JP2009127116A - Method for producing metal matrix carbon fiber-reinforced composite material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a metal matrix carbon fiber-reinforced composite material where the shape of a carbon fiber-reinforced material is free, and the type of a carbon fiber-reinforced material can be freely selected. <P>SOLUTION: In Fig.(a), a metal-impregnated body 35 is discharged from a high pressure vessel 31 together with a solidified molten metal, and in Fig.(b), to the metal-impregnated body 35, parts 28a, 28a of a carbon fiber-reinforced carbon composite material 28 are cut as shown in arrows (2), (2). In Fig.(c), the remainders 28b, 28b of the remaining carbon fiber-reinforced carbon composite material 28 are stripped off at the parts of arrows (3), (3), so as to obtain a metal matrix carbon fiber-reinforced composite material 36 as shown in Fig.(d). Even in a carbon fiber base material easy to deform, by surrounding the same with a carbon fiber hardened laminate enough in rigidity, its rigidity as the whole can be secured. In this way, the type of a carbon fiber base material can be optionally selected, and the shape thereof can be freely set as well. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an improvement in a method for producing a metal-based carbon fiber reinforced composite material obtained by combining a carbon fiber reinforcing material with a metal.

A metal-based carbon fiber reinforced composite material is a composite material that combines both the properties of a metal and the properties of carbon fiber by reinforcing the base metal with carbon fibers. Various manufacturing methods that can be applied to such metal-based carbon fiber reinforced composite materials have been proposed. Among them, a production method in which a carbon fiber reinforcing material is impregnated with a metal is known (for example, see Patent Document 1).
JP 2004-322172 A (6th page, FIG. 3)

Patent document 1 is demonstrated based on the following figure.
FIG. 9 is a diagram for explaining the basic principle of the conventional technique. As shown in FIG. 9A, a cylindrical carbon fiber reinforcing material 102 is erected on a support plate 101. The carbon fiber reinforcing material 102 is fixed to the support plate 101 using a refractory binder 103. Then, it is stored in a container 104 whose upper surface is open.

  As shown in (b), molten metal 106 is poured into the container 104. The molten metal 106 is injected until the carbon fiber reinforcing material 102 dies. Next, the piston 107 is fitted into the container 104, and the piston 107 is lowered. The pressure of the molten metal 106 is increased by the pressing action of the piston 107. The higher the pressure of the molten metal 106, the quicker the carbon fiber reinforcement 102 can penetrate.

  Next, by cooling the whole, as shown in (c), the metal-based carbon fiber reinforced composite material 109 surrounded by the solidified metal 108 can be obtained. That is, by removing from the container 104, removing the solidified metal 108, and removing the refractory binder 103 and the support plate 101, the metal-based carbon fiber reinforced composite material 109 shown in (d) can be obtained.

By the way, the carbon fiber reinforcing material 102 shown in (a) is obtained by impregnating carbon fiber with a resin and curing it by heat treatment, and then performing a heat treatment to carbonize the cured resin to make it porous and increase heat resistance. It is a thing.
In this case, when the metal-based carbon fiber reinforced composite material is used, since the resin is carbonized in addition to the metal as the base material, the metal-based carbon fiber reinforced composite material having an arbitrary three-dimensional shape has high strength. Is difficult.

On the other hand, if the carbon fiber base material is made of only carbon fibers, the base material can be made only of metal and high strength can be achieved, but it can be easily deformed by its own weight or external force. A composite material cannot be obtained.
Further, since the carbon fiber reinforcing material 102 is required to have a certain degree of heat resistance, the type of the carbon fiber reinforcing material 102 is also limited.
That is, according to the conventional technique, there is a limitation on the shape and type of the carbon fiber reinforcing material, and a technique capable of relaxing this limitation is required.

  An object of the present invention is to provide a method for producing a metal-based carbon fiber reinforced composite material in which the shape of the carbon fiber reinforcing material is free and the type of the carbon fiber reinforcing material can be freely selected.

