HEATPROOF COMPOSITION POWDER ALLOY ON BASIS OF INTERMETALLIC SEMICONDUCTOR NiAl AND METHOD OF ITS RECEIVING Russian patent published in 2009 - IPC C22C1/05 C22C19/03 

FIELD: metallurgy.

SUBSTANCE: invention relates to powder metallurgy, particularly to receiving of alloys on the basis of strengthen by oxides alloyed intermetallic semiconductor NiAl. It can be used in aviation and automobile industry, shipbuilding for manufacturing of high-beat parts of gas turbine engine. Composite material consists of 2-2.8 vol. % of strengthening phase Y₂O₃ and matrix, containing, wt %: aluminium 26.8-29.2; cobalt 8.5-12.2; niobium 2.2-3.6; chrome 2.0-3.9; nickel 53.5-58.2. Powder of matrix alloy and strengthening phase are mixed with simultaneous grinding of alloy powder up to size less than 10 micrometres. Mixture is extruded in capsule at temperature 1100-1200°C with elongation ratio more than 15, and annealed at temperature higher 0.8 T_f of matrix alloy with temperature gradient by length of extruded blank.

EFFECT: obtaining material, which allows high durability at 1100 °C and durability at 1200-1400 °C at satisfactory fracture toughness at low temperatures.

9 cl, 3 tbl, 1 ex