Method for pyrolyzing preceramic polymer material using electromagnetic radiation

Patent metadata

Field	Value
Publication number	US-2016251267-A1
Application number	US-201415028517-A
Country	US
Kind code	A1
Filing date	Sep 30, 2014
Priority date	Oct 14, 2013
Publication date	Sep 1, 2016
Grant date	—

Abstract

Disclosed is a method for fabricating a ceramic material from a preceramic polymer material. The method includes providing a preceramic polymer material that has a preceramic polymer and an electromagnetic radiation-responsive component. The electromagnetic radiation-responsive component is selected from boron-containing compounds, cobalt, titanium, zirconium, hafnium, tantalum, tungsten, rhenium, nitrides of aluminum, nitrides of titanium, nitrides of zirconium, nitrides of hafnium, nitrides of tantalum, nitrides of tungsten, nitrides of rhenium, carbides of aluminum, carbides of titanium, carbides of zirconium, carbides of hafnium, carbides of tantalum, carbides of tungsten, carbides of rhenium and combinations thereof. An electromagnetic radiation is applied to the preceramic polymer material. The electromagnetic radiation interacts with the electromagnetic radiation-responsive component to generate heat that converts the preceramic polymer to a ceramic material

First claim

What is claimed is:

1 . A method for fabricating a ceramic material from a preceramic polymer material, the method comprising:
providing a preceramic polymer material that includes a preceramic polymer and an electromagnetic radiation-responsive component, the electromagnetic radiation-responsive component selected from the group consisting of boron-containing compounds, cobalt, titanium, zirconium, hafnium, tantalum, tungsten, rhenium, nitrides of aluminum, nitrides of titanium, nitrides of zirconium, nitrides of hafnium, nitrides of tantalum, nitrides of tungsten, nitrides of rhenium, carbides of aluminum, carbides of titanium, carbides of zirconium, carbides of hafnium, carbides of tantalum, carbides of tungsten, carbides of rhenium and combinations thereof; and applying electromagnetic radiation to the preceramic polymer material, the electromagnetic radiation interacting with the electromagnetic radiation-responsive component to generate heat that converts the preceramic polymer to a ceramic phase.

2 . The method as recited in claim 1 , wherein the electromagnetic radiation-responsive component is the boron-containing compound.

3 . The method as recited in claim 2 , wherein the boron-containing compound includes boron carbide.

4 . The method as recited in claim 1 , wherein the electromagnetic radiation-responsive component is the cobalt.

5 . The method as recited in claim 1 , wherein the electromagnetic radiation-responsive component is selected from the group consisting of nitrides of aluminum, nitrides of titanium, nitrides of zirconium, nitrides of hafnium, nitrides of tantalum, nitrides of tungsten, nitrides of rhenium, carbides of aluminum, carbides of titanium, carbides of zirconium, carbides of hafnium, carbides of tantalum, carbides of tungsten, carbides of rhenium and combinations thereof.

6 . The method as recited in claim 1 , wherein the electromagnetic radiation-responsive component is particulate dispersed through the preceramic polymer.

7 . The method as recited in claim 1 , wherein the preceramic polymer includes, by volume, 0.1%-10% of the electromagnetic radiation-responsive component.

8 . The method as recited in claim 1 , wherein the preceramic polymer includes, by volume, 0.1%-1% of the electromagnetic radiation-responsive component.

9 . The method as recited in claim 1 , including applying the electromagnetic radiation to the preceramic polymer material in an atmosphere of primarily argon, nitrogen or argon/nitrogen.

10 . The method as recited in claim 1 , wherein the electromagnetic radiation is microwave radiation.

11 . A method for fabricating a ceramic material from a preceramic polymer material, the method comprising:
providing a preform that includes a fiber structure and preceramic polymer material within the fiber structure, the preceramic polymer material includes a preceramic polymer and an electromagnetic radiation-responsive component, the electromagnetic radiation-responsive component selected from the group consisting of boron-containing compounds, cobalt, titanium, zirconium, hafnium, tantalum, tungsten, rhenium, nitrides of aluminum, nitrides of titanium, nitrides of zirconium, nitrides of hafnium, nitrides of tantalum, nitrides of tungsten, nitrides of rhenium, carbides of aluminum, carbides of titanium, carbides of zirconium, carbides of hafnium, carbides of tantalum, carbides of tungsten, carbides of rhenium and combinations thereof; and applying electromagnetic radiation to the preform, the electromagnetic radiation interacting with the electromagnetic radiation-responsive component to generate heat that converts the preceramic polymer to a ceramic phase.

12 . The method as recited in claim 11 , wherein the electromagnetic radiation-responsive component is the boron-containing compound.

13 . The method as recited in claim 12 , wherein the boron-containing compound includes boron carbide.

14 . The method as recited in claim 11 , wherein the electromagnetic radiation-responsive component is the cobalt.

15 . The method as recited in claim 11 , wherein the electromagnetic radiation-responsive component is particulate dispersed through the preceramic polymer.

16 . The method as recited in claim 11 , wherein the preceramic polymer includes, by volume, 0.1%-10% of the electromagnetic radiation-responsive component.

17 . The method as recited in claim 11 , wherein the electromagnetic radiation is microwave radiation.

18 . The method as recited in claim 11 , wherein the fiber structure includes silicon carbide fibers, and the ceramic phase is silicon carbide.

19 . A ceramic material comprising:
a body including ceramic phase, the ceramic phase having dispersed there through an electromagnetic radiation-responsive component selected from the group consisting of boron-containing compounds, cobalt, titanium, zirconium, hafnium, tantalum, tungsten, rhenium, nitrides of aluminum, nitrides of titanium, nitrides of zirconium, nitrides of hafnium, nitrides of tantalum, nitrides of tungsten, nitrides of rhenium, carbides of aluminum, carbides of titanium, carbides of zirconium, carbides of hafnium, carbides of tantalum, carbides of tungsten, carbides of rhenium and combinations thereof.

20 . The ceramic material as recited in claim 19 , wherein the ceramic phase includes, by volume, 0.1%-10% of the electromagnetic radiation-responsive component.

Assignees

• United Technologies Corp

Inventors

• Smyth Imelda P
• Berczik Douglas M

Classifications

• C04B2235/3886

  Refractory metal nitrides, e.g. vanadium nitride, tungsten nitride · CPC title

• C04B2235/3843

  Titanium carbides · CPC title

• C04B2235/3847

  Tungsten carbides · CPC title

• C04B2235/408

  Noble metals · CPC title

• C04B35/5603

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