Starch consolidation of SiC ceramics: processing and low-temperature sintering in an air atmosphere
| Autor: | Gülsüm Topateş, Nigar Özey, Ayse Kalemtas, M. Türkay Aytekin Aydin |
|---|---|
| Přispěvatelé: | Kalemtaş, Ayşe |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Starch Sintering Clay industries. Ceramics. Glass 02 engineering and technology TG-DTA 01 natural sciences tg–dta chemistry.chemical_compound Starch consolidation 0103 physical sciences Highly porous Air atmosphere Low-temperature sintering Ceramic 010302 applied physics low–temperature sintering Consolidation (soil) Borax Metallurgy 021001 nanoscience & nanotechnology Porous SiC TP785-869 chemistry sintering under atmospheric conditions visual_art Ceramics and Composites visual_art.visual_art_medium starch consolidation 0210 nano-technology Corn starch porous sic Sintering under atmospheric conditions |
| Zdroj: | Journal of Asian Ceramic Societies, Vol 8, Iss 1, Pp 106-115 (2020) |
| Popis: | WOS:000506274000001 Highly porous SiC ceramics containing borax decahydrate were produced by a starch consolidation method in which corn starch was used as a shaping and pore-forming additive. Four different compositions were prepared with different SiC:borax decahydrate ratios and corn starch content. Mixtures with a solid ratio of 55 wt.% were cast in non-porous molds and heated at 80 degrees C for shaping. The starch consolidation technique enabled the shaping of SiC ceramics with different forms and sizes. Simultaneous thermogravimetry and differential thermal analysis of the SiC-borax decahydrate mixture showed that melting took place at below 600 degrees C, as a result of which sintering was carried out at the relatively low temperature, of 600 degrees C in the air using borax decahydrate as a sintering additive. Phase analysis showed that oxidation of SiC did not take place, since no cristobalite phase was detected. Density measurement and mercury porosimetry studies showed that highly porous (70-89% porosity) SiC ceramics with pore size values ranging from 14 to 18 mu m were produced. SEM microstructures of each composition revealed that a strong neck had been formed between the SiC particles in spite of the low sintering temperature. Scientific and Technological Research Council of Turkey (TUBITAK)Turkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [114M510] This work was supported by the Scientific and Technological Research Council of Turkey (TUBITAK Project No: 114M510). |
| Databáze: | OpenAIRE |
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