In the 1980s, a deposition technique known as cold spray solid-state coating
was created. Cold spray technology, unlike conventional thermal spray techniques, can
maintain the natural properties of the feedstock, prevent damage to the constituent
elements of the substrate and create extremely solid coatings. Nanostructured coatings
have the potential to significantly enhance their properties compared to conventional,
non-nanostructured coatings. Furthermore, surface coating on metal substrates is a very
difficult challenge for the researcher due to the contradictory requirements for various
properties. The ability of cold spray to form coatings with nanostructures has also been
demonstrated to a great extent. This work aims to provide an in-depth analysis of
nanostructured cold-sprayed metal coatings. First, a description of the cold spray
technique is given. Next, the issue of Nano crystallization in standard metal coatings is
discussed. Then, microstructures and properties of nanomaterial-reinforced metal
matrix composite (MMC) coatings and cold-sprayed nanocrystalline metal coatings are
discussed. In conclusion, a summary and future prospects for cold spray technology are
given. To conclude, the process of developing nanostructured metal coatings has been
completed.
Keywords: Coating thickness, Gradient properties, Process parameters.
