Study of possibility of obtaining micro - and nanopowder of nitride composition TiN-BN in titanium halide - sodium azide - boron halide system by SHS azide technology

Synthesis of powders of nitrides and compositions on their basis in micro - and nanoscale condition and high quality today is an important task. Azide technology of self-propagating high-temperature synthesis (SHS-Az) allows to obtain a composite powder having the desired properties, all in one stage, without the blending operation separately obtained powders of nitrides. The use of complex halide salt of an element to be nitrided allows to obtain a final product in the form of micro - and nano-sized powder of a nitride of the element. Studies found that nitride composition based on TiN and BN can be formed in systems consisting of sodium azide, titanium halide and boron halide. Studies on the morphology and particle size of the final product synthesized at different ratio of components in the studied systems suggests that the final product is a nano - and microstructured powder consisting of individual granules (agglomerates) of titanium nitride TiN and boron nitride BN, and small quantities of by-products - boride titanium TiB and hexafluoride of sodium Nа 3TiF 6.