Patent US5352484A successfully refreshed from Google Patents.
US5352484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of densifying a porous substrate by means of a matrix containing carbon
Assignee: Safran Aircraft Engines SAS
•
Filing: 1992-01-17
•
Granted: 1994-10-04
•
Expires: 2012-01-17
Abstract
Abstract A method of densifying a porous substrate by means of a matrix containing carbon, for obtaining an article made of a composite material, the method comprising the following steps: providing on one side of a substrate to be densified a slip containing submicron carbon powder; establishing a pressure difference to force the slip through the substrate; filtering the liquid that has passed through the substrate to retain the carbon powder inside the substrate; and when densification of the substrate by means of the carbon powder has terminated, drying the densified substrate and transforming a carbon precursor introduced into the substrate into carbon by carbonization, thereby binding the powder constituting the matrix.
Inventors
- 👤 Bruno C. Bernard
- 👤 Christian B. Brosse
- 👤 Jean-Claude Cavalier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 16:06
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/71; C04B35/78; C04B35/80; C04B35/83
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
145 words
A method of densifying a porous carbon substrate by means of a matrix containing carbon, for obtaining an article made of composite material, comprising the following steps: introducing into a first side of a porous carbon substrate to be densified a suspension containing submicron carbon powder and a carbon precursor including one of a liquid resin and a resin powder; establishing a pressure difference to force the suspension through the substrate; providing a filter on a second side of the substrate opposite the first side of the substrate, for filtering the suspension to retain the carbon powder inside the substrate and progressively densifying the substrate with the carbon powder that is retained by the filter to produce a densified substrate; and drying the densified substrate and transforming the carbon precursor in the substrate into carbon by carbonization thereby binding the carbon powder constituting the matrix.
Claim 2
Independent Claim
145 words
A method of densifying a porous carbon substrate by means of a matrix containing carbon, for obtaining an article made of composite material, comprising the following steps: introducing into a first side of a porous carbon substrate to be densified a suspension containing submicron carbon powder and a carbon precursor including one of a liquid resin and a resin powder; establishing a pressure difference to force the suspension through the substrate; providing a filter on a second side of the substrate opposite the first side of the substrate, for filtering the suspension to retain the carbon powder inside the substrate and progressively densifying the substrate with the carbon powder that is retained by the filter to produce a densified substrate; and drying the densified substrate and transforming the carbon precursor in the substrate into carbon by carbonization thereby binding the carbon powder constituting the matrix.
Claim 3
Dependent Claim
14 words
A method according to claim 1, wherein the carbon precursor is a resin powder.
Claim 4
Dependent Claim
11 words
A method according to claim 1, carbon precursor is a liquid.
Claim 5
Dependent Claim
19 words
A method according to claim 1, wherein the carbon powder is carbon black having a submicron means grain size.
Claim 6
Dependent Claim
24 words
A method according to claim 1, wherein the suspension further includes a powder of a material that inhibits oxidation mixed with the carbon powder.
Claim 7
Dependent Claim
22 words
A method according to claim 1, wherein after said carbon precursor has carbonized, the resulting material is subjected to a graphitization operation.
Claim 8
Dependent Claim
20 words
A method according to claim 1, wherein vibration is applied to the carbon substrate while the suspension is passing therethrough.
Claim 9
Dependent Claim
19 words
A method according to claim 3, wherein the carbon powder is carbon black having a submicron means grain size.
Claim 10
Dependent Claim
24 words
A method according to claim 4, wherein the suspension further includes a powder of a material that inhibits oxidation mixed with the carbon powder.
Claim 11
Dependent Claim
22 words
A method according to claim 5, wherein after the carbon precursor has carbonized, the resulting material is subjected to a graphitization operation.
Claim 12
Dependent Claim
19 words
A method according to claim 6, wherein vibration is applied to the substrate while the suspension is passing therethrough.
Claim 13
Independent Claim
156 words
A method of densifying a porous carbon substrate by means of a matrix containing carbon, for obtaining an article made of composite material, comprising the following steps: introducing into a first side of a porous carbon substrate to be densified a suspension containing submicron carbon powder and a carbon precursor including one of a liquid resin and a resin powder; establishing a pressure difference to force the suspension through the substrate; providing a filter on a second side of the substrate opposite the first side of the substrate, for filtering the suspension to retain the carbon powder inside the substrate and progressively densifying the substrate with the carbon powder that is retained by the filter to produce a densified substrate; drying the densified substrate and transforming the carbon precursor in the substrate into carbon by carbonization, thereby binding the carbon powder constituting the matrix; and vibrating the porous carbon substrate while the suspension is passing therethrough.
