Container of refractory metal

Patent metadata

Field	Value
Publication number	US-10730111-B2
Application number	US-201615741620-A
Country	US
Kind code	B2
Filing date	Jun 16, 2016
Priority date	Jul 3, 2015
Publication date	Aug 4, 2020
Grant date	Aug 4, 2020

Abstract

A container includes at least two interconnected parts which are connected to one another at least in some regions by a thermally sprayed layer. At least one part is formed of a refractory metal or a refractory metal alloy. The container makes it possible to provide great variety, both with regard to form and dimensions of the container, which is impermeable to ceramic melts even under high operating temperatures. A method for producing a container is also provided.

First claim

The invention claimed is:

1. A container, comprising:
at least two parts connected to one another;
at least one of said parts being formed of a refractory metal or a refractory metal alloy with a refractory metal content >80 wt. %; and
a thermally sprayed layer connecting said at least two parts to one another at least in some regions to form the container.

2. The container according to claim 1 , wherein said sprayed layer forms a connection with at least one of said parts, said connection having at least one principle of action selected from the group consisting of metallurgical bonding and form-locking engagement.

3. The container according to claim 1 , wherein said sprayed layer is formed as a seam.

4. The container according to claim 3 , wherein said seam is U-shaped or V-shaped.

5. The container according to claim 1 , wherein said at least two parts at least in some regions are fixed relative to one another or connected to one another by at least one of form-locking, force-locking or metallurgical bonding.

6. The container according to claim 1 , wherein said at least two parts are fixed relative to one another or connected to one another by a pin connection, a tongue-and-groove connection or caulking.

7. The container according to claim 1 , wherein said refractory metal is molybdenum or tungsten.

8. The container according to claim 1 , wherein said sprayed layer is a plasma-sprayed layer.

9. The container according to claim 1 , wherein said sprayed layer is formed of a refractory metal.

10. The container according to claim 1 , wherein the container is a round container.

11. The container according to claim 10 , wherein said at least two parts of the round container include at least two hollow cylinder segments and at least one bottom part.

12. The container according to claim 1 , wherein the container is a rectangular container.

13. The container according to claim 12 , wherein said at least two parts of the rectangular container include at least two side parts and at least one U-shaped or plate-shaped bottom part.

14. The container according to claim 1 , which further comprises a container inside, a container outside, and an impermeable layer disposed on at least one of said container inside or said container outside.

15. The container according to claim 14 , wherein at least one of said sprayed layer or said impermeable layer is impermeable to a ceramic melt.

16. A method for producing a container, the method comprising the following steps:
producing at least two parts, at least one of the parts being formed of a refractory metal or a refractory metal alloy with a refractory metal content >80 wt. %;
applying a thermally sprayed layer to the at least two parts at least in some regions; and
using the sprayed layer at least in some regions to connect the at least two parts in a metallurgically bonded or form-locking manner to form the container.

17. The method according to claim 16 , which further comprises carrying out the step of producing the at least two parts by using at least one production step selected from the group consisting of powder pressing, sintering, hot isostatic pressing and forming.

18. The method according to claim 16 , which further comprises machining the parts to permit the parts to be fixed relative to one another or connected to one another by at least one of form-locking, force-locking or metallurgically bonding at least in some regions.

19. The method according to claim 16 , which further comprises machining the parts to permit the parts to be connected by a thermally sprayed seam of the sprayed layer.

20. The method according to claim 16 , which further comprises carrying out the step of applying the thermally sprayed layer to connect the parts by using a thermal spraying method selected from the group consisting of plasma spraying, electric-arc spraying, flame spraying, detonation spraying, cold-gas spraying and laser spraying.

21. The method according to claim 16 , which further comprises carrying out the step of connecting the parts by vacuum plasma spraying.

22. The method according to claim 16 , which further comprises sealing the container by action of a slurry.

23. The method according to claim 22 , which further comprises annealing the container after the sealing step.

24. A method for melting aluminum oxide, the method comprising the following steps:
producing a container by:
producing at least two parts, at least one of the parts being formed of a refractory metal or a refractory metal alloy with a refractory metal content >80 wt. %,
applying a thermally sprayed layer to the at least two parts at least in some regions, and
using the sprayed layer at least in some regions to connect the at least two parts in a metallurgically bonded or form-locking manner to form the container; and
using the container to melt aluminum oxide.

Assignees

• Plansee Se

Inventors

• Sprenger Dietmar
• Lang Bernhard
• Kathrein Martin

Classifications

• B22D41/00

  Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like (B22D39/00, B22D43/00 take precedence) · CPC title

• C30B35/002

  Crucibles or containers · CPC title

• C30B29/20

  Aluminium oxides · CPC title

• C23C4/08

  containing only metal elements (C23C4/073 takes precedence) · CPC title

• C23C24/04

  Impact or kinetic deposition of particles · CPC title