SBIR Phase II: Silicon Carbide Whisker Reinforced Alumina Coatings on SiC-SiC Composites

* 9531427 Kowbel 该小型企业创新研究第二阶段项目致力于展示碳化硅陶瓷（SiC-SiC复合材料）的独特腐蚀保护。 用作基底的SiC-SiC复合材料含有该公司开发的耐高温蠕变化学气相反应（CVR）SiC纤维。这些纤维有望通过提供高效益成本比，大大增强化学气相渗透（CVI）SiC-SiC复合材料在能源相关市场的市场渗透率。 然而，在高于1200摄氏度的腐蚀性环境中使用这些复合材料需要防腐蚀涂层。 第一阶段生产的氧化铝（SiCw-Al_2 O_3）涂层在这一领域提供了很大的潜力。 第一阶段的成功完成证明了沉积在SiC基底上的致密、粘附、无裂纹、抗热震涂层。 在第二阶段，该技术将扩展到包括SiC-SiC管状衬底，目标是在高达1400摄氏度的温度下实现出色的腐蚀保护。 此外，将努力在SiC衬底上获得高断裂韧性的SiCw-Al 2 O3涂层。 第二阶段工作的成功将确保这项技术在能源相关的切割工具以及其他领域的几个商业应用。 潜在的应用包括热交换器管、燃气涡轮机发动机、先进的航空发动机、热力发动机、过滤器应用和切削工具。 ***

*** 9531427 Kowbel This Small Business Innovation Research Phase II project is devoted to demonstrating the uniqueness of corrosion protection of silicon carbide ceramics (SiC-SiC composites). The SiC-SiC composites used as the substrate contain high temperature creep resistant chemical vapor reaction (CVR) SiC fibers developed by the firm. These fibers are expected to greatly enhanced market penetrations of chemical vapor infiltration (CVI) SiC-SiC composites in energy-related markets by providing high benefit to cost ratios. However, the use of these composites in corrosive environments at temperatures above 1200 degrees C calls for corrosion protection coatings. The alumina (SiCw - A12O3) coatings produced in Phase I offer a great potential in this area. The successful completion of Phase I demonstrated dense, adherent, crack-free, thermal shock resistant coatings deposited on a SiC substrate. In the Phase II this technology will be extended to include SiC-SiC tubular substrates with the goal of achieving excellent corrosion protection at temperatures up to 1400 degrees C. In addition, efforts will be made to obtain high fracture toughness SiCw-Al2O3 coatings on SiC substrates. The success of the Phase II effort will ensure several commercial applications of this technology in energy-related, cutting tools as well as other areas. The potential applications include heat exchanger tubes, gas turbine engines, advanced aircraft engines, heat engine, filter applications and cutting tools. ***