FIELD: chemistry.
SUBSTANCE: present invention relates to a scratch-resistant layer which includes an oxidised intermetallic layer deposited on a surface which is in contact with air. The scratch resistant layer usually has thickness equal to 1-3 nm, and does not absorb light after oxidation. This layer is initially applied in preliminary non-oxidised and non-nitrided form. Complete oxidation of the metal layer, metal alloy, metal compound or intermetallic layer takes place after exposure to air for several days The scratch resistant layer is oxidised by treating with a layer of plasma, electric discharge or ion beam containing a reactive gas such as oxygen or nitrogen.
EFFECT: obtaining a protective layer having hardness and longevity.
17 cl, 3 dwg, 2 tbl
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