Review of Application and Research Based on Cold Spray Coating Materials

Abstract

Cold spray technology is an advanced spray technology, and its technical principle is the same as that of additive manufacturing technology. Cold spraying technology combines multiple advantages in the spraying field: not only can the deposition of thick coatings be achieved, but the coatings prepared by this technology have the characteristics of high density, low oxygen content, good mechanical properties of the coating surface, and high deposition efficiency. Cold spraying technology can prepare corrosion-resistant coatings, high-temperature resistant coatings, wear-resistant coatings, conductive coatings, anti-oxidation coatings, and other functional coatings. After decades of development and exploration, cold spraying technology is preparing metal coatings. The application is very wide and the process is mature; the same cold spray technology can also prepare non-metallic coatings. Mainly to immerse repair and protect the surface of metal alloy parts and a small part of non-metal parts, so that these parts have better mechanical properties and mechanical behavior. This article mainly reviews the application of cold spray technology in the field of spray materials and summarizes the existing conventional metal series, rare metal series and non-metal material, conventional non-ferrous metals: copper, titanium, aluminum and nickel. Metal materials are currently widely used in the field of cold spraying. Among them, titanium-based metals restrict their applications due to their own properties; rare metals: tungsten, tantalum, and niobium-based metal materials. The application of rare metals in cold spraying is still in its infancy stage; non-metallic materials: polymer materials and ceramic powder materials, non-metallic materials have the characteristics of surface modification and strengthening technology, but also have low oxygen content, low thermal stress, high density, good bonding strength, in the deposition process and the substrate will not change the advantages of physical organization structure. Finally, the existing problems of rare metal materials and non-metal materials are raised.

Optimization of Cold Spray Nozzles Based on the Response Surface Methodology

“…The influence of gas temperature on critical velocity was shown in [20]. Also, spraying Al particles with a distance of 30 mm and Cu particles with a distance of 15 mm were shown in [1,21].…”

“…In cold spray technology, many parameters affect the velocity of particles in the nozzle, which are roughly divided into structural and technical parameters; technical parameters are mainly parameters of the Laval nozzle structure. Tan summarized the technical parameters and their impact on cold spray technology [1,2].…”

Formability and surface quality of non-conventional material sheets for the manufacture of highly customized components

“…Staying in theme of engineering materials, during the last decades, niobium (Nb) and its alloys are getting growing attention due to some intriguing properties: high room temperature ductility and melting temperature, exceptional strength at high temperatures and low thermal neutron absorption cross section; moreover, Nb exhibits the lowest density in the family of refractory materials [9]. What is more, Nb shows, among the superconductive elements, both the highest lower critical magnetic field (HC1) [10] and superconducting transition temperature [11], as well as a high normal state thermal conductivity [12].…”