WO2007034178A1 - Procede destiné à la fabrication d’un corps pyrolysé - Google Patents

Procede destiné à la fabrication d’un corps pyrolysé Download PDF

Info

Publication number
WO2007034178A1
WO2007034178A1 PCT/GB2006/003495 GB2006003495W WO2007034178A1 WO 2007034178 A1 WO2007034178 A1 WO 2007034178A1 GB 2006003495 W GB2006003495 W GB 2006003495W WO 2007034178 A1 WO2007034178 A1 WO 2007034178A1
Authority
WO
WIPO (PCT)
Prior art keywords
pyrolysed
mould
precursors
shaping
heating
Prior art date
Application number
PCT/GB2006/003495
Other languages
English (en)
Inventor
Richard Kenneth Mcainsh
Original Assignee
Richard Kenneth Mcainsh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Richard Kenneth Mcainsh filed Critical Richard Kenneth Mcainsh
Publication of WO2007034178A1 publication Critical patent/WO2007034178A1/fr

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/71—Ceramic products containing macroscopic reinforcing agents
    • C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
    • C04B35/80—Fibres, filaments, whiskers, platelets, or the like
    • C04B35/83—Carbon fibres in a carbon matrix
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
    • C04B2235/52—Constituents or additives characterised by their shapes
    • C04B2235/5208—Fibers
    • C04B2235/5252—Fibers having a specific pre-form
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/94—Products characterised by their shape

