STRUCTURAL ARTICLES
Assignee
AIR PRODUCTS AND CHEMICALS, INC., A CORP. OF DE.
Filed
Jun 11, 1987
Granted
Nov 9, 1993
Location
FLINTRIDGE CA US
Abstract
A structural article for high temperature applications comprises a body formed of at least partially consolidated, particulate silicon nitride, a conformal outer coating of silicon nitride or silicon carbide on the body, and a conformal intermediate layer of a silicon, oxygen and nitrogen-containing compound, i.e. silicon oxynitride, chemically bonded to both the body and the outer coating. The method for making such an article comprises providing a body formed of at least partially consolidated, particulate silicon nitride, oxidizing the surface of the body, removing silicon dioxide from the oxidized surface of the body; and chemically vapor depositing a conformal outer coating of silicon nitride or silicon carbide. The conformal outer coating provides a protective envelope around and assists in high temperature isostatic pressing of the body and hence permits one to use the structural article in isostatic pressing processes.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Dec 10, 1987
Rescinded
Jan 19, 1993
Duration
5 years, 1 month
Inventor
- 1ROBERT A. HOLZL
Record Details
- Patent number
- US 5260096
- Application
- 07062292
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records