Properties of ``Sonarc`` sprayed coatings

The combination of electric arc and HVOF-spraying offers a lot of opportunities to enlarge the field of application for thermal spray technology. If hard material powders are processed by HVOF and simultaneously metal wires by arc spraying, metal matrix composites (MMC) can be formed out. NiCr8020 and aluminum coatings were reinforced by applying various contents of SiC and tested by a taber abraser device. Beside the investigations of the microstructure and the determination of the volume percentage of the hard particle content bond strength tests according European standard EN 582 were carried out. Furthermore, the coatings were tested by corrosion tests. The results are compared to other coating systems and discussed in relation to the obtained microstructure.