Composite material manufacturing equipments

Disclosed is a composite material manufacturing equipment including a raw material cylinder, an oil hydraulic piston and a rotating mold. The raw material cylinder has a raw material chamber, a material inlet and a material outlet, the raw material chamber can be filled with a substrate and a reinforcing phase material. The oil hydraulic piston is arranged at a side of the material inlet of the raw material cylinder for pushing the substrate and the reinforcing phase material to move towards the material outlet. The rotating mold is arranged at a side of the material outlet of the raw material cylinder, and includes an outer mold and a rotating flow channel inside the outer mold, the outer mold can rotationally rub the substrate to plasticize the substrate, the rotating flow channel can disperse and mix the plasticized substrate and the reinforcing phase material to form a composite material.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the priority of Taiwanese patent application No. 111119553, filed on May 25, 2022, which is incorporated herewith by reference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present application relates to a manufacturing equipment, and more particularly, to a composite material manufacturing equipment.

2. The Prior Arts

As the development of science and technology and the rising of environmental consciousness, the requirements for properties, such as electrical conductivity, thermal conductivity, mechanical strength, weather resistance, manufacturing cost, of materials in industrial fields, such as electrical engineering, electronics, chemical engineering, transportation, mechanics, are also getting higher and higher. Taking conductive materials as an example, copper has an electrical conductivity higher than that of aluminum, but has poor mechanical strength and poor high-temperature deformation resistance; while taking the casing material of aircraft as an example, aluminum has low density, high strength and high ductility, but has poor corrosion resistance and poor impact resistance; therefore, in the prior arts, the composite materials with required properties are manufactured by means of alloys, additives, heat treatment, etc.

The composite materials are made of continuous phase matrix (such as metal, alloy and polymer) and reinforcing phase materials, which have the advantages of both metal and reinforcing phase materials. Taking metal matrix composites as example, powder metallurgy and mold casting are often used to manufacture metal matrix composites in the industries. In the powder metallurgy, the metal matrix composites are formed mainly by mixing powders of metal and reinforcing phase materials by a mechanical mean, and then processing the mixed materials by methods such as pressureless sintering, vacuum hot pressing sintering, high pressure torsion, hot extrusion, hot rolling.

FIG.1schematically illustrates a conventional composite material manufacturing equipment. As shown inFIG.1, to manufacture the metal matrix composite by a conventional composite material manufacturing equipment1includes following steps of: filling a powdered metal matrix M and a powdered reinforcing phase material S in two barrels11,12, respectively; feeding the powdered metal matrix M and the powdered reinforcing phase material S into a heating device14by a suction machine13; heating and stirring the powdered metal matrix M and the powdered reinforcing phase material S to form a slurry P of composite material in the heating device14; and spraying the slurry P into a pressure casting mold16to form a metal matrix composite C.

However, surface properties of the reinforcing phase material of nanoscale are different from those of the continuous phase matrix, so that the reinforcing phase material is hard to be uniformly dispersed in the matrix, and thus the composite material thereof cannot achieve desired properties; in particular, graphene is the reinforcing phase material which has received extremely high attention and researches. Due to the instability of two-dimensional crystals in terms of thermodynamic properties, whether the graphene exists in a free state or is deposited in a substrate, the graphene is not completely flat, with microscopic three-dimensional scale wrinkles on its surface, and such wrinkles will cause agglomeration of the graphene through Van der waals force, and the wettability between the graphene and the substrate (such as metal, alloy, resin) is poor, thereby it is more difficult for graphene to be uniformly dispersed in the substrate. The existing composite material manufacturing equipment cannot effectively solve the problems of agglomeration of reinforcing phase nanomaterials in the substrate.

SUMMARY OF THE INVENTION

In order to solve various problems of the prior art, the present application provides a composite material manufacturing equipment including a raw material cylinder, an oil hydraulic piston and a rotating mold. The raw material cylinder has a raw material chamber capable of being filled with a substrate and a reinforcing phase material, and a material inlet and a material outlet located at opposite sides of the raw material chamber, wherein the substrate is in a form of column, and the reinforcing phase material is in a form of powder. The oil hydraulic piston is arranged at a side of the material inlet of the raw material cylinder, for pushing the substrate and the reinforcing phase material to move towards the material outlet. The rotating mold is arranged at a side of the material outlet of the raw material cylinder, and includes an outer mold and a rotating flow channel inside the outer mold, wherein the outer mold can rub the substrate to plasticize the substrate, and the rotating flow channel can disperse and mix the plasticized substrate and the reinforcing phase material to form a composite material.

