CN108841117A - A kind of long carbon fiber oriented composite material and preparation method thereof with Surface Texture - Google Patents
A kind of long carbon fiber oriented composite material and preparation method thereof with Surface Texture Download PDFInfo
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- CN108841117A CN108841117A CN201810400046.0A CN201810400046A CN108841117A CN 108841117 A CN108841117 A CN 108841117A CN 201810400046 A CN201810400046 A CN 201810400046A CN 108841117 A CN108841117 A CN 108841117A
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Abstract
The invention discloses a kind of long carbon fiber oriented composite material and preparation method thereof with Surface Texture, including micron order hard ceramic particle, short carbon fiber, long carbon fiber, surplus are polytetrafluoroethylene (PTFE)；Long carbon fiber is using the small synnema of 1K-24K or the big synnema of 24K or more；Preparation method is that weight percent weighs micron order hard ceramic particle, short carbon fiber and PTFE powder, carries out mechanical stirring；Mixture after stirring is uniformly spread in mold, and every spread equidistantly is spaced apart long carbon fiber synnema after one layer of mixture, and one layer of long carbon fiber synnema is repaved after placing into mixture, is so repeated, and is finally carried out cold moudling at room temperature and is obtained prefabricated component；Prefabricated component is put into Muffle furnace and is sintered, the finally obtained long carbon fiber oriented composite material with Surface Texture has high vibration and noise reducing performance, extremely strong wearability, extremely strong corrosion resistance, lower coefficient of friction and intensity is good.
Description
Technical field
The present invention relates to a kind of advanced composite material (ACM)s and preparation method thereof, in particular to a kind of have high abrasion
Property, corrosion-resistant, vibration and noise reducing performance is excellent, easily forms dynamic pressure oil film during hydrodynamic lubrication, and when dry friction easily forms self-lubricating
Effect reduces PTFE base long carbon fiber oriented composite material of coefficient of friction and preparation method thereof.
Background technique
Polytetrafluoroethylene (PTFE) has an excellent resistance to chemical corrosion as matrix, relatively low coefficient of friction, but its
Wearability is relatively poor, and mechanical performance, creep resistance are poor, especially wear resistance is poor, surface can low and bad adhesion
Etc. factors cause simple polytetrafluoroethylene material to be unfavorable for that wear-resisting bearing part is made, these defects limit to a certain extent
Therefore the extensive use of the material furthers investigate the property of PTFE, develop novel PTFE based composites and have become PTFE
Main research and development direction.
In order to make full use of the superperformance of polytetrafluoroethylene (PTFE), its corrosion resistant property is played, selection is made pottery with hard
Porcelain particle or short carbon fiber are filled, and in order to make polytetrafluoroethylene (PTFE) have the special property of filler, make up poly- four
The poor mechanicalness of vinyl fluoride itself, wearability, creep resistant and wear resistance.
Hard ceramic particle includes silicon carbide, silicon nitride, silica, aluminium oxide, boron nitride etc., hard ceramic particle tool
There are good wearability, lubricity and other mechanical performances.High hardness material made of silicon carbide has resistance to thermal shock, volume
Small, light weight and the advantages that high intensity, the very stable wearability of the chemical property of silicon carbide is good, and hardness is very big, has excellent lead
Hot property, is a kind of semiconductor, and when high temperature can be anti-oxidant.Silicon nitride is a kind of superhard material, itself has lubricity, and
It is wear-resistant, it is atomic crystal；It is anti-oxidant when high temperature.And it can also resist cooling thermal impact, be heated in air 1000 DEG C with
On, quick refrigeration sharply heats again, will not fragmentation, mechanical strength with higher.Silica chemistry is more stable,
It is not soluble in water also not with water react, do not react with general acid, the property torpescence of silica, it not with fluorine removal, fluorination
Halogen, hydrogen halides and sulfuric acid, nitric acid, perchloric acid effect other than hydrogen.Silica is added in rubber, and rubber can be improved
Wear resistance can improve the wearability and anti-slippery of tire, use the glue of silica while can reducing tire drag
Material tensile strength, tearing strength, wearability etc. are improved.Aluminium oxide ceramics is one kind with Al2O3For primary raw material, with corundum
For the ceramic material of principal crystalline phase, because it is with high mechanical strength, hardness is big, and high-frequency dielectric loss is small, and high-temperature insulation resistance is high, resistance to
The advantages such as chemical corrosivity and the well equal excellent combinations technical performance of thermal conductivity.Boron nitride thermal stability and wearability are good, simultaneously
Chemical stability is very strong, therefore is also one of the primary raw material of ceramic material.The PTFE base composite wood of single filling ceramic particle
Material, although attached the wearability of ceramic particle, while improving the hardness of composite material, so that composite material has hard
The lubricity of ceramic particle improves mechanical strength, but single filling hard ceramic particle makes the hard of gained composite material
Brittleness improves, so that the novel PTFE based composites of gained are not easy in the environment of work has an impact.
