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

该小型企业创新研究(SBIR)一期项目将开发一种用于涡轮叶片的低成本高温氧化物陶瓷复合材料，具有1700℃的使用温度能力、出色的强度保持性、抗蠕变性能、高断裂韧性和各向同性。定制的多孔性结构已经被制造成具有相互连接的通道，适合于与高强度复合材料的氧化物基质进行浸渍。蓝宝石/氧化铝化学改性陶瓷(CMC)在高温下进行了测试，其蠕变性能比多晶氧化铝复合材料高三个数量级。这一新技术为陶瓷复合材料提供的解决方案将解决目前纤维基氧化物陶瓷复合材料存在的严重成本/性能问题。通过取消高成本纤维和预成型步骤，这些氧化物复合材料的成本将比当前技术水平的氧化物复合材料低一个数量级。

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.