COMBUSTION SYNTHESIS OF Ti_3SiC_2-BASED CERAMIC MATRIX COMPOSITES USING NON-POWDER REACT ANT SOLIDS

摘要

A powder-free technique for fabrication of Ti_3SiC_2-based composite ceramics via self-propagating high-temperature synthesis (SHS) is developed. The essence of the method is the SHS-compaction of a multilayer stack comprised alternating layers of titanium foils and polymer films filled with either microsized silicon carbide particles or microsized silicon carbide particles mixed with charcoal particles. It is shown that SHS-compaction of non-powder materials can be used to synthesize dense particulate-reinforced ceramic matrix composites of Ti_3SiC_2-TiSi_2-SiC_p. Effects of the initial reactant composition and the synthesis conditions on the microstructure of the prepared materials are discussed.