Chemical durability of high-temperature superconductor YBa/sub 2/Cu/sub 3/O/sub 7//sub -//sub x/ in aqueous environments
Journal Article
·
· Appl. Phys. Lett.; (United States)
The stability of YBa/sub 2/Cu/sub 3/O/sub 7-//sub x/ in water and 100% humidity has been investigated at three temperatures using pH measurements, x-ray diffraction, and scanning electron microscopy. The oxide-ceramic superconductor is highly unstable and reacts rapidly with water and also degrades in moisture. Dissolution of the oxide perovskite in water is highly incongruent. The corrosion products are found to be BaCO/sub 3/, CuO, O/sub 2/, etc. Barium hydroxide is first formed which further reacts with atmospheric CO/sub 2/ to form needle-shaped crystals of BaCO/sub 3/. For any practical applications, devices made from these materials would have to be protected with an impermeable coating to prevent deterioration from atmosphere.
- Research Organization:
- Materials Division, NASA--Lewis Research Center, Cleveland, Ohio 44135
- OSTI ID:
- 5530188
- Journal Information:
- Appl. Phys. Lett.; (United States), Journal Name: Appl. Phys. Lett.; (United States) Vol. 52:4; ISSN APPLA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360205* -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
ALKALINE EARTH METAL COMPOUNDS
BARIUM CARBONATES
BARIUM COMPOUNDS
BARIUM HYDROXIDES
CARBON COMPOUNDS
CARBONATES
CHEMICAL REACTIONS
COATINGS
COPPER COMPOUNDS
CORROSION
ELEMENTS
HYDROGEN COMPOUNDS
HYDROXIDES
NONMETALS
OXYGEN
OXYGEN COMPOUNDS
STABILITY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
360205* -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
ALKALINE EARTH METAL COMPOUNDS
BARIUM CARBONATES
BARIUM COMPOUNDS
BARIUM HYDROXIDES
CARBON COMPOUNDS
CARBONATES
CHEMICAL REACTIONS
COATINGS
COPPER COMPOUNDS
CORROSION
ELEMENTS
HYDROGEN COMPOUNDS
HYDROXIDES
NONMETALS
OXYGEN
OXYGEN COMPOUNDS
STABILITY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS