In Situ Raman Spectroscopic Study of Yttria‐Stabilized Zirconia Attack by Molten Sodium Vanadate
In Situ Raman Spectroscopic Study of Yttria‐Stabilized Zirconia Attack by Molten Sodium Vanadate
复制标题
熔融钒酸钠侵蚀氧化钇稳定氧化锆的原位拉曼光谱研究
DOI：
10.1111/j.1151-2916.1984.tb19683.x
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发表时间：
1984
影响因子：
3.9
通讯作者：
A. Nagelberg
中科院分区：
文献类型：
--
作者：
J. C. Hamilton;A. Nagelberg
利用拉曼光谱研究了热障涂层陶瓷的熔盐侵蚀行为。用8wt%的氧化钛稳定氧化锆，将其浸入偏钒酸钠熔体和偏钒酸钠/硫酸钠熔体中。原位拉曼测量可以在攻击过程中同时观察陶瓷相和盐的化学成分。陶瓷由立方/四方相转变为单斜相，同时与陶瓷接触的熔盐层发生化学变化。这些现场测量得到了常规曝光后检查和曝光后拉曼测量的补充。侵袭速度对熔盐溶液中钒酸根的摩尔分数非常敏感。参考文献28篇。
Raman spectroscopy has been used to study the molten salt attack of ceramics used as thermal barrier coatings. Zirconia stabilized with 8 wt percent yttria was immersed in sodium metavanadate melts and in sodium metavanadate/sodium sulfate melts. In situ Raman measurements allowed simultaneous observation of the ceramic phases and salt chemistry during the attack process. The ceramic was seen to transform from the cubic/tetragonal to the monoclinic phase, concurrent with chemical changes in the molten salt layer in contact with the ceramic. These in situ measurements were complemented by conventional postexposure examination and by postexposure Raman measuremnts. The rate of attack was found to be quite sensitive to the mole fraction of vanadate in the molten salt solution. 28 references.