Short carbon fiber is high intensity, the new fiber materials of high modulus fibre of a kind of phosphorus content 95% or more, can also
Using one kind of the filler as ptfe composite, specific gravity is small, shows very high intensity along fiber axis direction,
Carbon fiber also has good resistance to low temperature, also not brittle such as under liquid nitrogen temperature, the material of the bearing as bad working environments
Its superiority is then embodied.In addition, short carbon fiber quality is lighter than metallic aluminium, but intensity is higher than steel, and has corrosion resistant
Erosion, high-modulus characteristic, density is low, higher than performance, no creep, and superhigh temperature resistant under non-oxidizing atmosphere, fatigue durability is good, specific heat and
For electric conductivity between nonmetallic between metal, thermal expansion coefficient is small and has anisotropy, good corrosion resistance, X-ray transparent
It is good.When single filling short carbon fiber, gained composite material has the lower temperature resistance of short carbon fiber, even if short carbon fiber is in liquid nitrogen ring
Will not be brittle under border, this point compensates for the deficiency of hard ceramic particle, and the material of the bearing as bad working environments then embodies
Go out its superiority, but lacks the superior functions such as the wearability of hard ceramic particle, lubricity.
Summary of the invention
The present invention is to solve composite-material abrasive, vibration and noise reducing and intensity, promotes the various aspects such as friction, lubrication effect
The problem of, overcome single filling PTFE material wear resistance poor, hardness is low, the feature of creep resistant and heating conduction difference, and needle
The coefficient of friction proposed to specific requirement is low, and friction, lubrication performance waits require well, and the micron order hard of specific proportion is made pottery
Porcelain particle and short carbon fiber mixing filling, long carbon fiber oriented alignment in the extremely strong PTFE material of corrosion resistance, and according to
The shaping characteristic of PTFE material selects the mode of compacting, sintering by micron order hard ceramic particle, the short carbon fiber of itself and filling
It sticks together with long carbon fiber；It is this to fill PTFE using hard ceramic particle, short carbon fiber and the specific proportion of long carbon fiber
Advanced composite material (ACM) is made in base, has been provided simultaneously with the high rigidity, wearability and lubricity of hard ceramic particle, short carbon fiber
The small feature of specific gravity and resistance to low temperature, the dynamic pressure oil film or self-lubrication that the Surface Texture of long carbon fiber oriented structure is formed
Can, the comprehensive performance of composite material is improved, coefficient of friction and wear rate are significantly reduced, improves the strength of materials.
In order to solve the above-mentioned technical problem, the present invention is achieved by technical solution below：
A kind of long carbon fiber oriented composite material with Surface Texture, is prepared from the following raw materials according to weight percent：
The micron order hard ceramic particle of 3-20wt%, the short carbon fiber of 3-20wt%, the long carbon fiber of 3-30wt% are remaining
Amount is polytetrafluoroethylene (PTFE)；
The long carbon fiber is after the stirring of the micron order hard ceramic particle, the short carbon fiber and the PTFE powder
Mixture in orientation uniformly arrangement, the long carbon fiber using 1K-24K small synnema or 24K or more big synnema, according to weight
The equidistant array that the long carbon fiber that amount percentage determines is parallel to each other in prefabricated-member mould space according to synnema；
The micron order hard ceramic particle diameter section is 0.1-5 microns, and the short carbon fiber crosses 400 meshes；It is described
Long carbon fiber diameter is 6-7 microns；The polytetrafluoroethylene (PTFE) uses average grain diameter for 10-30 microns of PTFE powder.
