Abstract
The detrimental effect of water on the Y1Ba2Cu3O7-δ superconducting ceramics has been studied using X-ray diffraction, infrared spectroscopy and transmission electron microscopy. It has been shown that barium carbonate is the major reaction product after reaction. From the viewpoint of the process, the reaction is shown to occur in three stages, e.g. (I) microcrack formation along the layers perpendicular to the c-axis; (II) lattice dissolution which is a consequence of the increasing microcrack density and their subsequent propagation; (III) the formation of the corrosion product.
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