JP2017088913A - Method for producing complex of aluminum and carbon particle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a complex of aluminum and carbon particles which can shorten a tact time.SOLUTION: A method for producing a complex comprises steps for temporarily sintering a sintering material comprising aluminum and carbon particles to obtain a temporarily sintered body 7, and finally sintering the temporarily sintered body 7a by hot plastic working.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a method for producing a composite of aluminum and carbon particles.

  As a composite material of metal and carbon particles, for example, as described in Patent Document 1 (Japanese Patent No. 5150905) and Patent Document 2 (Japanese Patent Laid-Open No. 2015-25158), metal layers and carbon fiber layers are alternately formed. There are known ones that are joined and integrated in a stacked state. Patent Document 3 (Japanese Patent No. 5659542) discloses a metal matrix composite material in which a carbonaceous member is filled with a metal.

  Such a composite material is expected to be used as a material for a member that requires high heat conduction characteristics.

Japanese Patent No. 5150905 Japanese Patent Laying-Open No. 2015-25158 Japanese Patent No. 5659542

  Thus, when a composite of metal and carbon particles is manufactured by sintering a sintered material such as a preform containing the metal and carbon particles, in order to firmly sinter the sintered material. The sintering process is desirably performed by setting the sintering temperature at a high temperature, the sintering pressure at a high pressure, and the sintering time at a long time, and the tact time is long.

  The present invention has been made in view of the above-described technical background, and an object thereof is to provide a method for producing a composite of aluminum and carbon particles capable of shortening the tact time.

  The present invention provides the following means.

[1] A step of pre-sintering a sintered material containing aluminum and carbon particles to obtain a pre-sintered body;
And a step of subjecting the temporary sintered body to main sintering by hot plastic working, and a method for producing a composite of aluminum and carbon particles.

  [2] In the main sintering step, the temporary sintered body is subjected to main sintering by hot plastic working so that the plastic working rate is 30% or more. Production method.

[3] In the step of obtaining the temporary sintered body, the sintered material is temporarily sintered by at least one method selected from the group consisting of hot extrusion, hot rolling, hot pressing, and spark plasma sintering. And
3. The method for producing a composite of aluminum and carbon particles according to item 1 or 2, wherein, in the main sintering step, the temporary sintered body is main sintered by hot forging as hot plastic working.

  [4] The composite of aluminum and carbon particles according to any one of [1] to [3], wherein, in the main sintering step, the temporary sintered body is main sintered by hot hermetic forging as hot plastic working. Body manufacturing method.

[5] The temporary sintered body is one in which the carbon particles in the temporary sintered body are oriented.
Item 5 or 4 above, wherein in the main sintering step, the forging direction to the temporary sintered body is set to the orientation direction of the carbon particles in the temporary sintered body, and the temporary sintered body is main sintered. Of producing a composite of aluminum and carbon particles.

  The present invention has the following effects.

  According to the preceding item [1], in order to produce a composite, the temporary sintered body obtained by presintering the sintered material is subjected to main sintering by hot plastic working, so the tact time is shortened. Can do. Thereby, the manufacturing cost of a composite_body | complex can be reduced.

  In the preceding item [2], the temporary sintered body can be surely sufficiently fully sintered by subjecting the temporary sintered body to main sintering by hot plastic working so that the plastic working rate becomes 30% or more. In addition, the strength of the resulting composite can be reliably increased.

  In the preceding item [3], the sintered material is pre-sintered by at least one method (means) selected from the group consisting of hot extrusion, hot rolling, hot press and spark plasma sintering. The sintered material can be surely pre-sintered.

  Further, by subjecting the temporary sintered body to main sintering by hot forging, the composite can be easily formed into an arbitrary shape.

  In the preceding item [4], the yield rate of the composite can be increased by subjecting the temporary sintered body to main sintering by hot hermetic forging.

  In the preceding item [5], the forging direction to the temporary sintered body is set to the orientation direction of the carbon particles in the temporary sintered body, and the temporary sintered body is main-sintered, thereby combining aluminum and carbon particles. Can be reliably promoted, and a composite having low physical properties can be reliably obtained.

