Ceramic support structure

Patent metadata

Field	Value
Publication number	US-2018339426-A1
Application number	US-201816057171-A
Country	US
Kind code	A1
Filing date	Aug 7, 2018
Priority date	Mar 14, 2013
Publication date	Nov 29, 2018
Grant date	—

Abstract

A pre-ceramic support structure for additive manufacturing, that upon thermal processing, is soluble in various solvents.

First claim

What is claimed is:

1 . A composition comprising an additive manufacturing feedstock having a polymeric matrix and a pre-ceramic material, wherein the pre-ceramic material is removable in a solvent.

2 . A composition according to claim 1 , wherein the polymeric matrix is one or more of polyolefins, polylactic acid polymers, and acrylonitrile butadiene styrene polymers or combinations thereof.

3 . A composition according to claim 1 . wherein the pre-ceramic material is calcium carbonate, sodium carbonate, sodium aluminate or combinations thereof.

4 . A composition according to claim 1 . further comprising one or more of a fluxing material, a polymer processing additive or combinations thereof.

5 . A composition according to claim 4 , wherein the fluxing material includes glass frits having boron trioxide. silicon oxide, zirconium dioxide, lithium oxide, fluorine, titanium dioxide, and combinations thereof.

6 . A composition according to claim 1 . wherein the solvent includes water, carbonated solutions, and acidic solutions.

7 . A composition according to claim 1 . wherein the additive manufacturing feedstock is suitable as a support structure.

8 . A composition comprising a feedstock for additive manufacturing, wherein the feedstock is a polymeric matrix and a pre-ceramic material, the pre-ceramic material upon thermal processing is removable in a solvent.

9 . A method comprising producing an article by additive manufacturing using a feedstock of a polymeric matrix and a pre-ceramic material, wherein the pre-ceramic material post-sintering is removable in a solvent.

10 . A method comprising creating a green article with additive manufacturing wherein the green article has a build layer supported by a support layer derived from a polymeric matrix and a pre-ceramic material, wherein the pre-ceramic material is removable in a solvent.

11 . A method according to claim 10 , further comprising firing the green article.

12 . A method according to claim 11 , further comprising removing the support layer by a solvent.

13 . A method according to claim 11 . wherein the solvent includes water, carbonated solutions, and acidic solutions.

14 . An article comprising a filament for additive manufacturing wherein the filament is a polymeric matrix and a pre-ceramic material, wherein the pre-ceramic material is removable in a solvent.

15 . An article comprising a green ceramic article wherein the green ceramic article is supported by a support composition of a polymeric matrix and a pre-ceramic material, wherein the pre-ceramic material is removable in a solvent.

Assignees

• Stratasys Inc

Inventors

• Demuth Benjamin A
• Pawloski Adam R

Classifications

• D01F1/02

  Addition of substances to the spinning solution or to the melt (addition of substances to viscose D01F2/08) · CPC title

• C04B2235/3232

  Titanium oxides or titanates, e.g. rutile or anatase · CPC title

• C04B38/04

  by dissolving-out added substances · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• C04B2235/3244

  Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof · CPC title