nanoHVOF – Prozesstechnik und Schichteigenschaften einer neuen,hochdichten Spritzschicht

Thermal spray layers are used as protective coatings against wear and corrosion. A vast range of metallic and non metallic materials can be utilized in tailor made surfaces for engines, turbines or agricultural equipment. Conventional thermal spray coatings often show imperfections. Melting or infiltrations of porous layers are methods to improve coating quality even though they are expensive. Special thermal spray processes like HVOF are more advantageous in these cases. The nanoHVOF produces high density coatings with a high hardness. It includes powder, torch and nozzle techniques. The new developed nanoHVOF‐process is described, wear properties are evaluated and nanoHVOF‐coatings metallographically examined. The comparison between nanoHVOF and conventional HVOF coatings is presented.