Effect of sintering additives on the oxidation behavior of Si3N4 ceramics at 1300°C

Salt-assisted combustion synthesis of silicon nitride with high α-phase content

“…By adding the salts ( Fig. 3a and b), the ␣-Si 3 N 4 content increased to ∼35%-40% as calculated by (1). The amount of unreacted silicon also decreased with the incorporation of the salts because the additives facilitated the nitridation process.…”

“…Increasing attention is being paid to the development of Si 3 N 4 ceramics for structural applications due to their superior mechanical properties at high temperature, good oxidation resistance, and thermal shock behavior at both room and high temperatures [1][2][3]. In recent years, silicon nitride ceramics have been used in structural components of gas turbines, engines, and other structures subjected to high-temperature conditions [4].…”

Hydrothermal Treatment of Si3N4 for the Improvement of Oxidation Resistance at 1400°C

“…Y 2 Si 2 O 7 (Y‐keivyite) and SiO 2 (cristobalite) were formed on the surface of the as‐sintered sample after oxidation at 1400°C. The formation of Y 2 Si 2 O 7 is due to the concentration of Y 3+ ions in the oxide layer 13 . In contrast, only peaks of cristobalite were detected, together with those of β‐Si 3 N 4 on the treated samples after oxidation.…”

Phase Analysis and Study of the Microstructure of Cordierite-Si3N4Composite Synthesis by Nano- and Micro-Sized Silicon Particles

“…Also Si 3 N 4 shows good thermal stress resistance due to the low coefficient of thermal expansion, relatively good resistance to oxidation compared to other high-temperature structural materials and suitable strength to weight ratio for design of engineering components in ceramic industries [11][12][13].…”