Patent ID: 8530050

Claim:
A wear-resistant component of a carbon seal, the component comprising: a surface; and a coating applied onto the surface, wherein the coating is formed of a chromium carbide-nickel chromium composition constituting between about 75% and about 85% by weight chromium carbide and between about 15% and about 25% by weight nickel chromium, the coating also comprising a substantially and predominantly lamellar splat structure with a plurality of isolated regions of cuboidal carbide phases, wherein the cuboidal carbide phases consist essentially of a discrete mixture of cuboidal Cr3C2 carbides, substantially lamellar precipitated matrix carbides of the form CrxCy where x=7 to 23 and y=3 to 6, fine lamellar nickel oxides, and a fine lamellar Ni—Cr binder; wherein the chromium carbide-nickel chromium coating has a maximum porosity of approximately 3%; wherein the chromium carbide-nickel chromium coating has a nominal oxide level of between about 10% and about 20%; wherein the chromium carbide-nickel chromium coating has a microhardness of between about 850 Vickers Hardness and about 1150 Vickers Hardness; and wherein the chromium carbide-nickel chromium composition is applied onto the surface by high velocity oxy-fuel spraying (HVOF).