MICROSTRUCTURE OF LASER CLAD Zr-BASED COMPOSITE COATING

A Zr-based amorphous composite coating was produced by laser cladding of metal powder on a Ti substrate. The microstructure of the coating was studied using XRD, SEM, EDX and TEM. The coating consists of a mixture of intermetallic compounds, including a nanocrystal and an amorphous phase. The bonding zone between the substrate and the coating is composed of columnar crystalline α-type solid solution α-Ti/Zr.