A method of producing a surface coating upon a substrate.

摘要

A method of forming a layer of a nitrogenous alloy upon a substrate body including the operation of depositing upon the substrate particles of a powder including an alloy containing a nitride-forming material and a thermally decomposable nitrogen donor material and heating the particles to a temperature such that the nitrogen donor dissociates to provide free nitrogen which reacts with the nitride former and the particles fuse to form a layer of a nitrogenous alloy upon the substrate.