HVSFS Al2O3-TiO2 Coatings of Porous Aluminium Substrates
| Autor: | M. Sauter, V. Martínez García, A. Killinger |
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| Rok vydání: | 2022 |
| Zdroj: | International Thermal Spray Conference. |
| ISSN: | 2768-1505 2768-1491 |
| DOI: | 10.31399/asm.cp.itsc2022p0596 |
| Popis: | In a novel approach for guiding elements of sawing machines wear resistant coatings were applied on open-porous AlSi7Mg substrates by means of high velocity suspension flame spraying (HVSFS). The challenge is to establish a wear resistant coating but simultaneously maintain the open-porous structure that is necessary to serve as a permeable structure for liquid cooling or lubricant media under operation. In a first approach, a water-based suspension containing a mixed Al2O3-TiO2 powder for HVSFS was used to deposit dense and well adherent mixed-oxide coatings. As the substrates exhibit an open-porous structure and a well-defined pore size distribution, transpiration cooling through the pores is possible and even necessary in order to ensure a low thermal impact on the fragile pore structure, preserving the open-porosity of the substrate. The coatings are characterized and compared by the means of light microscopy and hardness indentation. |
| Databáze: | OpenAIRE |
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