The Direct Synthesis of SiAlON Powder in a Plasma Reactor

氮氧化硅铝，通常称为SiAlON，是一种 工业陶瓷用于切削工具，模具，化工器皿， 用于熔融金属、轴承、枪管和 各种发动机部件，例如燃气涡轮机，柴油机， 等 它具有高韧性、高强度、合理的 硬度和良好的抗氧化性和热冲击 阻力 它是通过它的原位反应产生的， 组分Si3N4、AlN和Al2O3加上烧结助剂。 的 固态反应可能需要数小时才能产生固体 然后将其研磨成粉末。 的 SiAlON的性能和可靠性受 起始材料、它们的粒度和纯度以及 加工温度和时间。 小企业创新第一阶段的目的是 产生高纯度和严格控制的粒度 SiAlON粉末用于高强度的生产 组件，无需原位反应 过程 PI计划开发一个感应耦合 等离子体合成工艺直接生产高纯度的 高纯SiALON粉末。 将进行筛选反应 选择最佳等离子体频率和前驱体， 产品SiALON粉末。 合成过程将是 优化与生产SiAlON粉末巩固为 性能评估和与原位生产的SiAlON的比较。 将开发合成反应的模型， 直接生产SiAlON粉末。

Silicon aluminum oxynitride, commonly called SiAlON, is an industrial ceramic used in cutting tools, dies, chemical ware, containers for molten metals, bearings, gun barrels and a variety of engine components such as gas turbines, diesels, etc. It has high toughness, high strength, reasonable hardness and good oxidation resistance and thermal shock resistance. It is produced through the insitu reaction of its constituents Si3N4, AlN and Al203, plus sintering aids. The solid state reaction can take up to hours to produce a solid block of SiAlON which is then ground into powder. The properties and reliability of the SiAlON are affected by the starting materials, their particle size and purity as well as processing temperature and time. The purpose of this Small Business Innovation Phase I it to produce a high purity and closely controlled particle size SiAlON powder to be used in the production of high strength components, eliminating the need for the insitu reaction process. The PIs plan to develop an inductively coupled plasma synthesis process for the direct production of a high purity SiALON powder. Screening reactions will be performed to select the optimum plasma frequency and precursor to product SiALON powder. The synthesis process will be optimized with the produce SiAlON powder consolidated for property valuation and comparison to insitu produced SiAlON. A model will be developed for the synthesis reaction to directly produce SiAlON powder.