【摘要】 热障涂层（TBC）和环境障涂层（EBC）是燃气涡轮发动机的关键技术。La₂Zr₂O₇、YTaO₄等低热导率陶瓷材料展现出相变温度高、热膨胀匹配性好、抗CMAS（CaO-MgO-Al₂O₃-SiO₂）腐蚀性能良好等特性，纳米晶γ’相涂层具有涂层-基体化学/力学相容性优异及体系应力低等优点，是下一代TBC的重要发展方向。基于β-Yb₂Si₂O₇的高熵稀土硅酸盐，具有良好的热膨胀匹配性和抗CMAS腐蚀性能、优异的抗水蒸汽腐蚀性能，以及显著低于YSZ的热导率，是热环境障涂层（TEBC）的重要材料体系。双相陶瓷复合技术，可显著提高断裂韧性，并改善抗CMAS腐蚀性能和隔热性能，是未来研究应重点关注的方向。更多还原

【Abstract】 The thermal barrier coatings（TBC） and environmental barrier coatings（EBC） are essential for advanced gas turbine engines,and their development history is briefly reviewed in this article. In order to champion the enormous challenge from much harsher operating conditions in next generation engines, numerous innovations of coating materials and novel designs of coating microstructures have been investigated. The most potential paths to develop new generation TBC and EBC are now becoming increasingly clear. The best novel TBC system may be based bond coat of nanocrystalline γ’ phase and top coat of low thermal conductivity La₂Zr₂O₇ or YTaO4,because the former is excellent chemically and mechanically compatible to single crystal Ni-base superalloy substrates, and leads to lower thermal stresses, and the latter is structurally stable at much higher temperatures, and has superior resistance against CMAS attack and high CTE similar to YSZ. One of the best ceramic candidates for thermal/environmental barrier coatings is the high-entropy rare earth silicates based on β-Yb₂Si₂O₇, as it is resistant against CMAS and steam corrosion, and has extremely low thermal conductivity and good CTE match with CMC. A further topic of concern is dual-phase ceramics technologies, which are effective in fracture toughness enhancement and capable of improving corrosion resistance and thermal barrier capability.更多还原