ALUMINUM NITRIDE-BORON NITRIDE COMPOSITE ARTICLE AND METHOD OF MAKING SAME
Assignee
GENERAL ELECTRIC COMPANY A NY CORP
Filed
Oct 14, 1983
Granted
May 19, 1987
Location
PISCATAWAY NJ US
Abstract
A process for making a structural ceramic article, such as, an electromagnetic window, is disclosed, wherein the ceramic article is comprised of a densified mixture of not less than 50% by volume aluminum nitride and up to about 50% by volume boron nitride. The ceramic article of the present invention may be used as a shield or protective barrier such as an electromagnetic window for communication or detection devices on high speed transportation or delivery vehicles passing through extremely hostile environments, where it exhibits radar transparency, congruent vaporization kinetics, tailorable dielectric properties, improved thermal shock resistance, improved mechanical toughness and strength, improved spall resistance, improved recession rate, i.e. erosion rate and ablation rate, and high refractoriness.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Sep 18, 1984
Rescinded
Mar 13, 1986
Duration
1 year, 5 months
Inventor
- 1JOHN R. MORRIS
Record Details
- Patent number
- US 4666873
- Application
- 06541914
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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