Tensile strength and fracture surface topography of Sm$ndash$Ba$ndash$Cu$ndash$O bulk superconductors
Year: 2002
Type: article
Abstract: Scanning electron microscopy observations have been made on fracture surfaces induced by tensile tests of Ag-added SmBa 2 Cu 3 O y /Sm 2 BaCuO 5 composite bulk superconductors melt-grown in O 2 and 1%O 2 /Ar atmospheres. It was deduced that the inferior tensile strength in the bulk grown in 1%O 2 /Ar, as compared with that of the bulk grown in O 2, 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.
Institution: Iwate University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1958106986