CN107299298B - A kind of preparation method of short carbon fiber/carbon/carbon-copper composite material - Google Patents
A kind of preparation method of short carbon fiber/carbon/carbon-copper composite material Download PDFInfo
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- CN107299298B CN107299298B CN201710477019.9A CN201710477019A CN107299298B CN 107299298 B CN107299298 B CN 107299298B CN 201710477019 A CN201710477019 A CN 201710477019A CN 107299298 B CN107299298 B CN 107299298B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C47/00—Making alloys containing metallic or non-metallic fibres or filaments
- C22C47/14—Making alloys containing metallic or non-metallic fibres or filaments by powder metallurgy, i.e. by processing mixtures of metal powder and fibres or filaments
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/02—Alloys containing metallic or non-metallic fibres or filaments characterised by the matrix material
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C49/00—Alloys containing metallic or non-metallic fibres or filaments
- C22C49/14—Alloys containing metallic or non-metallic fibres or filaments characterised by the fibres or filaments
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Abstract
The present invention relates to a kind of preparation method of fiber/carbon/carbon-copper composite material, especially a kind of preparation method of 1mm short carbon fiber reinforceds Cu matrix composites.Preparation method is：After mixing by uniformly mixed copper source, titanium source and short carbon fiber, using discharge plasma sintering, short carbon fiber/carbon/carbon-copper composite material is obtained；Sintering parameter is 790 DEG C~880 DEG C, 10~30min of soaking time of temperature, and sintering pressure is 5~25MPa；Copper is zeroth order in copper source；Titanium is zeroth order in the titanium source.Manufacturing cost of the present invention is low, low energy consumption, products obtained therefrom function admirable.
Description
Technical field
The present invention relates to a kind of preparation method of fiber/carbon/carbon-copper composite material, especially a kind of 1mm short carbon fiber reinforceds Cu
The preparation method of matrix composite.
Background technology
Copper has excellent conduction, thermal conductivity, but the intensity of fine copper is relatively low.And carbon fiber has high specific modulus, ratio
Intensity and good self lubricity.Properties of Cu/Short Carbon Fibers Composites shows good conduction, thermal conductivity, excellent
The series of advantages such as mechanical property, wearability, heat-resisting quantity, arc ablation resistance and good self lubricity are now used as one
Kind metal-base composites has been widely used in the fields such as machine-building, aerospace.
It, can be different to obtain by controlling carbon fiber type, content and distribution since this kind of material designability is good
Performance indicator.Not only electric conductivity and thermal conductivity are close with fine copper for C/Cu composite materials, and with good anti electric arc corrosion and
The advantages that antiwear property, has been widely used in materials of electronic components, sliding material, contact material, cooling integrated plate
And the fields such as wear resistant appliance, it is a kind of new material with wide application prospect.Compared with long fibre, short carbon fiber/copper is multiple
Condensation material has molding simple in manufacture, and Element Design is flexible, the advantages that being suitable for industrialized production.
At present most people mixed using mechanical ball mill so that fiber to receive damage larger, and held with the mode of electric stirring
Easy agglomerate is not easy to disperse；In addition electroless copper or titanium process are carried out to fiber, generates more discarded chemical agent, pollute environment；
Traditional hot pressed sintering is higher to temperature requirement, and long time period.
For directly adding the interfaces a small amount of Ti powder wetting C/Cu, then prepared using plasma discharging low temperature Fast Sintering short
Carbon fiber/Cu-base composites, this mode have not been reported in available data.
Invention content
It is an object of the invention to overcome the deficiency of the prior art, with safe and efficient mode can homogeneous mixture of material,
And Fast Sintering, low energy consumption, the preparation method of short carbon fiber/carbon/carbon-copper composite material of products obtained therefrom function admirable.
A kind of preparation method of short carbon fiber/carbon/carbon-copper composite material of the present invention, scheme are：By uniformly mixed copper source, titanium
Source and short carbon fiber after mixing, using discharge plasma sintering, obtain short carbon fiber/carbon/carbon-copper composite material；Sintering parameter is
790~880 DEG C of temperature, preferably 830~860 DEG C, further preferably 845~860 DEG C, still more preferably be 850 DEG C,
10~30min of soaking time, sintering pressure are 5~25MPa；Copper is zeroth order in copper source；Titanium is zeroth order in the titanium source.
