Self-Propagating High-Temperature Synthesis and Sintering of AlN–Y2O3–Al2O3 Composites

Results of studies on the synthesis by the SHS method of aluminum nitride and AlN–Al2O3–Y2O3 composites with a low oxygen impurity content are presented. The dependence of the lattice constant c of aluminum nitride on the oxygen impurity content is shown. The conditions for the synthesis of AlN–Y2O3 composites with a low oxygen content in the aluminum nitride structure are determined. The oxide phase composition in the composites is shown to depend on the yttrium oxide content in the reaction mixture. The optimal content of yttrium oxide in the composites is determined. Results of sintering AlN–Al2O3–Y2O3 composite powders with different oxygen contents in the AlN structure are shown.