Investigation of Interface Between Copper and Carbides Coating Deposited by HVOF Spray Process

摘要

Some research has been made on carbide coatings that were deposited on copper substrate by HVOF. The microstructure of coatings and the interface between coatings and substrate have been investigated by means of scanning electron microscopes (SEM) and transmission electron microscopy (TEM), and the reason for the formation of coatings was analyzed. The results show that the microstructure of the interface between coatings and substrate is complex, which includes amorphous layer and nanocrystal on interface, dislocation cells on copper substrate etc. Amorphous layer is formed from heated adhesion after sudden cooling. Nanocrystal comes from the fragmentation of semi-molten carbide.