Abstract
Thermal Spraying of submicron and nanoscaled powder materials require the application of agglomerated powders that can be processed with standard HVOLF (High Velocity Oxy Liquid Fuel Flame Spraying) equipment, or the conversion of these powders into a finely dispersed suspension together with an organic solvent, appropriate for suspension spraying (HVSFS: High Velocity Suspension Flame Spraying). Both methods are suitable for the manufacturing of finely structured and dense coatings and offer new possibilities in functional coating development for new application fields. Due to their refined microstructure, mechanical and physical coating properties can differ significantly from their conventionally sprayed counterparts. The paper gives an overview of HVOLF sprayed WC-Co cermets containing submicron and nanocarbides and HVSF sprayed nanooxide ceramics used in numerous technical applications.
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