JP3272852B2 - Sheet made of carbon fiber carbon composite material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet made of carbon fiber-carbon composite material (hereinafter referred to as C / C composite sheet) having excellent flexibility.

[0002]

2. Description of the Related Art Conventionally, as a sheet, for example, plywood,
Some are made of plastic or FRP. However, these sheets have poor heat resistance and cannot be used in a high-temperature use environment or cannot be used for a long time. In addition, stainless steel, low alloy steel, iron, and the like are mainly used for the metal sheet, but even if it is called a heat-resistant alloy, the strength is significantly reduced and deformed at a temperature exceeding 400 ° C. There is a problem that it cannot be used in such an environment. In addition, even at a temperature exceeding 700 ° C., there is a problem that strength reduction and deformation cannot be used remarkably even in super heat resistant alloys such as Inconel and Hastelloy.

On the other hand, it is known that C / C composites are lightweight, have high strength and elastic modulus, and are resistant to thermal shock. There are three types of directionality of carbon fibers in such C / C composites: unidirectional, bidirectional and isotropic. The unidirectional material is one in which carbon fibers placed in the C / C composite are all arranged in the same direction, and the bidirectional material is one in which carbon fibers in the C / C composite are arranged in two different directions. , The directions are usually mutually perpendicular. Further, the two-way material includes the following two types. One is an alternating stack of unidirectional sheets,
In this, layers perpendicular to each other are alternately arranged, and the direction of carbon fibers in each layer is the same. The second is a laminate of a cloth sheet such as a plain weave, in which carbon fibers are arranged in two directions (normally perpendicular to each other) in each layer, and this layer is laminated. Further, in the isotropic material, carbon fibers in the C / C composite are randomly arranged, and two-dimensionally random,
There are cases where they are three-dimensionally random.

[0004]

However, when a sheet is manufactured from these C / C composites, the following problems occur. That is, since the unidirectional C / C composite sheet has high strength and elastic modulus in the fiber direction, it is difficult to bend in that direction, has poor flexibility, and has extremely low strength in the direction perpendicular to the fiber. If you try to bend it, it will break with a small force.

[0005] Further, the bidirectional C / C composite sheet of the alternating laminate of unidirectional sheets and the laminate of cross sheets such as plain weaves usually has the same ratio of carbon fibers in the two directions. The strength and elastic modulus in the two directions are the same, and because of its own strength and elastic modulus, bending in either direction is difficult to bend and poor in flexibility.

[0006] Further, since the isotropic material C / C composite sheet has the same strength and elastic modulus in any direction, it may be bent in any direction due to its own strength and elastic modulus. It is difficult to bend, and there is a problem that it is destroyed when it is forcibly bent.

An object of the present invention is to provide a C / C composite sheet having high strength, high elastic modulus, light weight, excellent thermal shock resistance, excellent dimensional stability, and sufficient flexibility. That is.

In order to solve the above-mentioned problems, a C / C composite sheet according to the first invention of the present application is a C / C composite sheet having a thickness of 0.1 to 2 mm. Is composed of a composite of a preformed sheet composed of a preformed yarn and a thermoplastic resin yarn that intersect each other, and at least one preformed sheet of the plurality of preformed sheets is replaced with another. Laminated such that the orientation direction of the carbon fibers contained in the preformed yarn in the preformed sheet is different from the preformed sheet,
The number of the other preformed sheets is larger than the number of the preformed sheets stacked so that the orientation directions of the carbon fibers are different, and the preformed sheets stacked so that the orientation directions of the carbon fibers are different from each other. Are disposed between the preformed seats.

The C / C composite sheet of the present invention has a C / C composite sheet manufactured by a conventional method such as an impregnation method or a CVD method.
In addition to the / C composite, a C / C composite preferably obtained by a preformed yarn method can be used.

The C / C composite obtained by the CVD method is obtained by simply forming a carbon fiber in advance and heating it at a high temperature.
Next, the carbon is decomposed and carbonized by a hydrocarbon-based gas to deposit and solidify carbon on the surface.

As a method for obtaining a C / C composite,
There is also a method in which a bundle of carbon fibers, a woven fabric, a nonwoven fabric, or the like is formed into a desired shape with a thermosetting resin such as a phenol resin or an epoxy resin, and then heat-treated in an inert gas atmosphere to carbonize the resin.

