Deformation and fracture of alumina ceramics with hierarchical porosity
| Parent link: | Journal of Silicate Based and Composite Materials Vol. 70, No. 1.— 2018.— [P. 18-22] |
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| Korporativní autor: | |
| Další autoři: | , , , , , , , |
| Shrnutí: | Title screen The compression behavior of Al2O3 ceramics with a hierarchical pore structure was studied. The hierarchical pore structure included the pores of three types: coarse porosity with a size of 80 to 100 μm, fine porosity with a size of 14 to 15 [mu]m, and intermediate interblock porosity comprised of elongated (110-120 [mu]m) 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. At fixed values of the pore space, the studied ceramics with hierarchical pore structure shows a noticeably higher compressive strength as compared to the ceramics with a unimodal porosity. |
| Vydáno: |
2018
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| Témata: | |
| On-line přístup: | http://epitoanyag.org.hu/static/upload/10.14382_epitoanyag-jsbcm.2018.4.pdf |
| Médium: | Elektronický zdroj Kapitola |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=665828 |