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Oxide particle coarsening at temperature over 1473 K in 9CrODS steel
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| Title: | Oxide particle coarsening at temperature over 1473 K in 9CrODS steel |
| Authors: | Oono, N. Browse this author | | Nakamura, K. Browse this author | | Ukai, S. Browse this author →KAKEN DB | | Kaito, T. Browse this author | | Torimaru, T. Browse this author | | Kimura, A. Browse this author | | Hayashi, S. Browse this author |
| Issue Date: | Dec-2016 |
| Publisher: | Elsevier |
| Journal Title: | Nuclear materials and energy |
| Volume: | 9 |
| Start Page: | 342 |
| End Page: | 345 |
| Publisher DOI: | 10.1016/j.nme.2016.06.008 |
| Abstract: | The oxide particle coarsening was evaluated at temperature over 1473 K by means of transmission electron microscopy (TEM). After annealing of the 9CrODS extruded bar, the size of oxide particles increases while the number density decreases, indicating that the oxide particles coarsen through Ostwald ripening. The growth rate of the oxide particles follows the fifth-power law, which is in the region of dislocation 'pipe' diffusion. The activation energy for pipe diffusion, however, was remarkably high, derived as 891 KJ/mole. The stability of oxide particles and the difference of the diffusion velocity in between bcc-delta phase and fcc-gamma phase should be considered as the contributions to the activation energy. |
| Rights: | https://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article |
| URI: | http://hdl.handle.net/2115/64564 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 大野 直子
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