[0011] Further, the resin molded body reinforced with carbon fiber is calcined and carbonized, and further, when the resin is carbonized, the decomposition product is released, and pores formed by impregnating the resin with the resin are carbonized. There is also a method of obtaining a C / C composite.

As the carbon fiber used in the C / C composite used in the present invention, a petroleum pitch or a coal tar pitch is used as a raw material to adjust a spinning pitch, melt spinning,
Any of pitch-based carbon fibers obtained by infusibilizing and carbonizing and PAN-based carbon fibers obtained by oxidizing acrylonitrile (co) polymer fibers to flame and carbonizing may be used.

C obtained by the preformed yarn method
/ C composite is particularly preferred, and the preformed yarn is manufactured by the method described in Japanese Patent Application No. 61-182483 filed by the present applicant.

In the preformed yarn, a flexible coating (that is, a sleeve) made of a thermoplastic resin is provided around the carbon fiber bundle.

The carbon fiber bundle used in the preformed yarn has a filament denier in the range of about 0.05 to about 600 and a filament number of about 50 to 300,000.
In particular, the filament has a denier of about 0.25 to about 16
Preferably, the number of filaments is from about 100 to about 48,000, and the thickness of the sleeve is generally about 5 to provide uniform sleeve formation and flexibility of the preformed yarn.
To about 1000 μm, especially about 10 to about 30
It is preferably 0 μm.

Therefore, as a preformed yarn,
A powder having a diameter in the range of about 0.1 to about 10 mm, including powdery pitches and coke powders, which eventually become a matrix contained in the carbon fiber bundle, is suitable.
Those having a thickness of about 5 mm are preferred. By providing the above-mentioned sleeve around the fiber bundle, the reinforcing fiber content of the preformed yarn can be arbitrarily set in a range of about 5 to about 70% by volume to obtain a reinforcing effect and a high quality and uniform molded product. Selected.

In the preformed yarn, the thermoplastic resin used as a flexible sleeve-forming material is a resin that completely dissolves at a molding temperature in post-processing, such as polyamide, polyester, polyethylene, polypropylene, polystyrene, polyvinylidene fluoride, and the like. Examples include polymers such as polyamide imide, polyimide, polyether imide, polyether sulfone, polyether ether ketone, and polyphenylene sulfide. More specifically, as the polyamide, nylon 66, nylon 1
2. Homo or copolymers such as nylon 6/66/12 terpolymer are used. As the polyester, a homopolymer such as polyethylene terephthalate, polybutylene terephthalate, polyethylene-2,6-naphthalate, polyoxyethoxybenzoate, and wholly aromatic polyester, or a copolymer thereof is used.

Next, a relatively thick flexible preformed yarn obtained by coating the obtained carbon fiber bundle with a thermoplastic resin, and a relatively thin thermoplastic resin fiber yarn or a relatively thin carbon fiber bundle are used. One-way preformed sheet is manufactured by weaving one as a warp and the other as a weft.

The preformed sheet is disclosed in Japanese Patent Application No. 63-231791 filed by the present applicant. The thermoplastic resin fiber yarn used as the warp or the weft of the preformed sheet is a resin fiber yarn that is completely melted at a molding temperature in post-processing, for example, polyamide,
Fibers of a polymer such as polyester, polyethylene, polypropylene, polystyrene, polyvinylidene fluoride, polyamide imide, polyimide, polyether imide, polyether sulfone, polyether ether ketone, and polyphenylene sulfide are exemplified. More specifically, as the polyamide fiber, a fiber obtained from a homo or copolymer such as nylon 66, nylon 6, nylon 12, or nylon 6/66/12 terpolymer is used. As the polyester fiber, polyethylene terephthalate is used. A fiber obtained from a homopolymer such as polybutylene terephthalate, polyethylene-2,6-naphthalate, polyoxyethoxybenzoate, or a wholly aromatic polyester, or a copolymer thereof is used. As the thermoplastic resin fiber yarn, a yarn as thin as possible is used. It is preferable to use the preformed yarn having a diameter of 1/5 or less with respect to the preformed yarn. It is preferable because the strength is hardly reduced.

Further, the interwoven ratio between the preformed yarn and the thermoplastic resin fiber varies depending on the ratio between the reinforcing fiber and the thermoplastic resin in the preformed yarn, and also varies depending on the use of the composite material after molding. However, usually, the ratio of the reinforcing fibers in the entire preformed sheet is about 3 to about 7
It is preferable that the amount is about 0% by volume.

