SBIR Phase II: Advanced Manufacturing Processing to Produce Economical Chemical Vapor Deposition SiC Fiber Tow

小行星9531219 该小型企业创新研究（SBIR）第二阶段项目将开发一种生产化学气相沉积（CVD）碳化硅（SiC）纤维丝束的方法，纤维之间无团聚或桥接。 先前利用CVD的尝试（其产生具有必要机械性能的纤维）没有成功地在石墨基底上生产SiC纤维丝束而没有这些问题。 第一阶段展示了石墨纤维丝束基材的铺展，没有团聚或桥接，但保留了高温强度，并且预计成本比当前成本低一个数量级。 第二阶段将侧重于连续、无故障运行和对工艺变量的全面了解。 预计将有多磅数量的SiC纤维丝束，并将用于生产工艺的经济评估。 预期在用于能量、转换的复合材料中的商业应用，例如，热交换器、热气过滤器、多孔和管状辐射燃烧器、重整器废物焚烧、聚变反应堆组件、燃气涡轮机和内燃机组件、航空航天结构、各种防御系统组件和运动设备。

9531219 Withers This Small Business Innovation Research (SBIR) Phase II project will develop a method for production of chemical vapor deposition (CVD) silicon carbide (SiC) fibers tow, free of agglomeration or bridging between fibers. Previous attempts to utilize CVD, which yields fibers with the requisite mechanical properties, have not successfully produced SiC fiber tow on graphite substrates without these problems. Phase I demonstrated spreading of the graphite fiber tow substrate without agglomeration or bridging but with retention of high-temperature strength and at a projected cost one order of magnitude less than current cost. Phase II will focus on continuous, trouble-free operation and a thorough understanding of processing variables. Multiple-pound quantities of SiC fiber tow are expected and will be used in economic evaluation of the production process. Commercial applications are expected in composites for energy, conversion, e.g., heat exchangers, hot gas filters, porous and tubular radiant burners, reformers waste incineration, in fusion reactor components, in gas turbine and internal combustion engine components, in aerospace structures, in various defense system components, and in sports equipment.