A kind of preparation method of short carbon fiber/carbon/carbon-copper composite material of the present invention, copper source are copper powder and/or copper-titanium alloy
Powder；The titanium source is titanium valve and/or copper-titanium alloy powder.
A kind of preparation method of short carbon fiber/carbon/carbon-copper composite material of the present invention, the length of the short carbon fiber are less than or equal to
1mm。
A kind of preparation method of short carbon fiber/carbon/carbon-copper composite material of the present invention, a diameter of 6-10 μm of the short carbon fiber, excellent
It is selected as 6.5~7.5 μm, further preferably 7 μm.
Preferably, a kind of preparation method of short carbon fiber/carbon/carbon-copper composite material of the present invention, includes the following steps：
Step 1
After long carbon fiber is cut into short carbon fiber, it is put into high-temperature vacuum furnace, at 1000~1200 DEG C, keeps the temperature 0~2h；With stove
It is cooled to room temperature, obtains spare short carbon fiber；
Step 2
The Cu/Ti powder made from wet ball grinding is dried under vacuum, obtains spare Cu/Ti powder；It is described standby
With in Cu/Ti powder, the mass ratio of Cu and Ti are 90~80:10~20；By design component by spare Cu/Ti powder with it is spare
Short carbon fiber is mixed in V-type blender；Obtain the composite granule that short carbon fiber and metal powder are uniformly mixed；It is described compound
Cu, Ti in powder, short carbon fiber mass ratio be Cu：Ti：Short carbon fiber=43.2~49.5:10.8~9:1.5~6；
Step 3
Composite granule obtained by step 2 is packed into mold, short carbon fiber/composite copper material is obtained using discharge plasma sintering
Material；Sintering parameter is 790 DEG C~880 DEG C of temperature, is preferably 830~860 DEG C, further preferably 845~860 DEG C, more into one
Preferably 850 DEG C, 10~30min of soaking time of step, sintering pressure is 5~25MPa.
Preferably, a kind of preparation method of short carbon fiber/carbon/carbon-copper composite material of the present invention, short carbon described in step 1
A diameter of 7 μm, length 1mm of fiber.The density of long carbon fiber used is 1.76g/cm3。
Preferably, a kind of preparation method of short carbon fiber/carbon/carbon-copper composite material of the present invention, in step 1, vacuum is high
Warm stove sintering parameter is 1200 DEG C of temperature, and vacuum environment keeps the temperature 2h, and air pressure is less than or equal to 100Pa in stove.
Preferably, a kind of preparation method of short carbon fiber/carbon/carbon-copper composite material of the present invention, in step 2,
The granularity of copper powder is less than or equal to 50 microns, and apparent density density is 2.8~3g/cm3, the granularity of titanium valve is less than or equal to
74 microns, apparent density is 1.2~1.6g/cm3；The Ball-milling Time is 4~8h, ball：Material：The mass ratio of alcohol is 4~6:
0.5~1:0.3~0.5, the rotating speed of wet ball grinding is 0~300 turn/min；
Preferably, a kind of preparation method of short carbon fiber/carbon/carbon-copper composite material of the present invention, in step 2, by design
Component spare Cu/Ti powder is mixed with spare short carbon fiber in V-type blender；Obtain short carbon fiber and metal powder
Uniformly mixed composite granule；When mixing, control V-type batch mixing speed be 0~90r/min, preferably 90r/min, the time be 0~
10h, preferably 5h.
Preferably, a kind of preparation method of short carbon fiber/carbon/carbon-copper composite material of the present invention, in step 3, electric discharge etc.
Ion sintering process is：It is first vacuumized with lobe pump, vacuum degree 0.05mbar, then with 30MPa pressure to being equipped with composite powder
The mold of body carries out precompressed 20min, then with the speed of 50~100 DEG C/min be warming up to 790~850 DEG C, pressure for 5~25MPa,
Soaking time is 10~30min；After sintering, it is cooled to room temperature.
A kind of preparation method of short carbon fiber/carbon/carbon-copper composite material of the present invention, prepared short carbon fiber/carbon/carbon-copper composite material
Consistency is more than or equal to 84.14%, and resistivity is less than or equal to 0.66 μ Ω m, and bending strength is greater than or equal to 241.84MPa.
