METHOD OF PRODUCING ULTRATHIN SHEETS OF POROUS METALS AND ALLOYS Russian patent published in 2024 - IPC B22F3/11 B22F7/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to methods of producing porous metals, in particular to methods of producing ultrathin sheets from nickel and nickel-cobalt alloy, used to create electrodes with a large specific surface area, which significantly increases efficiency of discharge, in microelectronics for electric wiring, cases of microcircuits, in connections, etc., when creating porous filters, which are used for filtering gases. Invention can be used in catalytic chemistry for synthesis of carbon nanostructures, including carbon nanotubes, as catalysts for obtaining intermediate compounds and end products of organic synthesis with high added value. Method of producing ultrathin sheets of porous metals and alloys involves preparing a saturated aqueous solution of nickel and/or cobalt formate, applying obtained solution on chemically cleaned silicon plates, placing them in a quartz retort, then into an electric furnace, where plates with applied solution are blown with argon and heat treated in flow of hydrogen at their heating to final temperature in range of 600–700 °C, heating is stopped for 20 minutes at temperature of 100 °C and for 5–15 minutes at a decomposition temperature of nickel and/or cobalt formate, in addition, saturated aqueous solutions of nickel and cobalt formate are prepared and used and mixed to obtain an alloy in molar ratio of 1:1 or thermal treatment is carried out with vacuum pumping of quartz retort with silicon plates to vacuum less than 1.3 Pa, and also preparing and using a saturated aqueous solution of nickel and cobalt formate and mixing them to obtain an alloy in molar ratio of 1:1.

EFFECT: invention increases porosity of the laminar material by reducing its thickness to values less than 1,000 nm (1 mcm).

4 cl, 8 dwg, 5 tbl