FIG. 1A is a perspective view showing an example of a sintered material of a composite of aluminum and carbon particles according to an embodiment of the present invention. FIG. 1B is an enlarged view of a portion X1 in FIG. 1A. FIG. 2A is a perspective view showing another example of a sintered material of a composite of aluminum and carbon particles according to another embodiment of the present invention. FIG. 2B is an enlarged view of a portion X2 in FIG. 2A. FIG. 3 is a side view in the middle of temporarily sintering a sintered material by hot extrusion. FIG. 4 is a perspective view in the middle of cutting the temporary sintered body obtained in FIG. 3. FIG. 5 is a cross-sectional view during the main sintering of the cut temporary sintered body obtained in FIG. 4 by hot hermetic forging. 6 is an enlarged cross-sectional view of the composite obtained in FIG. FIG. 7 is a perspective view in the middle of pre-sintering a sintered material by hot rolling. FIG. 8 is a perspective view in the middle of cutting the temporary sintered body obtained in FIG. FIG. 9 is a cross-sectional view during the main sintering of the cut temporary sintered body obtained in FIG. 8 by hot hermetic forging.

  Next, several embodiments of the present invention will be described below with reference to the drawings.

  A method for producing a composite of aluminum and carbon particles according to an embodiment of the present invention includes a step of pre-sintering a sintered material to obtain a pre-sintered body, And a step of sintering.

  First, the process of obtaining a temporary sintered body will be described below.

  The sintered material 5 contains aluminum and carbon particles. The sintered material 5 is not limited to the kind as long as it contains aluminum and carbon particles, and in particular, the carbon particle layer 2 on the long aluminum foil 1 as shown in FIGS. 1A and 1B. As shown in FIGS. 2A and 2B, a preform 5A formed by winding a long coating foil 3 formed by coating in a roll shape (referred to as “roll-type preform 5A” for convenience of explanation). A preform 5B formed by laminating a plurality of coating foils 3 each having a carbon particle layer 2 coated on an aluminum foil 1 (this is referred to as “laminated preform 5B” for convenience of explanation) or illustrated. However, it is desirable to be a sintered material containing aluminum powder and carbon powder in a mixed state (referred to as “powder mixed type sintered material” for convenience of explanation).

  A sintered material containing aluminum powder and carbon powder in a mixed state is a preform formed into a predetermined shape in a state where aluminum powder and carbon powder are mixed (this is referred to as “powder mixed type preform” for convenience of explanation) )including.

  Furthermore, the sintered material 5 may have other forms.

  The type of the carbon particles 2a is not limited, and in particular, one type of carbon particles selected from the group consisting of carbon fibers, carbon nanotubes, graphene, natural graphite powder, and artificial graphite powder, or two or more types of mixed carbon particles Furthermore, it is desirable that they are one type of carbon particles or two or more types of mixed carbon particles selected from the group consisting of carbon fibers, carbon nanotubes, graphene, and natural graphite powder. The reason is that the composite of aluminum and carbon particles can be reliably performed, and a composite having high thermal conductivity can be reliably obtained.

  As the carbon fiber, pitch-based carbon fiber, PAN-based carbon fiber, or the like is used.

  As the carbon nanotube, a single-walled carbon nanotube, a multi-walled carbon nanotube, a vapor grown carbon fiber (VGCF (registered trademark)), or the like is used.

  As graphene, single layer graphene, multilayer graphene, or the like is used.

  As the natural graphite powder, scaly graphite powder (eg, highly heat conductive scaly graphite powder) or the like is used.

  As the artificial graphite powder, isotropic graphite powder, anisotropic graphite powder, pyrolytic graphite powder and the like are used.

  The size of the carbon particles 2a is not limited. When the carbon particles 2a are carbon fibers, short carbon fibers having an average fiber length of 10 μm to 2 mm are particularly preferably used. When the carbon particles 2a are carbon nanotubes, carbon nanotubes having an average length of 1 μm to 10 μm are particularly preferably used. When the carbon particles 2a are natural graphite powder and artificial graphite powder, natural graphite powder and artificial graphite powder having an average particle diameter of 10 μm to 3 mm are particularly preferably used.

  The kind of aluminum is not limited, and in particular, pure aluminum alloy (A1000 alloy) or high purity aluminum having a purity of 3N or more is desirable in terms of easy hot plastic working. A particularly desirable aluminum is high purity aluminum.

  In the roll type preform 5A shown in FIG. 1A and the laminated type preform 5B shown in FIG. 2A, for example, carbon fibers (specifically, short carbon fibers) are used as the carbon particles 2a.

