Effect of processing and service conditions on the luminescence intensity of plasma sprayed (Tm3++Dy3+) co-doped YSZ coatings

•The luminescence intensity of coating (LMC) is inverse ratio to the porosity.•The phase composition has influence on LMC.•The appearance of new cracks can be monitored by LMC. The effect of spraying distance, aging duration and loading on the luminescence intensity of plasma sprayed (Tm3++Dy3+) co-...

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Bibliographic Details
Published in:Journal of alloys and compounds 2014, Vol.584, p.136-141
Main Authors: Wang, Weize, Wei, Jingjing, Hong, Huoxing, Xuan, Fuzhen, Shan, Yuejin
Format: Article
Language:English
Subjects:
Coatings
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Fracture mechanics
Inverse
Luminescence
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Phase composition
Photoluminescence
Physics
Plasma spraying
Porosity
Spraying
Thermal barrier coatings
Yttria stabilized zirconia
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Summary:•The luminescence intensity of coating (LMC) is inverse ratio to the porosity.•The phase composition has influence on LMC.•The appearance of new cracks can be monitored by LMC. The effect of spraying distance, aging duration and loading on the luminescence intensity of plasma sprayed (Tm3++Dy3+) co-doped YSZ (yttria stabilized zirconia) coatings are investigated. The porosity fraction of coatings shows an increase tendency with increasing spraying distance, while the luminescence intensity exhibits the inverse tendency. The phase composition and emission spectra of coatings change with the variation in the aging time. There is more monoclinic and cubic zirconia with the increment of aging time. New cracks appear in the coating during the loading process, and further the luminescent intensity shows a fluctuation tendency during the coupon is bending. The emission intensity of coatings is affected by the porosity fraction and the phase composition.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2013.08.046