CN108103422A - A kind of plating Cu short carbon fiber reinforced Cu based composites - Google Patents

A kind of plating Cu short carbon fiber reinforced Cu based composites Download PDF

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Publication number
CN108103422A
CN108103422A CN201611045308.3A CN201611045308A CN108103422A CN 108103422 A CN108103422 A CN 108103422A CN 201611045308 A CN201611045308 A CN 201611045308A CN 108103422 A CN108103422 A CN 108103422A
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carbon fiber
plating
short carbon
based composites
short
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刘芳
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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
    • C22C47/02—Pretreatment of the fibres or filaments
    • C22C47/04—Pretreatment of the fibres or filaments by coating, e.g. with a protective or activated covering
    • 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
    • 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
    • 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
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/1601—Process or apparatus
    • C23C18/1633—Process of electroless plating
    • C23C18/1655—Process features
    • C23C18/1664—Process features with additional means during the plating process
    • C23C18/1669—Agitation, e.g. air introduction
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/18—Pretreatment of the material to be coated
    • C23C18/1851—Pretreatment of the material to be coated of surfaces of non-metallic or semiconducting in organic material
    • C23C18/1872—Pretreatment of the material to be coated of surfaces of non-metallic or semiconducting in organic material by chemical pretreatment
    • C23C18/1886—Multistep pretreatment
    • C23C18/1893—Multistep pretreatment with use of organic or inorganic compounds other than metals, first
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
    • C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
    • C23C18/31—Coating with metals
    • C23C18/38—Coating with copper
    • C23C18/40—Coating with copper using reducing agents

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Electroplating Methods And Accessories (AREA)
  • Chemically Coating (AREA)

Abstract

A kind of plating Cu short carbon fiber reinforced Cu based composites, are prepared for short carbon fiber reinforced Cu based composites to improve the performances such as the density of Cu based composites, hardness and electrical conductivity by powder metallurgy.380 DEG C of calcination 30min is used to remove adhesive process for preferable carbon fiber；Compared with ultrasonic disperse and magnetic agitation, using short carbon fiber good dispersion during electric stirring, and Electroless Cu Plating coating even compact.With the increase of plating Cu short carbon fiber contents, downward trend is presented in the density and electrical conductivity of composite material, and hardness presentation first improves the trend reduced afterwards, wherein when plating Cu short carbon fibers content up to 12.5%, Cu based composites hardness number highests；The physical property for plating the short carbon fiber Cu based composites of Cu is better than not plating the short carbon fiber material of Cu.

