Corrosion induced degradation of textured YBCO under operation in high humidity conditions
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The early stages of aggressive degradation at 85% of humidity for 24 h of single crystals of YBa2Cu3O7 − δ textured by Bridgman technique have been analyzed by means of atomic force microscopy, X-ray photoelectron spectroscopy, nanoindentation and focused ion beam. The results show that the initial formation of barium hydroxide and the non-superconducting green phase, Y2BaCuO5, induces the surface degradation and the loss of the mechanical properties as a consequence of the mechanical transformation after the degradation process due to an embrittlement of the superficial layer.
CitationRoa, J. [et al.]. Corrosion induced degradation of textured YBCO under operation in high humidity conditions. "Surface and coatings technology", 25 Maig 2012, vol. 206, núm. 19-20, p. 4256-4261.