Patent US4060413A successfully refreshed from Google Patents.
US4060413A
Expired / Lapsed
US
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Method of forming a composite structure
Assignee: Westinghouse Canada Inc
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Filing: 1976-06-11
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Granted: 1977-11-29
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Expires: 1996-06-11
Abstract
Abstract Composite turbine blades and vanes have been proposed in the past formed from nickel or cobalt base superalloys and reinforcing fibres such as tungsten, molybdenum, silicon carbide, or graphite. One of the problems has been the spacing of the fibres and arrangement within the form. The present invention provides for such arrangement by means of aligning the fibres on an alloy powder tape or cloth comprising powdered superalloy and an organic binder. Pieces of the tape are then cut in the desired shape and arranged within a mold and subsequently bonded into a consolidated shape.
Inventors
- 👤 Peter J. Mazzei
- 👤 Gerrit VanDrunen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 04:11
CPC Classifications
C; C22; C22C; C22C47/00; C22C47/02; C22C47/06; C22C47/062; C22C47/068; C22C47/20; F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/282; B; B22; B22F; B22F2998/00; B22F2999/00; Y; Y02; Y02T; Y02T50/00; Y02T50/60; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336; Y10T29/49337
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
132 words
A method of forming a composite article of specific shape formed from matrix material and reinforcing fibres comprising forming a flexible plastic tape including said matrix material in powdered form and a flexible plastic decomposable binder, arranging a plurality of continuous parallel fibres on the surface of said tape, embedding said fibres in said tape by heat and pressure or by applying a second layer of tape matrix material cutting from the resulting tape a plurality of laminae of suitable shape, arranging said laminae in a container in such a manner as to form said specific shape, subjecting said laminae to heat and outgassing to remove said decomposable binder and subjecting said laminae and container to lateral movements bond said matrix material and fibres into a substantially void free conherent composite article.
Claim 2
Independent Claim
132 words
A method of forming a composite article of specific shape formed from matrix material and reinforcing fibres comprising forming a flexible plastic tape including said matrix material in powdered form and a flexible plastic decomposable binder, arranging a plurality of continuous parallel fibres on the surface of said tape, embedding said fibres in said tape by heat and pressure or by applying a second layer of tape matrix material cutting from the resulting tape a plurality of laminae of suitable shape, arranging said laminae in a container in such a manner as to form said specific shape, subjecting said laminae to heat and outgassing to remove said decomposable binder and subjecting said laminae and container to lateral movements bond said matrix material and fibres into a substantially void free conherent composite article.
Claim 3
Dependent Claim
38 words
A method of forming a composite article as claimed in claim 1 wherein said laminae are arranged in said form within a container and the remaining space in said container is filled with matrix material in powdered form.
Claim 4
Dependent Claim
37 words
A method of forming a composite article as claimed in claim 2 wherein said container is subjected to heating, outgassing and evacuation prior to subjecting the laminae to pressure to bond the laminae into a composite article.
Claim 5
Dependent Claim
34 words
A method of forming a composite article as claimed in claim 3 wherein said container is subjected to hot isostatic pressing at a temperature and pressure sufficient to produce a substantially coherent composite article.
Claim 6
Dependent Claim
21 words
A method of forming a composite article as claimed in claim 2 wherein said container is subsequently removed from said article.
Claim 7
Dependent Claim
26 words
A method of forming a composite article as claimed in claim 2 wherein said container is retained to constitute a part of the resulting composite article.
Claim 8
Dependent Claim
46 words
A method of forming a composite article as claimed in claim 2 wherein said container is a frangible ceramic container which is supported within a metallic container and totally surrounded therein by a suitable pressure transmitting medium prior to subjecting said container to heat and pressure.
Claim 9
Independent Claim
126 words
A method of forming a composite article formed from a matrix of superalloy and metallic fibres selected from the class of tungsten, molybdenum, silicon carbide and graphite fibres, comprising forming a flexible tape consisting of powdered superalloy and a plastic organic material, arranging a plurality of continuous parallel fibres between two layers of said tape, bonding the tape and fibres into a substantially void free composite tape, substantially filling a metallic container with laminae cut from said composite tape, heating and outgassing said container to decompose and remove said organic material, flushing said heated container with hydrogen gas, filling any remaining space in said container with powdered superalloy, evacuating said container and subjecting said container to hot isostatic pressing sufficient to form a coherent composite article.
Claim 10
Independent Claim
126 words
A method of forming a composite article formed from a matrix of superalloy and metallic fibres selected from the class of tungsten, molybdenum, silicon carbide and graphite fibres, comprising forming a flexible tape consisting of powdered superalloy and a plastic organic material, arranging a plurality of continuous parallel fibres between two layers of said tape, bonding the tape and fibres into a substantially void free composite tape, substantially filling a metallic container with laminae cut from said composite tape, heating and outgassing said container to decompose and remove said organic material, flushing said heated container with hydrogen gas, filling any remaining space in said container with powdered superalloy, evacuating said container and subjecting said container to hot isostatic pressing sufficient to form a coherent composite article.
Claim 11
Dependent Claim
31 words
A method as claimed in claim 8 including the additional step of subsequently shaping said coherent composite article to the desired final shape without thereby exposing any of the included fibres.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-28 | 1981-05-30 | 1981-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-28 | 1985-05-30 | 1985-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-28 | 1989-05-30 | 1989-11-29 | $7700.00 | Window Closed / Lapsed |