SBIR Phase I: Ceramic Matrix Infiltration Process for Net-Shape Reinforcement YAG Preforms to Produce Cost-Effective High Temperature Ceramic Matrix Composites

这个小企业创新研究（SBIR）一期项目将开发一种低成本的高温氧化陶瓷复合材料，用于涡轮叶片，具有1700C的使用温度能力，优异的强度保持，抗蠕变，高断裂韧性和各向同性。量身定制的孔隙结构已被制成具有相互连接的通道，适合与用于高强度复合材料的氧化物基体注入。蓝宝石/氧化铝化学改性陶瓷（CMC）在高温下进行了测试，显示出比多晶氧化铝复合材料更好的三个数量级的抗蠕变性能。这项新技术为陶瓷复合材料提供的解决方案将解决当前纤维基氧化物陶瓷复合材料相关的严重成本/性能问题。通过消除高成本的纤维和预成型步骤，这些氧化物复合材料的成本将比目前最先进的氧化物复合材料低几个数量级。

This Small Business Innovation Research (SBIR) Phase I project will develop a low cost high temperature oxide ceramic composite for turbine blade application, with 1700C service temperature capability, excellent strength retention, creep resistance, high fracture toughness and isotropy. Tailored porosity structures have been fabricated with interconnected passages suitable for infusion with an oxide matrix for high strength composites. Sapphire/alumina chemically modified ceramics (CMC) have been tested at high temperatures and have shown three orders of magnitude better creep resistance than polycrystalline alumina composites. The solutions provided by this new technology for ceramic composites will address the serious cost/performance problems associated with current fiber based oxide ceramic composites. By elimination of high cost fiber and preforming steps, these oxide composites will cost orders of magnitude less than current state of the art oxide composites.