# US 10,865,467 B2 · Molybdenum-silicon-boron alloy and method for producing same, and component

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- Number: US 10,865,467 B2
- Document ID: US10865467B2
- Status: Granted
- Kind: B2
- Application number: 15/573,398
- Filed: 2016-04-27
- Published: 2018-05-17
- Granted: 2020-12-15
- Earliest claimed: 2015-05-26
- Assignees: Siemens Aktiengesellschaft
- Applicants: Siemens Aktiengesellschaft
- Inventors: Michael Ott; Sebastian Piegert
- Web page: https://patentgrep.com/patent/US10865467B2

## CPC

- C22C 27/04: Alloys based on tungsten or molybdenum
- B22F 10/28: Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
- B22F 10/36: of energy beam parameters
- Y02P 10/25: Process efficiency
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- B22F: WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER (making alloys by powder metallurgy C22C); APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The use of a specific molybdenum-silicon-boron alloy and a particular production process in which powder is used makes it possible to achieve components which have a particular fiber-matrix structure and can be used for high-temperature applications and can also be produced inexpensively.

## Claims

### Claim 1

An alloy comprising a composition Mo-(x)Si-(y)B-(z)Zr, wherein:
x=13 at % to 18 at %,
y=8 at % to 12 at %, and
z=0.5 at % to 2 at %.

### Claim 2 (depends on 1)

An alloy consisting essentially of the composition as claimed in claim 1.

### Claim 3 (depends on 1)

The alloy as claimed in claim 1, consisting essentially of Mo, Si, B and Zr and formed by a selective laser melting process such that the alloy comprises a fiber-matrix structure in which individual phases are present as a Moss/Mo5SiB2/Mo3Si structure.

### Claim 4 (depends on 1)

A component comprising the alloy as claimed in claim 1, wherein the alloy further comprises a fiber-matrix structure formed by an energy beam melting process.

### Claim 5 (depends on 1)

A process for producing a component composed of the alloy of claim 1, the process comprising applying powder comprising Mo, Si, B and Zr with a selective energy beam melting process.

### Claim 6 (depends on 5)

The process as claimed in claim 5, wherein at least 80%, of particles of the powder have respective sizes in a range from 10 μm to 60 μm.

### Claim 7 (depends on 5)

The process as claimed in claim 5, wherein the powder has been gas-atomized or milled.

### Claim 8 (depends on 5)

The process as claimed in claim 5, wherein the selective energy beam melting process is controlled to achieve a temperature gradient effective to form a fiber-matrix structure.

### Claim 9 (depends on 8)

A component formed by the process of claim 8.

### Claim 10 (depends on 8)

The process of claim 8, further comprising controlling the selective energy beam melting process to achieve a temperature gradient effective to form the fiber-matrix structure in which individual phases are present as Moss/Mo5SiB2/Mo3Si.

### Claim 11 (depends on 10)

A component formed by the process of claim 10.

### Claim 12 (depends on 8)

The process of claim 8, wherein a scanning speed between the powder and a laser energy beam is between 400 mm/s and 2000 mm/s.

### Claim 13 (depends on 12)

The process of claim 12, wherein the scanning speed is between 1000 mm/s and 1500 mm/s.

### Claim 14 (depends on 8)

The process of claim 8, wherein the selective energy beam melting process utilizes a laser energy beam power of from 80 W to 250 W.

### Claim 15 (depends on 14)

The process of claim 14, wherein the selective energy beam melting process utilizes a laser energy beam power of from 100 W to 170 W.