レーザ後処理によるプラズマ溶射超伝導膜の作成

概要

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The goal of this study is to produce a high Tc superconductive film with a wide area using the productive plasma spraying technique. As the first step of this study, the possibility of recovering the superconductive crystal and its related characteristics which has been destroyed during the plasma spraying operation is discussed. The well known superconductive powder of Bi_2Sr_2CaCu_2O_x was used as the raw material. More specifically, the powder was first plasma sprayed onto a stainless steel substrate and followed by a C0_2 laser beam irradiation together with the oxygen gas flow intended to remodify the crystal structure of the film. The resultant film was first checked with respect to its crystalline condition through the SEM observation and X-ray diffraction analysis, and then followed by the measurement of its superconductive critical temperatures of Tc (on) and Tc (end). The results showed that the laser post-treatment can recover the superconductive crystal on the plasma sprayed film and can provide a critical temperature of 62K (Tc(end)) on the film.
公益社団法人精密工学会の論文
1992-05-05