METHOD FOR OBTAINING COMPOSITE MATERIALS Russian patent published in 2022 - IPC B22F3/14 B22F3/23 

FIELD: composite materials.

SUBSTANCE: invention relates to the production of powder composite materials. A method for producing composite materials consisting of a base in the form of sintered particles of spongy titanium bounded by the inner walls of open pores and a surface ceramic layer includes pressing the charge, sintering the charge to obtain a porous molding and high-temperature electric discharge synthesis of the ceramic layer initiated by a flowing low-voltage pulse current. At the same time, before pressing, the charge is prepared by mixing spongy titanium powders with aluminum and niobium powders, and the charge is pressed in a dielectric matrix at a pressure that ensures electrical contact of the charge with electrodes-punches connected to a high-voltage discharge source. Sintering of the charge to obtain a porous molding is carried out by a pulsed current of a high-voltage discharge. High-temperature electric discharge synthesis of the ceramic layer is carried out in a nitrogen-oxygen gas mixture. A low-voltage pulsed current is passed until the transition of high-temperature electric discharge synthesis into a state of self-propagating high-temperature synthesis.

EFFECT: invention provides a reduction in energy consumption in the production of composite materials, an increase in strength, gas-absorbing properties, heat resistance and resistance to high-temperature corrosion, chemical activity of applied metal catalysts.

1 cl, 2 tbl, 1 ex