METHOD FOR SPUTTERING OF COATING TO PRODUCT FROM NATURAL STONE OR FROM METAL MATERIAL, AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2013 - IPC C23C24/04 B05B7/14 B44C3/02 B82B1/00 

FIELD: metallurgy.

SUBSTANCE: formation of a supersonic gas powder flow, its acceleration in a supersonic nozzle and transfer to the product surface is performed. Gas-powder flow includes powder particles with degree of fineness in the range of 0.03-200 mcm. After acceleration at the nozzle outlet the gas powder flow is additionally subject to impact mechanical activation at collision with a partially screening barrier so that powder particles with size of 0.03-4.99 mcm are sputtered to the treated surface of the product without collision with the screening barrier, and powder particles with size of 5-200 mcm prior to sputtering of the coating to the treated surface collide with the partially screening barrier and are crushed in addition. The process is performed layer by layer at room temperature or the temperature corresponding to viscous brittle transition of material of particles. The partially screening barrier is made in the form of a pointed body representing a cone, a wedge or a pyramid from material of the row of sputtered powders chemically passive to the material, which is installed with an acute angle in the direction to the nozzle section so that its side surface is located at an angle α of not more than 15° to the nozzle axis. Surface area of a midsection of the barrier is specified smaller than the cross sectional area of the nozzle section.

EFFECT: reduction of temperature and force action on products at performance of preservation and restoration works; improvement of quality of coatings, including corrosion resistance, adhesion and cohesion strength and reduction of power consumption at implementation of the method.

12 cl, 5 dwg, 4 ex