Definitions

  • the present invention relates to a method of making pyrolysed bodies, in particular, but not exclusively those made from reinforced ceramic materials, such as carbon-fibre reinforced silicon carbide ceramics.
  • Pyrolysed materials such as silicon carbide ceramics
  • silicon carbide ceramics provide potentially strong, rigid and lightweight materials that are of use in many situations.
  • ceramic materials may be used to make components in internal combustion engines, such as valves. These parts are lightweight, strong, resistant to high temperatures and are hard wearing. They therefore offer many advantages over commonly-used metallic parts.
  • One such method involves heating a quantity of precursor at a relatively low temperature in a mould to form a solid body (often called “a green body” or "a cured body”) . During this step cross-linking between components of the precursor materials occurs to form the cured body.
  • This cured body is then transferred to a second mould or support which is then heated to a high temperature (typically 1000 0 C) in a kiln or oven to pyrolyse the material in the mould.
  • the cured body may be pyrolysed in an inert atmosphere or under vacuum.
  • the resulting pyrolysed body may then be machined to remove unwanted burrs or to return the body to a desired shape before returning the fired body to the first mould where further precursor material is added. This process is repeated until the desired shape of the component is achieved.
  • a method is, inter alia, time-consuming and costly.
  • a method for producing a pyrolysed body comprising:
  • the method of the present invention may be quicker and simpler than the prior art methods by performing the moulding, curing and pyrolysing processes in one mould. This also may result in fewer machining processes being needed to obtain the desired shape of pyrolysed body.
  • the method of the present invention may use standard, known precursors, the precursors being those materials, that after curing and pyrolysis, form the pyrolysed body.
  • the heating device could be any known heating device, but use of a magnetic induction heater enables rapid heating and cooling of samples, and, importantly, more precise temperature control.
  • introducing includes any way of providing the mould with precursors .
  • a cured body is a substantially solid body usually formed by heating precursors to a temperature at which cross-linking occurs between components of the precursors, thus forming a solid body.
  • Those parts of the mould that are heated during pyrolysis should preferably be able to withstand the heat required for pyrolysis so that the mould can be reused.
  • the temperature of certain parts of the mould may be raised to pyrolysis temperatures (typically 1000 to 1500 0 C) .
  • the pyrolysed body may, for example, comprise ceramic material, such as silicon carbide. Alternatively, the pyrolysed body may comprise carbon graphite.
  • the surface or surfaces for shaping a pyrolysed body may be provided by an electrically conductive material.
  • the electrically conductive material may comprise a metal having a melting temperature of more than 1300 0 C.
  • Steel is beneficial when the heating device comprises an induction heater because heating occurs via the creation of eddy currents in the steel and, up to about 700 0 C, magnetisation and demagnetisation of the iron in the steel. This promotes the generation of heat in the surface or surfaces for shaping a pyrolysed body, thus heating the sample in the mould. This facilitates the heating of precursors that are electrically non-conductive.
  • the electrically conductive material may comprises one or more of carbon (graphite) , chromium, nickel, titanium, tungsten and an alloy (such as steel, inconel and monel) .
  • the surface or surfaces for shaping a pyrolysed body may be provided by a layer or layers of electrically conductive or non-conductive material or may be provided by a mould body.
  • the use of conductive layers facilitates heating of the layers without having to heat the whole mould. This may increase the efficiency of the heating arrangement and increases the speed at which the temperature of the sample may be increased.
  • the use of non-conductive layers is beneficial when at least one of the precursors is conductive. In this case, it is not necessary to heat the surface or surfaces for shaping a pyrolysed body directly and thus it is not necessary for the surface or surfaces to be electrically conductive.
  • a non-conductive layer may therefore thermally isolate the remainder of the mould from the sample, thus reducing heat losses into the mould. This may increase efficiency of the apparatus and increases the speed at which the temperature of the sample may be changed.
  • the layer or layers of electrically conductive or electrically non-conductive material may be associated with a mould body which may be substantially thermally non- conductive.
