In this study, corrosion behavior of Yb₂O₃-Y₂O₃ co-stabilized ZrO₂ (YbYSZ) was systematically investigated under CMAS melt attack. The result was found that YbYSZ exhibited a better CMAS resistance than yttria stabilized zirconia (YSZ), which was attributed to the excellent phase stability. The degradation of grain caused by CMAS attack was greatly related to the diffusion rate of element substantially. Yb³⁺ exhibited a low diffusion rate contributing to good phase stability during corrosion. A corresponding first-principles calculation further confirmed this conclusion. Besides, YbYSZ showed a higher thermal expansion coefficient and lower thermal conductivity as compared with YSZ counterpart.

在这项研究中，系统地研究了在CMAS熔体腐蚀下Yb ₂ O ₃ -Y ₂ O ₃共稳定的ZrO ₂（YbYSZ）的腐蚀行为。结果发现，YbYSZ表现出比氧化钇稳定的氧化锆（YSZ）更好的CMAS抗性，这归因于出色的相稳定性。CMAS侵蚀引起的晶粒降解与元素的扩散速率有很大关系。Yb ³⁺具有较低的扩散速率，有助于腐蚀过程中的良好相稳定性。相应的第一原理计算进一步证实了这一结论。此外，与YSZ相比，YbYSZ具有更高的热膨胀系数和更低的热导率。