Refractory crucibles and molds for containing reactive molten metals and salts
First Claim
1. 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.
2 Assignments
0 Petitions
Accused Products
Abstract
Refractory ceramics and composite materials consisting of nitrides, mixed nitrides and oxides, and oxynitrides of Group IV metals Hf, Zr, Ti, and Group III metals Sc, Y, and lanthanides La through Lu, are used to form refractory articles, or as coatings for refractory articles. These materials and articles have high resistance to molten metals, molten salts, erosion, and high temperature corrosive environments, and can be engineered to have desirable thermal and electrical properties. In particular the articles are crucibles, molds, containment vessels, and spray nozzles, and most particularly these articles are made of or coated with the Hf compounds.
33 Citations
20 Claims
-
1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- a nitride, mixed nitride and oxide, or oxynitride of a Group III metal selected from Sc, Y, and the lanthanides La through Lu; and
- 10. 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 hafnium nitride, the hafnium nitride having a thickness of at least about 25 micrometers.
-
19. 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, Zr, and Ti, having a thickness of at least about 25 micrometers;
- 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.
- View Dependent Claims (20)
Specification