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Process optimisation of alumina coatings by modification of powder characteristics in the aerosol deposition method.
- Source :
-
Journal of the European Ceramic Society . May2024, Vol. 44 Issue 5, p3147-3157. 11p. - Publication Year :
- 2024
-
Abstract
- The aerosol deposition process, involving the impact of solid particles on a substrate at high velocities, is an attractive method for the manufacture of ceramic coatings at room temperature. For process optimisation, it is crucial to select a powder having the appropriate physical characteristics and evaluate the particle flow behaviour during the deposition process. In this study, a powder modification process using high-energy milling and spray drying to improve the applicability of precursor powders was developed and evaluated both numerically and experimentally. A modified aerosol deposition system incorporating a brush-type aerosol generator was employed to maintain the continuity of the aerosol supply and improve the stability of the particle concentration. The deposition efficiency was nearly tripled when using spray-dried granules (0.68%) instead of the as-received powders (0.26%). From tribological measurements, the strongest interfacial bonding was also confirmed for coatings prepared with alumina granules. [ABSTRACT FROM AUTHOR]
- Subjects :
- *PROCESS optimization
*AEROSOLS
*POWDER coating
*SPRAY drying
*GRANULAR flow
Subjects
Details
- Language :
- English
- ISSN :
- 09552219
- Volume :
- 44
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Journal of the European Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 174873016
- Full Text :
- https://doi.org/10.1016/j.jeurceramsoc.2023.12.085