Accession Number : ADP007748

Title :   Microstructural Evolution of YBa2Cu3O7-x Using Microwave Energy,

Corporate Author : FLORIDA UNIV GAINESVILLE DEPT OF MATERIALS SCIENCE AND ENGINEERING

Personal Author(s) : Cozzi, A. D. ; Jones, D. K. ; Fathi, Z. ; Clark, D. E.

Report Date : 27 APR 1992

Pagination or Media Count : 8

Abstract : Discs of YBa2Cu3 O sub 7-x were sintered at 2.45 GHz in a Raytheon modelQMP2101B-6 microwave oven using hybrid heating. Heating YBa2Cu3 O sub 7-x solely by microwaves is feasible, but a silicon carbide susceptor was used to insulate the discs and provide a more uniform thermal environment. In order to begin with a uniform green microstructure, the discs were slip-cast from a non-aqueous dispersion containing fine YBa2Cu3 O sub 7-x powder. The effects of varying times and temperatures on the microstructural uniformity, densification, and grain growth were investigated using optical and quantitative microscopy.

Descriptors :   *MICROWAVES, *YTTRIUM ALLOYS, *SINTERING, CARBIDES, DISPERSIONS, ENVIRONMENTS, FINES, GRAIN GROWTH, HEATING, MICROSCOPY, MICROSTRUCTURE, MICROWAVE OVENS, POWDERS, SILICON, SILICON CARBIDES, TEMPERATURE, UNIFORMS, SUPERCONDUCTIVITY, SUPERCONDUCTORS, SYMPOSIA.

Subject Categories : Fabrication Metallurgy
      Radiofrequency Wave Propagation
      Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE