The difference between the three mainstream thermal spraying technologies for amorphous coatings

       The amorphous content of Fe48Mo14Cr15Y2C15B6 amorphous coating prepared by plasma spraying, supersonic flame spraying and explosive spraying is 79.39%, 85.26% and 88.14%, respectively; the coating porosity is 2.5%, 1.9% and 1.5%, respectively. The most critical factor affecting the amorphous content of the coating is the spraying temperature, and the most critical factor affecting the porosity is the melting state and spreading degree of the particles.



The wear mechanisms of stainless steel substrates are abrasive wear and adhesive wear. The wear mechanism of plasma sprayed iron-based amorphous coatings is fatigue wear accompanied by adhesive wear. The wear mechanism of HVOF and explosively sprayed iron-based amorphous coatings is typical fatigue wear. "River lines" can be observed on the friction surface of the explosively sprayed iron-based amorphous coating.



The wear resistance of iron-based amorphous coating is stronger than that of stainless steel substrate. The wear resistance of iron-based amorphous coatings prepared by supersonic flame spraying and explosive spraying is more than four times that of stainless steel substrates. The wear rate of both the amorphous coating and stainless steel increases with the increase of the sliding rate of the counterpart.