  • the mould body may be formed of electrically conductive material or electrically non-conductive material.
  • the surface or surfaces for shaping a pyrolysed body may be provided by an inner mould body associated with an outer mould body.
  • the outer . mould body may have a higher co-efficient of thermal expansion than the inner mould body. This facilitates venting of unwanted volatile components during pyrolysis by providing a gap between the inner and outer mould bodies .
  • the inner mould body may comprise an electrically conductive material such as graphite and the outer mould body may comprise an electrically conductive material such as a metal, for example, steel.
  • One or more of the precursors may be electrically conductive. This means that an inductive heating element may heat the sample by inducing electrical eddy currents in the sample. Alternatively, electrical contacts may be made with one or more of the precursors and an electrical current passed via the contacts through the one or more of the precursors. In this case, there is no need for there to be any inductive or electrical heating of the surface or surfaces for shaping a pyrolysed body.
  • the heating device which may be provided in the mould body, may ' comprise one or more inductive elements for generating a magnetic field so as to induce heating of said surface or surfaces for shaping a pyrolysed body or heating of one or more of said precursors.
  • the inductive elements typically comprise metal coils.
  • An alternating electrical field (typically of 50, 60 or 400Hz) is passed through the inductive element. This creates an alternating magnetic field in the vicinity of the inductive element.
  • the alternating magnetic field generates electrical eddy- currents in electrically conductive materials (such as the said surface or surfaces for shaping a pyrolysed body, or the precursor) that are placed in the magnetic field. These eddy currents heat the electrically conductive material.
  • ferrous materials up to the Curie temperature of that material by virtue of the rapid magnetisation and demagnetisation of that material. It may therefore be preferable for the said surface or surfaces for shaping a pyrolysed body, or the mould body to comprise a ferrous material, such as steel.
  • the surface or surfaces for shaping a pyrolysed body are provided by an electrically conductive material, then the surface or surfaces for shaping a pyrolysed body may be heated in steps (c) and/or (d) by magnetic induction of electrical currents in said surface or surfaces for shaping a pyrolysed body.
  • such surface or surfaces for shaping a pyrolysed body may be heated by providing electrical contacts associated with said surface or surfaces for shaping a pyrolysed body and passing an electrical current through said surface or surfaces for shaping a pyrolysed body.
  • the precursors may be heated in steps (c) and/or (d) by magnetic induction of electrical currents in said precursors or by providing electrical contacts to said precursor and passing an electrical current through said precursor.
  • the sample itself is conductive, there is no need to provide an electrically conductive surface to heat the sample.
  • the mould may be of the type used for resin transfer moulding .
  • Step (b) may comprise introducing a matrix-forming compound into said mould.
  • the matrix-forming compound is a precursor.
  • the matrix-forming compound may be in the form of an oligomer or polymer that may further polymerise or crosslink during step (c) .
  • the matrix is formed during pyrolisis, and may, for example, be a ceramic matrix or a graphite matrix.
  • the method may further comprise the step of introducing a reinforcement material into said mould prior to step (c) and preferably prior to step (b) .
  • the step of introducing a reinforcement material may comprise introducing the reinforcement material into one half or part of the mould and then closing the mould.
  • the reinforcement material may be in the form of one or more of a cloth, a tow, fibres (which may be long, short or chopped), a shaped preform and a particulate.
  • the cloth may ⁇ be one or more of woven, braided, knitted and stitched.
  • the reinforcement material may comprise one or more of carbon, graphite, ceramic or basalt.
  • the reinforcement material may for example be a carbon fibre, a graphite fibre or a ceramic fibre.
  • the carbon fibre may be an acrylic-derived fibre based on polyacrylnitrile such as those designated T-300, AS-4, T-650, T-700 and T- 1000 available from, for example, Toray and Amoco.
  • the fibres may be pitch-based carbon fibres such as those designated P-25, P-.55, P-75, K-700 and K-IlOO available from, for example, Conoco.
  • the fibres may be non-oxide fibres chosen from the group comprising: silicon carbide, near-silicon carbide, silicon borocarbide, silicon carbonitride or silicon nitrocarbide fibres.
