Methods of three-dimensional electrophoretic deposition for ceramic and cermet applications and systems thereof

Patent metadata

Field	Value
Publication number	US-11718924-B2
Application number	US-201916505431-A
Country	US
Kind code	B2
Filing date	Jul 8, 2019
Priority date	Apr 13, 2010
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

A method for forming a ceramic according to one embodiment includes electrophoretically depositing a plurality of layers of particles of a non-cubic material. The particles of the deposited non-cubic material are oriented in a common direction.

First claim

What is claimed is:

1. A method for forming a ceramic, the method comprising:
electrophoretically depositing a plurality of layers comprising particles of a non-cubic material, wherein longitudinal lengths of the particles are oriented in a common direction.

2. The method for forming a ceramic as recited in claim 1 , wherein the plurality of layers are deposited above a non-planar electrode.

3. The method for forming a ceramic as recited in claim 1 , comprising:
providing an electrophoretic deposition (EPD) device comprising:
an EPD chamber;
a first electrode positioned at an end of the EPD chamber; and
a second electrode positioned at an opposite end of the EPD chamber;

providing the particles to the EPD chamber;
applying a voltage difference across the first electrode and the second electrode; and
electrophoretically depositing the particles above the first electrode to form the layers.

4. The method for forming a ceramic as recited in claim 3 , wherein the plurality of layers include a first layer having a first composition, a first microstructure, and a first density; and a second layer having a second composition, a second microstructure, and a second density, wherein at least one of the following provisos is satisfied:
the first and second compositions are different;
the first and second microstructures are different; and
the first and second densities are different.

5. The method for forming a ceramic as recited in claim 4 , wherein the second composition, the second microstructure, and the second density are each different than the first composition, the first microstructure, and the first density.

6. The method for forming a ceramic as recited in claim 4 , wherein a gradient exists between a first of the layers and a second of the layers, the gradient being a transition from the first composition, the first microstructure, and/or the first density, to the second composition, the second microstructure, and/or the second density.

7. The method for forming a ceramic as recited in claim 6 , wherein the gradient from the first layer to the second layer is abrupt.

8. The method for forming a ceramic as recited in claim 6 , wherein the gradient from the first layer to the second layer is gradual.

9. The method for forming a ceramic as recited in claim 4 , wherein the first and second compositions are the same.

10. The method for forming a ceramic as recited in claim 4 , wherein the first and second microstructures are the same.

11. The method for forming a ceramic as recited in claim 4 , wherein the first and second densities are the same.

12. The method for forming a ceramic as recited in claim 3 , comprising:
providing light in a first pattern to a photoconductive layer positioned near the first electrode, wherein the first electrode is transparent or semi-transparent and the photoconductive layer is between the first electrode and the second electrode,
wherein portions of the photoconductive layer become conductive in response to the light according to the first pattern, and
wherein some of the particles are electrophoretically deposited above the photoconductive layer according to the first pattern.

13. The method for forming a ceramic as recited in claim 12 , comprising:
providing light in a second pattern to the photoconductive layer,
wherein portions of the photoconductive layer become conductive in response to the light according to the second pattern,
wherein the particles are electrophoretically deposited above the photoconductive layer according to the second pattern, and
wherein the first and second patterns direct deposition of the particles to form a gradient in composition, microstructure and/or density in an x-y plane oriented parallel to a plane of the photoconductive layer.

14. The method for forming a ceramic as recited in claim 13 , wherein the first pattern and/or the second pattern are dynamically altered to modify a gradient in composition, microstructure and/or density in a z-direction across the plurality of layers, wherein the z-direction is perpendicular to the x-y plane.

15. The method for forming a ceramic as recited in claim 3 , wherein the first electrode has a non-planar shape.

16. The method for forming a ceramic as recited in claim 1 , comprising applying an alternating current (AC) electric field in a direction parallel to a plane of deposition of the plurality of layers.

17. The method for forming a ceramic as recited in claim 1 , comprising sintering the plurality of layers to form a ceramic, wherein the non-cubic material is selected such that the ceramic is transparent.

18. A method for forming a ceramic, the method comprising:
electrophoretically depositing a plurality of layers comprising particles of a non-cubic material, wherein the particles are oriented in a common direction; and
applying an alternating current (AC) electric field in a direction parallel to a plane of deposition of the plurality of layers.

19. A method for forming a ceramic, the method comprising:
electrophoretically depositing a plurality of layers comprising particles of a non-cubic material, wherein the particles are oriented in a common direction; and
sintering the plurality of layers to form a ceramic, wherein the non-cubic material is selected such that the ceramic is transparent.

Assignees

• L Livermore Nat Security Llc

Inventors

• Rose Klint Aaron
• Kuntz Joshua D
• Worsley Marcus A

Classifications

• C25D13/02 Primary

  with inorganic material · CPC title

• B32B15/00

  Layered products comprising {a layer of} metal · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• C04B37/001

  directly with other burned ceramic articles · CPC title

• C04B37/025

  consisting of glass or ceramic material · CPC title