Oxygen diffusion in single-crystal tetragonal zirconia

Journal Article · Mon Apr 01 04:00:00 EST 1991 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2085733· OSTI ID:5125062

Park, K; Olander, D R ^[1]

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1. Materials Sciences Div., Lawrence Berkeley Lab., Berkeley, CA (US)

This paper reports on the gas-solid isotope exchange method using H{sub 2}O{sup 18} with the continuously recording gravimetric technique employed for the measurement of the oxygen tracer diffusion coefficient in single-crystal zirconia. In the temperature range investigated (1300-1600{degrees} C) the tetragonal form of the oxide is stable. Both helium and hydrogen atmospheres were used, the latter to determine the effect of hydrogen on oxygen mobility in the solid. Oxygen diffusion was found to be strongly dependent on trivalent impurities in the oxide. The oxygen vacancy diffusivity was determined from tracer diffusivity measurements in specimens of different impurity levels. Chemical diffusion coefficients were also determined from the tracer diffusivities and compared with values obtained from corrosion rate data.

• OSTI ID: 5125062
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 138:4; ISSN JESOA; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
CHALCOGENIDES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALS
DIFFUSION
ELEMENTS
ISOTOPIC EXCHANGE
MONOCRYSTALS
NONMETALS
OXIDES
OXYGEN
OXYGEN COMPOUNDS
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
ZIRCONIUM COMPOUNDS
ZIRCONIUM OXIDES