Since the preformed yarn has a high strength and a high elastic modulus, it is very difficult to bend in the direction in which the preformed yarn is arranged. However, in a C / C composite, a matrix having a low modulus of elasticity is easy to bend because there is a carbon matrix between the preformed yarns. That is, the preformed sheet is easy to bend in a direction perpendicular to the direction in which the preformed yarns are arranged, but has low strength. Therefore, the C / C composite sheet of the present application has a thickness of 0.1 to 2 mm.
A C / C composite sheet comprising: a composite of a preformed sheet composed of a preformed yarn and a thermoplastic resin yarn intersecting each other; At least one preformed sheet among the preformed sheets is laminated with respect to the other preformed sheets so that the orientation direction of the carbon fibers contained in the preformed yarn in the preformed sheet is different, and the other preform is used. The number of the preformed sheets is larger than the number of the preformed sheets laminated so that the orientation directions of the carbon fibers are different,
And the preformed sheet laminated so that the orientation direction of the carbon fiber is different is arranged between the other preformed sheets, so that the preformed sheet laminated so that the orientation direction of the carbon fiber is different. A sheet having high flexibility in the stacking direction can be obtained.

A preferred embodiment of the first invention of the present application is:
The preformed sheet laminated so that the orientation direction of the other preformed sheet and carbon fiber is different,
The carbon fibers included in each sheet are laminated so that their orientation directions are orthogonal to each other.

Furthermore, in another preferred embodiment of the first invention of the present application, the other preformed sheet and the preformed sheet laminated so that the orientation directions of the carbon fibers are different from each other are included in each other's sheets. The carbon fibers are laminated such that the orientation direction of the carbon fibers is at least 30 degrees.

As described above, the orientation direction of the carbon fibers contained in each of the preformed sheets laminated so that the orientation directions of the carbon fibers are different from that of the other preformed sheet is greater than 0 ° and 90 °. The following can be set, but a particularly preferable range is 30 to 90 degrees. If the angle is 30 degrees or less, the mechanical strength in the bending direction becomes small, and the material is easily broken.

Further, another preferred embodiment of the first invention of the present application is characterized in that the another preformed sheet is made of carbon fiber felt. Thus, the other preformed sheet does not necessarily have to have a preformed yarn having directionality, and can impart flexibility to the C / C composite sheet even if it is isotropic.

In the first invention of the present application, the thickness of the C / C composite sheet is 0.1 to 2 mm. If the thickness of the C / C composite sheet is less than 0.1 mm, it becomes difficult to handle as a product, and if it is 2 mm or more, sufficient flexibility cannot be obtained.

Further, the C / C composite sheet according to the second invention of the present application is a carbon fiber-carbon composite material sheet having a thickness of 0.1 to 2 mm, comprising at least one preformed sheet. The reformed sheet is composed of a warp and a weft of a preformed yarn that intersect each other, and the volume ratio of the warp to the weft is 1: 1.5.
-5.

As described above, the C / C according to the second invention of the present application is described.
The composite sheet is composed of a warp and a weft in which the preformed sheets constituting the sheet intersect with each other. If the volume ratio is more than 1: 1 and not more than 1: 5, flexibility is obtained. Preferably 1: 1.5-5
Is preferable in order to obtain more excellent flexibility.
The warp and weft crossing methods include plain weave crossing and satin weaving crossing. Since the warp has a smaller volume than the weft, the warp has flexibility in the extending direction of the warp. The volume ratio is 1: 1.
If it is smaller than 5, the difference between the amounts of the warp and the weft is small and the sheet is hard to bend. 1:
If it exceeds 5, the mechanical strength in the bending direction becomes too small.

Further, in another preferred embodiment of the second invention of the present application, the ratio of the bending elastic modulus of the preformed sheet in the direction in which the warp extends to the bending elastic modulus in the direction in which the weft extends is one. : 1 and preferably 1: 0.5 to 0.01 from the viewpoint of flexibility.

Further, in another preferred embodiment of the second invention of the present application, the ratio of the bending elastic modulus in the direction in which the warp extends of the preformed sheet to the bending elastic modulus in the direction in which the weft extends is provided. Less than 1: 1, preferably
It is characterized by being 1: 0.5 to 0.01 from the viewpoint of bendability, and being curved to a radius of curvature of 30 mm or more in the weft direction.

