Ultrasonic cavitation erosion of as-sprayed and laser-remelted yttria stabilized zirconia coatings
| Autor: | Thierry Poirier, Jorge Stella, Geoffrey Darut, Yan Wang, Marie-Pierre Planche, Hanlin Liao |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Erosion corrosion Metallurgy Atmospheric-pressure plasma 02 engineering and technology Epoxy 021001 nanoscience & nanotechnology Laser law.invention 020303 mechanical engineering & transports 0203 mechanical engineering law Cavitation visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Particle Composite material 0210 nano-technology Layer (electronics) Yttria-stabilized zirconia |
| Zdroj: | Journal of the European Ceramic Society. 37:3623-3630 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2017.04.037 |
| Popis: | Cavitation erosion resistance of 8 wt.% yttria stabilized zirconia has been investigated in specimens prepared by atmospheric plasma spraying and laser remelting post treatment. The results indicate that as-sprayed coatings involve defects such as primary cavities and initial micro cracks inside a particle and among the interfaces of particles. When the specimens are subjected to cavitation erosion, the micro cracks initiate and coalesce along with chip removals. Laser remelting produces a dense glazed layer with some cracks though the coatings. With the increasing of erosion time, large pieces are delaminated from coating-substrate interface leading to a significant mass loss. However, the resistance of laser remelted coatings to cavitation erosion is significantly improved when they are impregnated with epoxy by vacuum castable mounting. The relationship between cracks formed inside the laser remelted YSZ coatings and their damage mechanism under cavitation is discussed. |
| Databáze: | OpenAIRE |
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