Abstract
Abstract In an attempt to produce a thick superconductive film of large area, an experimental study was conducted on the preparation of the film through laser post-treatment of thermal-sprayed oxide ceramic film. The ceramic powder of Bi-(Pb)-Sr Ca-Cu-O system was used as raw material. The powder was sprayed onto a stainless steel substrate using two types of spraying systems, conventional plasma spraying system and lower temperature hypersonic spraying system both followed by CO2 laser beam irradiation with oxygen gas flow to remodify the superconductive crystals in the films. The results showed that, though laser post-treatment can produce superconductive crystals in both sprayed films, higher critical temperature Tc (end) was obtained for the film prepared by the hypersonic spraying system.
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