Description

A kind of plating Cu short carbon fiber reinforced Cu based composites
Technical field
The present invention relates to a kind of powdered metallurgical material more particularly to a kind of plating Cu short carbon fiber reinforced Cu based composites.
Background technology
Fibre reinforced Cu based composites show excellent mechanical property, wearability, heat-resisting quantity, arc ablation resistance Property and the series of advantages such as good self lubricity, be now widely used in machinery as a kind of metal-base composites The fields such as manufacture, aerospace.It is handed in particular for manufacture brush, bearing shell, sliding block, electric shock, cooling integrated plate, track Logical pantograph pan etc..
But since the wetability of carbon fiber and Cu matrixes is poor, the two direct combination cannot not only play enhancing matrix Effect, weaken the performance of composite material instead.Thus, the fibre reinforced Cu based composites that processability is excellent, First have to solve the problems, such as carbon fiber and Cu matrixes wetability difference this.The wetability of carbon fiber and matrix to be improved improves interface With reference to power, it is necessary to carry out Electroless Cu Plating processing to carbon fiber.Carbon fiber front surface of dispatching from the factory can all adhere to one layer of organic gel so that carbon Surface inertness, hydrophobicity and smooth is presented in fiber surface, it is difficult to directly carry out Electroless Cu Plating, therefore is needed before plating Cu to carbon fiber Carry out removing glue processing.
The content of the invention
The purpose of the invention is to improve the performances such as the density of Cu-base composites, hardness, electrical conductivity, one kind is devised Plate Cu short carbon fiber reinforced Cu based composites.
The technical solution adopted by the present invention to solve the technical problems is：
The raw material for preparing of plating Cu short carbon fiber reinforced Cu based composites includes：The beautiful 13K in carbon fiber model east, filament diameter are 7 μm, the short carbon fiber that carbon fiber is cut into 2mm long is spare.Plate the electrolysis Cu powder that Cu is more than 99.6% using purity, granularity 200 Mesh.
Plating Cu short carbon fiber reinforced Cu based composites preparation process be：To short carbon fiber carry out Electroless Cu Plating it Before, it is necessary to surface modification treatment is carried out to it.Mainly removing glue, roughening and hydrophily processing.Removing glue processing is carried out to carbon fiber Primarily to the organic gel of carbon fiber surface is removed, furthermore, the roughness of carbon fiber surface can also be increased, it is fine to improve carbon The wellability of dimension in the plating solution.Roughening process can enhance the surface roughness of carbon fiber, and it is in channel form to make carbon fiber surface, is The deposition of Cu provides facility.Concentrated nitric acid is selected to be roughened.Then, hydrophily processing is carried out to short carbon fiber with NaOH, be used in combination Deionized water cleans carbon fiber repeatedly, until washing lotion is in neutrality.It selects without being sensitized activation formaldehyde reduction system chemical plating Cu techniques, the copper facing technology flow is relatively simple, and efficiency is higher.Its plating solution is the CuSO of 15g/L4·5H2O, 30g/L's Na2The CH of EDTA, 12mL/L2(the C of O, 0.1g/L5H4N)2.Plating test technology parameter：Bath temperature is 65 DEG C, passes through addition It is 13 that NaOH solution, which adjusts pH value, and ultrasonic disperse, magnetic agitation and electric stirring mode, which is respectively adopted, uniformly disperses carbon fiber. The morphology of carbon fibers before and after plating Cu is observed using SEM, coating analysis is done using XRD, so that it is determined that preferable copper facing technology.Using The method compacting Cu base short carbon fiber materials of cold moudling, are pressed in experiment using powder compressing machine, Under 200MPa pressure, pressurize 5min.The test block of compression moulding is subjected to vacuum-sintering, and sintered test block is pressed again System sintering, to improve consistency.
Plating Cu short carbon fiber reinforced Cu based composites detecting step be：Using the close of drainage test compound material Degree measures the hardness of composite material using HXD-1000TMC microhardness testers, using SB2230 type DC digital resistance meters Measure the resistance of composite material.
