ABSTRACT

SiC-reinforced SiC ceramic matrix composites (SiC/SiC CMCs) are considered promising candidates to replace their super alloy counterparts due to higher temperature capabilities and lower densities. However, high-temperature and high-pressure water vapour sourced from the hydrocarbons’ combustion reactions inhibit the potential of SiC/SiC CMCs by leading to rapid surface recession. In order to address this challenge, environmental barrier coatings (EBCs) have been developed. The emphasis of this review is on the materials and processing techniques for the development of EBC systems. In the first part of the review, the characteristics of the SiC/SiC CMCs and the most common EBC materials are summarised. Then, the interrelationship between processing methods, microstructures and the resulting properties is reviewed. Finally, an overview of the future directions is outlined to assist developments in advanced and novel EBCs for next generation gas turbines.

摘要

SiC 增强 SiC 陶瓷基复合材料 (SiC/SiC CMC) 由于具有更高的温度能力和更低的密度，被认为是替代超级合金材料的有希望的候选材料。然而，来自碳氢化合物燃烧反应的高温高压水蒸气会导致快速的表面衰退，从而抑制 SiC/SiC CMC 的潜力。为了应对这一挑战，已经开发了环境阻隔涂层（EBC）。本综述的重点是用于开发 EBC 系统的材料和加工技术。在综述的第一部分，总结了 SiC/SiC CMC 和最常见的 EBC 材料的特性。然后，回顾了加工方法、微观结构和所得性能之间的相互关系。最后，