Calcium stabilized nitrogen rich sialon ceramics having a general formula of Ca_xSi_12-2xAl_2xN₁₆ with x value (x is the solubility of cation Ca in α-sialon structure) in the range of 0.2–2.2 for compositions lying along the Si₃N₄:1/2Ca₃N₂:3AlN line were synthesized using nano/submicron size starting powder precursors and spark plasma sintering (SPS) technique. The development of calcium stabilized nitrogen rich sialon ceramics at a significantly low sintering temperature of 1500 °C (typically reported a temperature of 1700 °C or greater) remains to be the highlight of the present study. The SPS processed sialons were characterized for their microstructure, phase and compositional analysis, and physical and mechanical properties. Furthermore, a correlation was developed between the lattice parameters and the content (x) of the alkaline metal cation in the α-sialon phase. Well-densified single-phase nitrogen rich α-sialon ceramics were achieved in the range of 0.53(3) ⩽ x ⩽ 1.27(3). A nitrogen rich α-sialon sample possessing a maximum hardness of 22.4 GPa and fracture toughness of 6.1 MPa·m^1/2 was developed.

钙稳定的富氮赛隆陶瓷，其通式为Ca _x Si _{12-2 x} Al _{2 x} N _16，且x值（x是阳离子Ca在α-sialon结构中的溶解度）在0.2至2.2范围内沿着Si ₃ N ₄：1 / 2Ca ₃ N ₂：3AlN线是使用纳米/亚微米尺寸的起始粉末前驱体和火花等离子体烧结（SPS）技术合成的。在极低的1500°C的烧结温度下（通常报道的温度为1700°C或更高），钙稳定的富氮sialon陶瓷的开发仍然是本研究的重点。经SPS处理的sialon具有微观结构，相和组成分析以及物理和机械性能的特点。此外，在晶格参数与α-赛隆相中碱金属阳离子的含量（x）之间建立了相关性。在0.53（3）x范围内获得了致密的单相富氮α-赛隆陶瓷⩽1.27（3）。开发出最大硬度为22.4 GPa，断裂韧性为6.1 MPa·m ^1/2的富氮α-赛隆样品。