Nucleation of the Plasticity at Nanodeformation of the Y3Al5O12 Yttrium-Aluminum Garnet
| Autor: | V. A. Belous, Sergey Dub, G. N. Tolmacheva, O.Ts. Sidletskiy, R. P. Yavetskiy, E. F. Dolzhenkova |
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| Rok vydání: | 2018 |
| Předmět: |
010302 applied physics
Materials science Annealing (metallurgy) Nucleation chemistry.chemical_element 02 engineering and technology Yttrium Nanoindentation Plasticity 021001 nanoscience & nanotechnology 01 natural sciences Grain size Inorganic Chemistry chemistry 0103 physical sciences General Materials Science Crystallite Composite material 0210 nano-technology Single crystal |
| Zdroj: | Journal of Superhard Materials. 40:75-81 |
| ISSN: | 1934-9408 1063-4576 |
| Popis: | The nanoindentation in the continuous stiffness measurement (CSM) mode was used to study the nucleation of the plasticity at the nanodeformation of the yttrium-aluminium garnet (YAG) having a low ((111) YAG single crystal after the annealing at the temperature of 1300°C) and a high (polycrystalline yttrium-aluminium garnet with a grain size of ~ 20 μm after the mechanical polishing) density of dislocations. For a sample having a high dislocations density a smooth elastoplastic transition was observed in the nanocontact as a result of the motion and multiplication of dislocations that are already present in the sample. For (111) YAG single crystal after annealing at the temperature of 1300°C an abrupt elastoplastic transition (pop-in) caused by a homogeneous nucleation of dislocations in the region under the contact was observed. |
| Databáze: | OpenAIRE |
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