Cold‐Sprayed Metal Coatings with Nanostructure

Abstract

Cold spray is a solid-state coating deposition technology developed in the 1980s. In comparison with conventional thermal spray processes, cold spray can retain the original properties of feedstock, prevent the adverse influence on the underlying substrate materials, and produce very thick coatings. Coatings with nanostructure offer the potential for significant improvements in physical and mechanical properties as compared with conventional non-nanostructured coatings. Cold spray has also demonstrated great capability to produce coatings with nanostructure. is paper is aimed at providing a comprehensive overview of cold-sprayed metal coatings with nanostructure. A brief introduction of the cold spray technology is provided first. e nanocrystallization phenomenon in the conventional cold-sprayed metal coatings is then addressed. ereafter, focus is switched to the microstructure and properties of the cold-sprayed nanocrystalline metal coatings, and the cold-sprayed nanomaterialreinforced metal matrix composite (MMC) coatings. At the end, summary and future perspectives of the cold spray technology in producing metal coatings with nanostructure are concluded.

The Effect of the Substrate on the Microstructure and Tribological Properties of Cold Sprayed (Cr3C2-25(Ni20Cr))-(Ni-graphite) Cermet Coatings

“…In these areas, there was a high density of defects, particularly shear bands, as shown in Figure 6 , which were the direct consequence of adiabatically induced localised plastic flow along these boundaries. The adiabatic shear instability in the interfacial strongly deformed regions may also result in the temperature rising rapidly to cause dynamic recrystallisation by lattice and subgrain rotation, as was shown by Zou et al and Yin et al [ 32 , 33 ]. Chaudhuri et al [ 34 ], who investigated the cold sprayed Inconel 625 super alloys on a steel substrate, showed a ~50% coating grain size reduction in comparison with the particle size of the feedstock powder.…”

Abrasion Power of Ti and Ni Diamond-Coated Coatings Deposited by Cold Spray

“…The processing powders were dried in the furnace at 200 • C for about 2 h before the experiments began. Following the procedure reported in [9,[14][15][16][17][18][19][20], the cold spray deposition process was performed.…”

Recent Progress of Metal–Air Batteries—A Mini Review

“…Printing technology has various advantages in microstructure controlling and large batch low-cost fabrication. Printing includes screen printing [71], spray printing [72], direct ink writing processing [73], and roll-to-roll fabrication, as shown in Figure 15. Figure 16 shows printed 1-to 4D structures.…”

“…Figure15. Schematics of (a) a screen printing[71] (Copyright © 2017, RSC Pub), (b) spray printing[72] (Copyright © 2015, John Wiley and Sons), (c) direct ink writing processes[73] (Copyright © 2017, John Wiley and Sons).…”