Mixed powder deposition of components for wear, erosion and abrasion resistant applications

This invention relates in general to the field of materials technology and more specifically to the field of abrasive coatings for high temperature applications. In particular, the present invention pertains to an abrasive coating and a process for depositing that coating on component parts of a turbine combustion engine where the hard particles are co-deposited with a matrix material by means of a cold spraying process. Together, the hard particles and matrix material form an abrasive coating that provides a protective layer for the component parts so they are wear, erosion and abrasion resistant when used in high temperature environments such as a gas turbine. An abrasive coating and a process for forming the abrasive coating by co-depositing hard particles within a matrix material onto a substrate using a cold spray process. The cold sprayed combination of hard particles and matrix material provides a coating that is wear, erosion and oxidation resistant. The abrasive coating may have different compositions across its depth. The hard particles may be deposited at different densities across the thickness of the matrix material. A first layer of the abrasive coating proximate the surface of the substrate may be devoid of hard particles.