Кинетика самозалечивания двойных композитов ZrB2-TaB2-SiC
| Parent link: | Перспективы развития фундаментальных наук=Prospects of Fundamental Sciences Development: сборник научных трудов XIX Международной конференции студентов, аспирантов и молодых ученых, г. Томск, 26-29 апреля 2022 г./ Национальный исследовательский Томский политехнический университет (ТПУ) ; под ред. И. А. Курзиной, Г. А. Вороновой.— , 2022 Т. 2 : Химия.— 2022.— [C. 266-268] |
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| Summary: | Заглавие с экрана The work is devoted to the study of the self-healing kinetics of ceramic materials of the ZrB2-TaB2-SiC system, which has a dual composite structure, of the "composite in composite" type, where the matrix is represented by ZrB2-SiC, and the inclusions by TaB2-SiC. The studied ceramics were obtained by hot pressing with different ratios of the matrix and inclusions from 90/10 to 50/50. Sample with a homogeneous distribution of components served as a control. Surface defects were formed mechanically using blades and diamond pastes. The kinetics of self-healing was studied by heating in air at a temperature range from 1000 to 1500 °C. It is shown that all samples show a stable tendency to self-healing due to the decomposition of ionic-covalent compounds and the filling of defects with oxides with a large specific volume. X-ray phase analysis indicates the formation of borosilicate glass and zirconium oxide on the surface. A double composite with an 80/20 matrix-toinclusion ratio showed the highest self-healing rate at 1400°C. |
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2022
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| Online Access: | http://earchive.tpu.ru/handle/11683/72960 |
| Format: | Electronic Book Chapter |
| KOHA link: | https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=634754 |