Microstructural characteristics and different effects of 800-1200 degrees preformed oxides on high-temperature steam oxidation of a zirconium alloy cladding 机翻标题: 暂无翻译,请尝试点击翻译按钮。

来源
Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics
年/卷/期
2018 / 753 /
页码
119-129
ISSN号
0925-8388
作者单位
KEPCO Nucl Fuel, 989 Beon Gil 242, Daejeon 34057, South Korea;Ulsan Natl Inst Sci & Technol, 50 UNIST Gil, Ulsan 689798, South Korea;Ulsan Natl Inst Sci & Technol, 50 UNIST Gil, Ulsan 689798, South Korea;Ulsan Natl Inst Sci & Technol, 50 UNIST Gil, Ulsan 689798, South Korea;Ulsan Natl Inst Sci & Technol, 50 UNIST Gil, Ulsan 689798, South Korea;
作者
Mok, Yong-Kyoon;Sohn, Dong-Seong;Lee, Cheol Min;Jeong, Hu Yeong;Yoon, Aram;
摘要
Zr-1Nb-lSn-0.lFe nuclear fuel cladding tube was pre-oxidised at five different temperatures (803, 908, 1012,1112, and 1200 degrees), and subsequent oxidation tests were performed at 1012 degrees . All the pre-oxidised specimens showed a little or no breakaway oxidation after the subsequent oxidation at 1012 degrees for 5130 s, but the non-pre-oxidised specimen showed a severe breakaway oxidation after the subsequent oxidation at 1012 degrees for 5130 s. In addition, comparing the weight gains and oxide thicknesses of the pre-oxidised specimens with those of the non-pre-oxidised specimens, all the preformed oxides were effective in enhancing the oxidation resistance, and the preformed oxide formed at higher temperature was more effective. The preformed oxides were examined using electron probe microanalyser and transmission electron microscopy, which showed that the fraction of Zr-Sn type precipitates increased with increasing the pre-oxidation temperature. This phase change of the precipitates may cause the preformed oxide formed at higher temperature to exhibit better oxidation resistance enhancement. (c) 2018 Elsevier B.V. All rights reserved.
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关键词/主题词
Zirconium alloy;Preformed oxide;Precipitate;EPMA;TEM;
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