Effect of ultrasound treatment of the substrate on the formation of the coating in detonation spraying

Perspectives of Using Ultrasonic surface hardening in Machine Part Manufacturing

“…Controlling the microgeometry parameters during the ultrasonic surface hardening should be considered as the possibility of creating coatings with the favorable structure and properties. Papers [6,12] show the positive effect of morphology of an absolutely new regular micro-relief on spreading liquid sprayed particles and forming the drops spreading and solidifying on the surface. A specific micro-relief with a fine-grained material structure contributes to providing a reliable adhesion bond.…”

“…Similar mechanisms are interesting not only from the viewpoint of obtaining the compression stress and hardening but also from the standpoint of activating the surface layer. Papers [6,8,14] study the possibilities of activating the surface layer of steels and nonferrous metals to ease the ion transfer during the thermo-chemical processing.…”

“…Their distinguishing feature is the thermodynamic stability, which contributes to stabilizing the nitride-hardened metal at higher temperatures, thus providing the effective strengthening of the material. The effect described is connected with increasing the intensity of intra-crystalline diffusion, growing the number of crystallization nucleus of nitride particles and increasing the density of the linear defects in the surface layer [6,7].…”

“…Nowadays one can observe the shift of research and practical interests to the possibilities of providing better operational characteristics of the surface layer by changing the metal structure in the surface layer, which considerably expands the spheres of using the method. Due to additional possibilities for modifying the surface layer, it is possible to obtain the increase in adhesion and diffusion of coatings on the surfaces processed by the ultrasonic surface hardening [6,7].…”

Formation of Strengthened Layers and Coatings Using Hybrid Technologies Including Ultrasonic Treatment

“…The ultrasonic treatment can be used as the pre-, post-and simultaneous process during the gas-thermal coatings deposition. The ultrasonic treatment of the substrate and coating material favorable affects the adhesion, structure and quality of the coating surface [7,8].…”