Influence of the low interfacial density energy on the coarsening resistivity of the nano-oxide particles in Ti-added ODS material
| Autor: | M.-L. Lescoat, Shengyi Zhong, M.H. Mathon, J. Ribis, Y. de Carlan |
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| Rok vydání: | 2013 |
| Předmět: |
Nuclear and High Energy Physics
Materials science Nanostructure Annealing (metallurgy) Oxide Interaction energy Surface energy Crystallography Grain growth chemistry.chemical_compound Computer Science::Emerging Technologies Nuclear Energy and Engineering chemistry Electrical resistivity and conductivity Chemical physics Nano General Materials Science |
| Zdroj: | Journal of Nuclear Materials. 442:S101-S105 |
| ISSN: | 0022-3115 |
| Popis: | The ODS materials are composed of very fine (Y, Ti, O) nano-particles. During annealing at 1573 K, the nano-clusters evolve into a fully cubical shape Y2Ti2O7-type particles. This evolution is caused by the elastic interaction energy at the nano-particle/matrix interface. Indeed, the cube-on-cube orientation relationship of the daughter Y2Ti2O7 phase is likely linked to be a coherent configuration of the parent nano-clusters. The elastic driven morphology allows for an estimate of the interfacial energy of these nano-clusters of σ = 290 mJ m−2. This low interfacial energy value could be part of the explanation of the very high resistivity to coarsening of the (Y, Ti, O) coherent nano-cluster system, which is confirmed by observations of particle coarsening when the nano-size particles lose their coherency after recrystallisation or grain growth. |
| Databáze: | OpenAIRE |
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