INFLUENCE OF PRECURSORS STOICHIOMETRY ON SHS SYNTHESIS OF Ti_3AlC_2 POWDERS

摘要

Group of very interesting ternary compounds called MAX-phases can be found in the Ti-Al-C system. These nanolaminate materials, such as Ti_2AlC and Ti_3AlC_2, are characterised by heterodesmic layer structure consisting of covalent and metallic chemical bonds. It results with semi-ductile features locating them on the boundary between metals and ceramics. Thanks to these features they can find wide range of potential applications, for example as a part of ceramic armour. One of the most effective and efficient methods of obtaining these materials is Self-propagating High-temperature Synthesis (SHS), basing on exothermal effect of chemical reaction.The main objective of this work was to apply SHS method to obtain fine sinterable powders of Ti_3AlC_2 and to examine influence of different stoichiometry of various precursors, particularly intermetallic powders in Ti-Al system on final product of the reaction.