Erosion resistant hard composite materials

摘要

A hard composite composition comprising: a binder; and a polymodal blend of matrix powder, wherein the polymodal blend of matrix powder has at least one first local maxima at a particle size of about 0.5 nm to about 30 microns, at least one second local maxima at a particle size of about 200 microns to about 10 mm, and at least one local minima between a particle size of about 30 microns to about 200 microns that has a value that is less than the first local maxima.