Premium
Processing–Microstructure–Property Relationships of Al 2 O 3 ‐Fiber‐Reinforced High‐Temperature Superconducting (Bi,Pb) 2 Sr 2 Ca 2 Cu 3 O y Composite
Author(s) -
Wong MingShih,
Miyase Akira,
Yuan YuSheng,
Wang Su Su
Publication year - 1994
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1994.tb04512.x
Subject(s) - microstructure , materials science , composite number , composite material , ceramic , fiber , electron microprobe , high temperature superconductivity , fracture toughness , electroceramics , superconductivity , brittleness , slurry , fabrication , metallurgy , medicine , microfabrication , physics , alternative medicine , pathology , quantum mechanics
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 2 O 3 ‐fiber‐reinforced HTS (Bi,Pb) 2 Sr 2 Ca 2 Cu 3 O y composite is presented. The Al 2 O 3 /BPSCCO composite is fabricated initially by a slurry method, followed by binder extraction up to 800°C in an 8% O 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.