THERMAL PROTECTIVE COATING OBTAINING METHOD Russian patent published in 2013 - IPC C23C14/48 C23C14/22 

FIELD: machine building.

SUBSTANCE: blade surface is subject to ion-implantation treatment with ions of one of the following components: N, Y, Yt, or with their combination. A thermal resistant underlayer and a ceramic layer are applied. After ceramic layer is applied by means of ion-plasma method, the first layer of nickel-based alloy, the second aluminide layer and the third layer from nickel-based alloy is applied, after which diffusion annealing is performed in vacuum. Ion implantation is performed at energy of ions of 0.2 - 100 keV and density of ion current of 50 mcA/cm² to 10 mA/cm². As material of the first and the third layers, as well as a thermal resistant underlayer, the alloy containing the following components, wt %, is used: Cr - 18% to 34%; Al - 3% to 16%; Y - 0.2% to 0.7%; Ni is the rest, or Cr - 18% to 34%, Al - 3% to 16%, Y - 2% to 0.7%, Co - 16% to 30%, Ni is the rest, and their combinations. The alloy containing the following components, wt %, is used for the second layer: Si - 4.0% to 12.0%; Y - 1.0 to 2.0%, and Al is the rest. As ceramic material, ZrO₂-Y₂O₃ is used in the ratio of Y₂O₃ - 5 - 9 wt %, ZrO₂ is the rest. Thickness of ceramic layer is 20 to 400 mcm, thickness of heat-resistant unerlayer is 15 to 40 mcm, and thicknesses of the first, the second and the third layers are 4 to 12 mcm each, but not more than 28 mcm of their total thickness.

EFFECT: improving operating properties of a thermal protective coating at simultaneous improvement of endurance and cyclic strength of coated parts.

20 cl, 1 dwg, 2 tbl