Patent ID: 8790078
Filing Date: 2014-07-29
Classification: C23C,F01D,Y02T

Abstract:
1. An abrasive coating for a rotor shaft, the abrasive coating comprising: a metal bond coat layer on the rotor shaft; and an abrasive layer overlying the bond layer for contact with vanes during operation of the rotor shaft, the abrasive layer including a plurality of grit particles at least partially embedded in a yttria stabilized zirconia or gadolinia-zirconate matrix and wherein the grit particles are coated with at least one of nickel, MCrAl, MCrAlY and a refractory modified MCrAlY, where M is nickel, iron, cobalt or mixtures thereof, prior to placement in the yttria stabilized zirconia or gadolina-zirconate matrix.