  • Fibre material may further be chosen from the group comprising: refractory metal, refractory metal carbide, refractory metal boride or refractory metal nitride fibres.
  • Illustrative examples of this type include: hafnium carbide, hafnium nitride, hafnium diboride, rhenium, tantalum, tantalum carbide or tantalum nitride. Basalt (particularly in the form of fibres) may also be used as reinforcement material.
  • the matrix-forming material is usually chosen so as to coat well the reinforcement material, and so as to form a strong and durable pyrolysed body.
  • the matrix-forming materials may comprise one or more of polyethylene, polypropylene, polyamide, epoxy, polyester and their precursors.
  • matrix-forming materials may be used, such as silicon oxycarbides (for example, as described in WO2004/063114) , carbon-rich silicon carbides, carbon-rich silicon oxycarbides, polycarbosilanes, hydridopolycarbosilanes, polyhydridosilanes, polyhydridosilazanes, polysiloxane, polysesquilsiloxane, the carbosilanes of US5153295 and high char yield hydrocarbon polymer.
  • silicon oxycarbides for example, as described in WO2004/063114
  • carbon-rich silicon carbides carbon-rich silicon oxycarbides
  • polycarbosilanes for example, as described in WO2004/063114
  • polycarbosilanes for example, as described in WO2004/063114
  • polycarbosilanes for example, as described in WO2004/063114
  • polycarbosilanes for example, as described in WO2004
  • Steps (b) , (c) and (d) may be repeated. This is often desirable to produce items of the desired shape, density and size .
  • the method may comprise introducing a reinforcement material prior to only the first curing step.
  • Matrix-forming material may be added to the mould after each of a plurality of curing and pyrolisation steps. This promotes the ease with which items of the desired shape and size to be produced.
  • the mould surface or surfaces for shaping a pyrolysed body may preferably be cooled between step (d) and any subsequent step (b) . Cooling promotes the readiness with which precursors may be safely introduced into the mould after pyrolysis .
  • Gas may be passed through the mould between the surface or surfaces for shaping a pyrolysed body and the body that is to be pyrolysed or is being pyrolysed.
  • This promotes the ease with which air may be removed from the space between the surface or surfaces for shaping a pyrolysed body and the body, for example by a vacuum pump, or promotes the ease with which a gas (such as an inert gas) may be introduced into the space between the surface or surfaces for shaping a pyrolysed body and the body.
  • a gas such as an inert gas
  • One could therefore inject a precursor to the pyrolysed body (such as a matrix-forming compound) into the mould via an aperture or port provided in the mould. The same port or aperture could be used to supply gas to, or remove gas from, the space between the body and the surface or surfaces for shaping a pyrolysed body.
  • the pressure of air m the region between the surface or surfaces for shaping a pyrolysed body and the body being pyrolysed may be lower than atmospheric pressure during step (d) . This helps reduce the likelihood of unwanted oxidation of the body as it is being pyrolysed. This may be readily- effected using a vacuum pump.
  • an inert gas may be introduced into the region between the surface or surfaces for shaping a pyrolysed body and the body being pyrolysed.
  • inert means any gas that is less reactive than air at atmospheric pressure. Examples of such inert gases include nitrogen and the noble gases (for example, helium, neon and argon) .
  • a reactive gas may be introduced into the region between the surface or surfaces for shaping a pyrolysed body and the body being pyrolysed.
  • ammonia gas may ' encourage certain polymers (such as KiON® Ceraset® Ultra Polysilazane and KiON® Ceraset® Polysilazane 20, KiON Corporation, Huntingdon Valley, Pennsylvania, 19006, USA) to form silicon nitride ceramic, rather than the silicon carbide ceramics that would be formed in the absence of ammonia.
  • Step (d) may involve heating said mould in a kiln or oven.
  • Step (c) may involve heating said one or more precursors to a temperature in the range of from 100 to 400 0 C, preferably in the range of from 150 to 300 0 C and more preferably in the range of from 250 to 300 0 C. Such temperatures are typically involved in forming a solid cured body.
  • Step (d) may involve heating said cured body to a temperature of in the range of from 800 to 1500 0 C, preferably in the range of from 1000 to 1400 0 C and more preferably in the range of from 1100 to 1300 0 C. Such temperatures are typically involved in pyrolysing cured bodies .
  • a method for producing a pyrolysed body comprising: (a) providing a mould with a surface or surfaces for shaping a pyrolysed body;
