Stresses within rare-earth doped yttria-stabilized zirconia thermal barrier coatings from in-situ synchrotron X-ray diffraction at high temperatures

There is a growing interest for smart coatings that can be integrated into turbine engines in-situ temperature measurements or health monitoring. The addition of rare-earth dopants standard thermal barrier ceramic top coat materials used to obtain luminescent enable spectral measurements, real-time thermomechanical performance and durability such novel coating compositions in extreme environments still remains evaluated. Consequently, the ability manufacture sensor which present suitable properties needs demonstrated. For this study, highly erbium europium doped yttria-stabilized zirconia state-of-the-art manufactured by air plasma spray were characterized determine effects embedded on internal strain stress quantify compare their high response using synchrotron X-ray diffraction. In-situ depth-resolved performed at 15 μm intervals along depth evaluate key locations, specifically layer interfaces. In-plane was calculated finite element model implemented supplement results further predictions. show work revealed only minor variations under typical cycle especially temperatures closer gas operating conditions, compared coatings. This demonstrates viability manufacturing provide beneficial spectroscopic monitoring capabilities while having minimal impact