SBIR Phase I: Continuous SiC Matrix Composite Fabrication Using UV Curable Precursors

9861272这个小型企业创新研究第一阶段项目将探索比金属合金更坚韧的高温陶瓷材料。开发一种低成本、连续加工的碳化硅纤维增强陶瓷基复合材料(CMC)。陶瓷基质由聚碳硅烷转化为聚碳硅烷，前驱体在紫外线(UV)照射下交联化，在惰性气氛中热解并烧结得到。高纯度、致密、亚微米晶态的碳化硅CMC具有可重现性、低制造成本以及在高温(约1400摄氏度)下优异的生命周期和物理性能。由于聚合物前驱体具有很强的流动性，传统塑料技术可用于生产大型部件。商业应用广泛，包括汽车和喷气发动机、排气导向器、辐射燃烧器、热气体过滤器、热交换器和涡轮燃烧衬里的氧化和防水硬件部件。

9861272 This Small Business Innovative Research (SBIR) Phase I project will explore tough high-temperature ceramic materials that are superior to metal alloys. A low-cost, continuously processed beta-silicon carbide (SiC) fiber reinforced ceramic matrix composite (CMC) will be developed. The ceramic matrix, derived from polycarbosilane converted into polyethny-carbosilane, results when the precursor is cross-linked by exposure to ultraviolet (UV) irradiation, pyrolyzed in inert atmosphere and sintered. A high purity, dense, sub-micron crystalline SiC CMC is expected with Si-C stoichiometry that is reproducible, has low manufacturing capital costs, and excellent life-cycle and physical properties at elevated temperatures (about 1400 degrees Centigrade). Since the polymer precursor is very fluid, conventional plastics technology can be used to produce large components. Commercial applications are wide and encompass oxidation and water-resistant hardware components for automotive and jet engines, exhaust deflectors, radiant burners, hot gas filters, heat exchangers, and turbine combustion liners.