Vacuum plasma spraying coat metals

The accepted method to coat metals is vacuum plasma spraying (VPS), but a new method called high velocity oxy-ffiel (HVOF) thermal spraying has been developed and is more cost-effective and has thus made the use of composites much more practical. 

The objective is to deposit a ceramic layer on a support (metal, ceramic, organic) to obtain surface properties different from the massive material. The applications of these coated materials are numerous (tribology, heat insulation, corrosion resistance, electronics, optics, optoelectronic, biomedical, etc.). The thickness of the layers can vary from a few atomic layers for techniques of vacuum deposition (they are called thin layers) to a few milUmeters in the case of plasma spraying. 

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