SBIR Phase I: Functionally Graded and Nanostructured Thermal Protection Coatings

该研究的目的是调整静电自组装技术对混合，功能梯度陶瓷纳米复合材料的建设具有独特的组合的耐热性，热绝缘性和阻氧性能，热腐蚀性和耐侵蚀性，疲劳寿命，耐不良涂层/基材相互作用，热膨胀失配效应，粘附能力，和高温机械性能。静电自组装技术为加工各种纳米陶瓷提供了强有力的实用手段（和其他）成分将纳米材料（纳米管、纳米纤维、纳米片和纳米颗粒）烧结成高度致密的纳米层，其在烧结时产生接近完美结构的致密纳米层复合材料，这些涂层具有功能梯度，可满足热障涂层性能各个方面的多方面需求。将测试具有功能梯度纳米结构的组装涂层，以验证静电自组装作为将纳米尺寸组分受控地和彻底地整合成接近完美的功能梯度纳米复合材料的实用方法的优点。实验工作还将验证，自组装纳米复合材料补充了巨大的性能属性与纳米尺寸constituents. Commercialally纳米间隔界面所带来的热机械和屏障质量的收益nanolayeredcomposites. Commercialally，静电自组装提供了重大的经济，环境和能源优势替代涂层技术的近乎完美的结构。新型纳米结构、功能梯度涂层也可以定制，以满足腐蚀防护和耐磨性领域的更广泛要求。具有显著增强的性能属性的热障涂层是迫切需要的，以满足燃气涡轮机、固体火箭喷嘴、再入飞行器和许多其他应用中日益严格的要求。这些应用中的新兴设计通常涉及进一步的温升以提高性能和效率;需要突破性的技术发展来满足未来系统日益严峻的服务环境中对热保护系统的需求。

The research aims to tailor the electrostatic self-assembly technique towards buildup of hybrid, functionally graded ceramic nanocomposites with unique combinations of heat resistance, thermal insulation and oxygen barrier qualities, hot-corrosion and erosion resistance, fatigue life, resistance to adverse coating/substrate interaction, thermal expansion mismatch effects, adhesion capacity, and high-temperature mechanical performance. Electrostatic self-assembly offers powerful and practical means of processing diverse nanosize ceramic (and other) constituents (nanotubes, nanofibers, nanoplatelets and nanoparticles) into highly compact nanolayers which, upon sintering, yield dense nanolayered composites of near-perfect structure, that are functionally graded to meet the multi-faceted demands on various aspects of thermal barrier coating performance The self-assembled coatings with functionally graded nanostructures will be tested in order to validate the merits of electrostatic self-assembly as a practical approach for controlled and thorough integration of nanosize constituents into near-perfect, functionally graded nanocomposites. The experimental effort will also verify that self-assembled nanolayered composites complement the tremendous performance attributes associated with the near-perfect structure of nanosize constituents with the gains in thermomechanical and barrier qualities brought about by nano-spaced interfaces in nanolayered composites.Commercially, electrostatic self-assembly offers major economic, environmental and energy advantages over alternative coating techniques. The new class of nanostructured, functionally graded coatings can also be tailored to meet broader requirements in the fields of corrosion protection and wear resistance. Thermal barrier coatings with substantially enhanced performance attributes are critically needed to meet the increasingly stringent requirements in gas turbines, solid rocket nozzles, reentry vehicles, and many other applications. The emerging designs in these applications generally involve further temperature rise for enhanced performance and efficiency; breakthrough technological developments are needed to meet the demands on thermal protection systems in the increasingly severe service environments of future systems.