ABSTRACT

Thermal barrier coatings permit gas turbine engines to function at elevated service temperatures with higher efficiency and protect the base metal from deterioration. The desirable properties of TBCs are low thermal conductivity, favourable microstructural characteristics, and optimum sintering behaviour. The purpose of this review/perspective article is to highlight the TBC requirement, two important processing techniques and their future prospects. Alternate use of nanostructured coatings may yield superior advantages. A superlattice nanolayer scheme which is structurally gradient is introduced (with intervening superplastic layers) and can reduce spallation damage.

摘要

热障涂层使燃气涡轮发动机能够在更高的工作温度下以更高的效率运行，并保护基础金属免受劣化。TBC 的理想特性是低热导率、良好的微观结构特征和最佳烧结行为。这篇评论/观点文章的目的是强调 TBC 要求、两种重要的加工技术及其未来前景。交替使用纳米结构涂层可能会产生优越的优势。引入了结构梯度的超晶格纳米层方案（具有介入超塑性层）并且可以减少散裂损伤。