Moist Corrosion and Surface Protection of YBCO Superconductors

Deawha Soh1, Zhanguo Fan2, N. Korobova3

1Department of Electronic Engineering, Myongji University,

San 38-2, Nam-dong, Yongin-city, Kyunggi-do 449-728, Korea.

2School of Material Science and Metallurgy, Northeastern University, China

3SHS Laboratory of Combustion Problems Institute, Kazakhstan

Abstract

The critical currents of sintered YBa2Cu3O6.5+d were measured as the variables with the corrosive time in the humid air. The corrosive process was studied by means of the current changes. Ag coating on the textured YBCO and polytetrafluoroethylene (PTFE) coating on the sintered YBCO were prepared. The critical current densities of different YBCO samples with and without coatings were compared. Both Ag coating and PTFE coating can well protect YBCO from moisture and CO2.