Fabrication and property evaluation of titanium silicide active filler incorporated ceramic matrix composite

Abstract

Ceramic Matrix Composites (CMCs) are advanced materials used for high tech applications. Polymer Infiltration and Pyrolysis (PIP) route is a versatile route for the fabrication of CMCs, but the inherent volume shrinkage and porosity in the polymer-derived ceramic (PDC) matrix makes the PIP route unattractive. Carbon fibre reinforced silicon boron oxy-carbide (Cf/SiBOC) CMCs were fabricated via the PIP process using titanium silicide (TiSi2) active filler. This study details the effect of TiSi2 and different interphase materials, pyrocarbon (PyC) & boron nitride (BN), on the flexural strength and oxidation resistance properties of Cf/SiBOC CMCs. From the present study, it was concluded that the presence of an active filler and a suitable interphase material is essential for the fabrication of better CMCs in terms of oxidation resistance and flexural strength.