METHOD OF MAKING MULTI-LAYER COMPOSITIVE COATING Russian patent published in 2017 - IPC C23C4/129 C23C4/06 C23C4/08 C23C24/08 B82Y40/00 

FIELD: technological processes.

SUBSTANCE: lower layer of the coating is applied in a thickness of 100-150 mcm from a mechanically activated Ni powder, the middle layer is 500-900 mcm thick from a mechanically activated powder with a shape memory effect based on TiNiZr, and the upper layer is 150-600 mcm thick from a mechanically activated mixture of powders From BN, B₄C, Co, Ni, C at their ratio, wt %: BN 65-70, B₄C 10-15, Co 8-10, Ni 4-7, C 1-3. Then annealing is carried out at a temperature of 850-1000°C for 1.5-2 hours. After application of the middle layer, its surface plastic deformation is carried out when heated in the martensitic transformation temperature range by up to 2-5% of the layer thickness. Mechanic activation of powders and high-speed gas-flame spraying are carried out in a protective atmosphere.

EFFECT: increasing the strength characteristics and wear resistance of composite coatings using materials with shape memory effect.

4 cl, 1 ex, 1 tbl