If the ratio of the flexural modulus is less than 1: 1, flexibility can be obtained, but 1: 0.5 or less is preferable from the viewpoint of easiness of bending. If the ratio is 1: 0.01 or less, the ratio is too low, which is not preferable because the direction is easily broken. 30mm radius of curvature
It is difficult to make it smaller because of the relationship with the elastic modulus. on the other hand,
Enlarging the radius of curvature is not a problem. In addition, the second
In a preferred embodiment of the present invention, the C / C composite sheet is composed of a composite of a plurality of preformed sheets, and the preformed sheets are arranged such that the orientation directions of carbon fibers in these preformed sheets are the same. Are laminated.

In the second invention of the present application, the thickness of the C / C composite sheet is 0.1 to 2 mm. If the thickness of the C / C composite sheet is less than 0.1 mm, it becomes difficult to handle as a product, and if it is 2 mm or more, sufficient flexibility cannot be obtained. As long as the thickness of the C / C composite sheet is in this range, the C / C composite sheet is composed of a composite of a plurality of preformed sheets, and the carbon fiber in the preformed sheet is oriented in the same direction. If the preformed sheets are laminated, the C / C composite sheet may be composed of a composite of a plurality of preformed sheets.

Further, in another preferred embodiment of the second invention of the present application, a C / C composite sheet characterized in that a carbon fiber felt is provided on at least one surface of the C / C composite sheet. As described above, even when the isotropic sheet is provided on at least one surface of the preformed sheet, the C / C composite sheet can be given flexibility.

The sheets obtained in this manner are stacked on a C / C composite sheet as a final product by a required number of sheets, and the sheets are hot-pressed at a temperature of about 300 to about 900 ° C. and a normal pressure of about 300 kg / cm ² . Mold under pressure. If the temperature is lower than 300 ° C., carbonization of the matrix is not sufficiently performed, and a molded article is not sufficiently produced. If the pressure is 300 kg / cm ² or more, the shape of the molded product may be lost, and a large-scale apparatus is required, which is not preferable.

In particular, 300 ° C. or higher, preferably 500 ° C.
As described above, when the hot press treatment is performed, almost no volatile components remain in the molded body, and therefore, there is almost no gas generation even after the graphitization treatment. A composite material having sufficient mechanical strength can be obtained without repeating the treatment and the graphitization treatment.

Next, the molded product obtained by the hot pressing method is carbonized at a temperature of about 700 to about 1200 ° C., and then graphitized at a temperature of about 1500 to about 3000 ° C. to obtain a C / C composite. Furthermore, besides C / C composite,
For the purpose of preventing oxidation, preventing carburization, smoothing the surface, etc., a C / C composite substrate having a surface coated with various coatings can also be used.

The coating includes SiC, TiC, Z
rC, WC, TiN, ZrN, AlN, BN, Si ₃ N
_{4, Al 2 O 3, TiO} 2, Cr 2 O 3, SiO 2 or the like ceramics such, Cr, Zr, Ti, Si, metals such as B, glasses, can be used glassy carbon.

As a coating method, CVD is used.
Method, PVD method, ion plating, sputtering, thermal spraying, aqueous glass coating, laser evaporation method,
Conventional methods such as plasma spraying, plating lining, and painting can be used, and the coating can be applied to a C / C composite substrate (preformed sheet) before forming a final product sheet, It may be applied after obtaining the C composite sheet.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Will be described in detail. However, "orthogonal", "30 degrees",
“45 °” and “60 °” in the preformed sheet
Orientation of carbon fiber contained in preformed yarn
It means the angle between them.Example 1  Preformed yarn by preformed yarn method
Manufacture and use this to form a preformed sheet (Japanese Patent Application
No. 0-276640). Its preformed
Two sheets are stacked so that they are orthogonal to each other.
Calcination was performed at 000 ° C. to obtain a C / C composite sheet.
FIG. 1 shows an exploded configuration diagram thereof. The resulting C / C composite
The characteristics of the cut sheet are as follows. Density 1.6g / cm³  Thickness 1.2mm Flexural strength 33kgf / mm²  Flexural modulus 8000kgf / mm²  Maximum bending amount (limit diameter) Diameter 300mm

