Cavitation erosion of plasma sprayed YSZ coatings produced by feedstocks with different initial sizes
| Autor: | Marie-Pierre Planche, Jorge Stella, Geoffrey Darut, Thierry Poirier, Hanlin Liao, Yan Wang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Mechanical Engineering Erosion corrosion Metallurgy 02 engineering and technology Surfaces and Interfaces engineering.material 021001 nanoscience & nanotechnology Indentation hardness Surfaces Coatings and Films 020303 mechanical engineering & transports 0203 mechanical engineering Coating Mechanics of Materials Cavitation engineering Degradation (geology) 0210 nano-technology Porosity Thermal spraying Yttria-stabilized zirconia |
| Zdroj: | Tribology International. 111:226-233 |
| ISSN: | 0301-679X |
| DOI: | 10.1016/j.triboint.2017.03.019 |
| Popis: | Cavitation erosion of plasma sprayed yttria stabilized zirconia coatings produced by feedstocks with different initial sizes was investigated according to the main guidance of ASTM-G32. Prior to thermal spray, substrates were preheated to 150 and 300 °C. The size distribution of pores on the surface of coatings (as-sprayed and eroded) was estimated specifically to investigate its influences on the surface degradation during cavitation erosion. The results indicate that high feedstock size leads to high porosity of coating and low microhardness along with low resistance against cavitation erosion. Additionally, preheating processes could improve the coating resistance against cavitation erosion. The pore size distribution analysis results reveal that initial pores grow up and coalesce and cavitation pits format during cavitation erosion tests. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect