Effects of Reducing Atmosphere on the Luminescence of Eu3+-Doped Yttria-Stabilized Zirconia Sensor Layers in Thermal Barrier Coatings
Effects of Reducing Atmosphere on the Luminescence of Eu3+-Doped Yttria-Stabilized Zirconia Sensor Layers in Thermal Barrier Coatings
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DOI：
10.1111/j.1551-2916.2008.02866.x
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发表时间：
2009
影响因子：
3.9
通讯作者：
Yang Shen;D. Clarke
中科院分区：
文献类型：
--
作者：
Yang Shen;D. Clarke
Eu3+掺杂的钇稳定的氧化锆（YSZ）作为一个嵌入层的热障涂层发光温度传感的使用以前已经证明在空气中。在这项工作中，暴露于还原性气氛的发光光谱和发光寿命作为温度的函数的影响报告。还原性气氛，降低到<10−11 ppm的氧分压（），对Eu3+发光光谱或高达900°C的发光寿命没有影响，尽管总体发光强度降低。发光寿命对氧分压的温度依赖性的不敏感性表明基于Eu 3+掺杂的YSZ的温度传感器可以有信心地用于还原以及空气气氛中。结果还表明，负责发光寿命的温度依赖性的电荷转移机制是不受还原引入的氧空位。
The use of Eu3+-doped yttrium-stabilized zirconia (YSZ) as an embedded layer in thermal barrier coatings for luminescence temperature sensing has previously been demonstrated in air. In this work the effects of exposure to reducing atmospheres on the luminescence spectra and luminescence lifetime as a function of temperature are reported. No effect of reducing atmosphere, down to oxygen partial pressures() of <10−11 ppm, on either the Eu3+ luminescence spectrum or the luminescence lifetime up to 900°C are seen although the overall luminescence intensity is decreased. The insensitivity of the temperature dependence of the luminescence lifetime to oxygen partial pressure indicates that Eu3+-doped YSZ based temperature sensors can be used with confidence in reducing as well as in air atmospheres. The results also suggest that the charge transfer mechanism responsible for the temperature dependence of the luminescence lifetime is unaffected by the oxygen vacancies introduced by reduction.