The beneficial effects of the invention are as follows：
It is to prepare high quality, the key point of high-purity plating Cu carbon fibers that chemical Pre-treatment before plating is carried out to carbon fiber.Carbon is fine Dimension calcination 30min at 380 DEG C can preferably remove the Protection glue of carbon fiber surface, and concentrated nitric acid roughening can improve carbon fiber surface The roughness in face.Carbon fiber surface has catalytic effect in face of Electroless Cu Plating, using formaldehyde reduction system without works such as sensitization, activation Sequence directly can carry out Electroless Cu Plating in fiber surface, simplify technological process.When using electric stirring during chemical plating, Heavy Cu phenomenons are not likely to produce in plating solution, Cu layers of the plating of acquisition is more complete uniformly.The density and electricity of short carbon fiber Cu based composites Conductance all reduces with the increase of short carbon fiber volume fraction, and hardness is in first to improve with the increase of short carbon fiber content The trend reduced afterwards, wherein Cu based composites hardness reaches maximum when plating Cu short carbon fibers content up to 12.5%.Plate Cu's The performance of short carbon fiber material is better than not plating the short carbon fiber material of Cu.
Specific embodiment
Case study on implementation 1：
The raw material for preparing of plating Cu short carbon fiber reinforced Cu based composites includes：The beautiful 13K in carbon fiber model east, filament diameter are 7 μm, the short carbon fiber that carbon fiber is cut into 2mm long is spare.Plate the electrolysis Cu powder that Cu is more than 99.6% using purity, granularity 200 Mesh.Plating Cu short carbon fiber reinforced Cu based composites preparation process be：Before Electroless Cu Plating is carried out to short carbon fiber, it is necessary to Surface modification treatment is carried out to it.Mainly removing glue, roughening and hydrophily processing.Removing glue processing is carried out to carbon fiber is mainly The organic gel of carbon fiber surface is removed, furthermore, the roughness of carbon fiber surface can also be increased, to improve carbon fiber in plating solution In wellability.Roughening process can enhance the surface roughness of carbon fiber, make carbon fiber surface in channel form, the deposition for being Cu Facility is provided.Concentrated nitric acid is selected to be roughened.Then, hydrophily processing is carried out to short carbon fiber with NaOH, and uses deionized water Carbon fiber is cleaned repeatedly, until washing lotion is in neutrality.It selects without being sensitized activation formaldehyde reduction system Electroless Cu Plating technique, it should Copper facing technology flow is relatively simple, and efficiency is higher.Its plating solution is the CuSO of 15g/L4·5H2The Na of O, 30g/L2EDTA, The CH of 12mL/L2(the C of O, 0.1g/L5H4N)2.Plating test technology parameter：Bath temperature is 65 DEG C, by adding in NaOH solution It is 13 to adjust pH value, and ultrasonic disperse, magnetic agitation and electric stirring mode, which is respectively adopted, uniformly disperses carbon fiber.Utilize SEM Morphology of carbon fibers before and after observation plating Cu, does coating analysis, so that it is determined that preferable copper facing technology using XRD.Using being cold-pressed into The method compacting Cu base short carbon fiber materials of type, are pressed using powder compressing machine in experiment, are pressed in 200MPa Under power, pressurize 5min.The test block of compression moulding is subjected to vacuum-sintering, and compacting sintering again is carried out to sintered test block, To improve consistency.Plating Cu short carbon fiber reinforced Cu based composites detecting step be：Using drainage test compound material Density, using HXD-1000TMC microhardness testers measure composite material hardness, using SB2230 type DC digitals resistance survey Try the resistance that instrument measures composite material.
Case study on implementation 2：
