Strontium zirconate (SrZrO₃) commercial powder was plasma sprayed using a high-feedrate water-stabilized plasma system (WSP) torch. Coatings with a thickness of about 1 mm were produced. Now, we are concentrating on a topic never addressed for pure SrZrO₃ coatings: how the coatings interact with natural dust, known as calcium-magnesium-aluminum-silicate (CMAS). We selected various regimes of thermal treatment where SrZrO₃ coatings were exposed to CMAS, and studied chemical changes, phase changes and the microstructure evolution of the influenced coatings. Microhardness of the exposed coatings was monitored as well. The results would help to understand, how the excellent refractory material SrZrO₃ interacts with natural silicates. We kept in mind that pure SrZrO₃ is not optimal for a thermal barrier application because of high-temperature phase transformations, but to study the CMAS-induced phenomena in more complex compositions, for example La₂Zr₂O₇-SrZrO₃, is difficult and interpretations have not been completed currently. The value of the actual research is in the separation of the phenomena typical just for SrZrO₃. A potential for newly developed phases to serve as a sacrificial components of various barrier-coating systems is discussed. Several physical aspects of the newly developed components are discussed as well, namely the luminescence. Here the dust-based phases shifted down the temperature at which luminescence can occur in pure SrZrO₃ ceramics. The entire thickness of influenced layers was relatively high, around 300 µm. The amorphous component, predominant after short-term CMAS exposure, was subsequently crystallized to various phases, namely SrSiO₃ and monoclinic as well as tetragonal zirconia.

中文翻译：

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锆酸锶锶等离子喷涂涂层与天然硅酸盐（CMAS）粉尘的相互作用—发光相的起源

锆酸锶（SrZrO ₃）商品粉末使用高进给量水稳定等离子体系统（WSP）炬进行等离子喷涂。产生具有约1mm的厚度的涂层。现在，我们专注于一个从未针对纯SrZrO ₃涂层解决的话题：该涂层如何与天然粉尘相互作用，即钙镁铝硅酸盐（CMAS）。我们选择了将SrZrO ₃涂层暴露于CMAS的各种热处理方式，并研究了受影响的涂层的化学变化，相变和微观结构演变。还监测暴露涂层的显微硬度。结果将有助于了解优质耐火材料SrZrO ₃如何与天然硅酸盐相互作用。我们谨记，由于高温相变，纯SrZrO ₃并不是最佳的热障应用，而是研究CMAS诱导的更复杂成分中的现象，例如La ₂ Zr ₂ O ₇ -SrZrO ₃是困难，目前尚未完成解释。实际研究的价值在于分离仅针对SrZrO _3的典型现象。讨论了将新开发的相用作各种隔离涂层系统的牺牲成分的潜力。还讨论了新开发组件的几个物理方面，即发光。在此，基于粉尘的相降低了纯SrZrO ₃陶瓷可能发生发光的温度。受影响层的总厚度相对较高，约为300 µm。在短期CMAS暴露后主要存在的无定形组分随后结晶为各种相，即SrSiO ₃和单斜晶以及四方氧化锆。