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Corrosion of YBCO bulk superconductor in air
Author(s) -
Diko Pavel,
Piovarči Samuel,
Antal Vitaliy,
Kaňuchová Mária,
Volochová Daniela
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15525
Subject(s) - materials science , barium hydroxide , barium , hydroxide , scanning electron microscope , corrosion , analytical chemistry (journal) , decomposition , oxygen , mass spectrometry , chemical engineering , metallurgy , composite material , inorganic chemistry , chemistry , environmental chemistry , organic chemistry , chromatography , engineering
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.