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

9861272 该小型企业创新研究（SBIR）第一阶段项目将探索上级金属合金的坚韧高温陶瓷材料。 将开发一种低成本、连续加工的β-碳化硅（SiC）纤维增强陶瓷基复合材料（CMC）。 陶瓷基质，从聚碳硅烷转化成聚乙烯碳硅烷，结果时，前体是通过暴露于紫外线（UV）照射交联，在惰性气氛中热解和烧结。 预期具有Si-C化学计量的高纯度、致密、亚微米晶体SiC CMC是可再现的，具有低制造资本成本，以及在升高的温度（约1400摄氏度）下优异的寿命周期和物理性质。 由于聚合物前体的流动性很强，因此可以使用传统的塑料技术来生产大型部件。 商业应用广泛，包括用于汽车和喷气发动机的抗氧化和防水硬件组件、排气偏转器、辐射燃烧器、热气体过滤器、热交换器和涡轮机燃烧衬套。

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.