冷喷涂Ni及镍基复合涂层研究进展

Nickel and its alloys have good corrosion and high-temperature oxidation resistance. Cold-spraying (CS) can be applied to Ni and Ni-based composite coatings with good corrosion resistance, due to its advantages of low heat input, dense microstructure, high deposition efficiency, and fast deposition rate, etc. In terms of the open publications, this study summarized the prediction of the critical and particle velocities of Ni-powder particles during CS and then analyzed its deposition characteristics and bonding mechanisms; the property improvement of cold-sprayed Ni and Ni-based composite coatings can be achieved by adjusting the nozzle, powder, and gas parameters; CS combined with laser processing, shot peening, hot rolling, and other technologies can further improve the coating quality; the addition of ceramic particles can increase the strength and corrosion resistance of Ni and Ni-based composite coatings. Finally, several expectations for the widespread application of cold-sprayed Ni and Ni-based composite coatings were presented.