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Title: Process for preparing silicon carbide foam

Abstract

A method of preparing near net shape, monolithic, porous SiC foams is disclosed. Organosilicon precursors are used to produce polymeric gels by thermally induced phase separation, wherein, a sufficiently concentrated solution of an organosilicon polymer is cooled below its solidification temperature to form a gel. Following solvent removal from the gel, the polymer foam is pretreated in an oxygen plasma in order to raise its glass transition temperature. The pretreated foam is then pyrolyzed in an inert atmosphere to form a SiC foam. 9 figs.

Inventors:
; ; ;
Issue Date:
Research Org.:
Sandia Corporation
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
527777
Patent Number(s):
5,668,188
Application Number:
PAN: 8-586,453
Assignee:
Sandia Corp., Albuquerque, NM (United States) SNL; SCA: 360201; PA: EDB-97:125766; SN: 97001846758
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 16 Sep 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; FOAMS; SILICON CARBIDES; SYNTHESIS; POROUS MATERIALS; PYROLYSIS; PRECURSOR

Citation Formats

Whinnery, L.L., Nichols, M.C., Wheeler, D.R., and Loy, D.A. Process for preparing silicon carbide foam. United States: N. p., 1997. Web.
Whinnery, L.L., Nichols, M.C., Wheeler, D.R., & Loy, D.A. Process for preparing silicon carbide foam. United States.
Whinnery, L.L., Nichols, M.C., Wheeler, D.R., and Loy, D.A. Tue . "Process for preparing silicon carbide foam". United States.
@article{osti_527777,
title = {Process for preparing silicon carbide foam},
author = {Whinnery, L.L. and Nichols, M.C. and Wheeler, D.R. and Loy, D.A.},
abstractNote = {A method of preparing near net shape, monolithic, porous SiC foams is disclosed. Organosilicon precursors are used to produce polymeric gels by thermally induced phase separation, wherein, a sufficiently concentrated solution of an organosilicon polymer is cooled below its solidification temperature to form a gel. Following solvent removal from the gel, the polymer foam is pretreated in an oxygen plasma in order to raise its glass transition temperature. The pretreated foam is then pyrolyzed in an inert atmosphere to form a SiC foam. 9 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {9}
}