EP3994205A1 - Nouveau matériau composite ablatif - Google Patents
Nouveau matériau composite ablatifInfo
- Publication number
- EP3994205A1 EP3994205A1 EP20735592.6A EP20735592A EP3994205A1 EP 3994205 A1 EP3994205 A1 EP 3994205A1 EP 20735592 A EP20735592 A EP 20735592A EP 3994205 A1 EP3994205 A1 EP 3994205A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- composite material
- matrix
- ablative composite
- carbon fibers
- ablative
- Prior art date
- Legal status (The legal status 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 status listed.)
- Pending
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 31
- 239000011159 matrix material Substances 0.000 claims abstract description 29
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 24
- 239000004917 carbon fiber Substances 0.000 claims abstract description 24
- 239000003822 epoxy resin Substances 0.000 claims abstract description 19
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 19
- 239000005011 phenolic resin Substances 0.000 claims abstract description 17
- 229920001568 phenolic resin Polymers 0.000 claims abstract description 17
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical group [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims abstract description 15
- 230000002787 reinforcement Effects 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims description 64
- 238000000034 method Methods 0.000 claims description 11
- 230000004224 protection Effects 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 claims description 5
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 claims description 3
- 239000003063 flame retardant Substances 0.000 claims description 3
- 229920003986 novolac Polymers 0.000 claims description 2
- 229920003987 resole Polymers 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 9
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 5
- 238000002679 ablation Methods 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 5
- 238000006731 degradation reaction Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000002360 preparation method Methods 0.000 description 5
- 230000003628 erosive effect Effects 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000008240 homogeneous mixture Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229920002239 polyacrylonitrile Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 238000007171 acid catalysis Methods 0.000 description 1
- 230000016571 aggressive behavior Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- CREMABGTGYGIQB-UHFFFAOYSA-N carbon carbon Chemical compound C.C CREMABGTGYGIQB-UHFFFAOYSA-N 0.000 description 1
- 239000011203 carbon fibre reinforced carbon Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003610 charcoal Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 239000011215 ultra-high-temperature ceramic Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/06—Elements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
- C08J5/0405—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres
- C08J5/042—Reinforcing macromolecular compounds with loose or coherent fibrous material with inorganic fibres with carbon fibres
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
- C08L61/04—Condensation polymers of aldehydes or ketones with phenols only
- C08L61/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/04—Arrangements using dry fillers, e.g. using slag wool
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/02—Plate construction
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F41—WEAPONS
- F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
- F41H5/00—Armour; Armour plates
- F41H5/24—Armour; Armour plates for stationary use, e.g. fortifications ; Shelters; Guard Booths
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/004—Additives being defined by their length
Definitions
- the present invention relates to a new ablative composite material, as well as its preparation process. It also relates to a part of said ablative composite material, the process for preparing said part, as well as the use of said material for thermal protection of the surface of a fuel-propelled munition launcher.
- An ablative material derives its performance from its ability to absorb thermal and aerodynamic flow during the departure of a munition thanks to adapted thermal and mechanical characteristics.
- thermal protection it is essential to identify the properties of the material that will promote energy dissipation during the ablation phenomenon. The more energy a material dissipates as it degrades, the better it will perform. In addition, the material must be a good insulator.
- Ablation is a complex and strongly coupled phenomenon involving chemical, thermal and mechanical mechanisms.
- the heat of ablation can be defined as the energy absorbed per mass of material consumed during ablation. The higher it is, the more energy it takes to degrade the material, or in other words, the less material it takes to protect a surface. It makes sense to seek to maximize it.
- the heat of ablation is directly related to the specific heat, the enthalpies of reaction and the emissivity of the material.
- Ultra-high temperature ceramic materials mainly consist of borides, nitrides, carbides and oxides of metals such as hafnium, zirconium, tantalum or titanium. These elements exhibit particularly high melting temperatures, above 2500 ° C. These are cutting-edge technologies the high cost of which is hardly compatible with use on large surfaces.
- thermosetting resins in particular phenolic resin
- materials based on elastomers as well as ceramic-based materials or materials of the carbon-carbon type.
- the composite material Apart from the case of ceramic composites, it is possible to define the composite material with three main parameters: the resin, the reinforcement and the architecture of the reinforcement. Despite the number of combinations offered by these components, not all fiber-matrix combinations are as efficient as each other. The question of the cohesion of the material is as essential as the individual quality of each element constituting the composite.
- the object of the present invention is therefore to resolve the problems of thermal insulation and of control of degradation during a retained fire or a missile departure fire.
