Manufacture of coatings with mixed compositionsby means of powder arc spraying using a facilitydeveloped specifically for this purpose

This article describes the development and operating mode of arc spraying apparatus with additional powder supply in order to manufacture mixed coatings consisting of metal and polymer, metal and ceramic or metal and glass. Optimum parameters were established for the application of metal / glass, metal / polymer powder, metal / Al2O3 and metal / ZrO2 coatings which resulted in the stipulated composition and the demanded physical and mechanical properties. Furthermore, optimum parameters were compiled for the precrystallisation heat treatment of the coatings manufactured by means of arc spraying with additional powder. Not only the hardness, wear resistance and bond strength of the joint with the base material but also the thermal conductivity of the mixed coatings applied with the new apparatus were determined.