In an embodiment, the substrate is metal, alloy or polymer, the reinforcing phase material is graphene.

In an embodiment, wherein the outer mold includes a rubbing part, a heat insulating part and a forming part, the heat insulating part is sandwiched between the rubbing part and the forming part, the rotating flow channel passes through the rubbing part, the heat insulating part and the forming part, an inlet of the rotating flow channel is located at the rubbing part, an outlet of the rotating flow channel is located at the forming part, the rubbing part can rotationally rub the substrate, the heat insulating part can insulate heat generated by the rubbing part rotationally rubbing the substrate, and the forming part can cool the composite material.

In an embodiment, a plurality of spiral guide grooves is formed on a surface of the rubbing part, and the plurality of spiral guide grooves communicates with the rotating flow channel.

In an embodiment, the rotating mold further includes an inner mold disposed inside the outer mold, and the rotating flow channel is located between the outer mold and the inner mold.

In an embodiment, the outer mold has inner lugs formed on an inner surface thereof, the inner mold has outer lugs formed on an outer surface thereof, the inner lugs and the outer lugs are in a stagger arrangement, when the outer mold rotates relative to the inner mold, the inner lugs and the outer lugs generate the shear force to disperse and mix the substrate and the reinforcing phase material.

In an embodiment, the outer mold and the inner mold are cone-shaped, and the rotating flow channel extends at an oblique angle of 15-30° with respect to the horizontal direction.

In an embodiment, the inner mold has a conical surface in contact with the substrate, and a plurality of spiral guide grooves is formed on the conical surface.

In the composite material manufacturing equipment of the present application, the raw material chamber of the raw material cylinder can be filled with the substrate in the form of column and the reinforcing phase material in the form of powder, the oil hydraulic piston can push the substrate and the reinforcing phase material to move towards the material outlet, the outer mold of the rotating mold can rotationally rub the substrate to plasticize the substrate, the rotating flow channel can disperse and mix the plasticized substrate and the reinforcing phase material to form the composite material; the manufacturing process does not require heating, the reinforcing phase material is uniformly dispersed in the substrate, and there is no phase separation in the obtained composite material, which can be available for subsequently processing applications in various industries.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Hereinafter, the embodiments of the present invention will be described in more detail with reference to the drawings and reference numerals, in order that those skilled in the art can implement the present invention accordingly after studying the present description. The terminology used herein is used to describe particular embodiments only, and is not intended to limit the present invention. Unless it is clearly indicated in the context otherwise, the terms used herein include both singular and plural forms, and the term “and/or” includes any and all combinations of one or more of the associated listed items.

A solid material under the rubbing of external force will generated particles of a size less than 20 μm on its surface, a temperature of the solid material rises to a critical temperature Tc for plasticization (which is between the melting point Tm of the solid material and 70% of the melting point Tm) by continuously applying force to rub it, and the plasticized material can generate thixotropy by repeatedly cooling and rubbing to heat it and simultaneously applying a varying shear force thereto. Thixotropy refers to a phenomenon that a viscosity of an object becomes less (or greater) when the object receives the shear force, while the viscosity of the object becomes greater (or less) when the shear force is stopped; that is, the structure of the object changes reversibly and the object has superplasticity (a particularly high elongation and not to be broken). The material with thixotropy generated has an appearance of paste-like slurry (the volume of solid phase accounts for up to 80%), and contains fine crystal particles which are not connected to each other in the interior. Continuous to stir the thixotropic slurry can prevent the fine crystal particles from contacting with each other to form large crystal particles; at this time, if other materials of appropriate size are mixed with the thixotropic slurry by a specific method, the effect of uniformly dispersing the materials can be achieved. Taking the metal and alloy materials as examples, under no inert gas protection, the composite material of graphene and lead, tin, zinc, aluminum or aluminum alloy can be manufactured at the plasticizing temperature lower than 700° C.; under the inert gas protection, the composite material of graphene and copper or copper alloy can be manufactured at the plasticizing temperature lower than 1100° C.