In calcination time 30min, at 340-380 DEG C, burn tinctuer increases calcination temperature steadily, but no more than 5%；When calcination temperature After degree increases to 380 DEG C, the increase of calcination temperature causes the large change of burn tinctuer, this illustrates that carbon fiber is opened after 380 DEG C There is autoxidation in beginning, and it is 380 DEG C to thereby determine that convenient calcination temperature.The calcination 30min meetings when calcination temperature is 380 DEG C Cause the great changes of burn tinctuer, this illustrates that carbon fiber surface is implicitly present in the impurity such as Protection glue；When calcination time continues to increase, The variation of burn tinctuer is little, stablizes 3.3% or so, therefore it is little to extend influence of the calcination time to improving the purity of carbon fiber. Finally determine that convenient calcination technological parameter is that calcination temperature is 380 DEG C and calcination time is 30min by testing.
Case study on implementation 3：
During using Electroless Cu Plating technique, the selection of agitating mode can also influence the quality of coating.In test in order to enable carbon is fine Dimension is evenly distributed, while coating of good performance is prepared, and has studied ultrasonic disperse, magnetic agitation and electric stirring etc. respectively 3 kinds of different agitating modes.Ultrasonic agitation power is used as 800W, time 30min.Carbon fiber disperses more in the plating solution It is even, plating solution lighter and carbon fiber surface has metallic luster after chemical plating.Carbon fiber surface uneven coating is even, and has Apparent peeling phenomenon, this may be because the influence of ultrasonic disperse is so that after just having plated coating on short carbon fiber surface again quickly It peels off, it is not easy to obtain the coating of dense uniform.Rotating speed is 800r/min when using magnetic agitation, time 30min.Carbon is fine Dimension has apparent agglomeration in the plating solution, is mainly gathered near magneton, plating solution color change is little, and carbon fiber surface does not have Metallic luster, it is seen that Cu is deposited near magneton and is not deposited on carbon fiber surface, it is difficult to obtain coating.Using electric stirring When rotating speed be 800r/min, time 30min.Carbon fiber disperses more uniformly in the plating solution, plating solution lighter and carbon fiber Also there is apparent metallic luster on surface.Carbon fiber surface coating is uniformly and fine and close, it is seen that this agitating mode is ideal Plating method.
Case study on implementation 4：
Carbon fiber has the characteristic peak of apparent Cu elements and without the characteristic peak of other metallic elements after plating, it follows that The Coating composition of the carbon fiber surface is Cu.Short carbon fiber is tightly combined with Cu matrixes, and short carbon fiber is distributed in Cu matrixes Uniformly, soilless sticking phenomenon.
Case study on implementation 5：
The density of short carbon fiber Cu based composites reduces with the increase of plating Cu short carbon fiber volume fractions.Actual density ratio Theoretical density is less than normal, is primarily due to the composite material during cold moudling and sintering and, there are some gaps, is in addition sintered When inner elastomeric stress release, there is certain volume expansion in composite material.The decline of density may cause sample multinomial performance Decline, therefore, improve technique it is extremely important to improve the density of composite material.Adding in plating Cu short carbon fibers makes composite material Hardness first improve and reduce afterwards, the hardness of composite material reaches maximum when plating Cu short carbon fiber volume fractions and reach 12.5%. This, which is primarily due to addition plating Cu short carbon fibers, improves composite material strength, while also reflects carbon fiber and combined with Cu matrixes Well；But when carbon fiber content reaches a certain critical value, occur reuniting now between carbon fiber and carbon fiber in composite material As the hardness of composite material can be caused to decline.Composite hardness prepared by plating Cu short carbon fibers, which is substantially better than, does not plate the short carbon of Cu Composite material prepared by fiber.The electrical conductivity of Cu base short carbon fiber materials is reduced with the increase of short carbon fiber content, This is primarily due to the electric conductivity of carbon fiber far below Cu, and the presence of carbon fiber, which is equivalent to, has isolated matrix, results in composite wood Expect the decline of electrical conductivity.The composite material of identical short carbon fiber content, the electrical conductivity of plating Cu short carbon fiber materials are higher than The composite material of Cu is not plated.

