METHOD OF COATING A BODY, GRANULES FOR THE METHOD AND METHOD OF MAKING GRANULES

摘要

A method and granules for coating a body. Each granule comprises silicon (Si), carbon (C), chromium (Cr) and iron group metal selected from iron (Fe), cobalt (Co) and nickel (Ni). The relative quantities of the Si, C and Cr are such that a molten phase comprising the Si, C, Cr and the iron group metal will form at a melting temperature of less than 1,300 degrees Celsius when at least a threshold quantity of the iron group metal is accessible to the Si, C and Cr; but each granule comprising substantially less than the threshold quantity of the iron group metal. A second source of the iron group metal is provided. A combination of the granules and the second source is formed such that at least the threshold quantity of the iron group metal will be accessible to the Si, C and Cr. The granules and the second source are heated to at least the melting temperature to form the molten phase in contact with the body. The heat is then removed to allow the molten phase to solidify and to provide the coated body.

主权项

1. A method of coating a body, the method including:
providing a plurality of granules, each granule comprising silicon (Si), carbon (C), chromium (Cr) and iron group metal selected from iron (Fe), cobalt (Co) and nickel (Ni); in which the relative quantities of the Si, C and Cr are such that a molten phase comprising the Si, C, Cr and the iron group metal will form at a melting temperature of less than 1,300 degrees Celsius when at least a threshold quantity of the iron group metal is accessible to the Si, C and Cr; each granule comprising substantially less than the threshold quantity of the iron group metal; providing at least a second source of the iron group metal; forming a combination of the granules and the second source such that at least the threshold quantity of the iron group metal will be accessible to the Si, C and Cr; heating the granules and the second source to at least the melting temperature to form the molten phase in contact with the body; and removing the heat to allow the molten phase to solidify and to provide the coated body.