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

A. Murakami; K. Katagiri; K. Kasaba; Y. Shoji; K. Noto; N. Sakai; M. Murakami

doi:10.1088/0953-2048/15/7/321

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

A. Murakami, K. Katagiri, K. Kasaba, Y. Shoji, K. Noto, N. Sakai, M. Murakami

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

Scanning electron microscopy observations have been made on fracture surfaces induced by tensile tests of Ag-added SmBa₂Cu₃O_y/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 language	English
Pages (from-to)	1099-1104
Number of pages	6
Journal	Superconductor Science and Technology
Volume	15
Issue number	7
DOIs	https://doi.org/10.1088/0953-2048/15/7/321
Publication status	Published - 2002 Jul 1
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
Condensed Matter Physics
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1088/0953-2048/15/7/321

Cite this

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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.",

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T1 - Tensile strength and fracture surface topography of Sm-Ba-Cu-O bulk superconductors

AU - Murakami, A.

AU - Katagiri, K.

AU - Kasaba, K.

AU - Shoji, Y.

AU - Noto, K.

AU - Sakai, N.

AU - Murakami, M.

PY - 2002/7/1

Y1 - 2002/7/1

N2 - 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.

AB - 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.

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

Abstract

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