Ceramic composite materials based on the MAX phase Ti3SiC2 obtained by SHS extrusion

Abstract

Compact cylindrical rods 220 mm long and 4 mm in diameter, consisting of a ceramic composite material based on the MAX phase Ti3SiC2, strengthened by TiC and TiB2 particles, were obtained during the combustion of the initial components (titanium, silicon, soot and boron) in the SHS mode followed by high-temperature deformation. These conditions were implemented in the SHS extrusion method. The influence of the initial composition on the structure, phase composition and mechanical characteristics (nanohardness, elastic modulus, bending strength) of the resulting materials has been established. It has been established that the formation of the Ti3SiC2 MAX phase occurs at the boundary with the TiC phase due to the diffusion of silicon under the influence of high temperatures (up to 1980‒2125 °C) accompanying the SHS extrusion process.