FIG.2Ais a schematic side cross-sectional view of a composite material manufacturing equipment of the first embodiment of the present application,FIG.2Bis a schematic view of a radial appearance of an outer mold shown inFIG.2A. As shown inFIGS.2A and2B, a composite material manufacturing equipment2includes a support frame20, an oil hydraulic piston21, a raw material cylinder22, a rotating mold23and a power unit24, the oil hydraulic piston21includes an oil hydraulic cylinder211and a piston212; the raw material cylinder22includes a raw material cylinder body221, a raw material chamber222, and a material inlet223and a material outlet224located at opposite sides of the raw material chamber222; the rotating mold23includes an outer mold231and a rotating flow channel232located inside the outer mold; the power unit24includes a motor gear box241and a ball bearing242. The raw material chamber222can be filled with a substrate B and a reinforcing phase material S, the oil hydraulic piston21is arranged at the side of the material inlet223of the raw material cylinder22, the rotating mold23is arranged at the side of the material outlet of the raw material cylinder22. The piston212can push the substrate B and the reinforcing phase material S to move towards the material outlet224, the power unit24can drive the rotating mold23, wherein the outer mold231rotationally rubs the substrate B then plasticizes the substrate B, and the rotating flow channel232disperses and mixes the plasticized substrate B and the reinforcing material S to form a composite material.

The substrate B is metal, alloy or polymer, wherein the metal can be selected from at least one of lead, tin, zinc, aluminum and copper; the alloys is, for example, but not limited to, aluminum alloys, copper alloys; the polymer is, for example, but not limited to, polyethylene (PE), polypropylene (PP), acrylic copolymers, polyethylene terephthalate (PET), polyimide (PI), acrylonitrile-butadiene-styrene copolymer (ABS), polyether ether ketone (PEEK), nylon, etc. The reinforcing phase material S is carbon nanotubes, graphene or nanoceramics.

In this embodiment, the outer mold231of the rotating mold23includes a rubbing part2311, a heat insulating part2312and a forming part2313, the heat insulating part2312is sandwiched between the rubbing part2311and the forming part2313, the rotating flow channel232passes through the rubbing part2311, the heat insulating part2312and the forming part2313, an inlet of the rotating flow channel232is located at the rubbing part2311, an outlet of the rotating flow channel232is located at the forming part2313, a plurality of spiral guide grooves2314is formed on a surface of the rubbing part2311, the plurality of the spiral guide grooves2314communicates with the rotating flow channel232.

A process of manufacturing the composite material by using the composite material manufacturing equipment2includes following steps. The columnar substrate B has a hole drilled along its axial direction according to a predetermined weight ratio of the reinforcing phase material S, and the hole is filled with the reinforcing phase material S. The substrate B and the reinforcing phase material S are placed into the raw material chamber222. The power unit24drives the rotating mold23counterclockwise rub the substrate B with high torque, to allow a temperature of the substrate B rise to the critical temperature Tc for plasticization, thereby forming a thixotropic plasticized substrate. The piston212of the oil hydraulic unit21pushes and squeezes the plasticized substrate and the reinforcing phase material S with a constant stroke, the plasticized substrate is mixed with the reinforcing phase material through the plurality of spiral guide grooves2314on the surface of the rubbing part2311and they enters the rotating flow channel232, thereby forming a slurry P of the plasticized substrate and the reinforcing material. The oil hydraulic piston21pushes and squeezes the slurry P to move upward against gravity, and an inner wall of the rotating flow channel232applies a shear force to the slurry P on the rotating direction at the same time, so that the reinforcing phase material S gradually form a spiral arrangement in the plasticized substrate during the slurry P moving upward by torsion. The heat insulating part2312can effectively prevent the high temperature generated by the rubbing part2311from being conducted to the forming part2313. The slurry P passing through the forming part2313is gradually cooled down, thereby forming the composite material. The oil hydraulic piston21pushes the composite material out of the rotating flow channel232, and thus a columnar composite material is obtained.