Claim 14
Independent Claim
156 words
A method of densifying a porous carbon substrate by means of a matrix containing carbon, for obtaining an article made of composite material, comprising the following steps: introducing into a first side of a porous carbon substrate to be densified a suspension containing submicron carbon powder and a carbon precursor including one of a liquid resin and a resin powder; establishing a pressure difference to force the suspension through the substrate; providing a filter on a second side of the substrate opposite the first side of the substrate, for filtering the suspension to retain the carbon powder inside the substrate and progressively densifying the substrate with the carbon powder that is retained by the filter to produce a densified substrate; drying the densified substrate and transforming the carbon precursor in the substrate into carbon by carbonization, thereby binding the carbon powder constituting the matrix; and vibrating the porous carbon substrate while the suspension is passing therethrough.
Claim 15
Independent Claim
165 words
A method of densifying a porous carbon substrate by means of a matrix containing carbon, for obtaining an article made of composite material, comprising the following steps: introducing into a first side of a porous carbon substrate to be densified a suspension containing submicron carbon powder and a carbon precursor including one of a liquid resin and a resin powder; establishing a pressure difference to force the suspension through the substrate; providing a filter on a second side of the substrate opposite the first side of the substrate, for filtering the suspension to retain the carbon powder inside the substrate and progressively densifying the substrate with the carbon powder that is retained by the filter to produce a densified substrate; drying the densified substrate and transforming the carbon precursor in the substrate into carbon by carbonization, thereby binding the carbon powder constituting the matrix; and subjecting the bound carbon powder to a graphitization operation; and vibrating the porous carbon substrate while the suspension passing therethrough.
Claim 16
Independent Claim
165 words
A method of densifying a porous carbon substrate by means of a matrix containing carbon, for obtaining an article made of composite material, comprising the following steps: introducing into a first side of a porous carbon substrate to be densified a suspension containing submicron carbon powder and a carbon precursor including one of a liquid resin and a resin powder; establishing a pressure difference to force the suspension through the substrate; providing a filter on a second side of the substrate opposite the first side of the substrate, for filtering the suspension to retain the carbon powder inside the substrate and progressively densifying the substrate with the carbon powder that is retained by the filter to produce a densified substrate; drying the densified substrate and transforming the carbon precursor in the substrate into carbon by carbonization, thereby binding the carbon powder constituting the matrix; and subjecting the bound carbon powder to a graphitization operation; and vibrating the porous carbon substrate while the suspension passing therethrough.
Claim 17
Independent Claim
176 words
A method of densifying a porous carbon substrate by means of a matrix containing carbon, for obtaining an article made of composite material, comprising the following steps: introducing into a first side of a porous carbon substrate to be densified a suspension containing carbon black having a submicron means grain size, a carbon precursor including one of a liquid resin and a resin powder, and a powdered material that inhibits oxidation; establishing a pressure difference to force the suspension through the substrate; providing a filter on a second side of the substrate opposite the first side of the substrate, for filtering the suspension to retain the carbon black inside the substrate and progressively densifying the substrate with the carbon black that is retained by the filter to produce a densified substrate; drying the densified substrate and transforming the carbon precursor in the substrate into carbon by carbonization, thereby binding the carbon black constituting the matrix; subjecting the bound carbon black to a graphitization operation; and vibrating the porous carbon substrate while the suspension is passing therethrough.
Claim 18
Independent Claim
176 words
A method of densifying a porous carbon substrate by means of a matrix containing carbon, for obtaining an article made of composite material, comprising the following steps: introducing into a first side of a porous carbon substrate to be densified a suspension containing carbon black having a submicron means grain size, a carbon precursor including one of a liquid resin and a resin powder, and a powdered material that inhibits oxidation; establishing a pressure difference to force the suspension through the substrate; providing a filter on a second side of the substrate opposite the first side of the substrate, for filtering the suspension to retain the carbon black inside the substrate and progressively densifying the substrate with the carbon black that is retained by the filter to produce a densified substrate; drying the densified substrate and transforming the carbon precursor in the substrate into carbon by carbonization, thereby binding the carbon black constituting the matrix; subjecting the bound carbon black to a graphitization operation; and vibrating the porous carbon substrate while the suspension is passing therethrough.
