US Patent 7807098 Advanced erosion-corrosion resistant boride cermets

The invention is related to a method for protecting a metal surface subject to erosion temperatures up to 850° C. The method comprises providing the metal surface with a cermet composition represented by the formula (PQ)(RS) comprising: a ceramic phase (PQ) and binder phase (RS) wherein,P is at least one metal selected from the group consisting of Group IV, Group V, and Group VI elements,Q is boride,R is selected from the group consisting of Fe, Ni, Co, Mn and mixtures thereof,S comprises Ti and at least one element selected from the group consisting of Cr, Al, Si and Y.