FIG.3Ais a schematic side cross-sectional view of a composite material manufacturing equipment of the second embodiment of the present application,FIG.3Bis a schematic side cross-sectional view of an oil hydraulic piston shown inFIG.3A,FIG.3Cis a schematic side cross-sectional view of a raw material cylinder shown inFIG.3A,FIG.3Dis a schematic side cross-sectional view of a rotating mold shown inFIG.3A,FIG.3Eis a schematic side cross-sectional view of a cooling mold shown inFIG.3A,FIG.3Fis a schematic side cross-sectional view of a forming mold shown inFIG.3A,FIG.3Gis a schematic side cross-sectional view of I-I′ section shown inFIG.3A, andFIG.3His a schematic view of radial and axial appearances of the first inner mold shown inFIG.3C.

As shown inFIGS.3A and3B, a composite material manufacturing equipment3includes a control unit30, an oil hydraulic piston31, a raw material cylinder32, a rotating mold33, a cooling mold34and a forming mold35, the control30is connected to the oil hydraulic piston31, the raw material cylinder32, the rotating mold33, the cooling mold34and the forming mold35; the oil hydraulic piston31, the raw material cylinder32, the rotating mold33, the cooling mold34and the forming mold35are arranged horizontally, and fixed on a movable carrying platform300. The oil hydraulic piston31is arranged at a side of a material inlet of the raw material cylinder32, the rotating mold33is arranged at a side of a material outlet of the raw material cylinder32. Parameters for operation of the equipment (for example, the pushing and squeezing pressure of the piston, the rotation speed of the rotating mold) can be input and adjusted in the control unit30. The oil hydraulic piston31includes an oil hydraulic cylinder311and a piston312, wherein the oil hydraulic cylinder311can drive the piston312push and squeeze the raw material in the raw material cylinder32to move towards the rotating mold33.

As shown inFIGS.3A and3C, the raw material cylinder32of the composite material manufacture equipment3includes a raw material cylinder body321and a raw material chamber322, the raw material cylinder body321and the piston312are in a form of cylinder, an inner diameter of the raw material chamber322corresponds to an outer diameter of the piston312. The raw material cylinder body321is made of materials with high melting point and high strength, such as metal alloys like tungsten, manganese, molybdenum, or ceramic alloys like tungsten carbide, and thus can withstand the pushing and squeezing of the piston312without deformation. Four inwardly retracted threaded holes3211are formed on a side of the raw material cylinder body321connected to the rotating mold33. The raw material chamber322can accommodate the substrate B in a form of column and the reinforcing phase material S in a form of powder.

As shown inFIGS.3A and3D, the rotating mold33of the composite material manufacture equipment3includes a first outer mold331, a first inner mold332, a speed change gear333, a coupling gear set334, and a variable frequency motor335, the first outer mold331is disposed on a rolling bearing330, and can be opened and closed by 180° for assembly and cleaning. The first inner mold332is disposed inside the first outer mold331. Two sides of the first inner mold332are respectively connected to the raw material cylinder32and the cooling mold34. The speed change gear333meshes with the ratchets (not shown) of the first outer mold331and the coupling gear set334, respectively. The speed change gear333, the coupling gear set334, and the variable frequency motor335are fixed on the carrying platform300by bolts, respectively. The variable frequency motor335is connected to the coupling gear set334, and the variable frequency motor335can drive the first outer mold331to rotate through the coupling gear set334and the speed change gear333.