The invention according to claim 1 is a method for producing a metal-based carbon fiber reinforced composite material obtained by combining a carbon fiber reinforcing material with a metal as a base material.
A carbon fiber base material to be a base of the metal base carbon fiber reinforced composite material and a carbon fiber prepreg obtained by impregnating carbon fiber with a resin are prepared separately from the base material, and the carbon fiber base material is a core. So as to obtain a laminate that is sandwiched between the carbon fiber prepregs and deformed to prepare a desired shape;
A step of obtaining a carbon fiber cured laminate by heat-treating the laminate to cure the resin in the carbon fiber prepreg and increase the strength;
The graphitized carbon fiber substrate is obtained by placing the carbon fiber cured laminate that has become easy to handle into a high-temperature furnace to graphitize the carbon fiber substrate and carbonizing the resin in the carbon fiber cured laminate. Obtaining an intermediate in a form covered with a carbon fiber reinforced carbon composite;
A metal-impregnated body in which the intermediate body is impregnated with a metal by bringing the molten metal into contact with the intermediate body and impregnating the graphitized carbon fiber base material with the molten metal that has passed through the carbon fiber-reinforced carbon composite material. Obtaining
And removing the carbon fiber reinforced carbon composite material from the metal impregnated body to obtain a metal-based carbon fiber reinforced composite material obtained by combining the carbon fiber reinforced material with the metal.

In the invention according to claim 1, the carbon fiber base material is surrounded by the carbon fiber prepreg. The carbon fiber prepreg is heated to cure the resin in the carbon fiber prepreg and impart rigidity. Even if the carbon fiber base material is easily deformed, the rigidity can be ensured as a whole by enclosing it with a rigid carbon fiber laminate. Thereby, the kind of carbon fiber base material can be chosen arbitrarily, and a shape can also be set freely.
The carbon fiber cured laminate is treated with a high temperature in a high-temperature furnace, so that the resin is carbonized to become a porous body, and the presence of the carbon fiber cured laminate is a composite material so that molten metal can pass through in a subsequent process. There will be no hindrance to the manufacture of At the same time, since the carbon fiber base material is graphitized to improve heat resistance, the type of the carbon fiber base material can be freely selected also in this respect.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is an explanatory view from the step of obtaining a laminate to the step of obtaining a carbon fiber cured laminate, and as shown in FIG. 1 (a), a lower carbon fiber prepreg 11, a lower graphite sheet 12, and a carbon fiber substrate 13 are shown. Then, an upper graphite sheet 14 and an upper carbon fiber prepreg 15 are prepared.

The lower carbon fiber prepreg 11 is a member that plays the role of a protective case (protective type) for the carbon fiber base material 13. For example, high-elasticity carbon fibers are plain-woven or twill-woven with 6 filaments, and the fiber direction is An appropriate amount of phenol resin is impregnated on 10 sheets of 0 ° and 90 ° alternately stacked.
The resin to be impregnated is preferably a phenol resin having a high residual carbon ratio because it is necessary to maintain strength when fired into a carbon fiber reinforced carbon composite material.
The lower graphite sheet 12 is a member that plays a role of a release material, and is, for example, a sheet of about 0.2 mm.

The carbon fiber base material 13 is a main member that is a base of the carbon fiber reinforcing material in the metal-based carbon fiber reinforced composite material of the present invention. For example, a high elastic carbon fiber is plain-woven or twill-woven with 6 filaments. The fiber direction is 0 ° and 90 °, and 10 layers are alternately stacked.
The carbon fiber base material has a higher strength when the remaining carbon ratio when fired becomes a metal-based carbon fiber reinforced composite material. The carbon fiber base material may be a carbon fiber, but is preferably one obtained by applying and impregnating an acrylic resin in consideration of moldability.

The upper graphite sheet 14 may be the same as the lower graphite sheet 12.
The upper carbon fiber prepreg 15 may be the same as the lower carbon fiber prepreg 11.

