Patent ID: 7807098
Filing Date: 2010-10-05
Classification: C22C,C23C,Y10T

Abstract:
1. A method for protecting a metal surface subject to erosion at temperatures up to 850° C., the method comprising providing the metal surface with a cermet composition represented by the formula (PQ)(RS) comprising: a ceramic phase (PQ) and a binder phase (RS) wherein, P is at least one transition metal element selected from the group consisting of Group IV, Group V, and Group VI elements, Q is boride, R comprises at least about 66.7 wt % Fe based on the weight of the binder phase (RS) and a metal selected from the group consisting of Ni, Co, Mn and mixtures thereof, S comprises Ti in the range of 0.1 to 3.0 wt % based on the weight of the hinder phase (RS), and at least one element selected from the group consisting of Cr, Al, Si and Y, wherein the ceramic phase (PQ) ranges from about 55 to 95 vol % based on the volume of the cermet, and wherein said ceramic phase (PQ) is dispersed in the binder phase (RS) as platelets wherein the aspect ratio of length to thickness of the platelets is in the range of about 5:1 to 20:1.