Y2O3 nano-particle formation in ODS ferritic steels by Y and O dual ion-implantation
| Autor: | K. Oka, Shinichiro Yamashita, Soumei Ohnuki, Eiichi Wakai, D Sakuma, L. E. Rehn |
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| Rok vydání: | 2004 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Annealing (metallurgy) Metallurgy technology industry and agriculture Nucleation Oxide Nanoparticle Homogeneous distribution Ion law.invention Condensed Matter::Materials Science chemistry.chemical_compound Ion implantation Nuclear Energy and Engineering Chemical engineering chemistry law General Materials Science Electron microscope |
| Zdroj: | Journal of Nuclear Materials. :392-396 |
| ISSN: | 0022-3115 |
| DOI: | 10.1016/j.jnucmat.2004.04.039 |
| Popis: | For basic understanding of how to produce a homogeneous distribution of nano-scale oxide particles, we have applied dual ion-implantation to make a super-saturation of oxide-forming elements. Y+ and O+ ions were implanted into ferritic alloys at room temperature. Both in situ annealing in an electron microscope for thin samples and conventional annealing for bulk samples were carried out at 300–1300 K. Nano-particles of Y2O3 precipitated during annealing, where the starting temperatures for the nucleation and growth depended on the annealing methods. In thin specimens the growth and nucleation of Y2O3 started at 573 and 613 K. In bulk specimens, the growth and nucleation shifted to higher temperatures. Compared with conventional Mechanical Alloying, it is concluded that dual ion-implantation can produce much finer distributions of nano-scale oxides. In order to explain these results, we emphasize the roles of super-saturated elements and lattice defects. |
| Databáze: | OpenAIRE |
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