  As shown in (b), a laminate 16 formed by laminating the lower carbon fiber prepreg 11, the lower graphite sheet 12, the carbon fiber base material 13, the upper graphite sheet 14 and the upper carbon fiber prepreg 15 is put into an autoclave 17. . The autoclave 17 is a vacuum heating furnace provided with a heater 18 and an exhaust device 19. The laminated body 16 is heated, for example, under conditions of 100 ° C. and 2 hours under a pressure of 0.6 MPa, and subsequently heat-treated under conditions of 150 ° C. and 1.5 hours under a pressure of 0.6 MPa.

  By heating at 100 to 150 ° C. for a total of 3.5 hours, the upper carbon fiber prepreg 15 hangs down as shown by an imaginary line and comes into contact with the lower carbon fiber prepreg 11 to be integrated. In parallel, the resin contained in the carbon fiber prepregs 11 and 15 is appropriately cured. As a result, the carbon fiber cured laminate 21 can be obtained.

FIG. 2 is an explanatory view of a process for obtaining an intermediate. As shown in FIG. 2A, the carbon fiber cured laminate 21 is put into a high temperature furnace 25 equipped with a heater 22, an exhaust device 23, and a gas blowing pipe 24. Then, carbonization treatment and graphitization treatment are performed.
In the carbonization treatment, evacuation is performed by the exhaust device 23, argon gas is then blown by the gas blowing pipe 24, the temperature is raised to 1000 ° C. over 6 hours by the heater 22, and 30 minutes when the temperature reaches 1000 ° C. Hold.
In the graphitization treatment, the temperature is raised to 2000 ° C. over 8 hours in an argon gas atmosphere, and when it reaches 2000 ° C., it is held for 30 minutes.

(B) is an enlarged view of part b of (a), and the resin in the carbon fiber cured laminate is carbonized by the high temperature treatment, and becomes a carbon fiber reinforced carbon composite material 28 together with the carbon fibers 26.
That is, the carbon fiber is graphitized and the resin in the carbon fiber cured laminate is carbonized to obtain an intermediate 29 in a form in which the graphitized carbon fiber base material 27 is covered with the carbon fiber reinforced carbon composite material 28. be able to.

FIG. 3 is an explanatory diagram of a process for obtaining a metal-impregnated body. As shown in FIG. 3A, the intermediate body 29 is transferred to the high-pressure vessel 31 whose upper surface is open. Then, the inside of the high-pressure vessel 31 is placed in a nitrogen gas atmosphere, heated to 750 ° C. over 90 minutes, and the molten metal 33 of aluminum is poured from the pan 32 there.
Next, as shown in (b), the piston 34 is fitted into the high-pressure vessel 31, and the piston 34 is lowered so that the pressure of the molten metal 33 becomes 50 to 100 MPa in a nitrogen gas atmosphere. Then, the molten metal 33 passes through the carbon fiber reinforced carbon composite material 28 and impregnates the center graphitized carbon fiber substrate 27 as indicated by arrows (1) and (1).

FIG. 4 is an explanatory view of a process for obtaining a metal-based carbon fiber reinforced composite material. As shown in FIG. 4A, the metal impregnated body 35 is taken out from the high-pressure vessel 31 together with the solidified molten metal.
And as shown to (b), part 28a, 28a of the carbon fiber reinforced carbon composite material 28 is cut out with respect to the metal impregnated body 35 as shown by arrows (2) and (2).
Next, as shown in (c), the remaining portions 28b and 28b of the remaining carbon fiber reinforced carbon composite material 28 are removed at the portions indicated by arrows (3) and (3).

  As a result, the metal-based carbon fiber reinforced composite material 36 shown in (d) can be obtained. Needless to say, the metal-based carbon fiber reinforced composite material 36 is a composite material made of aluminum as a base material and reinforced with carbon fibers.

