In conclusion the results showed that the Al

The surface of Al–Si/Al2O3 coatings sprayed by laser ABT378 spraying was smooth, with few unmelted particles and low porosity (the lowest was 3.6%), as well as the maximum adhesion strength was up to 25.62 MPa, far higher than the coatings sprayed only by plasma. Columnar crystal was generated on the surface of coatings, greatly increasing the hardness of the matrix, with the maximum hardness up to HV0.05470 (4.61 GPa).