Examination of Plasma Spray Parameters for YBa_2Cu_3O_<7-x> Coatings(Surface Processing)

概要

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This paper examines the influences of plasma spray parameters on property and structure of YBa_2Cu_3O_<7-x> coatings produced by air plasma spraying using calcinated superconducting YBa_2Cu_3O_<7-x> powder and raw material spray dried powders of Y_2O_3, 2BaCO_3 and 3CuO. As plasma spray parameters, plasma arc power, plasma gas flow rates, kind of gasses and standoff distance were adopted. In order to obtain a superconducting coating uniformly and easily by appropriate thermal treatment, it was important to suppress the decomposition of powder through plasma jet, so that it was necessary to select plasma spray conditions of lower heat content for the superconducting powders. On the other hand, it was important to facilitate the mutual reaction among 3 kinds of oxides during plasma spraying and to increase heat content for the agglomerated powders.
大阪大学の論文