Characterization of Plasma-Sprayed Yttria-Stabilized Zirconia Coatings by Cathodoluminescence
Characterization of Plasma-Sprayed Yttria-Stabilized Zirconia Coatings by Cathodoluminescence
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DOI：
10.1007/s11666-009-9370-x
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发表时间：
2009-08
影响因子：
3.1
通讯作者：
G. Mauer;D. Sebold;R. Vaßen;D. Stöver
中科院分区：
文献类型：
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作者：
G. Mauer;D. Sebold;R. Vaßen;D. Stöver
单斜氧化锆相的出现对氧化钇稳定氧化锆（YSZ）热障涂层（TBC）的性能具有重要影响。因此，需要一种可靠的方法来检测其含量并研究其在母体微观结构内的空间分布。这是应用阴极发光（CL）光谱的动机。采用常压等离子喷涂技术制备了不同孔隙率的YSZ涂层。 CL 分析得出高孔隙样品的单斜相含量为 5.2 ± 1.6%，低孔隙样品的单斜相含量为 3.4 ± 0.5%。结果通过X射线衍射(XRD)定性证实。然而，由于其检测灵敏度较低，X射线衍射结果的定量水平较低。由于其合成方法，所应用的粉末原料显示出相当含量的单斜晶相。颗粒温度越低，未转化的单斜晶相的比例就越大。喷涂高孔隙 TBC 时必须考虑这一点。
The occurrence of monoclinic zirconia phase has an important impact on the performance of thermal barrier coatings (TBC) of yttria-stabilized zirconia (YSZ). Therefore, a reliable method is needed to detect its contents and to investigate also its spatial distribution within the parent microstructure. This was the motivation to apply cathodoluminescence (CL) spectroscopy. YSZ coatings with different porosities were manufactured by atmospheric plasma spraying. CL analysis yielded monoclinic phase contents of 5.2 ± 1.6% for the high-porous sample and 3.4 ± 0.5% for the low-porous sample. The results were qualitatively confirmed by x-ray diffraction (XRD). However, due to its lower detection sensitivity the XRD results are quantitatively on lower level. Owing to its synthesis method, the applied powder feedstock showed a considerable content of monoclinic phase. The lower the particle temperatures were the larger fraction of monoclinic phase remained untransformed. This has to be considered when spraying high-porous TBCs.