Inelastic behavior of ceramics with hierarchical pore structure under compression
| Autor: | N. L. Savchenko, S. N. Kul'kov, S. P. Buyakova, M. V. Grigor’ev |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Physics and Astronomy (miscellaneous) Compaction Sintering 02 engineering and technology 021001 nanoscience & nanotechnology Compression (physics) 01 natural sciences Macroscopic scale visual_art 0103 physical sciences visual_art.visual_art_medium Ceramic Composite material Deformation (engineering) 0210 nano-technology Porosity Microscale chemistry |
| Zdroj: | Technical Physics Letters. 43:723-726 |
| ISSN: | 1090-6533 1063-7850 |
| DOI: | 10.1134/s1063785017080089 |
| Popis: | The compaction behavior is studied in Al2O3 ceramics with a pore space volume in the range from 35 to 60% and with the following three types of hierarchical pore structure: coarse porosity with a size of 80 to 100 μm, fine porosity with a size of 14 to 15 μm, and intermediate interblock porosity comprised of elongated (110–120 μm) porous microchannels formed as a result of zonal isolation during sintering. It is shown that the obtained hierarchical porous structure causes the formation of a hierarchical deformation structure in the volume of ceramics and leads to a decrease in the extent of destruction processes from the macroscopic scale in the case of unimodal ceramics to the microscale destruction comparable with the sizes of the blocks formed during sintering. |
| Databáze: | OpenAIRE |
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