Measurement of direct strain optic coefficient of YSZ thermal barrier coatings at GHz frequencies.
Measurement of direct strain optic coefficient of YSZ thermal barrier coatings at GHz frequencies.
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DOI：
10.1364/oe.25.019968
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发表时间：
2017-08
期刊：
影响因子：
3.8
通讯作者：
Peter J. Schemmel;Gilles Diederich;A. Moore
中科院分区：
文献类型：
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作者：
Peter J. Schemmel;Gilles Diederich;A. Moore
本文首次报道了在GHz波段采用反射式偏光镜对空气等离子喷涂热障涂层（TBCs）进行应力双折射的观测。测量了沉积在3 mm和1 mm软钢基底上的相同厚度的氧化钇稳定氧化锆（YSZ）APS涂层的应变光学系数分别为（-0.0133 ± 0.0102）× 10-9和（-0.0190 ± 0.0043）× 10-9。的反射测量方法进行了验证，通过额外的测量的应力光学系数的大块氧化钇部分稳定的氧化锆（YTZP）陶瓷与先前报道的传输测量。该技术的最终应用是热障涂层剩余寿命的预测。
We report the first observation of stress induced birefringence in air plasma sprayed (APS) thermal barrier coatings (TBCs) using a reflection based polariscope and GHz illumination. Strain optic coefficients of (-0.0133 ± 0.0102) × 10-9 and (-0.0190 ± 0.0043) × 10-9 were measured for yttria-stabilized zirconia (YSZ) APS coatings of the same thickness deposited on substrates of 3 mm and 1 mm mild steel. The reflection measurement approach was validated by additional measurements of the stress optic coefficient of bulk yttria-partially stabilized zirconia (YTZP) ceramic that were in agreement with previously reported transmission measurements. The ultimate application of this technique is the prediction of remaining life in TBCs.