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Polycarbosilane-derived SiC: Processing parameters and material characterization
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DOI：10.1016/j.ceramint.2026.02.001.png)
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Polycarbosilane (PCS)-derived SiC was investigated to assess how PCS composition and processing parameters influence material properties. PCS content was varied from 33% (S1B2) to 78% (S4B1) and peak sinter temperature from 1100°C to 1300°C. A range of properties was obtained: microhardness values from 1050 to 1370 VH, densities from 1.61 to 1.97 g/cm3, β-SiC crystallinity indices of 6 to 50%, crystallite sizes between 1.46 and 2.78 nm, and pore sizes spanning 4 to 300 μm, with an average macropore diameter of 77 μm and a peak differential intrusion pore diameter of 5.5 μm, as well as mesopores in the 3 to 5 nm range. Nitrogen adsorption tests revealed a macropore dominated pore architecture with limited slit like interparticle voids, while CO2 adsorption measurements showed uptake ranging from 1.04 to 1.33 g/cm3, suggesting potential applications in CO2 capture and storage for greenhouse gas mitigation. These results guide subsequent optimization of PCS–Butanediol diacrylate(BDDA) preceramic feedstock in its conversion to SiC.
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