  The metal-based carbon fiber reinforced composite material 36 obtained by the above manufacturing method is a flat plate-shaped material. In the method of the present invention, a metal-based carbon fiber reinforced composite material having a curved shape such as a cylinder can also be obtained. A specific example will be described below as another embodiment.

  FIG. 5 is an explanatory view from the step of obtaining a laminate according to another example to the step of obtaining a carbon fiber cured laminate, and as shown in (a), the lower carbon fiber prepreg 11, the lower graphite sheet 12, A carbon fiber substrate 13, an upper graphite sheet 14, an upper carbon fiber prepreg 15, and a winding die 15a are prepared.

  And it winds so that the type | mold 15a for winding may become a core, and the laminated body 16 shown to (b) is obtained.

  Next, as shown in (c), the laminate 16 is put into an autoclave 17. The autoclave 17 is a vacuum heating furnace provided with a heater 18 and an exhaust device 19. The laminated body 16 is heated, for example, under conditions of 100 ° C. and 2 hours under a pressure of 0.6 MPa, and subsequently heat-treated under conditions of 150 ° C. and 1.5 hours under a pressure of 0.6 MPa.

The resin contained in the carbon fiber prepregs 11 and 15 is appropriately cured by heating at 100 to 150 ° C. for a total of 3.5 hours. As a result, the carbon fiber cured laminate 21 can be obtained.
From the autoclave 17, the carbon fiber cured laminate 21 cured together with the winding mold 15 a is taken out, and the winding mold 15 a is pulled out to obtain a cylindrical carbon fiber cured laminate 21.

FIG. 6 is an explanatory view of a process of obtaining an intermediate according to another embodiment. As shown in FIG. 6A, a high temperature furnace 25 equipped with a heater 22, an exhaust device 23, and a gas blowing tube 24 is cured with carbon fiber. The laminated body 21 is thrown in and carbonization and graphitization are performed.
In the carbonization treatment, evacuation is performed by the exhaust device 23, argon gas is then blown by the gas blowing pipe 24, the temperature is raised to 1000 ° C. over 6 hours by the heater 22, and 30 minutes when the temperature reaches 1000 ° C. Hold.
In the graphitization treatment, the temperature is raised to 2000 ° C. over 8 hours in an argon gas atmosphere, and when it reaches 2000 ° C., it is held for 30 minutes.

(B) is an enlarged view of part b of (a), and the resin in the carbon fiber prepreg is carbonized by the high temperature treatment, and becomes a carbon fiber reinforced carbon composite material 28 together with the carbon fibers 26.
That is, the carbon fiber is graphitized and the resin in the carbon fiber prepreg is carbonized to obtain an intermediate 29 in a form in which the graphitized carbon fiber base material 27 is sandwiched between the carbon fiber reinforced carbon composite materials 28 and 28. be able to.

FIG. 7 is an explanatory view of a process for obtaining a metal impregnated body according to another embodiment. As shown in FIG. 7A, the intermediate body 29 is transferred to the high-pressure vessel 31 having an open upper surface. Then, the inside of the high-pressure vessel 31 is placed in a nitrogen gas atmosphere, heated to 750 ° C. over 90 minutes, and a molten metal 33 of aluminum is poured from the pan 32 into the high-pressure vessel 31.
Next, as shown in (b), the piston 34 is fitted into the high-pressure vessel 31, and the piston 34 is lowered so that the pressure of the molten metal 33 becomes 50 to 100 MPa in a nitrogen gas atmosphere. Then, the molten metal 33 passes through the carbon fiber reinforced carbon composite materials 28 and 28 as indicated by arrows (4) and (4), and impregnates the center graphitized carbon fiber base material 27. Thus, the metal impregnated body 35 can be obtained.

  FIG. 8 is an explanatory view of a process for obtaining a metal-based carbon fiber reinforced composite material according to another embodiment. (A) The metal impregnated body 35 is applied to a press machine, and arrows (5), (5), (5), ( As in 5), the carbon fiber reinforced carbon composites 28, 28 are peeled off.

