The global increase in air travel will require commercial vehicles to be more efficient than ever before. Advanced turbine hot section materials are a key technology required to keep fuel consumption and emission to a minimum. Ceramic matrix composites (CMCs) are the most promising material to revolutionize turbine hot section materials because of their excellent high‐temperature properties. Rapid surface recession due to volatilization by water vapor is the Achilles heel of CMCs. Environmental barrier coatings (EBCs), which protect CMCs from water vapor, is an enabling technology for CMCs. The first CMC component entered into service in 2016 in a commercial engine, and more CMC components are scheduled to follow within the next few years. One of the most difficult challenges to CMC components is EBC durability because failure of EBC leads to a rapid reduction in CMC component life. Novel EBC chemistries, creative EBC designs, and robust processes are required to meet EBC durability challenges. Engine-relevant testing, characterization, and lifting methods need to be developed to improve EBC reliability. The aim of this Special Issue is to present recent advances in EBC technology to address current EBC challenges.

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特刊：环保涂料

全球航空旅行的增长将要求商用车辆比以往任何时候都更有效率。先进的涡轮机热段材料是将燃油消耗和排放量降至最低所需的关键技术。陶瓷基复合材料（CMC）由于其出色的高温性能，是最有希望改变涡轮热段材料的材料。由于水蒸气的挥发而导致的快速表面退缩是CMC的致命弱点。保护CMC免受水蒸气影响的环境屏障涂料（EBC）是CMC的一项启用技术。第一个CMC组件于2016年在商用引擎中投入使用，并且计划在未来几年内推出更多CMC组件。CMC组件最困难的挑战之一是EBC的耐用性，因为EBC的故障会导致CMC组件寿命的迅速减少。需要新颖的EBC化学成分，新颖的EBC设计和强大的工艺来应对EBC耐久性挑战。需要开发与发动机相关的测试，特性和举升方法，以提高EBC的可靠性。本期特刊旨在介绍EBC技术的最新进展，以应对当前的EBC挑战。