Formation of SiC whiskers/leucite-based ceramic composites from low temperature hardening geopolymer
| Autor: | Song Chen, Shengjian Zhao, Yu Zhou, Peigang He, Hualong Yang, Dechang Jia, Qikun Wang, Xiaoming Duan, Siqi Ma, Wenjiu Duan |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Materials science Process Chemistry and Technology Whiskers Composite number 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Geopolymer Flexural strength Whisker visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Composite material 0210 nano-technology Leucite |
| Zdroj: | Ceramics International. 47:17930-17938 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2021.03.106 |
| Popis: | In this study, SiC whiskers (SCWS) reinforced geopolymer composites (SCWS/KGP) and their ceramic products (SCWS/leucite) were prepared, and effects of SiC whiskers contents on the microstructure and flexural strength of the SCWS/KGP and SCWS/leucite composites were investigated. The results show that the whisker addition has little influence on both phase composition and thermal shrinkage of the KGP composites, but a suitable content of whisker will result in the improved flexural strength, and when the SCWS content is 2 wt%, flexural strength of the SCWS/KGP composite is enhanced by 95% compared with the neat geopolymer. The flexural strength of the composites can be further enhanced significantly after the composites being treated at 1100 °C and 1200 °C and flexural strength of the composite with SCWS content of 2 wt% was 107% and 125% higher than the untreated counterpart, respectively. The increase in flexural strength of the composites should be attributed to the strong leucite formation, whisker debonding and pulling out from matrix during the fracturing process based on the good interfacial bonding state between whisker and leucite matrix. |
| Databáze: | OpenAIRE |
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