HIGH TEMPERATURE OXIDATION OF ZIRCONIUM AND ITS ALLOYS IN CARBON DIOXIDE (in Japanese)
The oxidation rate of reactor-grade zirconium and its 2.5% tin alloy and 0.24% iron alloy in carbon dioxide was measured at 650 to 85O deg C, and 15 to 760 mm Hg, using the weight-gain method. The results were compared with the oxidation data in oxygen, and are expressed as follows: (1) No great difference was found on the initial stage of the oxidation between the oxidation rates in carbon dioxide and in oxygen except 2.5% tin alloys. (2) In the post-breakaway period, the rate constants depended on the change of gas pressure, and the oxidation rates in carbon dioxide were lower than the oxidation rates in oxygen, and remarkably lower in 2.5% tin alloys. (3) No existence of carbon absorption was found during the oxidation of specimens in carbon dioxide by chemical analysis. It was concluded that the reaction proceeds in accordance with the equation of Zr + 2CO/sub 2/ = ZrO/sub 2/ + 2CO, and the oxidation in carbon dioxide is similar to the oxidation in lower-pressure oxygen. (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-007712
- OSTI ID:
- 4114152
- Journal Information:
- Nippon Kinzoku Gakkaishi (Japan), Journal Name: Nippon Kinzoku Gakkaishi (Japan) Vol. Vol: 24; ISSN NIKGA
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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