METHOD FOR OBTAINING MULTILAYER COMPOSITE BASED ON NIOBIUM AND ALUMINIUM USING COMBINED MECHANICAL PROCESSING Russian patent published in 2014 - IPC B22F3/02 C22C1/04 B22F1/00 

FIELD: metallurgy.

SUBSTANCE: mixture of niobium and aluminium powders with fineness of not less than 98% and fraction of aluminium of 1.5 to 45 wt % is subject to mechanical processing in a planetary ball mill at amplification of balls of 100 to 600 m/s² with duration of 0.5 to 20 minutes. Compaction by twisting under quasi-hydrostatic pressure on Bridgman anvils is performed at the temperature of 10 to 100°C, pressure of 2 to 10 GPa and relative turn of anvils at twisting till shear deformation γ≥50 is achieved.

EFFECT: obtained composite with a layered structure is characterised by a nanoscale size of grains and layers, increased hardness and large specific surface area of interphase boundaries.

3 dwg, 1 ex