Processing of Cf/SiC composites by hot pressing using polymer binders followed by polymer impregnation and pyrolysis
| Autor: | Lingappa Rangaraj, M. Stalin, K. Rajaguru |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
chemistry.chemical_classification Materials science Composite number Sintering 02 engineering and technology Polymer 021001 nanoscience & nanotechnology Hot pressing 01 natural sciences Polysilazane chemistry.chemical_compound chemistry Flexural strength 0103 physical sciences Materials Chemistry Ceramics and Composites Silicon carbide Composite material 0210 nano-technology Pyrolysis |
| Zdroj: | Journal of the European Ceramic Society. 40:290-297 |
| ISSN: | 0955-2219 |
| Popis: | Continuous carbon fiber (Cf) reinforced silicon carbide (SiC) matrix composite (Cf/SiC) was processed through hot pressing (HP) using polycarbosilane (PCS) in matrix and polysilazane in interphase regions as polymer binders. HP experiments were conducted at 4 MPa, 1200 °C and 1 h; followed by PCS polymer impregnation and pyrolysis (PIP) at 1200 °C under vacuum. The BN/SiC-Si3N4 interphase formed on the Cf cloth during BN dispersed polysilazane polymer coating and pyrolysis. The influence of PCS quantity during HP experiments on Cf/SiC composites was studied. Results suggest that sintering of SiC matrix in Cf/SiC composite improves by increasing PCS content during HP; however, high PCS content increases the liquidity of SiC-PCS mixture to flow out of the composite structure. The Cf/SiC composites with relative density ranging from 79 to 83% and flexural strength from 67 to 138 MPa was achieved. |
| Databáze: | OpenAIRE |
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