Example 2 A preformed sheet was produced in the same manner as in Example 1. Five layers of the preformed sheets were laminated so as to be orthogonal to each other, and fired at 2000 ° C. to obtain a C / C composite sheet. FIG. 2 shows an exploded configuration diagram thereof. The properties of the obtained C / C composite sheet are as follows. Density 1.6 g / cm ³ Thickness 2.0 mm Flexural strength 30 kgf / mm ² Flexural modulus 7200 kgf / mm ² Maximum bending amount (limit diameter) Diameter 500 mm

Example 3 A preformed sheet was produced in the same manner as in Example 1. Two layers of such preformed sheets are laminated so that two layers are perpendicular to each other and the other layer is further perpendicular to two layers.
Calcination was performed at 000 ° C. to obtain a C / C composite sheet.
FIG. 3 shows an exploded configuration diagram thereof. The properties of the obtained C / C composite sheet are as follows. Density 1.6 g / cm ³ Thickness 2.0 mm Flexural strength 30 kgf / mm ² Flexural modulus 7200 kgf / mm ² Maximum bending amount (limit diameter) Diameter 500 mm

Example 4 A preformed sheet was produced in the same manner as in Example 1. Five such preformed sheets were laminated in a manner that five parallel layers were stacked on the central layer so that they were orthogonal to each other.
It was fired at 00 ° C. to obtain a C / C composite sheet. FIG. 4 shows an exploded configuration diagram thereof. The properties of the obtained C / C composite sheet are as follows. Density 1.6 g / cm ³ Thickness 2.0 mm Flexural strength 40 kgf / mm ² Flexural modulus 9600 kgf / mm ² Maximum bending amount (limit diameter) Diameter 500 mm

Example 5 In the same manner as in Example 1, two types of preformed sheets having different thicknesses (basis weights) were produced. The thicker preformed sheet (basis weight is 800 g / m ² ) is placed in the center, and the thinner preformed sheet (basis weight is 600 g / m ² ).
g / m ² ) as a surface layer sheet was fired at 2000 ° C. by laminating three layers so that they were orthogonal to each other to obtain a C / C composite sheet. FIG. 5 shows an exploded configuration diagram thereof.
The properties of the obtained C / C composite sheet are as follows. Density 1.6 g / cm ³ Thickness 1.1 mm Flexural strength 30 kgf / mm ² Flexural modulus 7000 kgf / mm ² Maximum bending amount (limit diameter) Diameter 280 mm

Example 6 Two types of preformed sheets having different thicknesses (basis weights) were produced in the same manner as in Example 1. The thinner preformed sheet (basis weight is 700 g / m ² ) is placed in the center, and the thicker formed sheet (basis weight is 850 g / m ² ).
m ² ) as the surface layer sheet, 3
The laminate was fired at 2000 ° C. to obtain a C / C composite sheet. FIG. 6 shows an exploded configuration diagram thereof. The properties of the obtained C / C composite sheet are as follows. Density 1.6 g / cm ³ Thickness 1.3 mm Flexural strength 35 kgf / mm ² Flexural modulus 8500 kgf / mm ² Maximum bending amount (limit diameter) Diameter 320 mm

Example 7 A preformed sheet was produced in the same manner as in Example 1. Such preformed sheets are laminated in three layers at an angle of 30 ° to each other and fired at 2000 ° C. to obtain a C / C
A composite sheet was obtained. FIG. 7 shows an exploded configuration diagram thereof. The properties of the obtained C / C composite sheet are as follows. Density 1.6 g / cm ³ Thickness 1.2 mm Bending strength 48 kgf / mm ² Flexural modulus 11500 kgf / mm ² Maximum bending amount (limit diameter) Diameter 300 mm

Example 8 A preformed sheet was produced in the same manner as in Example 1. The preformed sheet is laminated at a 45 ° angle in three layers and fired at 2000 ° C.
A composite sheet was obtained. FIG. 8 shows an exploded configuration diagram thereof. The properties of the obtained C / C composite sheet are as follows. Density 1.6 g / cm ³ Thickness 1.2 mm Flexural strength 45 kgf / mm ² Flexural modulus 10 800 kgf / mm ² Maximum bending amount (limit diameter) Diameter 300 mm