As further preferred embodiment, prepared by a kind of preparation method of short carbon fiber/carbon/carbon-copper composite material of the present invention
Method includes the following steps
Step 1
After long carbon fiber is cut into short carbon fiber, it is put into high-temperature vacuum furnace, at 1200 DEG C, 2h is kept the temperature, cools to room with the furnace
Temperature obtains spare short carbon fiber；
Step 2
It is less than or equal to granularity, is preferably equal to the titanium valve of 50 Micron Copper Powders, granularity less than or equal to preferably equal to 74 microns
For raw material；By ball：Material：The mass ratio of alcohol is 2:1:0.3；Abrading-ball, raw material and alcohol are added in ball mill and carry out ball milling；
The rotating speed of the ball milling is 300 turns/min, Ball-milling Time 8h；Obtain Cu/Ti powder；By gained Cu/Ti powder in vacuum item
It is dried under part, obtains spare Cu/Ti powder；When drying under vacuum, the air pressure in control device is less than or equal to
0.09MPa, controlled at 50 DEG C；The mass ratio of the copper powder and titanium valve is 5:1；
Spare Cu/Ti powder is mixed with spare short carbon fiber in V-type blender by the component of design；Obtain short carbon
The composite granule that fiber and metal powder are uniformly mixed；The mass percentage of Ti is 9%, short carbon fiber in the composite granule
Mass percentage be 3%；
Step 3
Composite granule obtained by step 2 is packed into mold, short carbon fiber/composite copper material is obtained using discharge plasma sintering
Material；Sintering parameter is that temperature is 850 DEG C, 10~30min of soaking time, and sintering pressure is 5~25MPa；Short carbon fiber/the copper
The consistency of composite material be more than or equal to 99.32%, resistivity be 0.3~0.66 μ Ω m, bending strength be 550~
806MPa。
Advantage and good effect
The present invention due to using above-mentioned process, thus, have the following advantages that and good effect：
1, preferably, the present invention uses a diameter of 7 μm of short carbon fiber, length 1mm, can preferably rise
To the toughening effect to metallic matrix.Relative to carbon fiber different in size, it is easier to occur to tangle and reunite, can in batch mixing and
When sintering, bring a large amount of cavity and gap, lead to insufficient contact with metal powder, further influence densification process with
And other performances.This is also the one of the major reasons of the invention for wanting first fixed limit to determine short carbon fiber size.
2, the present invention prepares Cu/Ti powder using ball milling mixing metal powder material, then V type batch mixers is being used, specific
Short carbon fiber and metal powder are mixed under rotating speed, can be preferably uniformly mixed two kinds of larger materials of density difference, relatively
In ball milling mixing, agglomeration will not occur, and almost seldom to the damage of fiber.
3, directly improve or soak the interfaces C/Cu using add Ti powder by the way of, this can to avoid polluting environment, and
It is easy to operate.When the present invention is also avoided that using physics plating Ti simultaneously, short carbon fiber is difficult to be electroplated uniform and complicated for operation, length
Fiber plating is cut short again, and fiber both ends cannot cover complete deficiency again.
4, relative to conventional thermocompression sintering processing, discharge plasma sintering can be by sintering temperature from 1100 DEG C or more
790 DEG C~880 DEG C are reduced to, sintering time is reduced from 12h or more to less than 1h, is greatly reduced energy waste, is saved
Time cost.Meanwhile when using further preferred embodiments of the present invention, products obtained therefrom achieves unexpected effect.
When in particular by preferred plan, the performance of products obtained therefrom is well beyond estimated.The densification of finished product obtained by its preferred plan
Degree reaches 99.37%, conductivity and reaches 806MPa for 0.32 μ Ω m, bending strength.
In conclusion the present invention makes fiber be evenly distributed on by adding appropriate Ti powder using suitable method for mixing
It, can be at 890 DEG C hereinafter, being quickly prepared with satisfactory electrical conductivity and power by discharge plasma sintering in metal powder
Learn short carbon fiber/carbon/carbon-copper composite material of performance.
Description of the drawings
Attached drawing 1 is the preferred preparation technology flow chart of short carbon fiber/carbon/carbon-copper composite material of the present invention.
