抄録
It is quite difficult to spray fine powders with particle size of -5 micrometers, using conventional HVOF or plasma spraying. A new type of HVOF, referred to as θ-gun, has recently made it possible to spray fine powders of ceramics, as well as metals and cermets without clogging or spitting troubles. The ceramic coatings indicate phenomenally unique microstructures and mechanical properties, such as much higher wear resistance, due to higher cohesive strength between particles and less thermal deterioration during spraying, compared with those of the coatings prepared by conventional plasma spraying.
