Microstructure of plasma-sprayed YBa2Cu-IOx high-temperature superconductors
L. PAWLOWSKI, A. GROSS, R. McPHERSON
JOURNAL OF MATERIALS SCIENCE
Abstract
The arc plasma spraying process has been applied to deposit YBaCuO superconductors on to steel substrates. Detached, as-sprayed coatings were heat treated at 950 ~ in air in order to restore superconductivity. Oxygen annealing at temperatures 400-500 ~ has been usedas the final stage in material preparation. The changes in the microstructure of the material during heat treatment have been followed with the aid of scanning electron and optical microscopy. The phase transformations resulting from heat treatment have been studied by differential thermal analysis and X-ray diffraction.
Key Words：plasma spraying
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