Preferably, the micron order hard ceramic particle is micron order carborundum particle, micron order silicon nitride particles, micron
Grade silicon dioxide particle, micron order boron nitride particles or micron order aluminium oxide particles.
Preferably, the weight percent of the micron order hard ceramic particle is 5wt%, the weight hundred of the short carbon fiber
Score is 15wt%, and the weight percent of the long carbon fiber is 20wt%, the long carbon fiber model 3K.
Preferably, described long carbon fiber model 1K, 3K, 6K, 24K.
A kind of preparation method of the long carbon fiber oriented composite material with Surface Texture, this method in accordance with the following steps into
Row：
(1) weight percent weighs the micron order hard ceramic particle, the short carbon fiber and the PTFE powder,
Mechanical stirring is carried out after mixing；
(2) according to the micron order hard ceramic particle, the short carbon fiber, the PTFE powder, the long carbon fiber
Weight percent and die space, calculate the long carbon fiber according to synnema in the medium pitch arrays in prefabricated-member mould space
Set distance, and the long carbon fiber synnema is intercepted into identical with mold length；
(3) mixture after step (1) stirring is uniformly spread in mold, the set distance obtained according to step (2) is every
It is described after intercepted length is equidistantly spaced apart according to the set distance that step (2) obtains after spreading one layer of mixture
Long carbon fiber synnema, after one layer of long carbon fiber synnema is placed, the set distance obtained according still further to step (2) is spread into institute
Mixture is stated, so repeats to raw material to use up, cold moudling is finally carried out at room temperature and obtains prefabricated component；
(4) prefabricated component is put into Muffle furnace and is sintered, it is multiple to obtain the long carbon fiber orientation with Surface Texture
Condensation material.
Preferably, the micron order hard ceramic particle in step (1) is micron order carborundum particle, micron order nitridation
Silicon particle, micron silica particle, micron order boron nitride particles or micron order aluminium oxide particles.
Preferably, the weight percent of the micron order hard ceramic particle is 5wt%, the weight hundred of the short carbon fiber
Score is 15wt%, and the weight percent of the long carbon fiber is 20wt%, the long carbon fiber model 3K.
Preferably, the pressure of cold moudling is 25 ± 5Mpa in step (3), and the dwell time is 40 ± 10min, pressure maintaining temperature
For room temperature.
Preferably, sintering procedure described in step (4) is：327 DEG C are warming up to from 30 DEG C, heating rate is 100 DEG C/h；?
327 DEG C of heat preservation 30min；380 DEG C are warming up to from 327 DEG C, heating rate is 60 DEG C/h；In 380 DEG C of heat preservation 1h；Cool down from 380 DEG C
To 327 DEG C, heating rate is 60 DEG C/h；In 327 DEG C of heat preservation 30min；It is cooled to 150 DEG C from 327 DEG C, rate of temperature fall is 100 DEG C/
h；Room temperature is air-cooled to after reaching 150 DEG C.
