METHOD FOR DENSIFICATION OF AMORPHOUS CERAMIC MATERIAL
Assignee
DOW CORNING CORPORATION, THE, A CORP. OF MICHIGAN
Filed
Nov 13, 1987
Granted
May 1, 1990
Location
MIDLAND MI US
Abstract
The elastic modulus and density of an amorphous, ceramic article derived from a resinous organosilicon polymer and having a composition consisting essentially of silicon, nitrogen and/or carbon are increased while substantially maintaining or improving tensile strength by heat treating the ceramic article at an elevated temperature under superatmospheric nitrogen pressure to increase its density while avoiding crystallization. During heat treatment, at least some of the conditions of time, temperature, heating rate, cooling rate, pressure and atmosphere are controlled to minimize erosion of the article which could otherwise occur due to the loss to the surrounding atmosphere, as a gas or gaseous component, of at least one of nitrogen, silicon and carbon. The heat treated, ceramic article is amorphous and non-crystalline and has a density substantially greater than 2.5 g/cc together with desirable values of tensile strength and elastic modulus.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jun 29, 1988
Rescinded
Sep 7, 1989
Duration
1 year, 2 months
Inventor
- 1JAMES A. RABE
Record Details
- Patent number
- US 4921657
- Application
- 07120108
- Aerospace match
- No
- Dataset source
- 35 USC §181 SO records