Fabricating ceramic structures

Patent metadata

Field	Value
Publication number	US-11787117-B2
Application number	US-202016856433-A
Country	US
Kind code	B2
Filing date	Apr 23, 2020
Priority date	Apr 23, 2020
Publication date	Oct 17, 2023
Grant date	Oct 17, 2023

Abstract

A fabrication apparatus for fabricating ceramic structures of controlled size and composition is provided. The fabrication apparatus includes an additive manufacturing machine configured to dispense preceramic materials in a printed pattern, the printed pattern corresponding to the ceramic structures of the controlled size and composition, a radiation emitter configured to emit curing radiation toward the printed pattern to cure the preceramic materials and a lamp element configured to shine light on the preceramic materials to convert the preceramic materials to ceramics.

First claim

What is claimed is:

1. A method of fabricating ceramic structures of controlled size and composition, the method comprising:
printing a pattern of uncured preceramic materials;
curing the pattern; and
converting the preceramic to ceramic in about 1 second or less by intense pulsed light (IPL) processing,
wherein the printing comprises electrohydrodynamic (EHD) deposition.

2. The method according to claim 1 , wherein the pattern comprises features having sizes of about 10 microns or less.

3. The method according to claim 1 , wherein the preceramic materials comprise resins with or without fillers, the resins comprising at least one or more of polysilanes, polysiloxanes, polycarbosilanes, polysilazanes, polycarbosiloxanes, polycarbosilazanes, polyborosiloxanes, and metal-modified derivatives thereof and the fillers comprise at least one or more of carbides, nitrides, borides, phosphides, carbonitrides, oxides, glasses, glass-ceramics, or metals, the metals comprising aluminum, copper, silicon, titanium, vanadium, chromium, iron, cobalt, nickel, zinc, hafnium, zirconium, yttrium, lanthanum, ytterbium, gadolinium, niobium, tantalum, boron, tungsten, rhenium, molybdenum, gold, silver, platinum, and palladium.

4. The method according to claim 1 , further comprising heating the pattern.

5. The method according to claim 1 , wherein the curing comprises exposing the pattern to radiation.

6. The method according to claim 1 , further comprising post-processing the ceramic.

7. The method according to claim 6 , wherein the post-processing of the ceramic comprises applying a coating.

8. A method of fabricating ceramic structures of controlled size and composition, the method comprising:
printing a pattern of uncured preceramic materials with features having sizes on the order of about 10 microns or less;
radiating curing radiation toward the pattern to cure the pattern; and
exposing the cured pattern to intense pulsed light (IPL) to convert the preceramic of the cured pattern to ceramic in about 1 second or less by IPL processing,
wherein the printing comprises electrohydrodynamic (EHD) deposition.

9. The method according to claim 8 , wherein the preceramic materials comprise resins with or without fillers, the resins comprising at least one or more of polysilanes, polysiloxanes, polycarbosilanes, polysilazanes, polycarbosiloxanes, polycarbosilazanes, polyborosiloxanes and metal-modified derivatives thereof and the fillers comprise at least one or more of carbides, nitrides, borides, phosphides, carbonitrides, oxides, glasses, glass-ceramics, or metals, the metals comprising aluminum, copper, silicon, titanium, vanadium, chromium, iron, cobalt, nickel, zinc, hafnium, zirconium, yttrium, lanthanum, ytterbium, gadolinium, niobium, tantalum, boron, tungsten, rhenium, molybdenum, gold, silver, platinum, and palladium.

10. The method according to claim 8 , further comprising:
heating the pattern; and
applying a coating to the ceramic.

Assignees

• Rtx Corp

Inventors

• Schmidt Wayde R
• Sheedy Paul
• Sharon John A
• Magdefrau Neal

Classifications

• B29C64/291 Primary

  for operating globally, e.g. together with selectively applied activators or inhibitors · CPC title

• B29C64/30

  Auxiliary operations or equipment · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• B33Y30/00

  Apparatus for additive manufacturing; Details thereof or accessories therefor · CPC title

• C04B35/64

  Burning or sintering processes (C04B33/32 takes precedence {; powder metallurgy B22F}) · CPC title