Patent ID: 8636194

Claim:
A friction stir tool comprising: a non-consumable body formed from material capable of resisting deformation when subject to frictional heating and compressive loading; a throat with an internal shape defining a passageway that is a through hole with a tubular throat surface extending lengthwise through the non-consumable body, wherein the tubular throat surface is attached to and imposes dependent co-rotation of a consumable coating material about a central axis of the consumable coating material and by lengthwise engagement between the consumable coating material and the tubular throat surface, during rotation of the non-consumable body; whereby the non-consumable body is operably configured for imposing frictional heating and compressive loading of the consumable coating material against a substrate, and comprises a surface for trapping the consumable coating material in a volume between the non-consumable body and a substrate, and for forming and shearing a surface of the coating on the substrate.