Ceramic thermal barrier coatings (TBCs) have attracted significant research attention owing to their utility in the thermally insulating alloy components of gas turbines and aircraft engines that operate at high temperatures. Most TBCs comprise yttria-stabilized zirconia (YSZ); however, YSZ no longer meets the demands of modern TBC applications due to its low working temperature and high thermal conductivity. It is therefore imperative to develop a ferroelastic ceramic to replace YSZ in TBC applications. Ferroelastic rare-earth tantalates (RETaO) possess many desirable properties, such as ferroelastic toughening, low thermal conductivity, high thermal expansion coefficients, and excellent comprehensive mechanical properties, and thus, they are promising next-generation TBCs, which are expected to operate at ultra-high temperatures (≥1600 °C). This review summarizes the thermophysical properties, CaO-MgO-AlO-SiO (CMAS) corrosion resistance, coatings, and shortcomings of three types of tantalate ceramics (RETaO, RETaO, and RETaO) and outlines the direction of future work in this field.

中文翻译：

---

用于下一代热障涂层的稀土钽酸盐

陶瓷热障涂层（TBC）因其在高温运行的燃气轮机和飞机发动机的隔热合金部件中的应用而引起了广泛的研究关注。大多数 TBC 包含氧化钇稳定氧化锆 (YSZ)；然而，由于其工作温度低、导热系数高，YSZ 不再满足现代 TBC 应用的需求。因此，开发一种铁弹性陶瓷来替代 TBC 应用中的 YSZ 势在必行。铁弹性稀土钽酸盐（RETaO）具有许多理想的性能，如铁弹性增韧、低导热率、高热膨胀系数和优异的综合机械性能，因此，它们是有前途的下一代热障涂层，预计其工作温度超高温（≥1600°C）。本综述总结了三种钽酸盐陶瓷（RETaO、RETaO 和 RETaO）的热物理性质、CaO-MgO-Al2O-SiO (CMAS) 耐腐蚀性、涂层和缺点，并概述了该领域未来的工作方向。