Tribology and Nanoindentation Study of Suspension HVOF Thermally Sprayed Alumina Coating
| Autor: | Hussain, T., Shaw, E. C., Pala, Z., Xu, F., Andrew SM Ang |
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| Rok vydání: | 2016 |
| Zdroj: | Scopus-Elsevier |
| ISSN: | 2768-1505 2768-1491 |
| DOI: | 10.31399/asm.cp.itsc2016p0361 |
| Popis: | In this study, a water-based corundum suspension was used to deposit 60 μm alumina coatings onto carbon steel substrates by HVOF spraying. The aim was to develop thin coatings with superior wear properties. Hydrogen was used as a fuel gas and process parameters were varied to determine their effect on microstructure and properties. Coating microstructure was examined by SEM to assess particle melting and morphology and XRD was used to study the phase transformation of the feedstock suspension. At higher combustion flame energy, the coating transformed primarily to gamma alumina, while at lower energy, it was found to be a mixture of alpha and gamma alumina. Nanoindentation tests were used to measure the hardness and elastic modulus of individual phases. Ball-on-plate wear tests helped reveal the relationship between wear performance and the alpha-gamma ratios in the coatings. |
| Databáze: | OpenAIRE |
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