The mitigation of CMAS (calcium–magnesium–aluminum–silicon oxide) infiltration is a major requirement for the stability of thermal barrier coatings. In this study, yttria-stabilized zirconia (YSZ)–Al2O3–SiC, YSZ–Al2O3–Ta2O5, and YSZ–Al2O3–Nb2O5 self-healing composites produced by uniaxially pressing powders were investigated as an alternative to YSZ. CMAS infiltration in these materials was tested at 1250 °C for 10 h. Comparing the depth of CMAS infiltration using scanning electron microscope (SEM) in tandem with electron-dispersive X-ray spectroscopy (EDS), all self-healing materials were found to perform better than the reference materials. While standard YSZ shows massive CMAS infiltration, SEM micrographs and EDS maps revealed a 33-fold improvement in CMAS resistance for the YSZ–Al2O3–Nb2O5 system, which exhibited the best performance among the selected self-repairing materials. X-ray diffraction and high-resolution SEM micrographs taken 10 μm below the surface revealed that CMAS only infiltrated pores in the topmost region of the samples. Both YSZ–Al2O3–Ta2O5 and YSZ–Al2O3–Nb2O5 systems showed no signs of chemical reaction with CMAS.

缓解CMAS（钙-镁-铝-硅氧化物）的渗透是热障涂层稳定性的主要要求。在这项研究中，氧化钇稳定的氧化锆（YSZ）–Al 2 O 3 –SiC，YSZ–Al 2 O 3 –Ta 2 O 5和YSZ–Al 2 O 3 –Nb 2 O 5研究了通过单轴压制粉末生产的自修复复合材料，以替代YSZ。在1250°C下测试了这些材料中CMAS的渗透力10小时。将扫描电子显微镜（SEM）与电子分散X射线光谱仪（EDS）串联使用，比较CMAS渗透的深度，发现所有自愈材料的性能均优于参考材料。尽管标准YSZ表现出大量CMAS渗透，但SEM显微照片和EDS图显示YSZ-Al 2 O 3 -Nb 2 O 5的CMAS抵抗力提高了33倍系统，在所选的自修复材料中表现出最佳性能。在表面以下10μm处进行的X射线衍射和高分辨率SEM显微照片显示，CMAS仅渗透到样品最顶部区域的孔中。YSZ-Al 2 O 3 -Ta 2 O 5和YSZ-Al 2 O 3 -Nb 2 O 5体系均未显示与CMAS发生化学反应的迹象。