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Fabrication and Properties of 3‐D Cf/SiCZrC Composites, Using ZrC Precursor and Polycarbosilane

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Abstract:

Three‐dimensional (3‐D) needled Cf/ZrCSiC composites were successfully fabricated by polymer infiltration and pyrolysis combined with ZrC precursor impregnation. The microstructure and mechanical properties of the composites were studied using XRD, SEM and three‐point bending test. The composite with PyC interphase between fiber and matrix had a bulk density of 2.20 g/cm3, an open porosity of 13%, and a bending force of 356 N, and exhibited a nonbrittle failure behavior due to propagation and deflection of cracks, and fracture and pullout of fibers. The mass lose and linear recession rate of the 3‐D needled Cf/SiCZrC composite during oxy‐propane torch test were 0.010 g/s and 0.001 mm/s, respectively. The formation of ZrSiO4 melt on the surface of the composite contributed mainly the excellent high‐temperature property.

Document Type: Research Article

DOI: https://doi.org/10.1111/j.1551-2916.2012.05116.x

Publication date: 2012-04-01

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