  The method (means) for presintering the sintered material 5 is not limited as long as it is a method (means) capable of presintering the sintered material 5, and in particular, hot extrusion, hot rolling, It is desirable to be at least one hot plastic working method (hot plastic working means) selected from the group consisting of hot pressing and spark plasma sintering. This is because the sintered material 5 can be surely pre-sintered.

  A desirable temporary sintering method for the sintered material 5 when the sintered material 5 is temporarily sintered by hot extrusion is as follows.

  The roll-type preform 5A shown in FIG. 1A as the sintered material 5 is used as an extrusion billet (extrusion material), and as shown in FIG. 3, this is a hot extrusion device (more specifically, a hot forward extrusion device). The preform 5A is preliminarily sintered into a rod shape by hot extruding with 10 to obtain a rod-like temporary sintered body 7A. The cross-sectional shape of the temporary sintered body 7A is not limited and is, for example, a circular shape.

  When the carbon particles 2a included in the preform 5A are carbon fibers, the fiber direction of the carbon fibers included in the temporary sintered body 7A obtained by hot extrusion of the preform 5A is oriented in the extrusion direction B. To do. Therefore, the orientation direction A of the carbon particles (carbon fibers) 2a in the temporary sintered body 7A is the length direction (that is, the extrusion direction B) of the temporary sintered body 7A.

  The temporary sintering conditions (that is, hot extrusion processing conditions) in the case of pre-sintering the preform 5A by hot extrusion are not limited, and in particular, the extrusion temperature is 400 ° C. or higher and lower than 550 ° C., and the pressing ratio is 2 or higher. Is preferred. The preferable upper limit of the pressing ratio is not limited and is usually 100.

  As the sintered material 5, a laminated preform 5B shown in FIG. 2A or a powder mixed preform (not shown) may be used instead of the roll preform 5A.

  A desirable temporary sintering method for the sintered material 5 when the sintered material 5 is temporarily sintered by hot rolling is as follows.

  The laminated preform 5B shown in FIG. 2A as the sintered material 5 is transferred from, for example, both rolling rollers 12a and 12a by a hot rolling apparatus 12 having a pair of rolling rollers 12a and 12a as shown in FIG. By subjecting the preform 5B to hot rolling so as to apply a compressive force in the stacking direction, the preform 5B is temporarily sintered into a plate shape, thereby obtaining a plate-like temporary sintered body 7B. Reference sign “C” in FIG. 7 indicates the rolling direction of the preform 5B. This rolling direction C coincides with the length direction of the temporary sintered body 7B.

  The pre-sintering conditions (that is, hot-rolling process conditions) when pre-sintering the preform 5B by hot rolling are not limited, and in particular, the hot rolling temperature is 400 ° C. or more and less than 550 ° C., the reduction rate. 30% or more is preferable. The preferable upper limit of the rolling reduction is not limited and is usually 90%.

  As the sintered material 5, a roll type preform 5A shown in FIG. 1A, a powder mixed type preform (not shown), or the like may be used instead of the laminated type preform 5B.

  The temporary sintering conditions (that is, hot pressing conditions) when the sintered material 5 is temporarily sintered by the hot press method are not limited, and in particular, the sintering temperature is 200 ° C. or higher and lower than 550 ° C., the applied pressure is 2 MPa or higher and 30 MPa. The following is preferred. In this case, the roll type preform 5A shown in FIG. 1A may be used as the sintered material 5, the laminated type preform 5B shown in FIG. 2A may be used, or a powder mixed type sintered material ( (Including powder mixed type preform) (not shown) or the like may be used.

  The temporary sintering conditions (that is, the discharge plasma sintering conditions) when the sintered material 5 is temporarily sintered by the discharge plasma sintering method are not limited. In particular, the sintering temperature is 200 ° C or higher and lower than 550 ° C. The pressure is preferably 2 MPa or more and 30 MPa or less. In this case, the roll type preform 5A shown in FIG. 1A may be used as the sintered material 5, the laminated type preform 5B shown in FIG. 2A may be used, or a powder mixed type sintered material ( (Including powder mixed type preform) (not shown) or the like may be used.

  Next, the process of carrying out the main sintering will be described below.

  The hot plastic working for main sintering the temporary sintered body 7 (7A, 7B) is not limited as long as it is a method (means) capable of main sintering the temporary sintered body 7. It is desirable to be at least one hot plastic working method (hot plastic working means) selected from the group consisting of hot extrusion, hot rolling and hot forging. The reason is that the plastic working rate to the temporary sintered body 7 can be easily increased.

