Corrosion of YBCO bulk superconductor in air |
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| Authors: | Pavel Diko Samuel Piovar?i Vitaliy Antal Mária Kaňuchová Daniela Volochová |
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| Affiliation: | 1. Institute of Experimental Physics SAS, Ko?ice, Slovakia;2. FBERG, Technical University of Ko?ice, Ko?ice, Slovakia |
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| Abstract: | A corrosion process caused by reaction of surfaces of oxygenation cracks of YBCO bulk single‐grain superconductor with air moisture was studied. X‐ray photo‐emission spectroscopy, done on air exposed (001) surfaces, confirmed oxygen bonds related to barium hydroxide. Thermal analyses and mass spectrometry of exposed samples has shown a release of water caused by decomposition of barium hydroxide hydrates during sample heating. The sample weight increase versus time was related to formation of barium hydroxide phases at the surfaces of oxygenation cracks. The morphological changes of these phases at heating were observed with scanning electron microscope. |
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| Keywords: | electron microscopy mass spectrometry microstructure thermal analysis X‐ray photo‐emission spectroscopy YBCO superconductors |
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