Patent ID: 8741185

Claim:
A composite material of formula (C—N—B-MR) x (Al-MR) y (R) z in which: Al, C, N and B represent aluminum, carbon, nitrogen, and boron, respectively; MR is one or more refractory metals of the series IV, V or VI of the periodic table; C—N—B-MR is one or more carbides, nitrides or borides of the above-mentioned refractory metal(s); Al-MR is one or more aluminides of the refractory metal(s) mentioned above, it being understood that: if MR=Nb, Ta, Hf, Zr, Ti, V then Al-MR=Al 3 MR; if MR=W, Cr then Al-MR=Al 4 MR; if MR=Mo, then Al-MR=Al 8 Mo 3 or Al 17 Mo 4 (−Al 4 Mo) R is a residual component other than carbon comprising one or more phases from Al 4 C 3 , AlN, AlB 2 , Al 1-67 B 22 and MR t Al u (C—N—B) v where t, u and v are numbers greater than or equal to zero, and x, y, z are the volume fractions of the respective components with x>y; x+y>0.5; x+y+z=1 and 0.01<y<0.5, with the reservation that, when C—N—B-MR is TiB 2 , then Al-MR is not Al 3 Ti.