Patent ID: 6604941
Filing Date: 2003-08-12
Classification: B22C,C04B,C23C,Y10T

Abstract:
An article of manufacture comprising a molten metal processing or molten salt processing article selected from a refractory crucible, mold, containment vessel, or molten metal spray nozzle, wherein the article further comprises a shaped body having at least a molten metal contacting and resistant or molten salt contacting and resistant layer formed of a refractory material selected from a nitride, mixed nitride and oxide, or oxynitride of a Group IV metal selected from Hf and Zr; a nitride, mixed nitride and oxide, or oxynitride of a Group III metal selected from Sc, Y, and the lanthanides La through Lu; and combinations or reaction products of a nitride, mixed nitride and oxide, or oxynitride of a Group IV metal selected from Hf, Zr, and Ti, and a nitride, mixed nitride and oxide, or oxynitride of a Group III metal selected from Sc, Y, and the lanthanides La through Lu.