Detection of Micro-Damage Evolution of Air Plasma-Sprayed Y2O3-ZrO2 Thermal Barrier Coating through TGO Stress Measurement
Detection of Micro-Damage Evolution of Air Plasma-Sprayed Y2O3-ZrO2 Thermal Barrier Coating through TGO Stress Measurement
复制标题
通过 TGO 应力测量检测空气等离子喷涂 Y2O3-ZrO2 热障涂层的微损伤演变
DOI：
10.2320/matertrans.47.2512
复制
发表时间：
2006
影响因子：
1.2
通讯作者：
Y. Kagawa
中科院分区：
文献类型：
--
作者：
Makoto Tanaka;M. Hasegawa;Y. Kagawa
研究了空气等离子喷涂8 mass% Y2 O3稳定ZrO 2热障涂层（APS-TBC）在1150 ℃等温热暴露200 h后的微观损伤演化行为。利用Cr 3+荧光光谱法测量了热障涂层中热生长氧化物（TGO）层的残余应力，并将测得的应力水平与存储在热障涂层系统中的微损伤演化行为进行了比较。当热暴露时间大于10 h时，TBC层出现微断裂现象. TGO层的面内残余应力增加了长达50小时的热暴露时间，此后，随着进一步增加而减小。这些行为与TGO层的厚度和残余应力密切相关。TGO应力的这种降低与微断裂行为的演变形成很好的对比，微断裂行为的演变也与所形成的TGO层的厚度和起伏有关。TGO应力的变化，tgo，取决于TGO层的平均厚度，
The micro damage evolution behavior in air plasma-sprayed 8 mass% Y2O3 stabilized ZrO2 thermal barrier coating (APS-TBC) after isothermal heat exposure at 1150 � C up to 200 h was observed. Residual stress of thermally-grown-oxide (TGO) layer was measured through the TBC layer using Cr 3þ luminescence spectroscopy and the measured stress levels were compared with micro damage evolution behavior stored in the TBC system. With heat exposure time of longer than 10 h, microfracture behaviors were noted in the TBC layer. In-plane residual stress of the TGO layer increased for up to 50 h of heat exposure time, and thereafter, diminished with further increase. These behaviors are strongly correlated with the thickness and the residual stress of the TGO layer. This decrease in the TGO stress well contrasts with the evolution of the micro fracture behavior, which is also related to the thickness and undulation of the formed TGO layer. The change of TGO stress, � tgo, depending on the average thickness of the TGO layer, �