Fe-based amorphous coatings were prepared on the surface of magnesium alloy by HVOF spraying

and the preparation parameters were optimized. By adding Ni-based interlayer

Fe-based amorphous coating can effectively bond with magnesium alloy substrate

and the minimum porosity reaches 1.65%

and the highest amorphous content is 96.2%

and the highest hardness is 951 HV

0.2

.With the oxygen flow rate of 52 m

3

/h and the kerosene flow rate of 23 L/h

the bonding strength can reach 54.79 MPa. As the transition layer of mechanics and thermodynamics

the Ni-based intermediate layer can realize the mechanical interlock with magnesium alloy substrate through atomic diffusion

and it can interact with Fe-based amorphous coatings. The bonding strength can be improved by increasing the energy of particles

reducing the porosity and the oxidation degree.