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

这个小企业创新研究（SBIR）第一阶段项目将探索优于金属合金的耐高温陶瓷材料。一种低成本、连续加工的-碳化硅（SiC）纤维增强陶瓷基复合材料（CMC）将被开发。该陶瓷基体由聚碳硅烷转化为聚乙烯-碳硅烷，由前驱体在紫外线照射下交联，在惰性气氛中热解和烧结而成。高纯度，致密，亚微米晶体SiC CMC有望具有可重复的Si-C化学计量学，具有低制造资本成本，在高温（约1400摄氏度）下具有优异的生命周期和物理性能。由于聚合物前驱体是非常流动的，传统的塑料技术可以用来生产大型部件。商业应用广泛，包括汽车和喷气发动机，排气偏转板，辐射燃烧器，热气体过滤器，热交换器和涡轮燃烧衬垫的氧化和防水硬件组件。

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.