The first outer mold331, which is in a cone shape, has a thickness gradually increasing from the side of the raw material cylinder32to the side of the cooling mold34(along the axial direction). A feed port with a greater opening size and a discharge port with a less opening size are formed at two sides of the first outer mold331on its radial direction, respectively. A side wall at the feed port of the first outer mold331is aligned with the raw material cylinder321. A circular groove is formed on the side wall at the discharge port of the first outer mold331, wherein a rotating shaft3311is provided in the circular groove. The first outer mold331has inner lugs3312formed on an inner surface thereof from the feed port to the middle section. The first outer mold231can be opened and closed by 180° along the axial direction for facilitating assembly and cleaning. The first inner mold332has a conical surface3321protruding beyond the feed port of the first outer mold331formed on the side facing the raw material cylinder32, a periphery of the conical surface3321is provided with four ribs3322, and each of the ribs3322is provided with a through hole thereon for bolts to pass through. A vertical surface of the first inner mold332facing the cooling mold34is aligned with the discharge port of the first outer mold331, wherein a groove3323is formed on the vertical surface. The first inner mold332has outer lugs3324formed on an outer surface thereof from the conical surface3321to the middle section. The four ribs3322of the first inner mold332are aligned with and inserted into the four threaded holes3211of the raw material cylinder body321, such that the first inner mold332and the raw material cylinder body321are fixed with bolts. The groove3323of the first inner mold332is coupled to the cooling mold34, such that the first inner mold332is fixed to the raw material cylinder32and the cooling mold34at two sides thereof, respectively; then the side wall at the feeding port of the first outer mold331is attached to the side wall of the raw material cylinder body321. When the first outer mold331is closed, the first outer mold331and the first inner mold332are separated by a distance not greater than 5 cm, and the inner lugs3312of the first outer mold331and the outer lugs3324of the first inner mold332are in a stagger arrangement. Due the first outer mold331and the first inner mold332are cone-shaped, a rotating flow channel336extending at an oblique angle of 15-30° with respect to the horizontal direction is formed between the first outer mold331and the first inner mold332. The first outer mold331and the first inner mold332are each made of materials with high melting point and high strength (such as metal alloys like tungsten, manganese, molybdenum, or ceramic alloys like tungsten carbide), and thus can withstand the high temperature and stress generated during rubbing the substrate without deformation.

As shown inFIGS.3A and3E, the cooling mold34of the composite material manufacturing equipment3includes a second outer mold341and a second inner mold342. The second outer mold341has a thickness gradually increases from the side connected to the rotating mold33to the side connected to the forming mold35(along an axial direction). A feed port with a greater opening size and a discharge port with a less opening size are formed on two sides of the second outer mold341on its radial direction, respectively. The opening size of the feed port of the second outer mold341is equal to that of the discharge port of the first outer mold331. A circular groove is formed on the side wall at the feed port of the second outer mold341, and the rotating shaft3311is accommodated in the circular groove. A bump3411is formed on the side wall at the discharge port of the second outer mold342, and the bump3411can be coupled to the forming mold35. A bump3421is formed on the side of the second inner mold342facing the rotating mold33, and the bump3421can be coupled to the groove3323of the first inner mold331. The second inner mold342is provided with four ribs3422at each of two opposite sides, and threaded holes3412corresponding to the ribs3422are formed on the second outer mold341, such that the second outer mold341and the second inner mold342are fixed with bolts. A cooling flow channel343extending at an oblique angle of 15-30° with respect to the horizontal direction is formed in the gap of about 3 cm between the inner surface of the second outer mold341and the outer surface of the second inner mold342. By aligning and attaching the feed port of the second outer mold341to the discharge port of the first outer mold331, the rotating flow channel336and the cooling flow channel343can be communicated with each other. The portion of each rib3422exposed to the cooling flow channel343is processed into a round shape, which can prevent the graphene-substrate slurry from accumulating and then blocking the passing of graphene-substrate slurry through the cooling flow channel343.

As shown inFIGS.3A and3F, the forming mold35of the composite material manufacturing equipment3includes a finished product cylinder351and a finished product chamber352inside the finished product cylinder351. The finished product cylinder351is made of materials with high melting point and high strength, and the finished product cylinder351can be opened and closed along the axial direction. A groove3511is formed on a side wall of the finished product cylinder351facing the cooling mold34, and the groove3511can be coupled to the bump3411of the second outer mold341. A size of an inner diameter of the finished product chamber352is equal to the opening size of the discharge port of the second outer mold341.

