Property-porosity relationships for polymer-impregnated superconducting ceramic composite

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1990.tb07595.x· OSTI ID:5854722

Salib, S; Vipulanandan, C ^[1]

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1. Texas Center for Superconducting, University of Houston, Houston, TX (US)

A thermoplastic polymer, poly(methyl methacrylate) (PMMA), was used to improve the flexural properties of the high-temperature superconducting ceramic (YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}). Ceramic specimens with different porosities were prepared by dry compacting 12.5-mm-diameter disk specimens at various uniaxial pressures. Density-pressure relationships have been developed for before- and after-sintering conditions. The PMMA polymer was impregnated into the porous ceramic at room temperature. The mechanical properties were evaluated by concentrically loading simply supported disk specimens. The load-displacement responses were analyzed using the finite-element method. Impregnation of PMMA polymer at room temperature increased the flexural strength and modulus of the superconducting ceramic without affecting its electrical properties. The flexural properties depended on the porosity of the ceramics, and, hence, linear and nonlinear property-porosity relationships have been used to characterize the behavior of superconducting ceramic with an without the polymer.

• OSTI ID: 5854722
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 73:8; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360203* -- Ceramics
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426001 -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COMPOSITE MATERIALS
DENSITY
FINITE ELEMENT METHOD
FLEXURAL STRENGTH
HIGH-TC SUPERCONDUCTORS
MATERIALS
MECHANICAL PROPERTIES
NUMERICAL SOLUTION
PHYSICAL PROPERTIES
POLYMERS
POROSITY
SUPERCONDUCTING COMPOSITES
SUPERCONDUCTORS