In situ grown SiC coatings on carbon materials

Patent metadata

Field	Value
Publication number	US-10934172-B2
Application number	US-201715606110-A
Country	US
Kind code	B2
Filing date	May 26, 2017
Priority date	Apr 21, 2011
Publication date	Mar 2, 2021
Grant date	Mar 2, 2021

Abstract

A β-SiC coating made by the method of mixing SiO2 with carbon and heating the mixture in vacuum wherein the carbon is oxidized to CO gas and reduces the SiO2 to SiO gas and reacting a carbon material, comprising stainless steel with a carbon coating, with the SiO gas at a temperature in the range of 1300 to 1600° C. resulting in a SiC coating on the stainless steel.

First claim

What is claimed as new and desired to be protected by Letters Patent of the United States is:

1. A β-SiC coating directly contacting stainless steel formed by the method comprising:
mixing SiO 2 with carbon;
placing the SiO 2 and carbon mixture in a reaction vessel;
separately placing a carbon substrate in the reaction vessel containing the SiO 2 and carbon mixture, wherein the carbon substrate is stainless steel with a carbon coating; and
heating the reaction vessel in vacuum at a temperature in the range of 1300 to 1600° C., wherein the carbon is oxidized to CO gas and reduces the SiO 2 to SiO gas, wherein the carbon coating on the stainless steel is converted to a β-SiC coating resulting in a β-SiC coating directly contacting the stainless steel.

2. The β-SiC coating formed by the method of claim 1 , wherein the carbon substrate comprises graphite, vitreous carbon, amorphous carbon, diamond, or any combination thereof.

3. β-SiC coating formed by the method of claim 1 , wherein SiO 2 is a powder, an alkoxide precursor, a crystalline or glassy morphology, or any combination thereof.

4. The β-SiC coating formed by the method of claim 1 , wherein the carbon mixed with the SiO 2 comprises graphite, vitreous carbon, activated carbon, carbon black, carbon containing organic compounds, or any combination thereof.

Assignees

• The Government Of The Us Secrectary Of The Navy
• Us Gov Sec Navy

Inventors

• Villalobos Guillermo R
• Hunt Michael
• Sadowski Bryan
• Sanghera Jasbinder S
• Aggarwal Ishwar D

Classifications

• C04B2235/762

  Cubic symmetry, e.g. beta-SiC · CPC title

• C01B32/97

  Preparation from SiO or SiO2 · CPC title

• C04B2235/425

  Graphite · CPC title

• C04B41/87

  Ceramics · CPC title

• C04B2235/424

  Carbon black · CPC title