1. Microstructure and luminescence properties of YSZ-based thermal barrier coatings modified by Eu2O3
- Author
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Jin Guo, Liu Erbao, Wang Changliang, Tian Haoliang, Guo Mengqiu, Cui Yongjing, Gao Junguo, and Wang Fuyuan
- Subjects
Thermal shock ,Materials science ,Oxide ,02 engineering and technology ,engineering.material ,01 natural sciences ,Thermal barrier coating ,chemistry.chemical_compound ,Coating ,0103 physical sciences ,Materials Chemistry ,Composite material ,Porosity ,Yttria-stabilized zirconia ,010302 applied physics ,Process Chemistry and Technology ,Doping ,technology, industry, and agriculture ,021001 nanoscience & nanotechnology ,Microstructure ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,chemistry ,Ceramics and Composites ,engineering ,0210 nano-technology - Abstract
In order to study the variation of rare earth oxides during thermal failure of thermal barrier coatings, Eu2O3-doped YSZ coatings with 0.5 mol%, 1.0 mol% and 1.5 mol% were prepared by explosive spraying. SEM, XRD, EDS and microhardness tester were used to analyze the effect of different rare earth oxide doping content on the morphology, composition and mechanical properties of the coatings. The results showed that with the increase of rare earth oxide doping content, the porosity of the coatings decreased, and the microhardness and fracture toughness increased. When the doping amount of rare earth oxide is 1.0 mol%, the bonding strength and thermal cycle times of the coating are the highest, 33.4 Mpa and 185 times respectively. With the increase of the doping amount of rare earth, the luminous intensity of the sprayed coating increases. After thermal shock test, the luminous intensity of Eu2O3-doped YSZ coatings at 592 and 608 nm decreased to a certain extent.
- Published
- 2020