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Nitride formation during SHS combustion of a micron-size titanium powder and its mixtures with additives in air was studied. It was shown that the yield of TiN Ti powder was higher for SHS combustion in air than for SHS combustion of powders of the same degree of dispersion in nitrogen. The mechanism of formation of TiN is probably determined by the reaction of the intermediate product TiO with atmospheric nitrogen.

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Theoretical bases are presented for preparing ceramic powders based on titanium and aluminum nitrides. The basic advantages are formulated for self-propagating high-temperature synthesis of metal nitride powders in air compared with known preparation methods. The main results are summarized and presented for preparing titanium nitride powder with combustion in air of cylindrical and conical specimens of commercial titanium powder. The effect of specimen shape and weight on combustion rate and the final phase composition of the powders obtained is considered. The possibility is demonstrated of preparing titanium nitride with combustion of coarsely dispersed titanium powder in air.

Mechanisms for titanium nitride formation during burning in air of a mixture of coarse titanium powder and its dioxide with addition of aluminum powder, and formation of the phase composition of ceramic materials prepared by sintering combustion products in a hydrogen atmosphere, are considered. Material of the composition titanium nitride -corundum is prepared.