NICKEL-ALUMINUM-BASE INTERMETALLIC ALLOY Russian patent published in 2000 - IPC

FIELD: metallurgy. SUBSTANCE: intermetallic alloy based on nickel-aluminum contains mainly NiAl phase and also chromium and tantalum with total fraction up to 12 at.%. At option, alloy may additionally contain at least one element from group including iron, molybdenum, tungsten, niobium and hafnium with corresponding fraction up to 1 at.% and in total not in excess of 3 at.% Allow is used as material for manufacture of articles. The material possesses 0.2% tensile strength of above 600 MPa at room temperature, and above 200 MPa at 800 C, and above 90 MPa at 1000 C, viscosity K_k of at least 7 MPa, resistance to oxidation in order of 5•10¹⁴ g²cm^-4 and good resistance to thermal shocks. EFFECT: higher efficiency. 11 cl, 5 tbl