  In particular, the hot plastic working is desirably hot forging. The reason is that the composite 9 can be easily formed into an arbitrary shape, and therefore the composite 9 can be easily formed into a desired product shape. Further, it is desirable that the hot forging process is a hot hermetic forging process. The reason is that the yield rate of the composite 9 can be reliably increased.

  A desirable main sintering method of the temporary sintered body 7 in the case where the temporary sintered body 7 is subjected to main sintering by hot hermetic forging is as follows.

  When the temporary sintered body 7 is a rod-shaped temporary sintered body 7A obtained by hot-extruding a sintered material 5 (more specifically, a roll-type preform 5A) as shown in FIG. For example, as shown in FIG. 4, a rod-shaped temporary sintered body 7A is cut into slices to a predetermined thickness as needed (shearing is described in detail), whereby a disk as a forging material is cut from the temporary sintered body 7A. A cylindrical or columnar cut temporary sintered body 7Aa is cut out. The cutting direction of the temporary sintered body 7A is generally set in a direction that intersects the length direction of the temporary sintered body 7A.

  Then, as shown in FIG. 5, the cut temporary sintered body 7 </ b> Aa is plastically processed into the target product shape by the hot sealed forging device 15 and the cut temporary sintered body 7 </ b> Aa is formed. The cut pre-sintered body 7Aa is subjected to main sintering by hot plastic working (more specifically, hot hermetic forging) so that the main sintering is performed. As a result, as shown in FIG. 6, a composite 9 having a desired product shape is obtained.

  As shown in the figure, the obtained composite 9 is in a state in which carbon particles 2a as a reinforcing material are dispersed in aluminum 1a as a base (matrix). When the carbon particle 2a is a carbon fiber, particularly when the carbon particle 2a is a carbon fiber, the composite 9 will be described in detail as a carbon fiber reinforced aluminum group composite or a carbon fiber reinforced aluminum group. It is a composite material.

  The direction of the carbon particles 2a in the composite 9 (e.g., the fiber direction of the carbon fibers) is disordered by hot plastic working of the cut temporary sintered body 7Aa in the main sintering step. Therefore, the degree of orientation of the carbon particles 2a in the composite 9 is low.

  When the temporary sintered body 7 is a plate-like temporary sintered body 7B obtained by hot rolling a sintered material 5 (more specifically, a laminated preform 5B) as shown in FIG. For example, as shown in FIG. 8, the plate-like temporary sintered body 7B is cut into a slice shape to a predetermined thickness as necessary (shearing in detail), whereby the temporary sintered body 7B is used as a forging material. Cut pre-sintered body 7Ba is cut out. The cutting direction of the temporary sintered body 7B is generally set in a direction that intersects the length direction of the temporary sintered body 7B (that is, the rolling direction C of the preform 5B).

  Then, as shown in FIG. 9, the cut temporary sintered body 7 </ b> Ba is plastically processed into the target product shape by using the hot hermetic forging device 15. The cut pre-sintered body 7Ba is finally sintered by performing hot plastic working (more specifically, hot hermetic forging) so that the main sintering is performed. As a result, as shown in FIG. 6, a composite 9 having a desired product shape is obtained.

  As shown in FIGS. 5 and 9, the hot hermetic forging device 15 described above includes a female die 16 having a molding cavity 16a and a male die (eg, a press punch) 17 corresponding to the molding cavity 16a. . When the cut temporary sintered body 7a (7Aa, 7Ba) is forged, the cut temporary sintered body 7a is disposed in the molding cavity 16a of the female die 16. Then, the cut pre-sintered body 7a is hermetically sealed with the male mold 17 by being pressed in the predetermined forging direction F by the male mold 17 while the cut pre-sintered body 7a is heated to a predetermined forging temperature. Then, a hot sealed forging process is performed in the molded cavity 16a, whereby the composite body 9 having a shape corresponding to the shape of the sealed molded cavity 16a is molded.

  The plastic working rate in the case of subjecting the cut temporary sintered body 7a to main sintering by hot plastic working is not limited, and is preferably 30% or more. The reason is that the cut temporary sintered body 7a can be surely sufficiently sintered and the strength of the resulting composite 9 can be reliably increased. Furthermore, a desirable plastic working rate is 50% or more. The upper limit value of the desired plastic working rate is not limited and is usually 90%.

