METHOD FOR PRODUCING ANTIFRICTION ALUMINIUM MATRIX COMPOSITE MATERIAL Russian patent published in 2023 - IPC C22C1/05 B22F3/16 

FIELD: powder metallurgy.

SUBSTANCE: invention is related in particular to production of antifriction alumina-matrix dispersion-strengthened composite materials, and can be used to obtain elements operating in various tribocouplings under dry friction conditions. First, nickel aluminide (Al₃Ni) is synthesized in vacuum using the method of self-propagating high-temperature synthesis (SHS) from a mixture of PAP-2 and carbonyl nickel powders by heating to a temperature of 580-600°C. Then the SHS product with a particle size of 10^-2-10^-1 mcm is mixed with a matrix aluminum powder in an amount of 30-40 wt.% and machining is carried out in a planetary mill. The resulting mixture is pressed under a pressure of 500-700 MPa to manufacture powder blanks and then heat-treated in vacuum at 640-650°C, for 40-60 min. Then the resulting blank is compacted by pressing under a pressure of 750-900 MPa and sintered in vacuum at 630-640°C, for 30-60 min.

EFFECT: increased wear resistance and reduced friction-sliding coefficient while maintaining high strength.

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