High Velocity Suspension Flame Sprayed (HVSFS) Hydroxyapatite Coatings for Biomedical Applications
- N., Stiegler
- Bellucci, Devis
- Bolelli, Giovanni
- Cannillo, Valeria
- R., Gadow
- A., Killinger
- Lusvarghi, Luca
- Sola, Antonella
DOIAbstract
In this study, hydroxyapatite (HAp) coatings were deposited on Ti plates by the high-velocity suspension \ufb02ame spraying (HVSFS) technique. The process characteristic, the microstructure and phase composi- tion of the coatings are signi\ufb01cantly in\ufb02uenced by the solvent and by the design of the combustion chamber (CC) of the HVSFS torch. Water-based suspensions always lead to fairly low surface tem- peratures ( 350 \ub0C), deposition ef\ufb01ciencies <40%, and produce coatings with low amount of crystalline HAp, which tend to dissolve very rapidly in simulated body \ufb02uid (SBF) solutions. DEG-based suspen- sions, when sprayed with properly-designed CCs, produce deposition ef\ufb01ciencies of 45-55% and high surface temperature...
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