  • the method of the second aspect of the invention promotes rapid pyrolysis.
  • the method of the second aspect of the present invention may incorporate those features described above in relation to the method of the first aspect of the present invention. For example, steps (b) , (c) and (d) may be repeated. It is especially preferred that reinforcement material is introduced into the mould before step (c) .
  • the methods of the first and second aspects of the present invention may be used to make products such as machine components, particularly automobile components like engine components and brake components.
  • the present invention further provides a method of making a machine component, the method comprising:
  • the method of this aspect of the present invention may incorporate those features described above in relation to the method of the first aspect of the present invention.
  • the mould is preferably of the type used in resin transfer moulding.
  • the step of introducing one of more precursors is preferably performed by injecting the precursor into the mould through a mould inlet.
  • the method may further comprise the steps, after step (e) and before step (f), of machining the pyrolysed body to a desired shape and reintroducing the pyrolysed body into the mould. This would typically be followed by a repeat of steps (b) to (e) .
  • the present invention further provides a method of making a pyrolysed body, the method including: (a) providing a mould having a surface or surfaces for shaping a pyrolysed body, the mould being of the type suitable for resin transfer moulding;
  • the method of this aspect of the present invention may incorporate those features described above in relation to the method of the first aspect of the present invention.
  • Figure 1 is a schematic representation of an exploded view of a portion of an apparatus used in the method of the present invention, the representation showing a sample in the shape of a valve component for an internal combustion engine
  • Figure 2a is a plan view of part of an apparatus for use in the method of the present invention
  • Figure 2b is a plan view of the part of the apparatus of
  • Figure 3 is an exploded view showing an arrangement used to facilitate the introduction of precursor material into the mould.
  • a mould 2 formed from graphite comprises two mould halves 2a, 2b, a surface of each mould (shown in the case of mould half 2b as reference numeral 3b) forming a cavity (shown as integer 10 in Figure 2a) which defines the shape of the object made in the mould 2.
  • the cavity is intended to produce a valve suitable for inclusion in a motor vehicle engine.
  • the shape of the cavity may be any shape and is not limited to that shown.
  • a sample 1 in the form of a valve component for an internal combustion engine is shown as formed by the method of the present invention.
  • mould 2 is an inner mould body that is disposed within an outer mould body 11.
  • the outer mould body 11 comprises two halves 11a, lib formed of steel.
  • the outer mould body 11 is provided with six induction heating elements 12a-12f associated with an electrical power supply (not shown) .
  • Each heater 12a-f comprises a coil of copper.
  • Reinforcement material in the form of a carbon fibre preform is inserted into the cavity 10 between the two halves 2a, 2b of mould 2.
  • the preform is made of braided carbon fibre and is generally in the shape of the finished-product valve.
  • a precursor in the form of a matrix-forming material that will be subsequently be pyrolysed to form a ceramic matrix around the carbon fibre preform is then injected around the preform into the cavity 10. The matrix-forming material penetrates into the gaps in the braided preform.
  • the matrix-forming material is the linear oxycarbide precursor - [Si (CH 3 ) 2CH 2 Si (CH 3 ) HCH 2 Si (CH 3 ) 2 0] n ⁇ described in WO2004/063114, but those skilled in the art will realise that many different materials may be used.
  • the mould 2 is then placed in outer mould body 11, the halves lla, lib being secured together to form a tight fit around mould 2.
  • An alternating electrical current having a frequency of about 60Hz is then applied to one or more of the six induction heating elements 12a-f. This alternating electrical current generates an alternating magnetic field which induces electrical eddy currents in any electrically conductive material in the magnetic field.
  • Such electrical eddy currents are generated in the steel outer mould body
  • the induction heating elements 12a-f dictates the degree of heating (and thus the temperature) of the outer mould body 11, the mould 2 and the carbon fibre preform.
  • the precursors are heated slowly to about 100 0 C at a rate of about 2°C/minute, and the temperature is then maintained at about 100 0 C for about an hour.
  • the temperature of the precursors is then increased at about 0.5-l°C/minute until a curing temperature of about 200-400 0 C is reached.
