Preceramic polymer for ceramic including metal boride

Patent metadata

Field	Value
Publication number	US-9890088-B2
Application number	US-201415028951-A
Country	US
Kind code	B2
Filing date	Oct 2, 2014
Priority date	Oct 15, 2013
Publication date	Feb 13, 2018
Grant date	Feb 13, 2018

Abstract

Disclosed is a method of fabricating a preceramic polymer for making a ceramic material including a metal boride. The method includes providing a starting preceramic polymer that includes a silicon-containing backbone chain and first and second reactive side groups extending off of the silicon-containing backbone chain, reacting a boron-containing material with the first reactive side group to bond a boron moiety to the silicon-containing backbone chain, and reacting a metal-containing material with the second reactive side group to bond a metal moiety to the silicon-containing backbone chain such that the preceramic polymer includes the boron moiety and the metal moiety extending as side groups off of the silicon-containing backbone chain. Also disclosed is a preceramic polymer composition and a metal-boride-containing ceramic article fabricated from the preceramic polymer.

First claim

What is claimed is:

1. A method of fabricating a preceramic polymer for making a ceramic material including a metal boride, the method comprising:
providing a starting preceramic polymer that includes a silicon-containing backbone chain and first and second reactive side groups extending off of the silicon-containing backbone chain;
reacting a boron-containing material with the first reactive side group to bond a boron moiety to the silicon-containing backbone chain, wherein the starting preceramic polymer is selected from the group consisting of polysilazane, polysilane, polysiloxane and combinations thereof; and
reacting a metal-containing material with the second reactive side group to bond a metal moiety to the silicon-containing backbone chain such that the preceramic polymer includes the boron moiety and the metal moiety extending as side groups off of the silicon-containing backbone chain.

2. The method as recited in claim 1 , wherein the boron-containing material is a borate compound.

3. The method as recited in claim 1 , wherein the metal of the metal-containing material is a refractory metal.

4. The method as recited in claim 3 , wherein the metal of the metal-containing material is selected from the group consisting of refractory metals.

5. The method as recited in claim 4 , wherein the refractory metal is titanium.

6. The method as recited in claim 4 , wherein the refractory metal is zirconium.

7. The method as recited in claim 1 , wherein the boron-containing material is a borate compound and the metal-containing material is a metal alkoxide.

8. The method as recited in claim 1 , wherein the first reactive side group is a N—H moiety and the second reactive side groups is a Si—H moiety.

9. The method as recited in claim 1 , wherein the boron moiety and the metal moiety are bonded off of silicon atoms in the silicon-containing backbone chain.

10. A preceramic polymer composition comprising:
a silicon-containing backbone chain including a boron moiety and a metal moiety extending as side groups off of the silicon-containing backbone chain, wherein the silicon-containing backbone chain is selected from the group consisting of polysilazane, polysilane, polysiloxane and combinations thereof.

11. The composition as recited in claim 10 , wherein the boron moiety is a borate compound.

12. The composition as recited in claim 10 , wherein the metal of the metal moiety is selected from the group consisting of refractory metals.

13. The composition as recited in claim 12 , wherein the refractory metal is titanium.

14. The composition as recited in claim 12 , wherein the refractory metal is zirconium.

15. The composition as recited in claim 10 , wherein the boron moiety and the metal moiety are bonded off of silicon atoms in the silicon-containing backbone chain.

Assignees

• United Technologies Corp

Inventors

• Berczik Douglas M
• Kmetz Michael A
• Suib Steve Lawrence
• Reutenauer Justin
• Coons Timothy

Classifications

• C04B2235/486

  Boron containing organic compounds, e.g. borazine, borane or boranyl · CPC title

• C04B2235/80

  Phases present in the sintered or melt-cast ceramic products other than the main phase · CPC title

• C04B35/6267

  Pyrolysis, carbonisation or auto-combustion reactions · CPC title

• C04B35/58021 Primary

  based on titanium carbonitrides · CPC title

• C04B35/58071

  based on titanium borides · CPC title