Oxidation properties of Zr–Nb alloys at 973–1273 K in air |
| |
| Authors: | Tatsumi Arima Kensaku Miyata Kazuya Idemitsu Yaohiro Inagaki |
| |
| Affiliation: | 1. Key Laboratory of Electromagnetic Processing of Materials (Ministry of Education), Northeastern University, Shenyang, 110819, China;2. School of Materials Science and Engineering, Northeastern University, Shenyang, 110819, China;1. Department of Mechanical and Nuclear Engineering, Penn State University, University Park 16802, PA, USA;2. EDF Research and Development, Materials and Mechanics of Components, Ecuelles, 77818 Moret-sur-Loing, France;1. University of Bolton, Bolton BL3 5AB, UK;2. State Nuclear Bao Ti Zirconium Industry Company, Baoji 721013, China;3. Institute of Metal Research Chinese Academy of Sciences, Shenyang, 110016, China;4. General Research Institute for Nonferrous Metals, Beijing 100088, China |
| |
| Abstract: | In order to investigate the oxidation behavior of LWR cladding materials under the condition of reactor accidents, e.g. LOCA, Zr–Nb alloys with 1–10 wt%Nb and Zircaloy-4 (0 wt%Nb) were oxidized at 973–1273 K in dry air. The weight gain due to oxidation increased with Nb content at 973 and 1073 K was the smallest for 2.5 wt%Nb at 1173 and 1273 K. The oxidation kinetics obeyed the parabolic rate law without a few cases, e.g. 6–10 wt%Nb and 1273 K. The parabolic rate constant at high temperatures had the somewhat low activation energy compared to that at low temperatures. These results implied that such oxidation behaviors of Zr–Nb alloys related to the lattice structures of oxide films as well as underlying metal during oxidation. Especially at high temperatures, 6ZrO2–Nb2O5 compound might promote the oxidation of Zr–Nb alloys with high content of Nb. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
