Effects of Dy2BaCuO5 contents on microstructure and mechanical strength of Ag-added Dy–Ba–Cu–O bulk superconductors

We investigated the microstructure and mechanical strength of Ag-added DyBa2Cu3Oy (Dy123) bulk superconductors with various Dy2BaCuO5 (Dy211) contents. Single-grain Dy123 bulk samples 32 mm in diameter with the addition of 5-40 mol% of Dy211 and 10 wt.% of Ag2O were fabricated in air. The sample wit...

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Bibliographic Details
Published in:Physica. C, Superconductivity Superconductivity, 2004-10, Vol.412-414, p.651-656
Main Authors: Nariki, S., Sakai, N., Murakami, M., Hirabayashi, I.
Format: Article
Language:English
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Summary:We investigated the microstructure and mechanical strength of Ag-added DyBa2Cu3Oy (Dy123) bulk superconductors with various Dy2BaCuO5 (Dy211) contents. Single-grain Dy123 bulk samples 32 mm in diameter with the addition of 5-40 mol% of Dy211 and 10 wt.% of Ag2O were fabricated in air. The sample with 5 mol% Dy211 contained many macro-cracks in the ab-plane. The amount of cracks decreased with increasing Dy211 content. Three-point bending tests were performed at room temperature to measure the mechanical properties. The average bending strength of the sample with 5 mol% Dy211 was 73 MPa. The strength was improved to 95 MPa with an addition of 40 mol% Dy211.
ISSN:0921-4534
DOI:10.1016/j.physc.2004.01.084