  • the temperature is then maintained at about 200-400 0 C for about 0.5 to 2 hours in order to produce a cured body.
  • the curing process causes the matrix-forming material to form a solid cured body around the carbon fibre preform.
  • the temperature of °the cured body is increased at about 2°C/minute up to about 850 to 1150 0 C.
  • a vacuum pump (not shown) is used to remove air from the cavity and the space 18 formed between the mould 2 and the outer mould body 11. This decreases the -concentration of oxygen around the sample
  • the cured body is then held at 1150 0 C for about 1 hour in order to pyrolise the cured body.
  • the higher thermal co-efficient of expansion of the outer mould body 11 compared to the mould 2 ensures that the mould 2 no longer fits snugly with the outer mould body 11, there being a rattling fit between the mould and outer mould body 11 (see Figure 2b) .
  • the aperture or port to which the vacuum pump is attached to the mould is the same as that used to inject matrix-forming material into the mould 2.
  • the arrangement used to facilitate this is described in more detail below with reference to Figure 3.
  • the sample is cooled to room temperature. This may be achieved by merely allowing the apparatus to cool or by using water cooling. Rapid cooling should be avoided because this risks cracking the pyrolysed body.
  • Matrix-forming material is introduced through an inlet 25 provided in plate 24.
  • the plate 24 is arranged above a cylindrical spacer 22 and spacer support 21.
  • the support 21 is provided with an aperture 28 into which the spacer 22 is inserted during use.
  • the support 21 and spacer 22 are arranged above mould 2, with the spacer 22 arranged directly above the cavity 10 in which the pyrolysed body is formed.
  • Inlet 25 is in fluid communication with grooves (only three of which, 23a, 23b, 23c are visible) provided in the spacer 22. The grooves are spaced around the circumference of the spacer, each groove extending along the longitudinal length of the spacer.
  • the grooves provide a fluid path between the inlet 25 and the cavity 10 so that matrix-forming material may be introduced through the inlet 25 into the cavity 10 via the grooves 23a, 23b, 23c.
  • a second plate 26 is provided under the mould 2, the second plate 26 being provided with an outlet 27.
  • a vacuum pump or the like may be attached to outlet 27 in order to draw matrix-forming material into the mould 2.
  • a vacuum pump or a supply of relatively inert gas may be attached to either of the inlet 25 or outlet 27 so as to provide a relatively inert atmosphere around the body in the mould.
  • the arrangement of Figure 3 is designed so that the same inlet may be used to introduce matrix-forming material into the mould and to provide a relatively inert atmosphere around the body in the mould.
  • Plate 24 and second plate 26 may be clamped to the mould 2.
  • spacer 22 and spacer support 21 may be replaced by a single component, but it is advantageous for the spacer and support to be separable in order to assist cleaning.
  • each of the steel outer mould body 11, the mould 2 and the preform was formed from electrically conductive material.
  • the magnetic fields generated by the magnetic induction rods 12a-f induce electrical fields in these conductive materials and this, in turn, generates heat in these conductive materials.
  • the magnetic induction technique will, of course, still work when only one of the mould and the preform is conductive.
  • the mould 2 shown in the figures comprises two halves 2a, 2b made of graphite.
  • the mould halves may each comprise a body of relatively non-conductive material provided with a layer of conductive material (such as steel) that forms the surfaces (e.g. 2b) that form the cavity 10.
  • the layer may be of the order of 5mm thick.
  • the layer construction has the advantage that the bodies of non-conductive material would not transmit heat away from the sample 1 that is being heated. This would facilitate more rapid heating and cooling of the sample.
  • the vacuum pump of the present example (used to reduce the air pressure around the body or sample at high temperature) may be replaced by a positive pressure pump used to pump an inert gas into the cavity 10. Such an arrangement would help to reduce the amount of potentially-harmful air around the sample 1.
  • inert gases include nitrogen, helium and argon.
  • the carbon fibre preform is not essential for the method of the present invention. It is possible to use no reinforcing material, although it is often desirable to use one. Other examples of preferred reinforcing material include ceramic fibres and basalt fibres.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Composite Materials (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Resistance Heating (AREA)

