Preceramic polymer for ceramic including metal boride

Patent metadata

Field	Value
Publication number	US-2016236987-A1
Application number	US-201415028951-A
Country	US
Kind code	A1
Filing date	Oct 2, 2014
Priority date	Oct 15, 2013
Publication date	Aug 18, 2016
Grant date	—

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; 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 starting preceramic polymer is selected from the group consisting of polysilazane, polysilane, polysiloxane and combinations thereof.

10 . 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.

11 . 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.

12 . The composition as recited in claim 11 , wherein the silicon-containing backbone chain is selected from the group consisting of polysilazane, polysilane, polysiloxane and combinations thereof.

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

14 . The composition as recited in claim 11 , wherein the metal of the metal moiety is selected from the group consisting of refractory metals.

15 . The composition as recited in claim 14 , wherein the refractory metal is titanium.

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

17 . The composition as recited in claim 11 , wherein the boron moiety and the metal moiety are bonded off of silicon atoms in the silicon-containing backbone chain.

18 . A ceramic article comprising:
a non-boride ceramic phase; and a plurality of metal-boron bond regions molecularly dispersed through the non-boride ceramic phase.

19 . The article as recited in claim 18 , wherein the metal is selected from the group consisting of refractory metals.

20 . The article as recited in claim 18 , wherein the metal is selected from the group consisting of titanium, zirconium and combinations thereof.

Assignees

• United Technologies Corp

Inventors

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

Classifications

• C04B35/6325

  based on organo-metallic compounds · CPC title

• C04B35/58021 Primary

  based on titanium carbonitrides · CPC title

• C04B2235/441

  Alkoxides, e.g. methoxide, tert-butoxide · CPC title

• C04B2235/80

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

• C04B2235/486

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