METHOD OF MODIFICATION OF SURFACE LAYER OF ALUMINIUM, COPPER AND NICKEL Russian patent published in 2008 - IPC C22F1/04 C22F1/08 C22F1/10 C23C14/48 

FIELD: metallurgy.

SUBSTANCE: invention refers to radiation beam technologies of material modification, particularly to the method of modification of a surface layer of aluminium or copper, or nickel. A thermo mechanical impact to the surface of samples is performed with a powerful ion beam (PIB) of a nano second duration. The beam composed of 30%C⁺ and 70% H⁺ with energy of 300 KeV (kiloelectronvolt) and current density of 50-150 A/cm² is directed along normal to the sample surface. Irradiation is carried out with three impulses of 50 PIB nc duration. Irradiation with PIB results in processes of re-crystallisation, over crystallisation and fragmentation, thus achieving upgraded micro hardness in the direction of a maximum pole density of created textures <111> in aluminium for 40% (from 250 MPa to 350 MPa), in copper for 17% (from 725 MPa to 875 MPa) and in nickel for 5% ( from 1477 MPa to 1551 MPa).

EFFECT: upgraded micro hardness in the direction a maximum pole density of created textures.

5 cl, 3 dwg