Specific implementation mode
Embodiment 1：
(1) by a diameter of 7 μm, the short carbon fiber that length is 1mm, high-temperature vacuum furnace, 1200 DEG C of temperature, vacuum environment are put into
Keep the temperature 2h.
(2) it with wet ball grinding Cu/Ti powder, is consuming time as 8h, it is 2 that ball cooking wine essence, which compares,:1:0.3；After vacuum drying,
V-type blender is used together with 1mm short carbon fibers to be mixed, V-type batch mixing speed 90r/min, stirs 5h；Obtain short carbon fiber
The composite granule being uniformly mixed with metal powder, mass fraction containing Ti are 9%, and mass fraction containing short carbon fiber is 3%, surplus
For copper.
(3) during discharge plasma sintering, first vacuumized with lobe pump, vacuum degree 0.05mbar, then with
30MPa pressure carries out precompressed 20min, then is warming up to 790 DEG C, pressure 5MPa with the speed of 100 DEG C/min, and soaking time is
10min；After sintering, cooling circulating water is cooled to room temperature.Short carbon fiber/carbon/carbon-copper composite material is prepared.
The present embodiment usually soaks the interfaces C/Cu by directly adding Ti members, using the uniform batch mixing of V-type blender, by putting
Electric plasma agglomeration realizes Fast Sintering, short carbon fiber/carbon/carbon-copper composite material with superperformance is prepared.Its consistency
It is 84.14%, resistivity is 0.66 μ Ω m, bending strength 241.84MPa.
Embodiment 2：
(1) by a diameter of 7 μm, the short carbon fiber that length is 1mm, high-temperature vacuum furnace, 1200 DEG C of temperature, vacuum environment are put into
Keep the temperature 2h.
(2) it with wet ball grinding Cu/Ti powder, is consuming time as 8h, it is 2 that ball cooking wine essence, which compares,:1:0.3；After vacuum drying,
V-type blender is used together with 1mm short carbon fibers to be mixed, V-type batch mixing speed 90r/min, stirs 5h；Obtain short carbon fiber
The composite granule being uniformly mixed with metal powder, mass fraction containing Ti are 9%, and mass fraction containing short carbon fiber is 3%, surplus
For copper.
(3) during discharge plasma sintering, first vacuumized with lobe pump, vacuum degree 0.05mbar, then with
30MPa pressure carries out precompressed 20min, then is warming up to 820 DEG C, pressure 5MPa with the speed of 100 DEG C/min, and soaking time is
10min；After sintering, cooling circulating water is cooled to room temperature.Short carbon fiber/carbon/carbon-copper composite material is prepared.
The present embodiment usually soaks the interfaces C/Cu by directly adding Ti members, using the uniform batch mixing of V-type blender, by putting
Electric plasma agglomeration realizes Fast Sintering, short carbon fiber/carbon/carbon-copper composite material with superperformance is prepared.Its consistency
It is 89.59%, resistivity is 0.51 μ Ω m, bending strength 321.52MPa.
Embodiment 3：
(1) by a diameter of 7 μm, the short carbon fiber that length is 1mm, high-temperature vacuum furnace, 1200 DEG C of temperature, vacuum environment are put into
Keep the temperature 2h.
(2) it with wet ball grinding Cu/Ti powder, is consuming time as 8h, it is 2 that ball cooking wine essence, which compares,:1:0.3；After vacuum drying,
V-type blender is used together with 1mm short carbon fibers to be mixed, V-type batch mixing speed 90r/min, stirs 5h；Obtain short carbon fiber
The composite granule being uniformly mixed with metal powder, mass fraction containing Ti are 9%, and mass fraction containing short carbon fiber is 3%, surplus
For copper.
(3) during discharge plasma sintering, first vacuumized with lobe pump, vacuum degree 0.05mbar, then with
30MPa pressure carries out precompressed 20min, then is warming up to 850 DEG C, pressure 5MPa with the speed of 100 DEG C/min, and soaking time is
10min；After sintering, cooling circulating water is cooled to room temperature.Short carbon fiber/carbon/carbon-copper composite material is prepared.
The present embodiment usually soaks the interfaces C/Cu by directly adding Ti members, using the uniform batch mixing of V-type blender, by putting
Electric plasma agglomeration realizes Fast Sintering, short carbon fiber/carbon/carbon-copper composite material with superperformance is prepared.Its consistency
It is 99.37%, resistivity is 0.32 μ Ω m, bending strength 806MPa.
