y. Shoji, K. Noto, Naomichi Sakai, Masato Murakami

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Scanning electron microscopy observations have been made on fracture surfaces induced by tensile tests of Ag-added SmBa2Cu3Oy/Sm2BaCuO5 composite bulk superconductors melt-grown in O2 and 1%O2/Ar atmospheres. It was deduced that the inferior tensile strength in the bulk grown in l%O2/Ar, as compared with that of the bulk grown in O2, was caused by the larger size and volume fraction of the included voids. The tensile strength of a specimen with a fracture surface consisting of multiple facets was lower than that with a single facet for the bulks grown in both conditions. It was found that a rectangular facet on the fracture surface is a possible origin for the fatal crack and that the secondary phase particles on that area act as anchoring points for initial crack propagation.

Original languageEnglish
Pages (from-to)1099-1104
Number of pages6
JournalSuperconductor Science and Technology
Volume15
Issue number7
DOIs
Publication statusPublished - 2002 Jul
Externally publishedYes

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Surface topography
tensile strength
Superconducting materials
flat surfaces
topography
Tensile strength
crack propagation
tensile tests
voids
Crack propagation
Volume fraction
cracks
Cracks
atmospheres
Scanning electron microscopy
scanning electron microscopy
composite materials
Composite materials

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Tensile strength and fracture surface topography of Sm-Ba-Cu-O bulk superconductors. / Murakami, A.; Katagiri, K.; Kasaba, K.; Shoji, Y.; Noto, K.; Sakai, Naomichi; Murakami, Masato.

In: Superconductor Science and Technology, Vol. 15, No. 7, 07.2002, p. 1099-1104.

Research output: Contribution to journalArticle

Murakami, A. ; Katagiri, K. ; Kasaba, K. ; Shoji, Y. ; Noto, K. ; Sakai, Naomichi ; Murakami, Masato. / Tensile strength and fracture surface topography of Sm-Ba-Cu-O bulk superconductors. In: Superconductor Science and Technology. 2002 ; Vol. 15, No. 7. pp. 1099-1104.
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