Fabricating metal or ceramic components using 3D printing with dissolvable supports of a different material

Patent metadata

Field	Value
Publication number	US-11673289-B2
Application number	US-201715998839-A
Country	US
Kind code	B2
Filing date	Feb 16, 2017
Priority date	Feb 16, 2016
Publication date	Jun 13, 2023
Grant date	Jun 13, 2023

Abstract

Methods and systems are described for fabricating a component using 3D printing. A 3D printed piece is created including a body of the component, a support structure, and a first sacrificial interface region coupling the body of the component to the support structure. The body of the component is formed of a first metal or ceramic material and the first sacrificial interface region is formed at least partially of a second metal or ceramic material. The body of the component is then separated from the support structure by applying a chemical or electrochemical dissolution process to the 3D printed piece. Because the second metal or ceramic material is less resistant to the dissolution process than the first metal or ceramic material, the first sacrificial interface region at least partially dissolves, thereby separating the body of the metal component from the support structure, without dissolving the body of the component.

First claim

What is claimed is:

1. A method of fabricating a component, the method comprising:
creating a 3D printed piece using a 3D printer, the 3D printed piece including a body of the component, a support structure, and a first sacrificial interface region coupling the body of the component to the support structure,
the body of the component being formed of a first metal or ceramic material, and
the first sacrificial interface region being formed at least partially of a second metal or ceramic material; and

separating the body of the component from the support structure by applying a chemical or electrochemical dissolution process to the 3D printed piece, wherein the second metal or ceramic material is less resistant to the chemical or electrochemical dissolution process than the first metal or ceramic material,
wherein the body of the component is formed solely of the first metal or ceramic material.

2. The method of claim 1 , wherein creating the 3D printed piece includes creating the 3D printed piece including the support structure formed of the first metal or ceramic material.

3. The method of claim 1 , wherein the second metal or ceramic material has a lower redox potential than the first metal or ceramic material, and
wherein separating the body of the component from the support structure by applying the chemical or electrochemical dissolution process includes placing the 3D printed piece in an electrochemical etching bath with an anode set at a potential between the redox potential of the first metal or ceramic material and the redox potential of the second metal or ceramic material.

4. The method of claim 1 , wherein creating the 3D printed piece including the body of the component being formed of the first metal or ceramic material and the first sacrificial interface region being formed of the second metal or ceramic material includes
forming the body of the component of titanium, and
forming the first sacrificial interface region of nickel.

5. The method of claim 1 , wherein creating the 3D printed piece including the first sacrificial interface region being formed at least partially of the second metal or ceramic material includes forming the first sacrificial interface region formed entirely of the second metal or ceramic material.

6. The method of claim 1 , wherein creating the 3D printed piece including the first sacrificial interface region being formed at least partially of the second metal or ceramic material includes forming the first sacrificial interface region including the second metal or ceramic material dispersively deposited within the first metal or ceramic material.

7. The method of claim 1 , wherein creating the 3D printed piece including the first sacrificial interface region being formed at least partially of the second metal or ceramic material includes forming the first sacrificial interface region including the second metal or ceramic material gradiently deposited within the first metal or ceramic material.

8. The method of claim 1 , wherein creating the 3D printed piece including the first sacrificial interface region being formed at least partially of the second metal or ceramic material includes forming the first sacrificial interface region structured with a cross-section formed partially of the first metal or ceramic material and partially of the second metal or ceramic material.

9. The method of claim 8 , wherein separating the body of the component from the support structure by applying the chemical or electrochemical dissolution process includes dissolving the second metal or ceramic material from the first sacrificial interface region using a first chemical or electrochemical dissolution process and dissolving the first metal or ceramic material from the first sacrificial interface region using a second chemical or electrochemical dissolution process.

10. The method of claim 8 , wherein separating the body of the component from the support structure by applying the chemical or electrochemical dissolution process includes dissolving the second metal or ceramic material from the first sacrificial interface region using the chemical or electrochemical dissolution process and applying a machining process to the first metal or ceramic material of the first sacrificial interface region to complete the separation of the body of the component from the support structure.

11. The method of claim 1 , wherein creating the 3D printed piece includes creating the 3D printed piece to include a spacer region between the body of the component and the first sacrificial interface region, and further comprising applying a machining or polishing process to remove the spacer region from the body of the component after separating the body of the component from the support structure.

12. The method of claim 1 , further comprising applying an additive to the 3D printed piece, wherein the additive protects the first metal or ceramic material from the chemical or electrochemical dissolution process.

13. The method of claim 1 , further comprising applying an additive to the 3D printed piece, wherein the additive makes the second metal or ceramic material more susceptible to the chemical or electrochemical dissolution process.

14. The method of claim 1 , wherein creating the 3D printed piece includes creating the 3D printed piece to include the support structure formed of the second metal or ceramic material.

15. The method of claim 1 , wherein creating the 3D printed piece further includes creating the 3D printed piece that further includes a second sacrificial interface region coupling the body of the component to the support structure,
wherein the second sacrificial interface region is formed of a third metal or ceramic material, and
wherein the third metal or ceramic material is more resistant to the dissolution process than the second metal or ceramic material and less resistant to the dissolution process than the first metal or ceramic material so that the chemical or electrochemical dissolution process separates the body of the component from the support structure at the first sacrificial interface region before separating the body of the component from the support structure at the second sacrificial interface region.

16. The method of claim 1 , wherein creating the 3D printed piece further includes providing an interface material between the body of the component and the first sacrificial interface region.

17. The method of claim 16 , wherein the body of the component is formed of an aluminum material, wherein the first sacrificial interface region is formed of a silicon oxide material, and wherein the interface material between the body of the component and the first sacrificial interface region is formed of titanium.

18. The method of claim 1 , wherein creating the 3D printed piece includes
forming the body of the component using silicon carbide, and
forming the first sacrificial interface regions using silicon oxide.

19. A method of fabricating a component, the method comprising:
creating a 3D printed piece using a 3D printer, the 3D printed piece including a body of the component, a support structure, and a first sacrificial interface region coupling the body of the component to the support structure,
the body of the component being formed of a first metal or ceramic material, and
the first sacrificial interface region being formed at least partially of a second metal or ceramic material; and

separating the body of the component from the support structure by applying a chemical or electrochemical dissolution pro

Assignees

• Univ Arizona State
• Penn State Res Found

Inventors

• Hildreth Owen
• Nassar Abdalla
• Simpson Timothy W

Classifications

• B22F2301/052

  Aluminium · CPC title

• B22F2301/15

  Nickel or cobalt · CPC title

• B22F2999/00

  Aspects linked to processes or compositions used in powder metallurgy · CPC title

• C04B2235/6026

  Computer aided shaping, e.g. rapid prototyping · CPC title

• B22F2302/105

  Silicium carbide (SiC) · CPC title