Applied Physics Letters · 1988 · 122 citations · 11 references
Natural SciencesMaterials EngineeringMaterials ScienceCeramic MaterialsInorganic ChemistryMaterials ChemistryAtmospheric CorrosionCorrosion-resistant MaterialsHigh-temperature CorrosionHigh-temperature MaterialsSuperconducting MaterialsChemical DurabilityCorrosion ProductsCuprate SuperconductorsHigh-temperature SuperconductivityHigh-temperature SuperconductorsSuperconducting CeramicsSuperconducting PropertiesX-ray Diffraction Analysis
The stability of YBa2Cu3O7−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 BaCO3, CuO, O2, etc. Barium hydroxide is first formed which further reacts with atmospheric CO2 to form needle-shaped crystals of BaCO3. For any practical applications, devices made from these materials would have to be protected with an impermeable coating to prevent deterioration from atmosphere.
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Evidence for superconductivity above 40 K in the La-Ba-Cu-O compound system
C. W. Chu, P. H. Hor, R. L. Meng et al. · Physical Review Letters · 1987 · 1.5K citations · Full text
High-pressure study of the new Y-Ba-Cu-O superconducting compound system
P. H. Hor, Li Gao, R. L. Meng et al. · Physical Review Letters · 1987 · 383 citations
Water interaction with the superconducting YBa2Cu3O7 phase
M. F. Yan, R. L. Barns, H. M. O’Bryan et al. · Applied Physics Letters · 1987 · 361 citations