- the present invention relates to an ablative composite material comprising a matrix and a reinforcement, characterized in that:
- the matrix is a phenolic resin or an epoxy resin
- the reinforcement is formed of short carbon fibers with a length of between 0.5 mm and 20 mm, and a diameter of between 6 ⁇ m and 20 ⁇ m.
- the material according to the invention is therefore formed of a matrix and of short carbon fibers as reinforcement.
- the length of the carbon fibers is less than 20 mm.
- the carbon fibers used according to the invention can be obtained from pitch or PAN (polyacrylonitrile) precursors.
- the short carbon fibers have a porosity of less than 15%, preferably less than or equal to 10%, more preferably less than or equal to 5%.
- the material according to the invention can be adapted to be subjected to severe aerothermal stress. Also, it is desirable, even essential, to limit the porosity, in particular the large pores which significantly accelerate the erosion of the material and to ensure that the material is as homogeneous and isotropic as possible. Preferably, the cohesion and density of the charcoal (carbon fibers) are maximized and the pullout sensitivity is limited.
- the matrix of the material of the invention is a phenolic resin.
- Phenolic resins are essentially resins derived from formaldehyde and phenol.
- the phenolic resin is chosen from novolac resins (prepared by acid catalysis) or resols (prepared by basic catalysis).
- the matrix of the material according to the invention is a phenolic matrix of the resole type.
- the matrix of the material of the invention is a phenolic resin (phenolic matrix) and said material comprises a maximum rate of 60% by mass of short carbon fibers as defined above with respect to the mass total of said material, said short carbon fibers preferably exhibiting a porosity of less than 15%.
- the material comprises at least 10% by mass of short carbon fibers as defined above relative to the total mass of said material.
- the matrix of the material of the invention is a phenolic resin and said material comprises from 25% to 40% by mass of short carbon fibers. as defined above with respect to the total mass of said material, said short carbon fibers having a porosity of less than 5%.
- the increase in the content of short carbon fibers makes it possible to increase the conductivity of the material without degrading its ablative properties, which makes it possible to limit the rise in temperature on the front face and to limit the loss of mass without compromising performance insulating material.
- a particularly preferred material according to the invention comprises a phenolic matrix reinforced with 25% by mass of short carbon fibers as defined above, having low porosity, in particular less than 5%.
- the pore size of the carbon fibers is less than 1 mm.
- the matrix of the material of the invention is an epoxy resin.
- the ablative composite material according to the invention comprises a matrix which is an epoxy resin, and comprises a maximum rate of 60% by mass of short carbon fibers as defined above relative to the total mass. of said material, said material having a porosity of less than 15%.
- the material comprises at least 10% by mass of short carbon fibers as defined above relative to the total mass of said material.
- the ablative composite material comprises, as a matrix, an epoxy resin chosen from flame retardant epoxy resins.
- epoxy resins rich in carbon in particular with a carbonaceous residue at 1000 ° C. under nitrogen of between 20% and 80% by mass.
- the material of the invention when the matrix is an epoxy resin, further comprises carbon powder, preferably in a mass content of between 5% and 20% relative to the total mass of said material.
- the present invention also relates to a process for preparing the ablative composite material as defined above, comprising the mixing of the matrix and the reinforcement as defined above.
- the present invention also relates to a process for preparing a part of ablative composite material as defined above.
- This process essentially consists of performing compression molding (mold / mandrel).
- the preparation process and the associated parameters make it possible to control the final quality and the characteristics of the material obtained.
- the method of the invention comprises a step of mixing the matrix and the reinforcement, and a step of compression molding said mixture.
- the present invention also relates to a process for preparing a part of ablative composite material as defined above, comprising a phenolic resin as a matrix.
- the present invention therefore also relates to a process for preparing a part of ablative composite material as defined above, in which the matrix is a phenolic resin, and comprising from 10% to 60% by mass of short carbon fibers by weight. relative to the total mass of said material.
- the manufacturing cycle includes pressurization and temperature of the mixture according to several different cycles (temperature / pressure pairs) to obtain the characteristics required for the material.
- the processing cycle is adapted to the nature of the phenolic resin used.
- the essential parameter for implementation is therefore the coupling between the pressure and the temperature.
- An implementation by compression is imperative to obtain a material meeting the desired performance.
- a homogeneous mixture and a perfect distribution of fibers in the mixture guarantee first-class performance.
- the present invention also relates to a process for preparing a part of ablative composite material as defined above, comprising an epoxy resin as a matrix.
- the present invention therefore also relates to a process for preparing a part of ablative composite material as defined above, in which the matrix is an epoxy resin, and comprising between 10% and 60% by mass of short carbon fibers by weight. relative to the total mass of said material.
