Microstructure and luminescence properties of YSZ-based thermal barrier coatings modified by Eu2O3 |
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| Affiliation: | 1. Department of Chemistry and Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh 160014, India;2. Department of Environment Studies, Panjab University, Chandigarh 160014, India.;3. Centre for Nanobiotechnology, VIT University, Vellore 632014, India.;4. Department of Chemistry, College of Science and Arts, Najran University, Najran 11001, Saudi Arabia;5. Promising Centre for Sensors and Electronic Devices (PCSED), Najran University, Najran 11001, Saudi Arabia;1. Department of Physics and Materials Research Centre, Maharani Cluster University, Bengaluru 560001, Karnataka, India;2. Department of Physics, Government College, Kalaburagi, Gulbarga 585105, Karnataka, India;3. Govt. First Grade College, Chickaballapur 562101, Karnataka India;4. Department of Physics, Bangalore University, Bengaluru 560056, Karnataka, India;5. Department of Physics, Acharya Institute of Graduation Studies, Bengaluru 560107, Karnataka, India;6. Department of Physics, Dr. Babasaheb Ambedkar Marathwada University, Aurangabad, M.S. 431004, India;7. Department of Physics, Vivekananda Institute of Technology, Bengaluru 560074, Karnataka, India;8. Govt. College for Women, Kolar 563101, Karnataka, India;9. Department of Physics, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia;10. Department of Physics, Faculty of Science, Isra University, Amman, Jordan;11. Department of Nuclear Medicine Research, Institute for Research and Medical Consultations (IRMC), Imam Abdulrahman bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia;12. Department of Post–Graduate Studies and Research in Physics, Jayanagar, Bangalore 560070, Karnataka, India |
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| 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. |
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| Keywords: | Rare earth oxides Thermal barrier coatings Mechanical properties Luminous intensity Thermal shock properties |
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