The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 1992
Filed:
Dec. 20, 1988
Applicant:
Inventors:
Pierre Lespade, Merignac, FR;
Alain Guette, Bouscat, FR;
Erik Menessier, Talence, FR;
Roger Naslain, Pessac, FR;
Rene Paillier, Cestas, FR;
Assignee:
Aerospatiale Societe Nationale Industrielle, Paris, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23B / ; B29C / ;
U.S. Cl.
CPC ...
264 60 ; 264136 ; 264137 ; 427370 ; 427379 ; 427380 ;
Abstract
A method of manufacturing a composite material formed of a fibrous reinforcement and a silica based ceramic or vitro-ceramic matrix. The method includes impregnating the fibrous reinforcement by means of a sol-gel process wherein premature crystallization of the matrix obtained from the sol is hindered by addition to the sol of a crystallization retarding agent, and hot pressing the resulting material. The composite material formed has a residual porosity without the addition of nucleating agents of about less than 10%.