Method of forming a fibrous structure composite ceramic material and material thus obtained
AssigneeAerospatiale Societe Nationale Industrielle
InventorsCaroline Debaig-Valade, Claude Filliatre, Christian Servens
Life of this patent
Estimating the term…
Abstract
A method is provided for forming a composite ceramic material, in which a fibrous structure is first of all formed which is then embedded in the material of a ceramic matrix. To introduce said matrix into said structure, the following succession of operations is carried out: (a) said fibrous support is impregnated with a polymerization catalyst for an organometallic precursor of said ceramic matrix; (b) said fibrous support impregnated with said polymerization catalyst is placed in contact with said organometallic precursor; (c) said organometallic precursor is polymerized, and (d) said organometallic precursor is pyrolysed so as to obtain said matrix.
Claims16
A method for forming a composite ceramic material, in which a fibrous support is first of all formed which is then embedded in a material of a ceramic matrix, which method includes, in order to introduce said matrix into said structure, the following succession of operation:
- (a) said fibrous support is impregnated with a polymerization catalyst for polymerizing a polymerizable organometallic precursor capable of forming a ceramic matrix upon pyrolysis;
- (b) said fibrous support impregnated with said polymerization catalyst is placed in contact with said polymerizable organometallic precursor;
- (c) said organometallic precursor is polymerized, and
- (d) said organometallic precursor is pyrolyzed so as to obtain said matrix.
The method as claimed in claim 2, wherein said fibrous support is impregnated with a solution of said polymerization catalyst.
A method for forming a composite ceramic material having a fibrous structure embedded in a ceramic matrix, comprising the steps of:
- (a) impregnating said fibrous structure with a polymerization catalyst for polymerizing a polymerizable organometallic precursor of said ceramic matrix, said polymerizable catalyst selected from the group consisting of polyborodimethylsiloxane, polyborodiethylsiloxane, polyborodiphenylsiloxane, poyborodivinylsiloxane, trifluoromethanesulfonic acid, tribromomethanesulfonic acid, trifluoracetic acid and dodecacarbonyltriruthenium;
- (b) placing said fibrous structure impregnated with said polymerization catalyst in contact with said polymerizable organometallic precursor selected from the group consisting of carbosilanes, silazanes, carbosilazanes, borazines, borazanes and aluminosilicate-silanes;
- (c) polymerizing said organometallic precursor;
- and
- (d) pyrolyzing said organometallic precursor so as to obtain said matrix.
A method for forming a composite ceramic material having a fibrous structure embedded in a ceramic matrix, comprising the steps of:
- (a) impregnating said fibrous structure with a polymerization catalyst for polymerizing a polymerizable organometallic precursor capable of forming ceramic matrix upon pyrolysis;
- and
- (b) placing said fibrous structure impregnated with said polymerization catalyst in contact with said polymerizable organometallic precursor, wherein the organometallic precursor used is an indirect precursor capable of giving rise, by heat treatment, to a direct precursor, and wherein the indirect precursor is B-triphenyl N-trimethylborazine;
- (c) polymerizing said organometalic precursor;
- and
- (d) pyrolyzing said organometallic precursor so as to obtain a boron nitride matrix.
Dependencies are inferred from the claim text.