Effect of a LZSA Glass Infiltration on the Properties of a Porous Ceramic Composite Material Derived from Polysiloxane/Al/Nb
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.
Lucio Salgado and Francisco Ambrozio Filho
W. Acchar et al., "Effect of a LZSA Glass Infiltration on the Properties of a Porous Ceramic Composite Material Derived from Polysiloxane/Al/Nb", Materials Science Forum, Vols. 591-593, pp. 409-414, 2008