The beneficial effects of the invention are as follows：
The novel long carbon fiber oriented composite material that the present invention is prepared takes full advantage of the good of hard ceramic particle
Hardness performance plays profit in forming fine and close transfer membrane with hard ceramic particle to the supporting role in flour milling abrasive dust
Sliding effect；The microstructure of entire composite material is closely connected one by strip short carbon fiber under the package of polytetrafluoroethylene (PTFE)
It rises, so that matrix is more stable, is conducive to be detained hard ceramic particle or limits the movement of ceramic particle；The long carbon of oriented alignment
Fiber helps to form Surface Texture in friction process, convenient for the formation of dynamic pressure oil film or self-lubricating phenomenon.Short carbon fiber has
The intrinsic intrinsic property of carbon material itself has good lubricant effect, but its poor impact resistance, so in friction process
Abrasion it is very big, and hard ceramic particle reduces composite material entirety in the intensity for wherein exactly improving entire polymer
The rate of wear, while the long carbon fiber of oriented alignment facilitates the formation of dynamic pressure oil film or self-lubricating phenomenon.Short carbon fiber with
The effect of hard ceramic particle cooperative effect is influenced very big by mixting ratio factor, when the weight ratio shared by the ceramic particle is excessive, is gathered
It closes the hard brittleness of object to significantly improve, integrally-built intensity is decreased obviously；When short carbon fiber proportion is excessive, whole is wear-resisting
Property can degradation.Facilitate long carbon fiber proportion and synnema model that Surface Texture is formed during friction, lubrication
It affecting as the overall performance of powdered mixture polymer made of cold-rolled sintered, accounting is excessive, and matrix is not wrapped strong,
It is not easy cold moudling；Accounting is too small, synnema is excessive or too small, and the Surface Texture of formation is excessive, unfavorable formation dynamic pressure oil film or from
Lubricant effect.Experiment discovery：Proportion of the invention given, i.e. the micron order hard ceramic particle of 3-20wt% and 3-20wt%'s
Short carbon fiber matches, the long carbon fiber and type of the uniform arrangement about 3-30wt% of orientation in the mixture that filled polytetrafluoroethylene is formed
Obtained novel PTFE base long carbon fiber oriented composite material collaboration when number being small synnema 1K, 3K, 6K or big synnema 24K or more
Effect and self-lubricating property are more significant, and performance is more excellent.Under this proportion, the present invention is excellent by hard ceramic particle and carbon fiber
Gesture performs to maximum.
Due to table during friction, lubrication of synergistic effect and long carbon fiber of hard ceramic particle and short carbon fiber
Plane texture, so that the novel PTFE base long carbon fiber oriented composite material being prepared has high vibration and noise reducing performance, pole
Strong wearability and superpower greasy property.Using PTFE as matrix, the micron order for being 0.1-5 microns using particle size interval
Hard ceramic particle and the short carbon fiber for crossing 400 meshes are filled, and the long carbon fiber that oriented alignment diameter is 6-7 microns
Beam；Support bonding effect of the short carbon fiber in polytetrafluoroethylene (PTFE) provides during playing lubricating action for hard ceramic particle
Solid structure basis, long carbon fiber help to form dynamic pressure oil film or self-lubricating during friction, lubrication using Surface Texture
Effect in turn ensures the integrally-built integrality of polymer, PTFE of the invention while effectively reducing coefficient of friction
The filler proportion of base long carbon fiber oriented composite material is that the weight percent of silicon carbide is 5wt%, the weight of short carbon fiber
Percentage is 15wt%, the long carbon fiber and the small synnema of model of oriented alignment about 20% in the mixture formed with tetrafluoroethene
When 3K, it is effectively reduced coefficient of friction and abrasion loss.
Detailed description of the invention
Fig. 1 is the cross-sectional view for the long carbon fiber oriented composite material that embodiment 1 is finally sintered to form, shown in figure section line
It is the long carbon fiber beam of oriented alignment；
Fig. 2 is the axonometric drawing for the long carbon fiber oriented composite material that embodiment 1 is finally sintered to form, shown in figure section line
It is the long carbon fiber beam of oriented alignment.
Specific embodiment
Below by specific embodiment, the present invention is described in further detail：
Following embodiment can make those skilled in the art that the present invention be more completely understood, but not limit this in any way
Invention.
Embodiment 1：
A kind of long carbon fiber oriented composite material with Surface Texture is prepared, steps are as follows：
Step 1: micron order hard ceramic particle silicon carbide, short carbon fiber, long carbon fiber and PTFE material are weighed,
Middle filler proportion is that the weight percent of micron order hard ceramic particle silicon carbide is 5wt%, the weight percent of short carbon fiber
Number is 15wt%, and the weight percent of long carbon fiber is 20wt%, and surplus is polytetrafluoroethylene (PTFE).Micron order hard ceramic particulate carbon
SiClx particle size interval is 0.1-0.4 microns, and short carbon fiber crosses 400 meshes, and the long carbon fiber diameter is 6-7 microns, long carbon fiber
Model 3K is tieed up, polytetrafluoroethylene (PTFE) uses average grain diameter for 10-30 microns of PTFE powder.Silicon carbide is weighed when being stirred
Amount is 7.5g, and short carbon fiber quality is 22.5g, and long carbon fiber quality is 30g, and PTFE mass is 90g.
