By using the active filler controlled polymer pyrolysis, new and cost-effective composite
materials can be obtained. In this work, ceramic matrix composites were prepared by using this
precursor route, using a polysiloxane network filled with metallic niobium and aluminum powders
as active fillers. The mixtures were blended, uniaxially warm pressed, and pyrolyzed in flowing
argon at 1400 °C. Porous ceramic preforms were infiltrated with a LZSA glass material, in order to
improve the density of a porous composite material. The properties of the pyrolyzed composite
material and the effect of the LZSA infiltration on the Al2O3-NbC-SiOC ceramic composite
material were investigated. The results have showed that the infiltration processes has improved the
physical and mechanical properties of the composite material.
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