Patent ID: 7288132

Claim:
A cermet composition represented by the formula (PQ)(RS)FG where (PQ) is a ceramic phase; (RS) is a binder phase; F is an intermetallic dispersoid; and G is reprecipitate phase; and where (PQ), F, and G are dispersed in (RS), the composition comprising: (a) about 30 vol % to 95 vol % of (PQ) ceramic phase, at least 50 vol % of said ceramic phase is a carbide of a metal selected from the group consisting of Si, Ti, Zr, Hf, V, Nb, Ta, Mo and mixtures thereof, wherein (PQ) comprises particles having a core of a carbide of only one metal and a shell of mixed carbides of Nb, Mo and the metal of the core; (b) about 0.1 vol % to about 10 vol % of G reprecipitate phase, based on the total volume of the cermet composition, of a metal carbide M x C y where M is Cr, Fe, Ni, Co, Si, Ti, Zr, Hf, V, Nb, Ta, Mo or mixtures thereof; C is carbon, and x and y are whole or fractional numerical values with x ranging from 1 to about 30 and y from 1 to about 6; (c) about 0.02 wt % to about 5 wt % of intermetallic dispersoids, F; and (d) the remainder volume percent comprises a binder phase, (RS), where R is a metal selected from the group consisting of Fe, Ni, Co, Mn and mixtures thereof, and S, based on the total weight of the binder, comprises at least 12 wt % Cr and up to about 35 wt % of an element selected from the group consisting of Al, Si, Y, and mixtures thereof.