Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Patent
1989-09-27
1992-08-04
Robinson, Ellis P.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
501 92, 501 97, 501154, 428364, 428372, 428398, 428446, 428698, 428902, C04B 3552
Patent
active
051358093
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.
REFERENCES:
patent: 3853567 (1974-12-01), Verbeek
patent: 4572902 (1986-02-01), Matano et al.
patent: 4585704 (1986-04-01), Hirai et al.
patent: 4761389 (1988-08-01), Rabe et al.
patent: 4861532 (1989-08-01), Haluska
Legrow. et al., "Ceramics from Hydridopolysilazane" Amer. Ceram. Sok. Bull 66 (2) 363-367 (1987).
Lipowitz et al., "Composition & Structure of Ceramic Fibers Prepared from Polymer Precursors" Adv. Cerm. Materials vol. 2, No. 2, Apr. 1987.
Translation of German Patents Appl. P2236078.7 Verbeek et al. now Patent DG 2,236,078.
Jones Richard E.
Lipowitz Jonathan
Rabe James A.
Bittell James E.
Dow Corning Corporation
Robinson Ellis P.
Turner Archene
LandOfFree
Method for densification of amorphous ceramic material does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for densification of amorphous ceramic material, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for densification of amorphous ceramic material will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-777330