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The paper describes the properties of Ti, Nickel-based, and Al2O3 powder coatings obtained through a new method of powder acceleration which allows to achieve the powder velocity of 1400m/s. The Ti-based coatings thus formed have nanocrystal and amorphous structure with nanodispersed ceramic compounds inclusions, and show the hardness of up to 16GPa, high plasticity and adhesion strength. The Nickel-based alloy coatings display both nanocrystal and amorphous structure. In ceramic Al2O3 coatings high spraying velocity allows filling in the space between the deformed oxide particles (about 0.053 microns in size) by nanocrystal and amorphous phases; thus, the coatings acquire a high degree of plasticity retaining high hardness of 1320 HV0.3 with the porosity below 0.5%. The Al2O3 coatings were tested and found effective for covering the surface of porous metal matrixes in burners.

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The dense ceramic coatings based on alumina with hardness of 1100[Formula: see text][Formula: see text][Formula: see text]25 HV[Formula: see text] and porosity of less than 1% have been prepared by multi-chamber detonation sprayer (MCDS) with a barrel length of 500[Formula: see text]mm. The intermetallic compound of type FeAl was revealed in the area of the coating that adjoins the substrate.