The paper presents experimental results of high-temperature synthesis of cast nitride materials in the V–Ti–N system. For the first time, cast materials based on solid nitride and intermetallic solutions of the V–Ti–N system have been obtained by self-propagating high-temperature synthesis in the combustion mode from a powder mixture of VO + Al + AlN + Ti. The syntheses were carried out in a 3 L reactor at a nitrogen pressure of 5 MPa. The initial mixtures were placed in quartz crucibles. When burning mixtures with a titanium content of α = 0–7.5%, the final products melt, and they are completely separated (separated) into the oxide (upper ingot) and “metallic” (lower ingot) parts. upon combustion of the initial (base) mixture, which does not contain titanium (α = 0), cast materials consisting of vanadium nitride VN are synthesized. The introduction of titanium into this mixture leads to a significant change in the composition and microstructure of the final products. Titanium introduced into the initial mixture is dissolved in vanadium nitride to form solid solutions in VN. In addition, titanium participates in the redox reaction with vanadium oxide to form oxides that pass into the oxide (upper) ingot. The resulting end products were characterized by X-ray diffraction and electron microscopy. Their structural and phase components have been studied.
Gorshkov et al. (Wed,) studied this question.