Abstract

La présente invention concerne un procédé permettant de fabriquer un corps pyrolysé. Le procédé consiste à : (a) disposer d’un moule (2) présentant une surface (3b) ou plus destinées à former un corps pyrolysé ; (b) introduire un ou plusieurs précurseurs du corps pyrolysé dans le moule, le moule étant associé à un dispositif de chauffage (12a-f) servant à chauffer un ou plusieurs précurseurs du corps pyrolysé ; (c) chauffer un ou plusieurs desdits précurseurs afin de former un corps durci à partir desdits précurseurs ; et (d) chauffer ledit corps durci dans le moule afin d’obtenir un corps pyrolysé.
PCT/GB2006/003495 2005-09-20 2006-09-20 Procede destiné à la fabrication d’un corps pyrolysé WO2007034178A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0519178A GB2430177B (en) 2005-09-20 2005-09-20 Method of making a pyrolysed body
GB0519178.8 2005-09-20

Publications (1)

Publication Number Publication Date
WO2007034178A1 true WO2007034178A1 (fr) 2007-03-29

Family

ID=35249098

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2006/003495 WO2007034178A1 (fr) 2005-09-20 2006-09-20 Procede destiné à la fabrication d’un corps pyrolysé

Country Status (2)

Country Link
GB (1) GB2430177B (fr)
WO (1) WO2007034178A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8017059B2 (en) 2007-09-13 2011-09-13 The Boeing Company Composite fabrication apparatus and method
US8375758B1 (en) 2007-09-13 2013-02-19 The Boeing Company Induction forming of metal components with slotted susceptors
US8372327B2 (en) 2007-09-13 2013-02-12 The Boeing Company Method for resin transfer molding composite parts
US8865050B2 (en) 2010-03-16 2014-10-21 The Boeing Company Method for curing a composite part layup
DE102016108782A1 (de) * 2016-05-12 2017-11-16 Universität Stuttgart Verfahren zur Herstellung von basaltfaserverstärkten Verbundbauteilen und hierdurch hergestellte Gegenstände
CN116041072B (zh) * 2023-01-09 2023-09-01 中国人民解放军国防科技大学 一种中空SiCN陶瓷纤维及其制备方法、应用

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1055649A2 (fr) * 1999-05-24 2000-11-29 MRCC, Inc. Matériau composite à matrice en carbone vitreux son procédé de fabrication et son utilisation
EP1281696A1 (fr) * 2001-02-27 2003-02-05 Japan Science and Technology Corporation Procede de production de materiau composite sic renforce de fibre sic de masse volumique elevee

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3969124A (en) * 1974-02-11 1976-07-13 Exxon Research And Engineering Company Carbon articles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1055649A2 (fr) * 1999-05-24 2000-11-29 MRCC, Inc. Matériau composite à matrice en carbone vitreux son procédé de fabrication et son utilisation
EP1281696A1 (fr) * 2001-02-27 2003-02-05 Japan Science and Technology Corporation Procede de production de materiau composite sic renforce de fibre sic de masse volumique elevee

Also Published As

Publication number Publication date
GB0519178D0 (en) 2005-10-26
GB2430177B (en) 2011-01-05
GB2430177A (en) 2007-03-21

Similar Documents

Publication Publication Date Title
WO2007034178A1 (fr) Procede destiné à la fabrication d’un corps pyrolysé
KR100624094B1 (ko) 탄소섬유 강화 세라믹 복합체 제조방법
US5350545A (en) Method of fabrication of composites
US8039053B2 (en) Method for making a part of composite material with ceramic matrix and resulting part
EP2093453B1 (fr) CVI suivi d'une densification de la nuance du goudron de houille par VPI
CN102752889B (zh) 用于多孔材料致密化的装置
JPH09504263A (ja) コントロールした表面温度における多孔質基材への物質の蒸気相化学浸透方法
JP2001503725A (ja) リング形状のスタックに配列した基体の温度勾配下における気相下での緻密化
US7011786B2 (en) Process for producing shaped bodies comprising fiber-reinforced ceramic materials
US20030168757A1 (en) Process for producing hollow bodies comprising fiber-reinforced ceramic materials
Hatta et al. Carbon/carbons and their industrial applications
CN114702328A (zh) 一种SiC纳米线网络增强层状多孔SiC陶瓷及其制备方法
US11332411B2 (en) Method for producing a consolidated fiber preform
JP3574133B2 (ja) 温度勾配を形成した繊維質基材内における物質の化学的蒸気浸透法
EP2298716A2 (fr) Procédé pour densifier rapidement des structures poreuses asymétriques de forme complexe
Weiß Carbon/carbons and their industrial applications
EP1156992B1 (fr) Densification de corps poreux
Devlin et al. Microwave assisted chemical vapor infiltration
Stinton et al. Fiber-reinforced tubular composites by chemical vapor infiltration
Coltelli et al. Chemical vapour infiltration of composites and their applications
US11746059B2 (en) Induction melt infiltration processing of ceramic matrix composite components
JP2669090B2 (ja) Ｃ／ｃ複合ロッドを用いたｃ／ｃ複合材の製造方法
Coltelli et al. Chapter X Recent advances in CVI of composites and their applications

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06779498

Country of ref document: EP

Kind code of ref document: A1