Processing-microstructure-property relationships of Al[sub 2]O[sub 3]-fiber-reinforced high-temperature superconducting (Bi,Pb)[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub y] composite

Journal Article · Tue Nov 01 00:00:00 EST 1994 · Journal of the American Ceramic Society; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1994.tb04512.x· OSTI ID:6871199

Wong, M S; Miyase, A; Yuan, Y S; Wang, S S ^[1]

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1. Univ. of Houston, TX (United States)

Monolithic high-temperature superconducting (HTS) materials are recognized to have inherently weak mechanical properties, such as low strength and fracture toughness. These drawbacks usually can be improved by introducing strong continuous fibers into the brittle ceramic materials. In this study, a systematic investigation on the relationships among processing variables, microstructure, and superconducting and mechanical properties of a continuous Al[sub 2]O[sub 3]-fiber-reinforced HTS (Bi,Pb)[sub 2]Sr[sub 2]Ca[sub 2]Cu[sub 3]O[sub y] composite is presented. The Al[sub 2]O[sub 3]/BPSCCO composite is fabricated initially by a slurry method, followed by binder extraction up to 800 C in an 8% O[sub 2] atmosphere, and finally hot pressed at 800 C in an 8% O[sub 2] atmosphere, and finally hot pressed at 800 C in air. Phases present in the HTS composite are identified by XRD, and the microstructure and microchemistry studied by SEM and EPMA. Of particular interest is the fiber/matrix interface; the interfacial reaction is studied for composite specimens which have undergone long heat treatment. The HTS composite is observed to have a good combination of superconducting properties and mechanical properties.

• OSTI ID: 6871199
• Journal Information: Journal of the American Ceramic Society; (United States), Vol. 77:11; ISSN 0002-7820
• Country of Publication: United States
• Language: English

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