  As a result, the cylindrical metal-based carbon fiber reinforced composite material 36 shown in (b) can be obtained. The metal-based carbon fiber reinforced composite material 36 is, for example, a cylinder having an inner diameter of 110 mm, a thickness of 2 mm, and a height of 100 mm, and is a composite material reinforced with aluminum and a carbon fiber as a base material. Yes.

  As is apparent from the above description, in the present invention, the carbon fiber base material is surrounded by the carbon fiber prepreg. The carbon fiber prepreg is heated to cure the resin in the carbon fiber prepreg and impart rigidity. Even if the carbon fiber base material is easily deformed, the rigidity can be ensured as a whole by enclosing it with a rigid carbon fiber laminate. Thereby, the kind of carbon fiber base material can be chosen arbitrarily, and a shape can also be set freely.

(Experimental example)
Experimental examples according to the present invention will be described below. Note that the present invention is not limited to experimental examples.

○ Common conditions for sample 1 to sample 6:
The lower carbon fiber prepreg (hereinafter referred to as the lower prepreg) is a high elastic carbon fiber, a filament number of 6, a plain weave, a carbon fiber having a cloth basis weight of 215 g / m ² (a plain weave used is a “high elastic carbon fiber A In this case, a sheet obtained by laminating 10 sheets of phenol resin at a content rate of 35% and laminating 10 sheets under the condition of the laminating method 0 ° / 90 ° is used.

The carbon fiber base material is a high elastic carbon fiber A (high elastic carbon fiber, 6 filaments, plain weave, carbon fiber with a cloth basis weight of 215 g / m ² ) and a resin such as phenol resin (type and content of resin) Is impregnated in Table 1), and a sheet obtained by laminating 10 sheets under the condition of the laminating method 0 ° / 90 ° is used.
-The upper carbon fiber prepreg (hereinafter, upper prepreg) is the same as the lower prepreg.
-A manufacturing method is based on the method shown in FIGS.

○ Conditions for sample 7:
The lower prepreg is obtained by impregnating high elastic carbon fiber A (high elastic carbon fiber, filament number 6, plain weave, carbon fiber with a cloth basis weight of 215 g / m ² ) with a phenol resin content of 35%. 10 sheets are laminated under the condition of the laminating method 0 ° / 90 °.

The carbon fiber base material is a high-strength carbon fiber, a filament number of 6, a twill weave, and a carbon fiber having a cloth basis weight of 220 g / m ² (the one using a twill weave is called “high-strength carbon fiber B”). A sheet obtained by impregnating a resin such as a phenol resin (the type and content of the resin is shown in Table 1) and laminating 10 sheets obtained under a laminating method of 0 ° / 90 ° is used.
・ The upper prepreg is the same as the lower prepreg.
-A manufacturing method is based on the method shown in FIGS.

  The conditions such as the conditions and tensile strength in the samples 1 to 7 described above are shown in the following table.

-Since the sample 1 did not impregnate the carbon fiber base material with resin, the residual carbon ratio is 0% after the graphitization treatment. The molten aluminum was impregnated at 100 MPa. The tensile strength of the composite material obtained by peeling off the carbon fiber reinforced carbon composite material was 560 MPa.
In sample 2, a carbon fiber base material was impregnated with 35% by mass of a phenol resin. After the graphitization treatment, the residual carbon ratio was about 50%. The molten aluminum was impregnated at 100 MPa. The tensile strength of the composite material obtained by peeling off the carbon fiber reinforced carbon composite material was 340 MPa.
In sample 3, a carbon fiber base material was impregnated with 35% by mass of an epoxy resin. After the graphitization treatment, the residual carbon ratio was about 30%. The molten aluminum was impregnated at 100 MPa. The tensile strength of the composite material obtained by peeling off the carbon fiber reinforced carbon composite material was 430 MPa.
From Samples 1 to 3, it was confirmed that the strength decreased as the amount of residual carbon increased.

