<正> Y-Ba-Cu系氧化物在液氮温区的高温超导电性被发现以来,其潜在应用价值引起了人们的极大兴趣。由于陶瓷材料所特有的高脆性使其加工性能极差,有效的成材途径成为这种氧化物超导陶瓷的实用化进程中主要研究方向之一。我们曾报道了用等离子喷涂工艺制备成YBa_2Cu_3O_(7-x)超导涂层的结果,运用此方法可以方便、灵活、有效地在多种基材上复合超导材料,得到超导电气元件。Neiser等及Cuomo等的结果也证实了
A high T_c oxide YBaCuO superconducting coating has been prepared by plasmaspraying method. The structure and phase transformation of the coating during spraying and after-annealing treatment process were studied by X-ray diffraction, TEM, SEM and DTA technique.The results show that the as-sprayed coating lost its superconductivity completely at liquid nitro-gen temperature and was composed mainly of microcrystalline and amorphous structure. Its su-perconductivity can be restored by a proper annealing at 850--950℃.
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