  The plastic processing temperature in the case of subjecting the cut temporary sintered body 7a to main sintering by hot plastic processing is not limited, and is particularly preferably 550 ° C. or higher. The reason is that the cut temporary sintered body 7a can be surely and easily plastically processed, and the cut temporary sintered body 7a can be surely sufficiently sintered. A more desirable plastic working temperature is 600 ° C. or higher. The upper limit value of the desired plastic working temperature is not limited and is usually 640 ° C.

  When the cut temporary sintered body 7a is the one in which the carbon particles 2a included in the cut temporary sintered body 7a are oriented, that is, the cut temporary sintered body 7a includes the carbon particles 2a in a state in which the carbon particles 2a are oriented. When the forging direction F to the cut temporary sintered body 7a is set to the orientation direction A of the carbon particles 2a in the cut temporary sintered body 7a, the cut temporary sintered body 7a is hot forged or It is desirable to perform main sintering by hot hermetic forging. The reason is that the composite of the aluminum 1a and the carbon particles 2a can be surely promoted, and the physical properties (e.g., heat This is because the composite 9 having low orientation in terms of conductivity, linear expansion coefficient, and mechanical strength can be obtained with certainty.

  The angle formed by the forging direction F with respect to the orientation direction A of the carbon particles 2a in the cut pre-sintered body 7a is desirably small, particularly preferably set to 45 ° or less, and more preferably set to 30 ° or less. Highly desirable.

  According to the manufacturing method of the composite body 9 of the aluminum 1a and the carbon particles 2a of the present embodiment, in order to manufacture the composite body 9, the temporary sintered body 7 ( Since the preliminarily sintered cut sintered body 7a) is sintered by hot plastic working, the tact time can be shortened. Thereby, the composite 9 can be manufactured at low cost.

  Since the manufactured composite 9 contains the carbon particles 2a, it has high thermal conductivity (that is, high thermal conductivity) and high strength. Therefore, the composite 9 includes at least one constituent layer (eg, wiring layer, stress buffer) among a plurality of constituent layers constituting an insulating substrate (eg, power module substrate) on which a heat generating element such as an electronic element is mounted. Layer) or a material thereof.

  Although several embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications can be made without departing from the scope of the present invention.

  In addition, the present invention may be configured by combining two or more technical matters disclosed in the embodiment.

  Specific examples and comparative examples of the present invention are shown below. However, the present invention is not limited to the following examples.

<Example 1>
A long coated foil 3 was obtained by coating a carbon fiber layer 2 as a carbon particle layer on one side of the long aluminum foil 1. The thickness of the aluminum foil 1 was 20 μm, and the material of the aluminum foil 1 was high-purity aluminum having a purity of 3N. The carbon fibers 2a as carbon particles contained in the carbon fiber layer 2 are pitch-based carbon fibers (more specifically, pitch-based short carbon fibers), and the coating amount of the carbon fibers 2a contained in the carbon fiber layer 2 is 20 g / m. ² .

  Subsequently, the rolled coating foil 3 was wound into a roll shape to form an extruded billet-shaped roll-type preform 5A. The preform 5A was extruded as a billet and hot extruded in the axial direction of the preform 5A by the hot extrusion apparatus 10 to obtain a rod-like temporary sintered body 7A having a circular cross section. The extrusion temperature applied to this hot extrusion process was 500 ° C., and the pressing ratio was 10.

  Next, the disk-shaped cut temporary sintered body 7Aa as a plastic material is temporarily cut by shearing the temporary sintered body 7A in a slice shape to a predetermined thickness with a shear blade in a direction perpendicular to the length direction. It cut out from the sintered compact 7A. The thickness of the cut temporary sintered body 7Aa was 2 mm, and the orientation direction A of the carbon fibers 2a in the cut temporary sintered body 7Aa coincided with the thickness direction of the cut temporary sintered body 7Aa.

