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

9531219威瑟斯这个小型企业创新研究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，在纤维之间没有团聚或桥接。以前利用CVD生产具有所需机械性能的纤维的尝试，没有在没有这些问题的情况下成功地在石墨衬底上生产出碳化硅纤维丝束。第一阶段展示了石墨纤维丝束基材的铺展，没有结块或桥联，但保持了高温强度，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、无故障的操作和对工艺变量的透彻了解。预计将有数磅数量的碳化硅纤维丝束，并将用于生产工艺的经济评估。预计将在用于能源转换的复合材料中获得商业应用，例如热交换器、热气体过滤器、多孔式和管式辐射燃烧器、重整器垃圾焚烧、聚变反应堆部件、燃气轮机和内燃机部件、航空航天结构、各种国防系统部件以及体育器材。

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.