THE HIGH TEMPERATURE OXIDATION OF BERYLLIUM. PART III. IN CARBON DIOXIDE, CARBON MONOXIDE AND CARBON MONOXIDE-CARBON DIOXIDE MIXTURES
The kinetics of the oxidation of electrolytic flake beryllium in carbon dioxide, in carbon monoxide and in carbon monoxide-carbon dioxide mixtures were measured at temperatures from 500 deg to 750 deg C. In carbon dioxide, at temperatures up to 700 deg C, the rate of oxidation continuously decreases with time to reach a very small value (e.g., at 700 deg C, 0.13 mu g/cm/sup 2/ h after 300 h) while at 750 deg C the rate first decreases and then increases, indicating breakaway. If the carbon dioxide is admitted to the preheated sample the oxidation is very rapid at first and most of the carbon deposition occurs over the initial period. In carbon monoxide, the oxidation is non-protective above 150 deg C, the rate of oxidation being considerably greater than in carbon dioxide. When beryllium is heated at 650 deg C in carbon monoxidecarbon dioxide mixtures containing up to 7.5% of carbon monoxide, the kinetics are the same as in pure carbon dioxide. (auth)
- Research Organization:
- The University, Exeter, Eng.
- NSA Number:
- NSA-15-015533
- OSTI ID:
- 4040053
- Journal Information:
- J. Nuclear Materials, Journal Name: J. Nuclear Materials Vol. Vol: 3
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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