METHOD FOR ION-PLASMA APPLICATION OF WEAR AND CORROSION RESISTANT COATING ON ITEMS OF ALUMINUM ALLOYS Russian patent published in 2017 - IPC C23C28/02 C23C14/02 C23C14/16 C23C14/35 

FIELD: metallurgy.

SUBSTANCE: invention relates to the method for ion-plasma application of wear and corrosion resistant coating on items of aluminum alloys. The surface is cleaned with argon ions in the glow discharge plasma at the discharge voltage up to 700 V, the power of 1.5 kW and the operating pressure of 1 Pa for 10 minutes. The intermediate layer is sequentially applied in the form of a multilayer coating of 3-5 layers of titanium oxide of nanoscale thickness in the vacuum chamber by magnetron sputtering of the titanium target cathode at the discharge voltage of 300 V and the power of 1.5 kW, in the atmosphere of the argon and oxygen mixture at the operating pressure of 0.5 Pa. Each layer of titanium oxide is applied during 1.0 min. Between applying the layers, the item is kept in the air atmosphere during 1.0 minutes. The base titanium nitride layer of the thickness of 1-5 microns is applied in the vacuum chamber by magnetron sputtering of titanium target cathode at the discharge voltage of 300 V and the power of 1.5 kW in the atmosphere of the argon and nitrogen mixture at the operating pressure of 0.5 Pa during 60-120 min. The item temperature is 90-200°C. After applying the coating, the item is cooled in the argon medium to reach room temperature.

EFFECT: invention allows to process the items of aluminum alloys at low temperatures of up to 200°C, and enhances the hardness, wear resistance and corrosion resistance of the items.

3 dwg, 1 tbl, 1 ex