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Some recent trends in research and technology of advanced thermal barrier coatings

机译:先进热障涂层研究和技术的一些最新趋势

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摘要

Ceramic thermal barrier coatings (TBCs) offer the potential to significantly improve efficiencies of aero engines as well as stationary gas turbines for power generation. On internally cooled turbine parts temperature gradients of the order of 100 to 150℃ can be achieved. Today, state-of-the-art TBCs, typically consisting of an yttria-stabilised zirconia top coat and a metallic bond coat deposited onto a superalloy substrate, are mainly used to extend lifetime. Further efficiency improvements require TBCs being an integral part of the component which, in turn, requires reliable and predictable TBC performance. Presently, TBCs produced by electron beam physical vapour deposition are favoured for high performance applications. The paper highlights critical R&D needs for advanced TBC systems with a special focus on reduced thermal conductivity and life prediction needs.
机译:陶瓷隔热涂层(TBC)提供了显着提高航空发动机以及固定式燃气轮机发电效率的潜力。在内部冷却的涡轮机部件上,可以实现100至150℃的温度梯度。如今,最先进的TBC主要用于延长使用寿命,这些TBC通常由氧化钇稳定的氧化锆面漆和沉积在超合金基体上的金属粘结层组成。为了进一步提高效率,需要将TBC作为组件的组成部分,进而需要可靠且可预测的TBC性能。当前,通过电子束物理气相沉积产生的TBC对于高性能应用是有利的。本文重点介绍了先进TBC系统的关键R&D需求,重点是降低导热系数和寿命预测需求。

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