Abstract: Ni-TiN composite coatings were prepared by ultrasound-assisted electrodepositing method on 45# streel.The composite coating was detected by XRD diffraction.And the 3-dimensional surface topography of the composite coatings were observed and analyzed by using atomic force microscopy (AFM) and transmission electron microscopy (TEM).The result indicate that the diffraction peak intensity of Ni-TiN nano composite coating is the highest, and the Ni and TiN phases are significantly refined when the ultrasonic power is 300 W.The distribution of TiN nanoparticles is uniform, and there is no significant aggregation in the coating.

Key words: Ni-TiN composite coatings were prepared by ultrasound-assisted electrodepositing method on 45# streel.The composite coating was detected by XRD diffraction.And the 3-dimensional surface topography of the composite coatings were observed and analyzed by using atomic force microscopy (AFM) and transmission electron microscopy (TEM).The result indicate that the diffraction peak intensity of Ni-TiN nano composite coating is the highest, and the Ni and TiN phases are significantly refined when the ultrasonic power is 300 W.The distribution of TiN nanoparticles is uniform, and there is no significant aggregation in the coating.