Example 9 A preformed sheet was produced in the same manner as in Example 1. The pre-formed sheets are laminated at three angles so as to form an angle of 60 ° with each other, and are fired at 2000 ° C. to obtain a C / C.
A composite sheet was obtained. FIG. 9 shows an exploded configuration diagram thereof. The properties of the obtained C / C composite sheet are as follows. Density 1.6 g / cm ³ Thickness 1.2 mm Flexural strength 42 kgf / mm ² Flexural modulus 10,000 kgf / mm ² Maximum bending amount (limit diameter) Diameter 300 mm

Example 10 A preformed yarn was produced in the same manner as in Example 1. A plain woven preformed sheet was manufactured using such a preformed yarn such that the ratio of warp to weft was 3: 2. A laminate of one of these preformed sheets is 2
Calcination was performed at 000 ° C. to obtain a C / C composite sheet.
FIG. 10 shows an exploded configuration diagram thereof. The properties of the obtained C / C composite sheet are as follows. Density 1.6 g / cm ³ Thickness 0.4 mm Flexural strength 30 kgf / mm ² Flexural modulus 7200 kgf / mm ² Maximum bending amount (limit diameter) Diameter 150 mm

Example 11 A preformed yarn was produced in the same manner as in Example 1. A plain woven preformed sheet was manufactured using such a preformed yarn such that the ratio of warp to weft was 2: 1. A laminate of two of these preformed sheets is
Calcination was performed at 000 ° C. to obtain a C / C composite sheet.
FIG. 11 shows an exploded configuration diagram thereof. The properties of the obtained C / C composite sheet are as follows. Density 1.6 g / cm ³ Thickness 0.8 mm Bending strength 33 kgf / mm ² Flexural modulus 8000 kgf / mm ² Maximum bending amount (limit diameter) Diameter 200 mm

Example 12 A preformed yarn was produced in the same manner as in Example 1. A plain woven preformed sheet was manufactured using such a preformed yarn such that the ratio of warp to weft was 3: 1. A laminate of three preformed sheets is 2
Calcination was performed at 000 ° C. to obtain a C / C composite sheet.
FIG. 12 shows an exploded configuration diagram thereof. The properties of the obtained C / C composite sheet are as follows. Density 1.6 g / cm ³ Thickness 1.2 mm Flexural strength 38 kgf / mm ² Flexural modulus 9000 kgf / mm ² Maximum bending amount (limit diameter) Diameter 300 mm

Example 13 A preformed yarn was produced in the same manner as in Example 1. A satin-woven preformed sheet was produced using such a preformed yarn such that the ratio of warp to weft was 2: 1. A laminate of three of the preformed sheets was fired at 2000 ° C. to obtain a C / C composite sheet. FIG. 13 shows an exploded configuration diagram thereof. The properties of the obtained C / C composite sheet are as follows. Density 1.6 g / cm ³ Thickness 1.2 mm Flexural strength 33 kgf / mm ² Flexural modulus 8000 kgf / mm ² Maximum bending amount (limit diameter) Diameter 300 mm

Example 14 A preformed sheet was produced in the same manner as in Example 1. The preformed sheet having the felts of the upper and lower carbon fibers in the center is fired at 2000 ° C.
A C composite sheet was obtained. FIG.
Shown in The properties of the obtained C / C composite sheet are as follows:
It is as follows. Density 1.6 g / cm ³ Thickness 1.4 mm Flexural strength 17 kgf / mm ² Flexural modulus 4000 kgf / mm ² Maximum bending amount (limit diameter) Diameter 350 mm However, the bending strength of the C / C composite sheet in the above examples The measurement of the elastic modulus was performed according to JIS K7014.

[0053]

As described above, the C / C composite sheet according to the present invention has high strength, high elastic modulus, light weight, excellent thermal shock resistance, excellent dimensional stability, and sufficient flexibility. Because it has the property, the sheet is stretched inside and / or outside of heat insulating materials and heat-resistant structural materials of all shapes,
The heat insulating material can be prevented from deteriorating, strengthening the strength, preventing the heat resistant structural material from deteriorating, and preventing the heat insulating material from scattering due to thermal shock.