Step 2: by the weighed micron order hard ceramic particle of step 1, short carbon fiber and PTFE powder mixing carry out machine
Tool stirring.
Step 3: according to the weight percent of micron order hard ceramic particle, short carbon fiber, PTFE powder, long carbon fiber
And die space, calculate long carbon fiber according to synnema the medium pitch arrays in prefabricated-member mould space set distance, and will
Long carbon fiber synnema intercepts length identical with mold；
Step 4: the mixture after step 2 is stirred uniformly is spread in mold, the set distance obtained according to step 3
It is every spread one layer of mixture after, the set distance obtained according to step 3 is equidistantly spaced apart the long carbon fiber after intercepted length
Synnema, after one layer of long carbon fiber synnema is placed, the set distance obtained according still further to step 3 is spread into mixture, is so repeated
It is used up to raw material, finally carries out cold moudling at room temperature and obtain prefabricated component, as depicted in figs. 1 and 2；Wherein, cold moudling
Pressure is 25 ± 5Mpa, and the dwell time is 40 ± 10min, and pressure maintaining temperature is room temperature；
It is sintered Step 4: prefabricated component is put into Muffle furnace, obtains having the long carbon fiber orientation of Surface Texture multiple
Condensation material.Sintering procedure：327 DEG C are warming up to from 30 DEG C, heating rate is 100 DEG C/h；In 327 DEG C of heat preservation 30min；From 327 DEG C
380 DEG C are warming up to, heating rate is 60 DEG C/h；In 380 DEG C of heat preservation 1h；It is cooled to 327 DEG C from 380 DEG C, heating rate is 60 DEG C/
h；In 327 DEG C of heat preservation 30min；150 DEG C are cooled to from 327 DEG C, rate of temperature fall is 100 DEG C/h；Room is air-cooled to after reaching 150 DEG C
Temperature.
Embodiment 2：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 1 walks
It is rapid essentially identical, it is different only in that：Raw material composition ratio is different in step 1, i.e. the weight of micron order hard ceramic particle silicon carbide
Amount percentage is 3wt%, and the weight percent of short carbon fiber is 3wt%.It is 4.5g that silicon carbide quality is weighed when being stirred, short
Carbon fiber quality is 4.5g.
Embodiment 3：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 1 walks
It is rapid essentially identical, it is different only in that：Raw material composition ratio is different in step 1, i.e. the weight of micron order hard ceramic particle silicon carbide
Amount percentage is 20wt%, and the weight percent of short carbon fiber is 20wt%.It is 30g that silicon carbide quality is weighed when being stirred,
Short carbon fiber quality is 30g.
Embodiment 4：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 1 walks
It is rapid essentially identical, it is different only in that：Raw material composition ratio is different in step 1, i.e., the weight percent of long carbon fiber is 3%.It stirs
It is 4.5g that long carbon fiber quality is weighed when mixing mixing.
Embodiment 5：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 1 walks
It is rapid essentially identical, it is different only in that：Raw material composition ratio is different in step 1, i.e., the weight percent of long carbon fiber is 30%.
It is 45g that long carbon fiber quality is weighed when being stirred.
Embodiment 6：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 1 walks
It is rapid essentially identical, it is different only in that：Raw material model is different in step 1, i.e. the model 1K of long carbon fiber.
Embodiment 7：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 1 walks
It is rapid essentially identical, it is different only in that：Raw material model is different in step 1, i.e. the model 24K of long carbon fiber.
Embodiment 8：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 1 walks
It is rapid essentially identical, it is different only in that：Raw material constituent is different in step 1, i.e. micron order hard ceramic particle silicon carbide is changed to
Micron order hard ceramic particle silicon nitride, micron order hard ceramic particle silicon nitride particle size interval are 0.1-0.4 microns.
Embodiment 9：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 8 walks
It is rapid essentially identical, it is different only in that：Raw material composition ratio is different in step 1, i.e. the weight of micron order hard ceramic particle silicon nitride
Amount percentage is 3wt%, and the weight percent of short carbon fiber is 3wt%.It is 4.5g that silicon nitride quality is weighed when being stirred, short
Carbon fiber quality is 4.5g.
