The low-pressure method "Cold Gas Dynamic Spray", is a solution for applying dissimilar and unidimensional coatings using a gas jet that accelerates the powdered coating material to a speed of about 600 m/s. The propellant gas is additionally heated to temperatures much lower than the melting points of the materials joined by this method. By maintaining the relatively low temperatures of the coating process, the structure of the base material is not degraded, so no heat-affected zone is observed. The energy that allows the bonding of the coating material to the substrate material is supplied to the coating area in the form of thermal energy and kinetic energy resulting from the supersonic velocity of the sputtered coating particles. As a result of the described coating mechanism, a connection of a mechanically adhesive nature is formed between the substrate material and the coating particles. Thus, it is possible to apply coatings of materials with significantly different physical and chemical properties.
An important feature of coatings produced by the "Cold Gas Dynamic Spray" method is the ability to build up layers of Aluminum, both with a thickness of no more than 0.1 mm, as well as layers of considerable height, thus creating fills of cavities or islands on the substrate material.
Examples of mating substrate and coating materials.:
Aluminum on Aluminum
Aluminum on Steel
Aluminum on milled polyamide
Aluminum on PETG printed
Copper on aluminum
Copper on Steel
Zinc on Steel
Zinc on Aluminium
Tin on Aluminum
Tin on Steel
Tin on Copper
Tin on milled Polyamide
Tin on PETG printed
Molybdenum disulfide on Aluminum
Molybdenum disulfide on Steel
Molybdenum disulfide on Copper