- Said method consists of several steps allowing the implementation of the invention.
- the manufacturing cycle includes pressurization and temperature of the mixture according to several different cycles (temperature / pressure couples) making it possible to obtain the characteristics required for the material.
- the processing cycle is adapted to the nature of the epoxy resin used.
- the essential parameter for implementation is therefore the coupling between the pressure and the temperature.
- An implementation by compression is imperative to obtain a material meeting the desired performance.
- a homogeneous mixture and a perfect distribution of fibers in the mixture guarantee first-class performance.
- the present invention also relates to a part of ablative composite material, said material being as defined above.
- the present invention relates to a part of ablative composite material obtained by the aforementioned method.
- the present invention also relates to a method of thermal protection of the surface of a fuel-propelled munition launcher, comprising the application of a part as defined above to said surface.
- the thermal protection method of the invention is intended to protect the firing environment against the releases of ammunition, in particular those propelled by solid fuel.
- the present invention therefore also relates to fuel-propelled munitions launchers, comprising at least one piece of ablative composite material as defined above.
- Example 1 Preparation of a piece of ablative material comprising a phenolic resin
- a piece of material comprising a phenolic resin according to the invention is prepared according to the method described in Table 1 below.
- Example 2 Preparation of a piece of ablative material comprising an epoxy resin
- a piece of material comprising an epoxy resin according to the invention is prepared according to the method described in Table 2 below.
- Inventions based on phenolic and epoxy resins exhibit a homogeneous distribution of carbon fibers without preferential orientation.
- thermo-physical characteristics are shown in the table below.
- the material must degrade in a safe and linear manner. This means that the erosion must be gradual and controlled with good linearity of craterization as the exposure time increases.
- the carbon resulting from the degradation must remain confined to the upper part of the plate and the thermal affectation must not lead to in-depth degradation of the thermal protection.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Reinforced Plastic Materials (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1907377A FR3098220B1 (fr) | 2019-07-03 | 2019-07-03 | Nouveau materiau composite ablatif |
| PCT/EP2020/068686 WO2021001484A1 (fr) | 2019-07-03 | 2020-07-02 | Nouveau matériau composite ablatif |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3994205A1 true EP3994205A1 (fr) | 2022-05-11 |
Family
ID=68733186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20735592.6A Pending EP3994205A1 (fr) | 2019-07-03 | 2020-07-02 | Nouveau matériau composite ablatif |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20220315729A1 (fr) |
| EP (1) | EP3994205A1 (fr) |
| KR (1) | KR20220033487A (fr) |
| FR (1) | FR3098220B1 (fr) |
| WO (1) | WO2021001484A1 (fr) |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5424416B1 (fr) * | 1968-07-02 | 1979-08-21 | ||
| JPS548694B1 (fr) * | 1977-10-28 | 1979-04-18 | ||
| FR2684679B1 (fr) * | 1991-12-05 | 1995-03-17 | Aerospatiale | Matiere a mouler contenant des fibres refractaires, utilisable dans la fabrication de pieces ablatables, procede pour sa fabrication et ses applications. |
| FR2707287B1 (fr) * | 1993-07-05 | 1995-10-06 | Europ Propulsion | Procédé de fabrication d'une pièce en matériau composite comprenant un renfort fibreux consolidé par voie liquide. |
| FR2959237B1 (fr) * | 2010-04-22 | 2014-03-14 | Astrium Sas | Materiau de protection thermique |
| JP2011252238A (ja) * | 2010-05-31 | 2011-12-15 | Teijin Techno Products Ltd | 多孔性パラ型全芳香族ポリアミド繊維 |
| CN107337474B (zh) * | 2017-08-09 | 2019-09-13 | 航天特种材料及工艺技术研究所 | 一种碳基轻质热防护材料及其制备方法和应用 |
-
2019
- 2019-07-03 FR FR1907377A patent/FR3098220B1/fr active Active
-
2020
- 2020-07-02 WO PCT/EP2020/068686 patent/WO2021001484A1/fr not_active Ceased
- 2020-07-02 KR KR1020227002159A patent/KR20220033487A/ko active Pending
- 2020-07-02 US US17/597,298 patent/US20220315729A1/en not_active Abandoned
- 2020-07-02 EP EP20735592.6A patent/EP3994205A1/fr active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| KR20220033487A (ko) | 2022-03-16 |
| FR3098220A1 (fr) | 2021-01-08 |
| US20220315729A1 (en) | 2022-10-06 |
| WO2021001484A1 (fr) | 2021-01-07 |
| FR3098220B1 (fr) | 2022-06-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| STAA | Information on the status of an ep patent application or granted ep patent |
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