Glassy deposits, largely consisting of CaO-MgO-Al₂O₃-SiO₂ (CMAS), are a common product on thermal barrier coatings (TBCs) within gas-turbines after an interaction with airborne particles. Here, in order to facilitate the quantification and modelling of the spreading and infiltration behavior of CMAS melts onto and into TBCs we have determined the high temperature viscosities of four widely used synthetic “CMAS” melts and the influence of TBC materials (yttria-stabilized zirconia (YSZ) and gadolinium zirconate (GZO)) dissolution upon them. After a dissolution of 6.5 wt% YSZ or GZO one out of four CMAS melts shows no significant change in viscosity, while the other three melts exhibit a viscosity increase at lower temperatures that continuously changes to a decrease in viscosity towards higher temperatures. The influence of the doping amount on the viscosity was investigated in detail for one CMAS melt (C₃₅M₁₀A₇S₄₈) and parametrized.

玻璃状沉积物，主要由CaO-MgO-Al ₂ O ₃ -SiO _2组成（CMAS）是燃气轮机中与空气中的颗粒相互作用后在热障涂层（TBC）上常见的产品。在这里，为了便于量化和建模CMAS熔体在TBC上和向TBC的扩散和渗透行为，我们确定了四种广泛使用的合成“ CMAS”熔体的高温粘度以及TBC材料（氧化钇稳定的氧化锆）的影响。 （YSZ）和锆con（GZO））溶解在其上。在溶解6.5 wt％的YSZ或GZO之后，四个CMAS熔体中的一个熔体粘度没有明显变化，而其他三个熔体在较低温度下的粘度升高，并随着温度的升高而逐渐降低。对于一种CMAS熔体（C₃₅ M ₁₀ A ₇ S ₄₈）和参数化。