In this embodiment, the substrate B can be formed as a single column or a plurality of columns (circular column, corner column), the outer diameter and volume of the columnar substrate B are less than the inner diameter and volume of the raw material chamber322, the columnar substrate B is placed into the raw material chamber222, and then the raw material chamber322is filled up with the reinforcing phase material S (that is, the gap between the columnar substrate B and the raw material cylinder body321is filled with the reinforcing phase material S) to cover the columnar substrate B; alternatively, the substrate can be made into the columnar substrate with the diameter same as the inner diameter of the raw material chamber322, one or more filler hole(s) with a same diameter is(are) formed along the axial direction of the columnar substrate with a drilling tool, and then the reinforcing phase material are filled into the filler hole(s). By using the columnar substrate as the raw material, it is easy to control and adjust the relative weight ratio of the substrate B to the reinforcing phase material S in the composite material.

FIG.3Gis a schematic cross-sectional view of section I-I′ inFIG.3A. As shown inFIGS.3A,3D and3G, a recess that fits the shape of the conical surface3321and the ribs3322of the first inner mold332is formed on the side of the substrate B facing the rotating mold33. The ribs3322of the first inner mold332are fixed into the inwardly retracted threaded holes3211of the raw material cylinder body321; meanwhile, the conical surface3321of the first inner mold332is embedded into the recess of the substrate B. A portion of the periphery of the recess of the substrate B exposed to the first inner mold332is aligned with the vertical surface of the side wall of the raw material cylinder body321. The thickness of the side wall at the feed port of the first outer mold331is greater than the thickness of the side wall of the raw material cylinder body321, so that a rubbing part3313(the location illustrated by the dotted line shown inFIG.3G) is formed on the side wall at the feed port of the first outer mold331that extends beyond the side wall of the raw material cylinder body321, the rubbing part3313can be attached to the exposed portion of the substrate B and the reinforcing phase material S. When the variable frequency motor335is started to drive the first outer mold331to rotate, the plasticized substrate is formed due to the high heat generated by the rubbing part3313of the side wall of the first outer mold331rotationally rubbing the exposed portion of the substrate B, and then the piston312pushes and squeezes the plasticized substrate and the reinforcing phase material S into the rotating flow channel336.

FIG.3His a schematic view of the radial and axial appearances of the first inner mold shown inFIG.3D. As shown inFIGS.3A,3D and3H, the conical surface3321of the first inner mold332is in close contact with the surface of the recess of the substrate B, and a plurality of spiral guide grooves3325is formed on the conical surface3321, wherein the depth of the spiral guide grooves3325is not greater than 5 mm. The first outer mold331rotationally rubs the substrate B around the first inner mold332to form the plasticized substrate, the piston312pushes and squeezes the plasticized substrate and the reinforcing phase material S into the rotating flow channel336along the spiral guide grooves3325. In the rotating flow channel336, the heights of the inner lugs3312of the first outer mold331and the outer lugs3324of the first inner mold332are about 1 to 3 cm, the staggered inner lugs3312and outer lugs3324rotate relative to each other, thereby generating the shear force that continuously rubs and stirs the plasticized substrate and the reinforcing phase material, to allow the crystallization and eutectic crystal of the plasticized substrate be gradually fined, thereby producing a thixotropic slurry. The fined crystal grains of the substrate in the thixotropic slurry are not connected to each other, such that the reinforcing phase material can be dispersed among the crystal grains of the substrate without agglomeration. Due to the pushing and squeezing pressure of the piston312and the shear force generated by the rotating flow channel336, the reinforcing phase material and the crystal grains of the plasticized substrate pass through the rotating flow channel336in a spiral arrangement. The thixotropic slurry passing through the cooling flow channel343is gradually cooled to be a semi-solid composite material, and the reinforcing phase material in a spiral arrangement and connected with each other are gradually fixed on the surface of the crystal grains of the substrate. Due to the pushing and squeezing pressure of the piston312, the semi-solid composite material is further extruded into the forming mold35then solidified, and a columnar composite material is formed. There is no occurring of phase separation between the reinforcing phase material and the substrate, such that the composite material possesses excellent properties of the reinforcing phase material.

As mentioned above, the graphene is the reinforcing phase material which is the most difficult to be uniformly dispersed in the substrate, the composite material manufacturing equipment of the present application will be specifically illustrated with following embodiments of the graphene, so that those skilled in the art can more clearly understand the technology and effects of the present application.