In sample 4, a carbon fiber base material was impregnated with 15% by mass of an acrylic resin. After the graphitization treatment, the residual carbon ratio was almost 0%. The molten aluminum was impregnated at 100 MPa. The tensile strength of the composite material obtained by peeling off the carbon fiber reinforced carbon composite material was 560 MPa.
By setting the content of the acrylic resin to 15% by mass, the residual carbon could be almost 0%, and high tensile strength could be obtained.

In sample 5, a carbon fiber base material was impregnated with 15% by mass of an acrylic resin. After the graphitization treatment, the residual carbon ratio was almost 0%. The molten aluminum was impregnated at 50 MPa. The tensile strength of the composite material obtained by peeling off the carbon fiber reinforced carbon composite material was 530 MPa.
When the casting pressure was lowered from 100 MPa to 50 MPa for Sample 4, high strength could be obtained although the pressure was slightly reduced.

In sample 6, a carbon fiber base material was impregnated with 15% by mass of an acrylic resin. Heat treatment was performed at 1000 ° C. After the graphitization treatment, the residual carbon ratio was almost 0%. The molten aluminum was impregnated at 50 MPa. The tensile strength of the composite material obtained by peeling off the carbon fiber reinforced carbon composite material was 110 MPa.
Since the heat treatment temperature was 1000 ° C., graphitization of the carbon fiber substrate was incomplete or insufficient, and heat resistance was insufficient, so that sufficient strength could not be obtained.

Sample 7 was a carbon fiber substrate impregnated with 15% by mass of acrylic resin. After the graphitization treatment, the residual carbon ratio was almost 0%. The molten aluminum was impregnated at 50 MPa. The tensile strength of the composite material obtained by peeling off the carbon fiber reinforced carbon composite material was 530 MPa.
Sample 7 uses high-strength carbon fiber having low heat resistance as a carbon fiber base material compared to sample 5, but the heat resistance is improved by the graphitization treatment in the present invention, and the metal-based carbon fiber reinforced composite material has high strength. It became possible to get.

○ Common conditions for Sample 8 to Sample 10:
The lower prepreg is obtained by impregnating high elastic carbon fiber A (high elastic carbon fiber, filament number 6, plain weave, carbon fiber with a cloth basis weight of 215 g / m ² ) with a phenol resin content of 35%. 10 sheets are laminated under the condition of the laminating method 0 ° / 90 °.

The carbon fiber base material is impregnated with a high elastic carbon fiber A (high elastic carbon fiber, filament number 6, plain weave, carbon fiber with a cloth basis weight of 215 g / m ² ) with an acrylic resin content of 15%, A sheet obtained by laminating 10 sheets under the condition of the laminating method 0 ° / 90 ° is used.
・ The upper prepreg is the same as the lower prepreg.
-A manufacturing method is based on the method shown in FIGS.

○ Conditions for sample 11:
The lower prepreg is obtained by impregnating high elastic carbon fiber A (high elastic carbon fiber, filament number 6, plain weave, carbon fiber with a cloth basis weight of 215 g / m ² ) with a phenol resin content of 35%. 10 sheets are laminated under the condition of the laminating method 0 ° / 90 °.

The carbon fiber base material is impregnated with high strength carbon fiber B (high strength carbon fiber, filament number 6, twill weave, carbon fiber with a cloth basis weight of 220 g / m ² ) with an acrylic resin content of 15%. A sheet obtained by laminating 10 sheets under the condition of the laminating method 0 ° / 90 ° is used.
・ The upper prepreg is the same as the lower prepreg.
-A manufacturing method is based on the method shown in FIGS.

  The conditions and evaluations for Samples 8 to 11 described above are shown in the following table.

