Production of Submicron Spherical Ceramic Particles

高纯度、亚微米、球形、高表面积颗粒 共价陶瓷是实现高密度的关键 材料，其表现出高强度和抗蠕变性， 高温 现有共价陶瓷 颗粒，导致高温强度差和蠕变 阻力 这个程序将研究一个简单的过程 这将产生化学计量高纯度，亚微米， 具有非常高表面积的球形陶瓷颗粒 这将允许共价键合的 陶瓷. 颗粒合成方法包括： 将高纯度硅蒸发成氮等离子体，或者 甲烷以产生Si3N4或SiC颗粒。 的性质 将评估烧结的陶瓷。 预期在2000年生产的烧结颗粒在2000年生产。 大量节省，将取代现有的材料， 扩大汽车、航空航天、所有发动机的市场 转换、磨损和切削工具。

High purity, submicron, spherical, high surface area particles of covalent ceramics are key to achieving high density materials, which exhibit high strength and creep resistance at high temperatures. Currently available covalent ceramic particles, lead to poor high temperature strength and creep resistance. This program will investigate a simple process that will produce stoichiometric high purity, submicron, spherical ceramic particles with a very high surface area which will allow for self sintering of covalently bonded ceramics. The particle synthesis process consists in evaporating high purity silicon into a plasma of nitrogen or methane to produce Si3N4 or SiC particles. The properties of the sintered ceramic will be assessed. It is expected that the sintered particles, produced at substantial savings, will replace existing materials and expand the market in automotive, aerospace, all engines conversion, wear and cutting tools.