Embodiment 10：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 8 walks
It is rapid essentially identical, it is different only in that：Raw material composition ratio is different in step 1, i.e. the weight of micron order hard ceramic particle silicon nitride
Amount percentage is 20wt%, and the weight percent of short carbon fiber is 20wt%.It is 30g that silicon nitride quality is weighed when being stirred,
Short carbon fiber quality is 30g.
Embodiment 11：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 8 walks
It is rapid essentially identical, it is different only in that：Raw material composition ratio is different in step 1, i.e., the weight percent of long carbon fiber is 3%.It stirs
It is 4.5g that long carbon fiber quality is weighed when mixing mixing.
Embodiment 12：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 8 walks
It is rapid essentially identical, it is different only in that：Raw material composition ratio is different in step 1, i.e., the weight percent of long carbon fiber is 30%.
It is 45g that long carbon fiber quality is weighed when being stirred.
Embodiment 13：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 8 walks
It is rapid essentially identical, it is different only in that：Raw material model is different in step 1, i.e. the model 1K of long carbon fiber.
Embodiment 14：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 8 walks
It is rapid essentially identical, it is different only in that：Raw material model is different in step 1, i.e. the model 24K of long carbon fiber.
Embodiment 15：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 1 walks
It is rapid essentially identical, it is different only in that：Raw material constituent is different in step 1, i.e. micron order hard ceramic particle silicon carbide is changed to
Micron order hard ceramic particle silica, micron order hard ceramic particle silica particle size interval are 0.4-2 microns.
Embodiment 16：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 15
Step is essentially identical, is different only in that：Raw material composition ratio is different in step 1, i.e. micron order hard ceramic particle silica
Weight percent be 3wt%, the weight percent of short carbon fiber is 3wt%.Silica quality is weighed when being stirred is
4.5g, short carbon fiber quality are 4.5g.
Embodiment 17：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 15
Step is essentially identical, is different only in that：Raw material composition ratio is different in step 1, i.e. micron order hard ceramic particle silica
Weight percent be 20wt%, the weight percent of short carbon fiber is 20wt%.Silica quality is weighed when being stirred
For 30g, short carbon fiber quality is 30g.
Embodiment 18：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 15
Step is essentially identical, is different only in that：Raw material composition ratio is different in step 1, i.e., the weight percent of long carbon fiber is 3%.
It is 4.5g that long carbon fiber quality is weighed when being stirred.
Embodiment 19：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 15
Step is essentially identical, is different only in that：Raw material composition ratio is different in step 1, i.e. the weight percent of long carbon fiber is
30%.It is 45g that long carbon fiber quality is weighed when being stirred.
Embodiment 20：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 15
Step is essentially identical, is different only in that：Raw material model is different in step 1, i.e. the model 1K of long carbon fiber.
Embodiment 21：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 15
Step is essentially identical, is different only in that：Raw material model is different in step 1, i.e. the model 24K of long carbon fiber.
Embodiment 22：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 1 walks
It is rapid essentially identical, it is different only in that：Raw material constituent is different in step 1, i.e. micron order hard ceramic particle silicon carbide is changed to
Micron order hard ceramic particle boron nitride, micron order hard ceramic particle boron nitride particle size interval are 2-5 microns.
Embodiment 23：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 22
Step is essentially identical, is different only in that：In step 1 raw material composition ratio is different, i.e. micron order hard ceramic particle boron nitride
Weight percent is 3wt%, and the weight percent of short carbon fiber is 3wt%.It is 4.5g that boron nitride quality is weighed when being stirred,
Short carbon fiber quality is 4.5g.
Embodiment 24：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 22
Step is essentially identical, is different only in that：In step 1 raw material composition ratio is different, i.e. micron order hard ceramic particle boron nitride
Weight percent is 20wt%, and the weight percent of short carbon fiber is 20wt%.Boron nitride quality is weighed when being stirred is
30g, short carbon fiber quality are 30g.