[Brief description of the drawings]

FIG. 1 is an exploded view showing a configuration of a C / C composite sheet according to a first embodiment of the present invention,

FIG. 2 is an exploded view of a C / C composite sheet according to a second embodiment of the present invention, showing its configuration;

FIG. 3 is an exploded view of a C / C composite sheet according to a third embodiment of the present invention, showing its configuration;

FIG. 4 is an exploded view of a C / C composite sheet according to a fourth embodiment of the present invention, showing its structure;

FIG. 5 is an exploded view of a C / C composite sheet according to a fifth embodiment of the present invention, showing its configuration;

FIG. 6 is an exploded view of a C / C composite sheet according to a sixth embodiment of the present invention, showing its configuration;

FIG. 7 is an exploded view of a C / C composite sheet according to a seventh embodiment of the present invention, showing the configuration thereof;

FIG. 8 is an exploded view of the configuration of a C / C composite sheet according to an eighth embodiment of the present invention,

FIG. 9 is an exploded view of a C / C composite sheet according to a ninth embodiment of the present invention, showing the configuration thereof;

FIG. 10 is a C / C diagram of a tenth embodiment of the present invention.
A diagram showing the structure of the composite sheet disassembled,

FIG. 11 is a C / C diagram of an eleventh embodiment of the present invention.
A diagram showing the structure of the composite sheet disassembled,

FIG. 12 is a C / C diagram of a twelfth embodiment of the present invention.
A diagram showing the structure of the composite sheet disassembled,

FIG. 13 is a C / C diagram of a thirteenth embodiment of the present invention.
A diagram showing the structure of the composite sheet disassembled,

FIG. 14 is a C / C diagram of a fourteenth embodiment of the present invention.
A diagram showing the structure of the composite sheet disassembled,

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-51-14969 (JP, A) JP-A-6-263537 (JP, A) JP-A-6-116031 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) B32B 1/00-35/00 C04B 35/00-35/71

Claims (9)

(57) [Claims] 1. A sheet made of a carbon fiber carbon composite material having a thickness of 0.1 to 2 mm, wherein the sheet is formed of a preformed yarn and a thermoplastic resin yarn that intersect each other. It is composed of a composite, and at least one of the plurality of preformed sheets is a carbon fiber contained in the preformed yarn in the preformed sheet with respect to another preformed sheet. Laminated so that the orientation directions are different, the number of the other preformed sheets is greater than the number of the preformed sheets laminated so that the orientation directions of the carbon fibers are different, and the orientation directions of the carbon fibers are different. The laminated preformed sheet is disposed between the other preformed sheets. Carbon fiber carbon composite material made of a sheet. 2. The carbon fiber-carbon composite material sheet according to claim 1, wherein the other preformed sheet and the preformed sheet laminated so that the orientation directions of the carbon fibers are different from each other are included in each other's sheets. A carbon fiber / carbon composite material sheet, wherein the carbon fibers are laminated such that the orientation directions of the carbon fibers are orthogonal to each other. 3. The carbon fiber carbon composite material sheet according to claim 1, wherein the other preformed sheet and the preformed sheet laminated so that the orientation directions of the carbon fibers are different from each other are included in each other's sheets. A carbon fiber-carbon composite material sheet, wherein the carbon fibers are laminated so that the orientation direction of the carbon fibers is at least 30 degrees. 4. The carbon fiber carbon composite material sheet according to claim 1, wherein the other preformed sheet is made of carbon fiber felt. 5. A sheet made of carbon fiber and carbon composite material having a thickness of 0.1 to 2 mm, comprising at least one preformed sheet, wherein said preformed sheet is provided with a warp of a preformed yarn crossing each other. A carbon fiber-carbon composite material sheet comprising a weft yarn, wherein a volume ratio of the warp to the weft is 1: 1.5 to 5. 6. The carbon fiber-carbon composite material sheet according to claim 5, wherein the preformed sheet has a flexural modulus in a direction in which the warp extends and a flexural modulus in a direction in which the weft extends. Is 1: 0.5-
A sheet made of a carbon fiber carbon composite material, which is 0.01. 7. The sheet according to claim 6, wherein a radius of curvature is 30 in the weft direction.
A sheet made of carbon fiber carbon composite material, characterized in that the sheet can be curved to at least mm. 8. The carbon fiber-carbon composite material sheet according to claim 5, wherein the carbon fiber-carbon composite material sheet is formed of a composite of a plurality of preformed sheets. A sheet made of a carbon fiber carbon composite material, wherein the preformed sheets are laminated so that the orientation directions of the carbon fibers in the preformed sheet are the same. 9. The carbon fiber-carbon composite material sheet according to claim 5, wherein a carbon fiber felt is provided on at least one surface of the carbon fiber-carbon composite material sheet. Sheet made of carbon fiber carbon composite material.