COATING ON ARTICLES APPLYING METHOD IN VACUUM CHAMBER Russian patent published in 2007 - IPC C23C14/35 C23C14/16 

FIELD: processes for applying coatings by magnetron spraying, possibly application of coatings onto different articles of steels, hard alloys and refractory materials.

SUBSTANCE: method comprises steps of placing article in vacuum chamber, heating vacuum chamber and supplying oxygen into it; before spraying process creating in vacuum chamber evacuation with degree no more than 10^-3Pa. Heating is realized till temperature no less than 100°C. Articles placed in vacuum chamber are subjected to ion cleaning after heating vacuum chamber and before starting material spraying. Ion cleaning is realized successively separately by oxygen and by argon for 5 - 15 min. Time period for ion cleaning by means of oxygen is no less than 2 min. Magnetron spraying is realized at rate no less than 6 micrometer/h; silver is used as material for spraying.

EFFECT: improved strength and density of coatings, enhanced adhesion of coatings, increased useful life period of coatings in condition of high temperature, possibility for applying coatings of purified materials with low content of impurities.

9 cl, 1 dwg