Embodiment 4：
(1) by a diameter of 7 μm, the short carbon fiber that length is 1mm, high-temperature vacuum furnace, 1200 DEG C of temperature, vacuum environment are put into
Keep the temperature 2h.
(2) it with wet ball grinding Cu/Ti powder, is consuming time as 8h, it is 2 that ball cooking wine essence, which compares,:1:0.3；After vacuum drying,
V-type blender is used together with 1mm short carbon fibers to be mixed, V-type batch mixing speed 90r/min, stirs 5h；Obtain short carbon fiber
The composite granule being uniformly mixed with metal powder, mass fraction containing Ti are 9%, and mass fraction containing short carbon fiber is 3%, surplus
For copper.
(3) during discharge plasma sintering, first vacuumized with lobe pump, vacuum degree 0.05mbar, then with
30MPa pressure carries out precompressed 20min, then is warming up to 880 DEG C, pressure 5MPa with the speed of 100 DEG C/min, and soaking time is
10min；After sintering, cooling circulating water is cooled to room temperature.Short carbon fiber/carbon/carbon-copper composite material is prepared.
The present embodiment usually soaks the interfaces C/Cu by directly adding Ti members, using the uniform batch mixing of V-type blender, by putting
Electric plasma agglomeration realizes Fast Sintering, short carbon fiber/carbon/carbon-copper composite material with superperformance is prepared.Its consistency
It is 86.41%, resistivity is 0.44 μ Ω m, bending strength 392.74MPa.
Embodiment 5：
(1) by a diameter of 7 μm, the short carbon fiber that length is 1mm, high-temperature vacuum furnace, 1200 DEG C of temperature, vacuum environment are put into
Keep the temperature 2h.
(2) it with wet ball grinding Cu/Ti powder, is consuming time as 8h, it is 2 that ball cooking wine essence, which compares,:1:0.3；After vacuum drying,
V-type blender is used together with 1mm short carbon fibers to be mixed, V-type batch mixing speed 90r/min, stirs 5h；Obtain short carbon fiber
The composite granule being uniformly mixed with metal powder, mass fraction containing Ti are 9%, and mass fraction containing short carbon fiber is 3%, surplus
For copper.
(3) during discharge plasma sintering, first vacuumized with lobe pump, vacuum degree 0.05mbar, then with
30MPa pressure carries out precompressed 20min, then is warming up to 850 DEG C, pressure 25MPa with the speed of 100 DEG C/min, and soaking time is
10min；After sintering, cooling circulating water is cooled to room temperature.Short carbon fiber/carbon/carbon-copper composite material is prepared.
The present embodiment usually soaks the interfaces C/Cu by directly adding Ti members, using the uniform batch mixing of V-type blender, by putting
Electric plasma agglomeration realizes Fast Sintering, short carbon fiber/carbon/carbon-copper composite material with superperformance is prepared.Its consistency
It is 99.75%, resistivity is 0.32 μ Ω m, bending strength 651.18MPa.
Embodiment 6：
(1) by a diameter of 7 μm, the short carbon fiber that length is 1mm, high-temperature vacuum furnace, 1200 DEG C of temperature, vacuum environment are put into
Keep the temperature 2h.
(2) it with wet ball grinding Cu/Ti powder, is consuming time as 8h, it is 2 that ball cooking wine essence, which compares,:1:0.3；After vacuum drying,
V-type blender is used together with 1mm short carbon fibers to be mixed, V-type batch mixing speed 50r/min, stirs 5h；Obtain short carbon fiber
The composite granule being uniformly mixed with metal powder, mass fraction containing Ti are 9%, and mass fraction containing short carbon fiber is 3%, surplus
For copper.
(3) during discharge plasma sintering, first vacuumized with lobe pump, vacuum degree 0.05mbar, then with
30MPa pressure carries out precompressed 20min, then is warming up to 850 DEG C, pressure 5MPa with the speed of 100 DEG C/min, and soaking time is
15min；After sintering, cooling circulating water is cooled to room temperature.Short carbon fiber/carbon/carbon-copper composite material is prepared.
