|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||METALS, CERAMICS, AND OTHER MATERIALS ♦ DIFFUSION ♦ DISTRIBUTION ♦ MEASURED VALUES ♦ OXIDATION ♦ OXYGEN ♦ PRESSURE ♦ QUANTITY RATIO ♦ REACTION KINETICS ♦ TEMPERATURE ♦ THICKNESS ♦ WEIGHT ♦ ZIRCONIUM ♦ ZIRCONIUM OXIDES|
|Abstract||The oxidation kinetics of zirconium were determined in the temperature range 400-- 600 deg C at subatmospheric pressures for exposure times of 650 hr at 400 deg C to 160 hr at 600 deg C by a microbalance technique. From scale thickness measurements, it was found that at temperatures between 14 to 23% of the total oxygen consumption, respectively. Further both the oxidation kinetics and the oxygen distribution between the metal and the oxide were found to be independent of changes of oxygen pressure from 0.25 to 50 cm Hg. The kinetics were fitted to a parabolic rate relation alter an initial deviation. In the parabolic range, oxidation behavior approximated to a model in which the oxidation rate was determined by oxygen diffusion in both the oxide and metal. (auth)|
|Learning Resource Type||Article|
|Journal||Journal of the Electrochemical Society|
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