Patent ID: 8875976

Claim:
A friction-based fabrication tool comprising: a non-consumable body with a throat; a screw-type auger disposed in the throat for continuously delivering solid coating material through the throat of the tool body; wherein the friction-based fabrication tool is operably configured for rotating the non-consumable tool body at a desired first velocity and for rotating the screw-type auger at a desired second velocity; wherein the non-consumable tool body comprises a surface for trapping coating material loaded on a substrate in a volume between the non-consumable tool body and the substrate and for forming and shearing a surface of a coating on the substrate with frictional heating and shear loading; wherein the screw-type auger comprises threads and a shaft, and wherein the threads extend from the shaft a distance of less than a radius of the shaft; and wherein the non-consumable body has no pin configured to rotate on an axis of rotation of the non-consumable body.