  Next, the forging direction F to the cut temporary sintered body 7Aa is set parallel to the orientation direction A of the carbon fibers 2a in the cut temporary sintered body 7Aa (that is, the thickness direction of the cut temporary sintered body 7Aa). The sintered body 7Aa was subjected to main sintering by hot hermetic forging so that the thickness thereof was reduced from 2 mm to 1 mm, thereby obtaining a composite 9 of aluminum 1a and carbon fibers 2a. The forging temperature applied to this hot sealed forging was 600 ° C. In addition, since the cut temporary sintered body 7Aa was subjected to hot hermetic forging so that the thickness of the cut temporary sintered body 7Aa was reduced from 2 mm (initial thickness) to 1 mm (thickness after processing), The plastic working rate of the sintered body 7Aa is {(“initial thickness” − “post-thickness”) / “initial thickness”} × 100% = {(2 mm−1 mm) / 2 mm} × 100% = 50% Met.

  The obtained composite 9 had good heat conduction characteristics and high strength.

<Example 2>
A powder mixed sintered material made of a mixed powder in which an aluminum powder and a flaky graphite powder were mixed was prepared. The compounding ratio of the flaky graphite powder to the sintered material was 15% by volume. Then, the sintered material was pre-sintered by a discharge plasma sintering method to obtain a pre-sintered body. The temporary sintering temperature applied to this discharge plasma sintering method was 400 ° C., and the pressure applied to the sintered material was 20 MPa.

  Subsequently, the disk-shaped cut temporary sintered body as a plastic material was cut out from the temporary sintered body by cutting the temporary sintered body to a predetermined thickness. The thickness of the cut temporary sintered body was 2 mm, and the orientation direction of the scaly graphite particles in the cut temporary sintered body was consistent with the thickness direction of the cut temporary sintered body.

  Next, the forging direction to the cut pre-sintered body is set in parallel to the orientation direction of the scaly graphite particles in the cut pre-sintered body (that is, the thickness direction of the cut pre-sintered body). The main sintering was performed by hot hermetic forging so that the thickness decreased from 2 mm to 1 mm, thereby obtaining a composite of aluminum and scaly graphite particles. The forging temperature applied to this hot sealed forging was 600 ° C. In addition, since the cut temporary sintered body was hot sealed forged so that the thickness of the cut temporary sintered body was reduced from 2 mm (initial thickness) to 1 mm (thickness after processing), the cut temporary sintered body The plastic working rate of the body was {(2 mm-1 mm) / 2 mm} × 100% = 50%.

  The resulting composite had good heat conduction properties and high strength.

<Comparative example>
The same cut temporary sintered body as that of Example 1 was prepared. Then, the cut temporary sintered body was heated by a hot press method so that the cut temporary sintered body was not plastically processed, thereby obtaining a composite of aluminum and carbon fiber. The heating temperature to the cut temporary sintered body applied at this time was 600 ° C., and the heating time was 1 min.

  The resulting composite was not fully sintered and was broken with a slight stress.

  The present invention can be used in a method for producing a composite of aluminum and carbon particles.

1: Aluminum foil 1a: Aluminum 2: Carbon particle layer 2a: Carbon particle 3: Coating foil 5: Sintered material 5A, 5B: Preform 7: Temporary sintered body 7a: Cut temporary sintered body 9: Aluminum and carbon Composite with particles 10: Hot extrusion processing device 12: Hot rolling processing device 15: Hot sealed forging device A: Orientation direction F of carbon particles in the cut pre-sintered body: Forging into the pre-sintered body direction

Claims (5)

A step of pre-sintering a sintered material containing aluminum and carbon particles to obtain a pre-sintered body;
And a step of subjecting the temporary sintered body to main sintering by hot plastic working, and a method for producing a composite of aluminum and carbon particles.   2. The method for producing a composite of aluminum and carbon particles according to claim 1, wherein, in the main sintering step, the temporary sintered body is subjected to main sintering by hot plastic working so that a plastic working rate is 30% or more. . In the step of obtaining the presintered body, the sintering material is presintered by at least one method selected from the group consisting of hot extrusion, hot rolling, hot press and discharge plasma sintering,
3. The method for producing a composite of aluminum and carbon particles according to claim 1, wherein in the main sintering step, the temporary sintered body is subjected to main sintering by hot forging as hot plastic working.   The composite of aluminum and carbon particles according to any one of claims 1 to 3, wherein in the main sintering step, the temporary sintered body is subjected to main sintering by hot sealed forging as hot plastic working. Production method. The temporary sintered body is one in which the carbon particles in the temporary sintered body are oriented.
5. The main sintering is performed by setting the forging direction to the temporary sintered body to the orientation direction of the carbon particles in the temporary sintered body in the main sintering step. The manufacturing method of the composite_body | complex of aluminum and carbon particle of description.

Images