Embodiment 25：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 22
Step is essentially identical, is different only in that：Raw material composition ratio is different in step 1, i.e., the weight percent of long carbon fiber is 3%.
It is 4.5g that long carbon fiber quality is weighed when being stirred.
Embodiment 26：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 22
Step is essentially identical, is different only in that：Raw material composition ratio is different in step 1, i.e. the weight percent of long carbon fiber is
30%.It is 45g that long carbon fiber quality is weighed when being stirred.
Embodiment 27：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 22
Step is essentially identical, is different only in that：Raw material model is different in step 1, i.e. the model 1K of long carbon fiber.
Embodiment 28：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 22
Step is essentially identical, is different only in that：Raw material model is different in step 1, i.e. the model 24K of long carbon fiber.
Embodiment 29：A kind of long carbon fiber oriented composite material with Surface Texture is prepared, the preparation with embodiment 1 walks
It is rapid essentially identical, it is different only in that：Raw material constituent is different in step 1, i.e. micron order hard ceramic particle silicon carbide is changed to
Micron order hard ceramic particle alumina, micron order hard ceramic particle alumina particle size interval are 2-5 microns.
Embodiment 30：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 29
Step is essentially identical, is different only in that：In step 1 raw material composition ratio is different, i.e. micron order hard ceramic particle alumina
Weight percent is 3wt%, and the weight percent of short carbon fiber is 3wt%.It is 4.5g that quality of alumina is weighed when being stirred,
Short carbon fiber quality is 4.5g.
Embodiment 31：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 29
Step is essentially identical, is different only in that：In step 1 raw material composition ratio is different, i.e. micron order hard ceramic particle alumina
Weight percent is 20wt%, and the weight percent of short carbon fiber is 20wt%.Quality of alumina is weighed when being stirred is
30g, short carbon fiber quality are 30g.
Embodiment 32：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 29
Step is essentially identical, is different only in that：Raw material composition ratio is different in step 1, i.e., the weight percent of long carbon fiber is 3%.
It is 4.5g that long carbon fiber quality is weighed when being stirred.
Embodiment 33：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 29
Step is essentially identical, is different only in that：Raw material composition ratio is different in step 1, i.e. the weight percent of long carbon fiber is
30%.It is 45g that long carbon fiber quality is weighed when being stirred.
Embodiment 34：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 29
Step is essentially identical, is different only in that：Raw material model is different in step 1, i.e. the model 1K of long carbon fiber.
Embodiment 35：Prepare a kind of long carbon fiber oriented composite material with Surface Texture, the preparation with embodiment 29
Step is essentially identical, is different only in that：Raw material model is different in step 1, i.e. the model 24K of long carbon fiber.
Although the preferred embodiment of the present invention is described above in conjunction with attached drawing, the invention is not limited to upper
The specific embodiment stated, the above mentioned embodiment is only schematical, be not it is restrictive, this field it is common
Technical staff under the inspiration of the present invention, can be with when not departing from invention objective and scope of the claimed protection
The specific transformation of many forms is made, within these are all belonged to the scope of protection of the present invention.
Claims (9)
1. a kind of long carbon fiber oriented composite material with Surface Texture, which is characterized in that according to weight percent by following
Raw material is made：
The micron order hard ceramic particle of 3-20wt%, the short carbon fiber of 3-20wt%, the long carbon fiber of 3-30wt%, surplus are
Polytetrafluoroethylene (PTFE)；
The long carbon fiber is mixed after the stirring of the micron order hard ceramic particle, the short carbon fiber and the PTFE powder
Orientation uniformly arrangement in object is closed, the long carbon fiber is using the small synnema of 1K-24K or the big synnema of 24K or more, according to weight hundred
The equidistant array that the long carbon fiber that score determines is parallel to each other in prefabricated-member mould space according to synnema；
The micron order hard ceramic particle diameter section is 0.1-5 microns, and the short carbon fiber crosses 400 meshes；The long carbon
Fibre diameter is 6-7 microns；The polytetrafluoroethylene (PTFE) uses average grain diameter for 10-30 microns of PTFE powder.
