Deposition mechanism of plasma sprayed droplets on textured surfaces with different diameter-to-distance ratios
| Autor: | Guo Jin, Na Tan, Bin-shi Xu, Shu-ying Chen, Hai-dou Wang, Zhi-guo Xing, Wang Xiaoli |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Bond strength Scanning electron microscope Mechanical Engineering Metallurgy 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Transmission electron microscopy lcsh:TA401-492 Particle General Materials Science lcsh:Materials of engineering and construction. Mechanics of materials Wetting Texture (crystalline) Composite material 0210 nano-technology Thermal spraying |
| Zdroj: | Materials & Design, Vol 133, Iss, Pp 19-29 (2017) |
| ISSN: | 0264-1275 |
| Popis: | The laser method was used to process dimples with different diameters and distances on ASTM 1045 steel substrates. Ni60 alloy powders were deposited on the textured substrates using atmosphere plasma spray technology. Single sprayed particles were collected to study the spreading behavior. Scanning electron microscopy was applied to characterize the cross-section morphology of splats and coatings, investigating the deposition behavior of droplets. Image analysis was used to calculate the open angle of first particle, thus also providing information on the subsequent particles. Transmission electron microscopy was used to investigate the crystal structure of coatings near the interface. The bonding strength of coatings was evaluated by pull-off tests. The impact of various texture parameters on the adhesion strength of coatings was investigated. The results showed that bonding strength improved with increasing texture diameter and decreasing texture distance. Wetting behavior between two particles as well as bond style between particles and substrates have great influence on bond strength of coatings with the variant texture diameter and distance. The diameter-to-distance ratio was found to be the factor directly determining the adhesion strength between substrates and coatings. Keywords: Adhesion strength, Sprayed coatings, Diameter-to-distance ratio, Deposition state, Microstructure |
| Databáze: | OpenAIRE |
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