Claim 19
Independent Claim
173 words
A method of densifying a porous carbon substrate by means of a matrix containing carbon, for obtaining an article made of composite material, comprising the following steps: introducing into a first side of a porous carbon substrate to be densified a suspension containing carbon black having a submicron means grain size and a powdered material that inhibits oxidation; establishing a pressure difference to force the suspension through the substrate; providing a filter on a second side of the substrate opposite the first side of the substrate, for filtering the slip to retain the carbon black inside the substrate and progressively densifying the substrate with the carbon black that is retained by the filter to produce a densified substrate; drying the densified substrate and transforming a resin, introduced by impregnation in the substrate after the substrate has been densified and dried, into carbon by carbonization, thereby binding the carbon black constituting the matrix; subjecting the bound carbon black to a graphitization operation; and vibrating the porous carbon substrate while the slip is passing therethrough.
Claim 20
Independent Claim
173 words
A method of densifying a porous carbon substrate by means of a matrix containing carbon, for obtaining an article made of composite material, comprising the following steps: introducing into a first side of a porous carbon substrate to be densified a suspension containing carbon black having a submicron means grain size and a powdered material that inhibits oxidation; establishing a pressure difference to force the suspension through the substrate; providing a filter on a second side of the substrate opposite the first side of the substrate, for filtering the slip to retain the carbon black inside the substrate and progressively densifying the substrate with the carbon black that is retained by the filter to produce a densified substrate; drying the densified substrate and transforming a resin, introduced by impregnation in the substrate after the substrate has been densified and dried, into carbon by carbonization, thereby binding the carbon black constituting the matrix; subjecting the bound carbon black to a graphitization operation; and vibrating the porous carbon substrate while the slip is passing therethrough.
Claim 21
Independent Claim
143 words
A method of densifying a porous carbon substrate by means of a matrix containing carbon, for obtaining an article made of composite material, comprising the following steps: introducing into a first side of a porous carbon substrate to be densified a slip containing submicron carbon powder; establishing a pressure difference to force the slip through the substrate; providing a filter on a second side of the substrate opposite the first side of the substrate, for filtering the slip to retain the carbon powder inside the substrate and progressively densifying the substrate with the carbon powder that is retained by the filter to produce a densified substrate; drying the densified substrate; introducing a carbon precursor in resin form into the dried densified substrate; and transforming said carbon precursor in the densified substrate into carbon by carbonization thereby binding the carbon powder constituting the matrix.
Claim 22
Independent Claim
143 words
A method of densifying a porous carbon substrate by means of a matrix containing carbon, for obtaining an article made of composite material, comprising the following steps: introducing into a first side of a porous carbon substrate to be densified a slip containing submicron carbon powder; establishing a pressure difference to force the slip through the substrate; providing a filter on a second side of the substrate opposite the first side of the substrate, for filtering the slip to retain the carbon powder inside the substrate and progressively densifying the substrate with the carbon powder that is retained by the filter to produce a densified substrate; drying the densified substrate; introducing a carbon precursor in resin form into the dried densified substrate; and transforming said carbon precursor in the densified substrate into carbon by carbonization thereby binding the carbon powder constituting the matrix.
Claim 23
Dependent Claim
19 words
A method according to claim 16, wherein the carbon powder is carbon black having a submicron means grain size.
Claim 24
Dependent Claim
24 words
A method according to claim 16, wherein the suspension further includes a powder of a material that inhibits oxidation mixed with the carbon powder.
Claim 25
Dependent Claim
22 words
A method according to claim 16, wherein after said carbon precursor has carbonized, the resulting material is subjected to a graphitization operation.
Claim 26
Dependent Claim
20 words
A method according to claim 16, wherein vibration is applied to the carbon substrate while the suspension is passing therethrough.
References Cited (Backward Citations)
CA660107A
Cited
US2962386A
Cited
US3558344A
Cited
US3810780A
Cited
DE2631784A1
Cited
US4339021A
Cited
US4350718A
Cited
WO1986005774A1
Cited
EP0307968A2
Cited
US4937101A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-03 | 1998-04-04 | 1998-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-03 | 2002-04-04 | 2002-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-03 | 2006-04-04 | 2006-10-04 | $7700.00 | Window Closed / Lapsed |