2. a kind of long carbon fiber oriented composite material with Surface Texture according to claim 1, which is characterized in that institute
State micron order hard ceramic particle be micron order carborundum particle, it is micron order silicon nitride particles, micron silica particle, micro-
Meter level boron nitride particles or micron order aluminium oxide particles.
3. a kind of long carbon fiber oriented composite material with Surface Texture according to claim 1, which is characterized in that institute
The weight percent for stating micron order hard ceramic particle is 5wt%, and the weight percent of the short carbon fiber is 15wt%, described
The weight percent of long carbon fiber is 20wt%, the long carbon fiber model 3K.
4. a kind of long carbon fiber oriented composite material with Surface Texture according to claim 1, which is characterized in that institute
State long carbon fiber model 1K, 3K, 6K, 24K.
5. a kind of preparation method of the long carbon fiber oriented composite material with Surface Texture as described in claim 1, feature
It is, this method carries out in accordance with the following steps：
(1) weight percent weighs the micron order hard ceramic particle, the short carbon fiber and the PTFE powder, mixing
After carry out mechanical stirring；
(2) according to the micron order hard ceramic particle, the short carbon fiber, the PTFE powder, the long carbon fiber weight
Measure percentage and die space, calculate the long carbon fiber according to synnema setting in the medium pitch arrays in prefabricated-member mould space
Set a distance, and the long carbon fiber synnema is intercepted into length identical with mold；
(3) mixture after step (1) stirring is uniformly spread in mold, the set distance obtained according to step (2) is every spread into
The long carbon after one layer of mixture, after intercepted length is equidistantly spaced apart according to the set distance that step (2) obtains
Filament tow, after one layer of long carbon fiber synnema is placed, the set distance obtained according still further to step (2) is spread into described mixed
Object is closed, so repeats to raw material to use up, cold moudling is finally carried out at room temperature and obtains prefabricated component；
(4) prefabricated component is put into Muffle furnace and is sintered, obtain the long carbon fiber orientation composite wood with Surface Texture
Material.
6. a kind of preparation method of long carbon fiber oriented composite material with Surface Texture according to claim 5,
It is characterized in that, the micron order hard ceramic particle in step (1) is micron order carborundum particle, micron order nitridation silicon grain
Son, micron silica particle, micron order boron nitride particles or micron order aluminium oxide particles.
7. a kind of preparation method of long carbon fiber oriented composite material with Surface Texture according to claim 5,
It is characterized in that, the weight percent of the micron order hard ceramic particle is 5wt%, and the weight percent of the short carbon fiber is
15wt%, the weight percent of the long carbon fiber are 20wt%, the long carbon fiber model 3K.
8. a kind of preparation method of long carbon fiber oriented composite material with Surface Texture according to claim 5,
It is characterized in that, the pressure of cold moudling is 25 ± 5Mpa in step (3), and the dwell time is 40 ± 10min, and pressure maintaining temperature is room
Temperature.
9. a kind of preparation method of long carbon fiber oriented composite material with Surface Texture according to claim 5,
It is characterized in that, sintering procedure described in step (4) is：327 DEG C are warming up to from 30 DEG C, heating rate is 100 DEG C/h；At 327 DEG C
Keep the temperature 30min；380 DEG C are warming up to from 327 DEG C, heating rate is 60 DEG C/h；In 380 DEG C of heat preservation 1h；327 are cooled to from 380 DEG C
DEG C, heating rate is 60 DEG C/h；In 327 DEG C of heat preservation 30min；150 DEG C are cooled to from 327 DEG C, rate of temperature fall is 100 DEG C/h；It arrives
Room temperature is air-cooled to after up to 150 DEG C.
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| CN114131015A (en) * | 2021-12-13 | 2022-03-04 | 上海交通大学 | Confined powder filling method for preparing configuration composite material |
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| CN104379656A (en) * | 2012-01-27 | 2015-02-25 | 3M创新有限公司 | Polytetrafluoroethene compound with microspheres and fibers |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114131015A (en) * | 2021-12-13 | 2022-03-04 | 上海交通大学 | Confined powder filling method for preparing configuration composite material |
| CN114131015B (en) * | 2021-12-13 | 2023-07-11 | 上海交通大学 | Limited-field powder filling method for preparing configuration composite material |
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