Systems, methods, and products for creating gas atomized metal matrix composite-based feedstock for cold spray background

Patent metadata

Field	Value
Publication number	US-11980944-B2
Application number	US-202318297271-A
Country	US
Kind code	B2
Filing date	Apr 7, 2023
Priority date	Nov 27, 2019
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

Implementations provide gas atomized metal matrix composite (“GAMMC”)-based feedstock for cold spray additive manufacturing (“CSAM”) enabling complex structural repairs. The feedstock is prepared by arranging a metal matrix composite (MMC) material in a gas atomization system, wherein the MMC material includes metal particles and ceramic particles. The feedstock is further prepared by performing gas atomization of the MMC material using the gas atomization system to atomize the MMC material, and producing a feedstock powder comprised of metal particles that are embedded with the ceramic particles from the atomized MMC material. The GAMMC-based feedstock comprises metallic (for binding to the substrate of the damaged part) and ceramic (for reinforcement) particles bonded together such that the ceramic particles bond directly to and within the metallic particles. GAMMC-based feedstock strengthens the repaired part and prevents degradation of the mechanical properties of the repaired part below stock specifications.

First claim

What is claimed is:

1. A gas atomization system for producing a feedstock powder for cold spraying, comprising:
an intake sub-system configured to receive a metal matrix composite (MMC) material, the MMC material comprising metal particles and ceramic particles;
an atomizer sub-system configured to conduct gas atomization of the MMC material, the atomizer sub-system comprising:
a heating unit configured to heat the MMC material to a temperature for gas atomization;
a pressurization unit configured to apply a gas stream at a gas pressure for gas atomization;
a flow regulation unit configured to maintain a metal flow rate for gas atomization; and
the gas atomization comprising:
atomizing the MMC material at the gas pressure and the metal flow rate, while maintaining the temperature of the MMC material; and
producing the feedstock powder comprised of the metal particles that are embedded with the ceramic particles from the atomized MMC material.

2. The system of claim 1 , wherein:
the temperature is in a range of a melting temperature of the MMC material to the melting temperature of the MMC material plus 300 degrees Celsius;
the gas pressure is in a range of 10-30 bars; and
the metal flow rate is in a range of 0.2-2 kilograms per minute.

3. The system of claim 1 , wherein the MMC material is a bar stock of decorated metal powder that has been consolidated;
the bar stock of decorated metal powder having an at least one ceramic particle on an outside surface of an at least one metal particle thereof.

4. The system of claim 3 , wherein the ceramic particles comprise at least one of nanoparticles or microparticles of at least one of aluminum oxide or titanium diboride.

5. The system of claim 1 , further comprising an output sub-system configured to output the feedstock powder to a cold spray system in a secondary consolidation step.

6. The system of claim 5 , wherein the cold spray system gas atomizes the supplied feedstock powder.

7. The system of claim 1 , wherein the gas atomization comprises at least one of a non-cold spray gas atomizing process or a cold spray gas atomizing process.

8. A feedstock for cold spraying prepared by a process comprising:
arranging a metal matrix composite (MMC) material in a gas atomization system, the MMC material comprising metal particles and ceramic particles;
performing gas atomization of the MMC material using the gas atomization system to atomize the MMC material; and
producing a feedstock powder comprised of metal particles that are embedded with the ceramic particles from the atomized MMC material.

9. The feedstock of claim 8 , wherein the MMC material is a bar stock of decorated metal powder that has been consolidated; the bar stock of decorated metal powder having an at least one ceramic particle on an outside surface of an at least one metal particle thereof.

10. The feedstock of claim 9 , wherein the ceramic particles comprise at least one of nanoparticles or microparticles of at least one of aluminum oxide or titanium diboride.

11. The feedstock of claim 8 , wherein performing the gas atomization further comprises atomizing the MMC material at a gas pressure in a range of 10-30 bars and a metal flow rate in a range of 0.2-2 kilograms per minute, wherein the MMC material is at a temperature in a range from the melting temperature of the MMC material to the melting temperature of the MMC material plus 300 degrees Celsius.

12. The feedstock of claim 8 , wherein the gas atomization comprises at least one of a non-cold spray gas atomizing process or a cold spray gas atomizing process.

13. The feedstock of claim 8 , wherein use of the feedstock in cold spraying-based repair of a part improves mechanical properties of the repaired part.

14. A feedstock powder for cold spraying prepared by a process via a gas atomization system, the process comprising:
receiving, via an intake sub-system, a metal matrix composite (MMC) material, the MMC material comprising metal particles and ceramic particles;
conducting, via an atomizer sub-system, gas atomization of the MMC material, the atomizer sub-system comprising:
heating, via a heating unit of the atomizer sub-system, the MMC material to a temperature for gas atomization;
applying, via a pressurization unit of the atomizer sub-system, a gas stream at a gas pressure for gas atomization;
maintaining, via a flow regulation unit of the atomizer sub-system, a metal flow rate for gas atomization;
the gas atomization comprising:
atomizing the MMC material at the gas pressure and the metal flow rate, while maintaining the temperature of the MMC material; and
producing the feedstock powder comprised of the metal particles that are embedded with the ceramic particles from the atomized MMC material.

15. The feedstock powder of claim 14 , wherein:
the temperature is in a range of a melting temperature of the MMC material to the melting temperature of the MMC material plus 300 degrees Celsius;
the gas pressure is in a range of 10-30 bars; and
the metal flow rate is in a range of 0.2-2 kilograms per minute.

16. The feedstock powder of claim 14 , wherein the MMC material is a bar stock of decorated metal powder that has been consolidated;
the bar stock of decorated metal powder having an at least one ceramic particle on an outside surface of an at least one metal particle thereof.

17. The feedstock powder of claim 16 , wherein the ceramic particles comprise at least one of nanoparticles or microparticles of at least one of aluminum oxide or titanium diboride.

18. The feedstock powder of claim 14 , further comprising:
outputting, via an output sub-system, the feedstock powder to a cold spray system in a secondary consolidation step.

19. The feedstock powder of claim 18 , wherein the cold spray system gas atomizes the supplied feedstock powder.

20. The feedstock powder of claim 14 , wherein the gas atomization comprises at least one of a non-cold spray gas atomizing process or a cold spray gas atomizing process.

Assignees

• Boeing Co

Inventors

• Senderos Bruno Zamorano
• Yousefiani Ali
• Nicholas Michael B
• Rodriguez Rogie I

Classifications

• B22F9/082 Primary

  atomising using a fluid (using centrifugal force B22F9/10) · CPC title

• C22C1/051

  Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor · CPC title

• B22F2302/05

  Boride · CPC title

• B22F2302/253

  Aluminum oxide (Al2O3) · CPC title

• Y02P10/25

  Process efficiency · CPC title