Claims (4)

1. a kind of plating Cu short carbon fiber reinforced Cu based composites, preparing raw material includes：The beautiful 13K in carbon fiber model east, monofilament A diameter of 7 μm, the short carbon fiber that carbon fiber is cut into 2mm long is spare；Plate the electrolysis Cu powder that Cu is more than 99.6% using purity, grain It spends for 200 mesh.
2. plating Cu short carbon fiber reinforced Cu based composites according to claim 1, it is characterized in that plating Cu short carbon fibers increase The preparation process of Cu based composites is by force：Before Electroless Cu Plating is carried out to short carbon fiber, it is necessary to carry out surface modification to it Processing；Mainly removing glue, roughening and hydrophily processing；Removing glue processing is carried out to carbon fiber primarily to removing carbon fiber surface Organic gel, furthermore, the roughness of carbon fiber surface can also be increased, to improve the wellability of carbon fiber in the plating solution；Roughening Technique can enhance the surface roughness of carbon fiber, and carbon fiber surface is made to provide facility in channel form for the deposition of Cu；It selects dense Nitric acid is roughened；Then, hydrophily processing is carried out to short carbon fiber with NaOH, and carbon fiber is cleaned repeatedly with deionized water, Until washing lotion is in neutrality；Select without be sensitized activation formaldehyde reduction system Electroless Cu Plating technique, the copper facing technology flow compared with To be simple, and efficiency is higher；Its plating solution is the CuSO of 15g/L4·5H2The Na of O, 30g/L2The CH of EDTA, 12mL/L2O, 0.1g/ (the C of L5H4N)2；
Plating test technology parameter：Bath temperature is 65 DEG C, is 13 by adding in NaOH solution to adjust pH value, ultrasound is respectively adopted Scattered, magnetic agitation and electric stirring mode uniformly disperse carbon fiber；The morphology of carbon fibers before and after plating Cu is observed using SEM, Coating analysis is done using XRD, so that it is determined that preferable copper facing technology；It is answered using the method compacting Cu base short carbon fibers of cold moudling Condensation material is pressed in experiment using powder compressing machine, under 200MPa pressure, pressurize 5min；By compression moulding Test block carries out vacuum-sintering, and carries out compacting sintering again to sintered test block, to improve consistency.
3. plating Cu short carbon fiber reinforced Cu based composites according to claim 1, it is characterized in that plating Cu short carbon fibers increase The detecting step of Cu based composites is by force：It is micro- hard using HXD-1000TMC using the density of drainage test compound material Degree meter measures the hardness of composite material, and the resistance of composite material is measured using SB2230 type DC digitals resistance meter.
4. plating Cu short carbon fiber reinforced Cu based composites according to claim 1, it is characterized in that carbon fiber It is to prepare high quality, the key point of high-purity plating Cu carbon fibers to learn Pre-treatment before plating；By carbon fiber calcination at 380 DEG C 30min can preferably remove the Protection glue of carbon fiber surface, and concentrated nitric acid is roughened the roughness that can improve carbon fiber surface；Carbon fiber There is catalytic effect on surface to Electroless Cu Plating, using formaldehyde reduction system without sensitization, activation etc. processes can be directly in fiber table Face carries out Electroless Cu Plating, simplifies technological process；When using electric stirring during chemical plating, it is heavy to be not likely to produce in plating solution Cu phenomenons, Cu layers of the plating of acquisition are more complete uniformly；The density and electrical conductivity of short carbon fiber Cu based composites are all as short carbon is fine It ties up the increase of volume fraction and reduces, and hardness is as the increase of short carbon fiber content is in first improving the trend that reduces afterwards, In plate Cu short carbon fibers content up to 12.5% when Cu based composites hardness reach maximum；Plate the short carbon fiber composite wood of Cu The performance of material is better than not plating the short carbon fiber material of Cu.
CN201611045308.3A 2016-11-24 2016-11-24 A kind of plating Cu short carbon fiber reinforced Cu based composites Pending CN108103422A (en)

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CN201611045308.3A CN108103422A (en) 2016-11-24 2016-11-24 A kind of plating Cu short carbon fiber reinforced Cu based composites

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109338341A (en) * 2018-10-29 2019-02-15 北京卫星制造厂有限公司 A kind of preparation method of carbon fiber enhancement resin base composite material surface gold plate
CN109695007A (en) * 2019-01-15 2019-04-30 中南大学 A kind of preparation method of metal-carbon composite
CN112375998A (en) * 2020-11-10 2021-02-19 西安工程大学 Preparation method of copper-based carbon fiber bearing bush

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109338341A (en) * 2018-10-29 2019-02-15 北京卫星制造厂有限公司 A kind of preparation method of carbon fiber enhancement resin base composite material surface gold plate
CN109338341B (en) * 2018-10-29 2020-08-14 北京卫星制造厂有限公司 Preparation method of carbon fiber reinforced resin matrix composite material surface gold coating
CN109695007A (en) * 2019-01-15 2019-04-30 中南大学 A kind of preparation method of metal-carbon composite
CN112375998A (en) * 2020-11-10 2021-02-19 西安工程大学 Preparation method of copper-based carbon fiber bearing bush
CN112375998B (en) * 2020-11-10 2022-03-04 西安工程大学 Preparation method of copper-based carbon fiber bearing bush

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