Corrosion of YBCO bulk superconductor in air

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 spectr...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2018-08, Vol.101 (8), p.3703-3709
Main Authors: Diko, Pavel, Piovarči, Samuel, Antal, Vitaliy, Kaňuchová, Mária, Volochová, Daniela
Format: Article
Language:English
Subjects:
Barium
Barium hydroxide
Corrosion
electron microscopy
Emission analysis
Heating
Hydrates
Mass spectrometry
microstructure
Oxygenation
thermal analysis
X‐ray photo‐emission spectroscopy
YBCO superconductors
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Summary: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.
ISSN:0002-7820
1551-2916
DOI:10.1111/jace.15525