Properties regulation of SiC ceramics prepared via stereolithography combined with reactive melt infiltration techniques
| Autor: | Cui Congcong, Zhang Ge, Shan Li, Bao Jianxun, Gong Wang, Wei Li |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
Process Chemistry and Technology Thermal expansion Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Infiltration (hydrology) chemistry.chemical_compound Thermal conductivity Flexural strength chemistry law visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Silicon carbide Ceramic Composite material Elastic modulus Stereolithography |
| Zdroj: | Ceramics International. 47:33997-34004 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2021.08.307 |
| Popis: | Stereolithography(SLA) combined with reactive melt infiltration (RMI) is an effective way to fabricate silicon carbide(SiC) ceramic components with complex shapes and high precision. The purpose of this paper is to increase the content of SiC in the sintered body and improve the properties of SiC ceramics prepared by SLA/RMI technologies by the impregnation of the precursor of carbon source after debinding. The effects of the concentration of phenolic resin solution on the strength of sintered body were studied. The results show that this method can reduce the coefficient of thermal expansion and improve the thermal conductivity of the final body. At the same time, when the concentration of phenolic resin solution is 40 wt%, the final body obtained the best comprehensive properties. The value of bulk density, flexural strength and elastic modulus were 2.89 g/cm3, 244.17 ± 5.13 MPa and 402.39 GPa, respectively. This strategy provides a promising prospect for the preparation of space optical mirrors with complex shapes and high strength by the SLA/RMI method. |
| Databáze: | OpenAIRE |
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