Formation of Amorphous Fe-Cr-P-C Alloy Coating Films by a Newly Developed Thermal Spraying Technique
Some amorphous Fe-Cr-P-C coating films having high hardness and high corrosion resistance have been produced by a newly developed thermal spraying technique. In order to control the temperatures of the powder particles in the flame spray and the substrate, a newly developed cylindrical nozzle, with external cooling nitrogen gas, was mounted to the front end of the thermal spray gun. Fe70Cr10P13C7 films with various external cooling gas velocities between 20 m/s and 40 m/s exhibited entire amorphous structure without oxides and/or unmelted particles. Corrosion-resistance of the films was observed in immersion tests using various corrosive liquids.
Jian-Feng Nie and Allan Morton
M. Komaki et al., "Formation of Amorphous Fe-Cr-P-C Alloy Coating Films by a Newly Developed Thermal Spraying Technique", Materials Science Forum, Vols. 654-656, pp. 1090-1093, 2010