Structure, mechanical properties, and special features of failure of nickel-based detonation coatings

Alloying nickel with chrome, aluminum, and boron, as well as the variation of the spraying conditions makes it possible to control purposefully the composition, structure, and properties of the detonation coatings. In alloying nickel with aluminum and chrome, the strength properties of the coatings are fully utilized at thicknesses not greater than 0.25 mm. The adhesion strength of these coatings to the titanium substrates is 35–150 MPa, to steel substrates 20–120 MPa, in the thickness range 0.1–0.3 mm. The ductility properties of the coating are utilized only to 40–60% in comparison with the dense material of the same composition. The ductility of the coatings is reduced most markedly by additions of aluminum and boron, whereas the addition of chrome causes the smallest reduction.