METHOD OF MAKING A RADAR TRANSPARENT WINDOW MATERIAL OPERABLE ABOVE 2000 DEGREE C
Assignee
FORD AEROSPACE & COMMUNICATIONS CORPORATION
Filed
Dec 23, 1985
Granted
May 6, 1997
Location
COSTA MESA CA US
Abstract
A method is disclosed for making a microwave radar transparent window material operable at temperatures above 2000 DEG C., and which material possesses high tensile strength, is resistant to .erosion as well as particle impact at such temperatures, and is highly machinable. The method comprises: blending a powder mixture of 20-60% by weight silicon nitride, 12-40% boron nitride, 15-40% boron nitride, 15-40% silica, and 1-20% oxygen carrying sintering aids; (b) molding the mixture to shape as a preform; and (c) densifying the shaped preform into a monolithic window having high temperature stability and transparency at high temperatures.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jun 15, 1987
Rescinded
Jun 6, 1994
Duration
6 years, 11 months
Inventor
- 1DAVID G. PAQUETTE
Record Details
- Patent number
- US 5627542
- Application
- 00681242
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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