Embodiment 1: A Graphene-Metal Copper Composite Material

The raw materials include: 0.5 wt % of graphene sheets (multilayer graphene powder P-ML20 produced by Enerage Inc. with a carbon content >99%, a specific surface area of 45 m2/g, an average thickness of about 3 nm, an average diameter of about 8 mm); and 99.5 wt % of electrolytic copper (with copper purity >99.5%, which is formed as metal copper column with a diameter of 9 cm). By using the aforesaid composite material manufacturing equipment2, the copper rod is rubbed at 200 rpm with a rotating mold until it reaches 750° C., and pushed to advance 10 mm per minute by the oil hydraulic piston with a force of 50 kilonewtons (kN), and thus a graphene-metal copper composite material is obtained.

FIG.4Ais an optical microscope image of a cross-section of the graphene-metal copper composite material of this Embodiment;FIG.4Bis an electron microscope image of a cross-section of the graphene-metal copper composite material of this embodiment. As shown inFIG.4A, the composite material of graphene and metal copper includes a metal copper column and graphene sheets G, it can be clearly observed that the graphene sheets form a plurality of circular patterns of different radii on a radial section of the metal copper column; moreover, as shown inFIG.4B, it can be observed that there is no phase separation between the graphene sheets G and the metal copper. It is noted that a plurality of graphene sheets interconnections in a spiral arrangement along the axial direction of the metal copper column can be observed (not shown). The uniformly distributed graphene sheets interconnection can provides the inherently excellent properties of graphene, such that the graphene-metal copper composite material has the properties of electrical conductivity, thermal conductivity, and mechanical strength higher than those of metal copper, thereby the composite material can be subsequently processed into required products (such as cooling fin, wires, etc.) by processes such as forging, rolling. The measured results of hardness and electrical conductivity of the metal copper and the graphene-metal copper composite material of this embodiment are shown in Table 1 below.

Embodiment 2: A Graphene-Aluminum Alloy Composite Material

The raw materials include: 0.5 wt % of graphene sheets (multilayer graphene powder P-ML20 produced by Enerage Inc. with a carbon content >99%, a specific surface area of 45 m2/g, an average thickness of about 3 nm, an average diameter of about 8 mm); and 99.5 wt % of aluminum alloy (ASTM 6061, which is formed as aluminum alloy rod with a diameter of 9 cm). By using the aforesaid composite material manufacturing equipment3, the aluminum alloy rod is rubbed at 250 rpm with the rotating mold until it reaches 550° C., and pushed to advance 15 mm per minute by the oil hydraulic piston with a force of 45 kilonewtons (kN), and thus a graphene-aluminum alloy composite material is obtained. The uniformly distributed graphene sheets can provides the inherently excellent properties of graphene, such that the graphene-aluminum alloy composite material has the properties of electrical conductivity, thermal conductivity, and mechanical strength higher than those of aluminum alloy, thereby the composite material can be subsequently processed into required products (such as electronic devices and aircraft casings, etc.). The measured results of hardness and thermal conductivity of the aluminum alloy raw material and the graphene-aluminum alloy composite material of this embodiment are shown in Table 2 below.

In summary, in the composite material manufacturing equipment of the present application, the raw material chamber of the raw material cylinder can be filled with the substrate in the form of column and the reinforcing phase material in the form of powder, the oil hydraulic piston can push the substrate and the reinforcing phase material to move towards the material outlet, the outer mold of the rotating mold can rotationally rub the substrate to plasticize the substrate, the rotating flow channel can disperse and mix the plasticized substrate and the reinforcing phase material to form the composite material; the manufacturing process thereof does not require heating, the reinforcing phase material is uniformly dispersed in the substrate, and there is no phase separation in the obtained composite material, which can be available for subsequently processing applications in various industries.

The above-mentioned embodiments only exemplify the principles and effects of the present invention, but are not intended to limit the present invention. Any person skilled in the art can modify and change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications, combinations or changes accomplished without departing from the spirit and technical principles disclosed in the present invention by those skilled in the art should falls within the scope of the claims of the present invention.