# US 11,306,375 B2 · Molded article made of a molybdenum-aluminum-titanium alloy

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,306,375 B2
- Document ID: US11306375B2
- Status: Granted
- Kind: B2
- Application number: 16/796,284
- Filed: 2020-02-20
- Published: 2020-08-27
- Granted: 2022-04-19
- Earliest claimed: 2019-02-26
- Assignees: Deutschland GmbH & Co. KG
- Applicants: Heraeus Deutschland GmbH & Co. KG
- Inventors: Stephan Herbst; Bernd Spaniol
- Web page: https://patentgrep.com/patent/US11306375B2

## CPC

- C22C 27/04: Alloys based on tungsten or molybdenum
- C22C 1/02: by melting {(C22C1/1036 takes precedence)}
- C30B 15/10: Crucibles or containers for supporting the melt
- C30B 35/002: {Crucibles or containers}
- F27B 14/10: Crucibles
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- C30B: SINGLE-CRYSTAL GROWTH (by using ultra-high pressure, e.g. for the formation of diamonds, B01J3/06); UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL (zone-refining of metals or alloys C22B); PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE (casting of metals, casting of other substances by the same processes or devices B22D; working of plastics B29; modifying the physical structure of metals or alloys C21D, C22F); SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE (for producing semiconductor devices or parts thereof H10); APPARATUS THEREFOR
- F27B: FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS

## Abstract

The invention relates to a molded article made of a metallic molybdenum-based alloy with at least 3 wt. % up to a maximum of 8 wt. % aluminum, at least 3 wt. % up to a maximum of 6 wt. % titanium and, as the remainder, molybdenum including the usual impurities, wherein the molded article is produced directly or indirectly by means of solidification from a melt. The invention also relates to a method for producing a molded article and to the use of such a molded article.

## Claims

### Claim 1

A molded article consisting of a metallic molybdenum-based alloy, the metallic molybdenum-based alloy consisting of at least 4 wt. % up to a maximum of 8 wt. % aluminum, at least 3 wt. % up to a maximum of 6 wt. % titanium and, as the remainder, molybdenum and impurities associated therewith, wherein the molded article is produced by solidifying a melt in a casting mold.

### Claim 2 (depends on 1)

The molded article of claim 1, wherein the impurities are a maximum of 1 at % of the molybdenum-based alloy.

### Claim 3 (depends on 1)

The molded article of claim 1, wherein the impurities comprise one or more of the elements zirconium, carbon, hafnium, lanthanum, yttrium, cerium, copper, rhenium, niobium, tantalum and tungsten.

### Claim 4 (depends on 1)

The molded article of claim 1, wherein the molybdenum-based alloy has 5.3±0.5 wt. % aluminum and 4.7±0.5 wt. % titanium.

### Claim 5 (depends on 1)

The molded article of claim 1, wherein the molded article is a crucible, a rod, a rod having a point for use as a crystal nucleus for crystal growing, a sheet, a plate, a pipe, a heating coil or a heater rod.

### Claim 6 (depends on 1)

The molded article of claim 1, wherein the molded article has a cylindrical outer wall at least in certain areas.

### Claim 7 (depends on 1)

The molded article of claim 1, wherein the molded article contains 86 to 92 wt. % molybdenum.

### Claim 8 (depends on 1)

The molded article of claim 1, wherein the molded article contains 4 to 6 wt. % aluminum.

### Claim 9 (depends on 1)

The molded article of claim 1, wherein the molded article contains at least 4 wt. % up to a maximum of 6 wt. % titanium.

### Claim 10

A method for producing a molded article from a molybdenum-based alloy consisting of 4 wt. % to 8 wt. % aluminum, 3 wt. % to 6 wt. % titanium and, as the remainder, molybdenum and impurities associated therewith, the method comprising the following chronologically successive steps:
A) producing a melt consisting of 4 wt. % to 8 wt. % aluminum, 3 wt. % to 6 wt. % titanium and, as the remainder, molybdenum and impurities associated therewith,
B) pouring the melt into a casting mold and solidifying the melt in the casting mold to form a molded article in the casting mold, and
C) releasing the molded article thus obtained from the casting mold.

### Claim 11 (depends on 10)

The method of claim 10, wherein the molded article obtained from the casting mold contains 86 to 92 wt. % molybdenum.

### Claim 12 (depends on 10)

The method of claim 10, wherein, in step A), the melt is melted from pure metals of molybdenum, aluminum and titanium, and the impurities associated therewith, wherein the impurities are present in an amount of less than 1 at %.

### Claim 13 (depends on 10)

The method of claim 10, further comprising:
D) reshaping the molded article,
wherein step D) is performed after step C).

### Claim 14 (depends on 1)

The molded article of claim 1, the molded article capable of replacing an iridium material.

### Claim 15 (depends on 10)

A molded article formed by the method of claim 10, the molded article capable of replacing an iridium material.

### Claim 16 (depends on 13)

The method of claim 13, wherein reshaping comprises one or more of deburring, cutting, rolling, drawing, polishing and milling.

### Claim 17 (depends on 1)

The molded article of claim 1, wherein the melt consists of aluminum, titanium, molybdenum and the associated impurities.

### Claim 18

A molded article consisting of a metallic molybdenum-based alloy, the metallic molybdenum-based alloy consisting of at least 4 wt. % up to a maximum of 8 wt. % aluminum, at least 3 wt. % up to a maximum of 6 wt. % titanium and, as the remainder, molybdenum and impurities associated therewith, wherein
the molded article is a crucible, a rod, a rod having a point for use as a crystal nucleus for crystal growing, a sheet, a plate, a pipe, a heating coil or a heater rod; and
the molded article is produced directly or indirectly by means of solidification from a melt.

### Claim 19 (depends on 18)

The molded article of claim 18, wherein the impurities are a maximum of 1 at % of the molybdenum-based alloy.

### Claim 20 (depends on 18)

The molded article of claim 18, wherein the impurities comprise one or more of the elements zirconium, carbon, hafnium, lanthanum, yttrium, cerium, copper, rhenium, niobium, tantalum and tungsten.

### Claim 21 (depends on 18)

The molded article of claim 18, wherein the molybdenum-based alloy has 5.3±0.5 wt. % aluminum and 4.7±0.5 wt. % titanium.

### Claim 22 (depends on 18)

The molded article of claim 18, wherein the molded article is produced by a mold casting.

### Claim 23 (depends on 18)

The molded article of claim 18, wherein the molded article contains 86 to 92 wt. % molybdenum.

### Claim 24 (depends on 18)

The molded article of claim 18, wherein the molded article contains 4 to 6 wt. % aluminum.

### Claim 25 (depends on 18)

The molded article of claim 18, wherein the molded article contains at least 4 wt. % up to a maximum of 6 wt % titanium.