The present embodiment usually soaks the interfaces C/Cu by directly adding Ti members, using the uniform batch mixing of V-type blender, by putting
Electric plasma agglomeration realizes Fast Sintering, short carbon fiber/carbon/carbon-copper composite material with superperformance is prepared.Its consistency
It is 99.32%, resistivity is 0.24 μ Ω m, bending strength 550.37MPa.
Comparative example 1
(1) by a diameter of 7 μm, the short carbon fiber that length is 5mm, high-temperature vacuum furnace, 1200 DEG C of temperature, vacuum environment are put into
Keep the temperature 2h.
(2) it with wet ball grinding Cu/Ti powder, is consuming time as 8h, it is 2 that ball cooking wine essence, which compares,:1:0.3；After vacuum drying,
V-type blender is used together with 5mm short carbon fibers to be mixed, V-type batch mixing speed 90r/min, stirs 5h；Obtain short carbon fiber
The composite granule being uniformly mixed with metal powder, mass fraction containing Ti are 9%, and mass fraction containing short carbon fiber is 3%, surplus
For copper.
(3) during discharge plasma sintering, first vacuumized with lobe pump, vacuum degree 0.05mbar, then with
30MPa pressure carries out precompressed 20min, then is warming up to 850 DEG C, pressure 5MPa with the speed of 100 DEG C/min, and soaking time is
10min；After sintering, cooling circulating water is cooled to room temperature.Short carbon fiber/carbon/carbon-copper composite material is prepared.
The present embodiment usually soaks the interfaces C/Cu by directly adding Ti members, using the uniform batch mixing of V-type blender, by putting
Electric plasma agglomeration realizes Fast Sintering, short carbon fiber/carbon/carbon-copper composite material with superperformance is prepared.Its consistency
It is 80.51%, resistivity is 0.58 μ Ω m, bending strength 274MPa.
Comparative example 2
(1) by a diameter of 7 μm, the short carbon fiber that length is 1mm, high-temperature vacuum furnace, 1200 DEG C of temperature, vacuum environment are put into
Keep the temperature 2h.
(2) it with wet ball grinding Cu/Ti powder, is consuming time as 8h, it is 2 that ball cooking wine essence, which compares,:1:0.3；After vacuum drying,
V-type blender is used together with 1mm short carbon fibers to be mixed, V-type batch mixing speed 90r/min, stirs 5h；Obtain short carbon fiber
The composite granule being uniformly mixed with metal powder, mass fraction containing Ti are 9%, and mass fraction containing short carbon fiber is 10%, remaining
Amount is copper.
(3) during discharge plasma sintering, first vacuumized with lobe pump, vacuum degree 0.05mbar, then with
30MPa pressure carries out precompressed 20min, then is warming up to 850 DEG C, pressure 5MPa with the speed of 100 DEG C/min, and soaking time is
10min；After sintering, cooling circulating water is cooled to room temperature.Short carbon fiber/carbon/carbon-copper composite material is prepared.
The present embodiment usually soaks the interfaces C/Cu by directly adding Ti members, using the uniform batch mixing of V-type blender, by putting
Electric plasma agglomeration realizes Fast Sintering, short carbon fiber/carbon/carbon-copper composite material with superperformance is prepared.Its consistency
It is 78.44%, resistivity is 0.92 μ Ω m, bending strength 132MPa.
Claims (6)
1. a kind of preparation method of short carbon fiber/carbon/carbon-copper composite material, it is characterised in that：Include the following steps：
Step 1
After long carbon fiber is cut into short carbon fiber, it is put into high-temperature vacuum furnace, at 1000~1200 DEG C, keeps the temperature 0.5~2h；With furnace cooling
But to room temperature, spare short carbon fiber is obtained；The length of the short carbon fiber is less than or equal to 1mm；A diameter of the 6 of the short carbon fiber
~10 μm；
Step 2
The Cu/Ti powder made from wet ball grinding is dried under vacuum, obtains spare Cu/Ti powder；The spare Cu/
In Ti powder, the mass ratio of Cu and Ti are 90~80:10~20；By the component of design by spare Cu/Ti powder and spare short carbon
Fiber is mixed in V-type blender；Obtain the composite granule that short carbon fiber and metal powder are uniformly mixed；The composite granule
In, Cu, Ti, three kinds of raw materials of short carbon fiber mass ratio be Cu：Ti：Short carbon fiber=43.2~49.5:10.8~9:1.5~
6；
Step 3
Composite granule obtained by step 2 is packed into mold, short carbon fiber/carbon/carbon-copper composite material is obtained using discharge plasma sintering；
Sintering parameter is 790 DEG C~880 DEG C, 10~30min of soaking time of temperature, and sintering pressure is 5~25MPa.
