METHOD OF PRODUCING ANTICORROSION COATING ON ARTICLES FROM MONOLITHIC TITANIUM NICKELIDE Russian patent published in 2020 - IPC C23C14/46 C23C14/58 C23C14/32 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, specifically to protective coatings for medical implants of titanium nickelide and can be used in making endoprostheses with longer service life. Method of producing anticorrosive coating on articles from monolithic titanium nickelide involves depositing a number of protective layers of submicron thickness by ion-plasma sputtering. Coating is formed in two stages; at the first stage, three alternating layers of titanium, nickel and titanium are successively applied to the article by ion-plasma sputtering, and at the second stage, the article is heated to temperature sufficient for initiation of self-propagating high-temperature synthesis reaction process. Thickness of applied layers is selected in range of 0.4–0.6 mcm, wherein layers are applied at pressure from 0.05 to 0.1 Pa. Heating temperature is selected in range of 800–900 °C, and heating time is selected within 20–40 s. Heating is performed in air medium or in special gas medium.

EFFECT: technical result of the invention is simplification of the procedure for formation of anticorrosive coating and increase of strength of coating connection with the base.

1 cl, 1 ex, 2 dwg