-Sample 8 was impregnated with molten aluminum at 100 MPa. When the composite material obtained by peeling off the carbon fiber reinforced carbon composite material was observed, the impregnation of aluminum was good. However, cracks were observed in the obtained product.
-Sample 9 was impregnated with molten aluminum at 75 MPa. When the composite material obtained by peeling off the carbon fiber reinforced carbon composite material was observed, the impregnation of aluminum was good. However, cracks were observed in the obtained product.
-Sample 10 was impregnated with molten aluminum at 50 MPa. When the composite material obtained by peeling off the carbon fiber reinforced carbon composite material was observed, both the impregnation condition of aluminum and the appearance of the product were good.
According to Samples 8 to 10, it was found that the casting pressure was not good if it was too high.

-Sample 11 was impregnated with molten aluminum at 50 MPa. When the composite material obtained by peeling off the carbon fiber reinforced carbon composite material was observed, both the impregnation condition of aluminum and the appearance of the product were good.
Sample 11 uses high-strength carbon fiber with low heat resistance as a carbon fiber base material, but the heat resistance is improved by the graphitization treatment in the present invention, so that there is a difference in the impregnation condition of aluminum and the appearance of the product. There wasn't.

  In addition, although the manufacturing method of the metal-based carbon fiber reinforced composite material of the present invention is applied to the cylindrical shape in the embodiment, it can be applied as much as possible to the desired shape by sandwiching the carbon fiber base material with the carbon fiber prepreg and deforming it. It can be applied to other shapes.

  It is suitable for producing the metal-based carbon fiber reinforced composite material of the present invention.

It is explanatory drawing from the process of obtaining a laminated body to the process of obtaining a carbon fiber hardening laminated body. It is explanatory drawing of the process of obtaining an intermediate body. It is explanatory drawing of the process of obtaining a metal impregnation body. It is explanatory drawing of the process of obtaining a metal-based carbon fiber reinforced composite material. It is explanatory drawing from the process of obtaining the laminated body which concerns on another Example to the process of obtaining a carbon fiber hardening laminated body. It is explanatory drawing of the process of obtaining the intermediate body which concerns on another Example. It is explanatory drawing of the process of obtaining the metal impregnation body which concerns on another Example. It is explanatory drawing of the process of obtaining the metal group carbon fiber reinforced composite material which concerns on another Example. It is a figure explaining the basic principle of the prior art.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11, 15 ... Prepreg (carbon fiber prepreg), 13 ... Carbon fiber base material, 16 ... Laminated body, 21 ... Carbon fiber hardening laminated body, 25 ... High temperature furnace, 27 ... Graphitized carbon fiber base material, 28 ... Carbon fiber reinforcement Carbon composite material, 29 ... intermediate, 33 ... molten metal, 35 ... metal impregnated body, 36 ... metal-based carbon fiber reinforced composite material.

Claims (1)

In the method for producing a metal-based carbon fiber reinforced composite material obtained by combining a carbon fiber reinforcing material with a metal as a base material,
A carbon fiber base material to be a base of the metal base carbon fiber reinforced composite material and a carbon fiber prepreg obtained by impregnating carbon fiber with a resin are prepared separately from the base material, and the carbon fiber base material is a core. So as to obtain a laminate that is sandwiched between the carbon fiber prepregs and deformed to prepare a desired shape;
A step of obtaining a carbon fiber cured laminate by heat-treating the laminate to cure the resin in the carbon fiber prepreg and increase the strength;
The graphitized carbon fiber substrate is obtained by placing the carbon fiber cured laminate that has become easy to handle into a high-temperature furnace to graphitize the carbon fiber substrate and carbonizing the resin in the carbon fiber cured laminate. Obtaining an intermediate in a form covered with a carbon fiber reinforced carbon composite;
A metal-impregnated body in which the intermediate body is impregnated with the metal by bringing the molten metal into contact with the intermediate body and impregnating the graphitized carbon fiber base material with the molten metal that has passed through the carbon fiber-reinforced carbon composite material. Obtaining
A metal-based carbon comprising a step of obtaining a metal-based carbon fiber reinforced composite material obtained by compounding a carbon fiber reinforced material with a metal by removing the carbon fiber-reinforced carbon composite material from the metal-impregnated body. A method for producing a fiber-reinforced composite material.

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