2. a kind of preparation method of short carbon fiber/carbon/carbon-copper composite material according to claim 1, it is characterised in that：Step 1
In, high-temperature vacuum furnace sintering parameter is 1200 DEG C of temperature, and vacuum environment keeps the temperature 2h, and air pressure is less than or equal to 100Pa in stove.
3. a kind of preparation method of short carbon fiber/carbon/carbon-copper composite material according to claim 1, it is characterised in that：
In step 2, the granularity of copper powder is less than or equal to 50 microns, and apparent density is 2.8~3g/cm3, the granularity of titanium valve is less than or equal to
74 microns, apparent density is 1.2~1.6g/cm3；The Ball-milling Time is 4~8h, ball：Material：The mass ratio of alcohol is 4~6:
0.5~1:0.3~0.5, the rotating speed of wet ball grinding is 180~300 turns/min；
In step 2, spare Cu/Ti powder is mixed with spare short carbon fiber in V-type blender by the component of design；
The composite granule uniformly mixed to short carbon fiber and metal powder；When mixing, control V-type batch mixing speed is 10~90r/min, when
Between be 1~10h.
4. a kind of preparation method of short carbon fiber/carbon/carbon-copper composite material according to claim 1, it is characterised in that：Step 3
In, discharge plasma sintering process is：It is first vacuumized with lobe pump, vacuum degree 0.05mbar, then with 30MPa pressure to dress
There is the mold of composite granule to carry out precompressed 20min, then 790~850 DEG C, pressure 5 are warming up to the speed of 50~100 DEG C/min
~25MPa, soaking time are 10~30min；After sintering, it is cooled to room temperature.
5. a kind of preparation method of short carbon fiber/carbon/carbon-copper composite material according to Claims 1 to 4 any one, feature
It is：The consistency of prepared short carbon fiber/carbon/carbon-copper composite material is more than or equal to 84.14%, and resistivity is less than or equal to 0.66 μ
Ω m, bending strength are greater than or equal to 241.84MPa.
6. a kind of preparation method of short carbon fiber/carbon/carbon-copper composite material according to claim 1, it is characterised in that；Including under
State step：
Step 1
After long carbon fiber is cut into short carbon fiber, it is put into high-temperature vacuum furnace, at 1200 DEG C, 2h is kept the temperature, cools to room temperature with the furnace, obtain
To spare short carbon fiber；
Step 2
It is less than or equal to the titanium valve of 50 Micron Copper Powders, granularity less than or equal to 74 microns as raw material using granularity；By ball：Material：The matter of alcohol
Amount is than being 2:1:0.3；Abrading-ball, raw material and alcohol are added in ball mill and carry out ball milling；The rotating speed of the ball milling be 300 turns/
Min, Ball-milling Time 8h；Obtain Cu/Ti powder；Gained Cu/Ti powder is dried under vacuum, obtains spare Cu/Ti
Powder；When drying under vacuum, the air pressure in control device is less than or equal to 0.09MPa, controlled at 50 DEG C；The copper
The mass ratio of powder and titanium valve is 5:1；
Spare Cu/Ti powder is mixed with spare short carbon fiber in V-type blender by the component of design；Obtain short carbon fiber
The composite granule being uniformly mixed with metal powder；The mass percentage of Ti is the matter of 9%, short carbon fiber in the composite granule
It is 3% to measure percentage composition；
Step 3
Composite granule obtained by step 2 is packed into mold, short carbon fiber/carbon/carbon-copper composite material is obtained using discharge plasma sintering；
Sintering parameter is that temperature is 850 DEG C, 10~30min of soaking time, and sintering pressure is 5~25MPa；Short carbon fiber/the copper is multiple
The consistency of condensation material be more than or equal to 99.32%, resistivity be the μ of 0.30.3~0.66 Ω m, bending strength be 550~
806MPa。
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