Response of nanoclusters to heavy-ion irradiation in an Fe-12Cr ODS steel
| Autor: | S.Z. Diao, Q. Zhan, S.L. Wang, Shigeharu Ukai, Qizong Liu, Yun Zhang, Somei Ohnuki, Naoko Oono, H.Q. Yu, P.P. Liu, Farong Wan |
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| Rok vydání: | 2021 |
| Předmět: |
Ostwald ripening
Materials science Precipitation (chemistry) Mechanical Engineering Nanoparticle Microstructure Nanoclusters symbols.namesake Nuclear Energy and Engineering Chemical engineering Transmission electron microscopy symbols General Materials Science Irradiation Dispersion (chemistry) Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. 172:112759 |
| ISSN: | 0920-3796 |
| Popis: | Oxide dispersion-strengthened (ODS) steel is one of the most prominent candidates as the fuel cladding or blanket component in advanced nuclear reactors. The stability and evolution of high-density nanoscale particles in ODS steels during irradiation are of considerable importance in influencing the mechanical properties and irradiation resistance. The microstructure, especially high-density nanoparticles in 12Cr-ODS steel, was investigated in the present study after 1.6 MeV Fe13+ ions irradiation at 450 °C. Atomic probe tomography (APT) and transmission electron microscopy (TEM) were used to track the evolution of microstructure at an atomic scale. Results demonstrate the uniform dispersion of numerous Y-Ti-O nanoclusters in the matrix. The average diameter and Y:Ti ratio of the clusters increased after irradiation. The interface-favorable precipitation of irradiation-induced nanosized α′ phase was especially demonstrated. Radiation-enhanced diffusion (RED) combined with Oswald ripening were considered to illustrate the evolution of Y-Ti-O nanoclusters during irradiation. The segregation behavior of α′ was discussed on the basis of the RED accelerated kinetics and thermodynamic. |
| Databáze: | OpenAIRE |
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