Method of treating a preceramic material

Patent metadata

Field	Value
Publication number	US-9745226-B2
Application number	US-201514863635-A
Country	US
Kind code	B2
Filing date	Sep 24, 2015
Priority date	Jan 18, 2012
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A method of treating a preceramic material includes providing a preceramic polycarbosilane or polycarbosiloxane material that includes a moiety Si—O-M, where Si is silicon, O is oxygen and M is at least one metal that includes at least one transition metal, and thermally converting the preceramic polycarbosilane or polycarbosiloxane that includes the moiety Si—O-M material into a ceramic material.

First claim

What is claimed is:

1. A method of treating a preceramic material, the method comprising:
providing a preceramic polycarbosilane or polycarbosiloxane material that includes a moiety Si—O-M, where Si is silicon, O is oxygen and M comprises at least one metal that includes at least one transition metal selected from the group consisting of titanium, zirconium, hafnium, vanadium, chromium and combinations thereof and a refractory metal selected from the group consisting of niobium, tantalum, molybdenum, tungsten, rhenium and combinations thereof; and
thermally converting the preceramic polycarbosilane or polycarbosiloxane that includes the moiety Si—O-M material into a ceramic material.

2. The method as recited in claim 1 , wherein thermally converting the preceramic polycarbosilane or polycarbosiloxane material produces a ceramic material having a composition SiO x M z C y , wherein x<2, y>0 and z<1 and x and z are non-zero.

3. The method as recited in claim 1 , wherein the at least one metal further includes a rare earth metal selected from the group consisting of scandium, ytterbium, gadolinium, yttrium, lanthanum, neodymium, dysprosium, lutetium and combinations thereof.

4. The method as recited in claim 1 , wherein the at least one metal further includes aluminum.

5. The method as recited in claim 1 , wherein the at least one transition metal is selected from the group consisting of hafnium, vanadium, chromium and combinations thereof.

6. The method as recited in claim 1 , wherein the ceramic material from the thermal converting includes 0.5-20 at. % of the at least one metal.

7. The method as recited in claim 1 , wherein the ceramic material from the thermal converting includes 1-10 at. % of the at least one metal.

8. The method as recited in claim 1 , further comprising crushing the ceramic material from the thermal converting to produce a particulate material.

9. The method as recited in claim 8 , further comprising thermally treating the particulate material in an inert environment.

10. The method as recited in claim 8 , further comprising thermally treating the particulate material in an oxidizing environment.

11. A method of treating a preceramic material, the method comprising:
providing a preceramic polycarbosilane or polycarbosiloxane material that includes a moiety Si—O-M, where Si is silicon, O is oxygen and M comprises at least one metal that includes aluminum and at least one transition metal selected from the group consisting of titanium, zirconium, hafnium, vanadium, chromium and combinations thereof; and
thermally converting the preceramic polycarbosilane or polycarbosiloxane that includes the moiety Si—O-M material into a ceramic material.

12. A method of treating a preceramic material, the method comprising:
providing a preceramic polycarbosilane or polycarbosiloxane material that includes a moiety Si—O-M, where Si is silicon, O is oxygen and M is at least one metal that includes at least one transition metal;
thermally converting the preceramic polycarbosilane or polycarbosiloxane that includes the moiety Si—O-M material into a ceramic material;
crushing the ceramic material from the thermal converting to produce a particulate material; and
thermally treating the particulate material in an oxidizing environment.

13. The method as recited in claim 12 , wherein the at least one metal includes a transition metal selected from the group consisting of titanium, zirconium, hafnium, vanadium, chromium and combinations thereof.

14. The method as recited in claim 13 , wherein the at least one metal includes a refractory metal selected from the group consisting of niobium, tantalum, molybdenum, tungsten, rhenium and combinations thereof.

Assignees

• United Technologies Corp

Inventors

• Schmidt Wayde R

Classifications

• C04B2235/3224

  Rare earth oxide or oxide forming salts thereof, e.g. scandium oxide · CPC title

• C04B35/5603

  with a well-defined oxygen content, e.g. oxycarbides · CPC title

• C08G77/58

  Metal-containing linkages · CPC title

• C04B35/013

  containing carbon (C04B35/103 takes precedence) · CPC title

• C04B2235/3217

  Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina · CPC title