CN104313518B - Ceramic composite material as well as preparation method and application thereof - Google Patents
Ceramic composite material as well as preparation method and application thereof Download PDFInfo
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Abstract
The invention relates to a ceramic composite material as well as a preparation method and an application thereof, belonging to the technical field of preparation of ceramic-based composite materials. The ceramic composite material comprises the following components in percentage by mass: 12-20% of carbon fibers, 0.01-0.1% of Ni, 20-45% of matrix carbon, 0.01-0.1% of SiC nano fibers, 25-40% of SiC matrix, 3-5% of Al4C3, 2-7% of Si and 2-10% of Al. The preparation method of the ceramic composite material comprises the following steps: by taking carbon fiber perform in the size of 0.10-0.65g/cm＜3＞ as a raw material, removing gum and plating nickel, and then depositing SiC nano fibers on the carbon fiber perform; then, preparing a C/C-SiC porous body by virtue of chemical vapor infiltration; and performing graphitization treatment on the C/C-SiC porous body, and then performing fused silica infiltration to obtain the ceramic composite material. The ceramic composite material disclosed by the invention is processed and then prepared into a ceramic-based brake plate. The brake plate has the advantages of excellent mechanical performance, excellent oxidization resistance, abrasion resistance, wear resistance and the like, and is suitable for a transpiration tool with high speed and high energy load.
Description
Technical field
The present invention relates to a kind of ceramic composite and its preparation method and application；Belong to ceramic matric composite preparing technical field.
Background technology
Disk brake is also known as disc brake, and it is had brake disc, wheel cylinder, caliper, oil pipe etc. by hydraulic control, main parts size.Disk brake rapid heat dissipation, lightweight, simple structure, easy to adjust.When vehicle is brought to a halt in high-speed travel state or the most repeatedly braked, the performance of brake is difficult to decline, so being more suitable for braking at a high speed.Particularly during high capacity, resistance to elevated temperatures is good, and braking effect is stable.The transport facilitys such as automobile, panzer and train are used widely.
Present stage overwhelming majority brake disc is with steel alloy manufacture and to be fixed on wheel, with vehicle wheel rotation.There is problems in that (1) wears no resistance in actual applications, abrasion is very fast；(2) radiating effect is the best, will cause braking strength because being heated and significantly sacrificing after repeatedly touching on the brake；(3) heavier-weight.
Ceramic base (carbon fibre reinforced ceramics matrix) friction material have light weight, frictional behaviour good, corrosion-resistant, not by advantages such as Changes in weather are affected, be the brake material of a kind of extensive application prospect.Ceramic base brake disc weight is lighter, meets the demand of brakes lighting, under extreme working position, braking response can be allowed sensitiveer, possesses more preferable high temperature fatigue resistance performance.Therefore, the probability that transient heat deformation and permanent thermal deformation event occur will substantially reduce.But, due in ceramic base brake disc ceramic matrix based on SiC (typically its weight/mass percentage composition is 20-60%), the relative hardness of SiC is only below diamond, it it is the emery wheel high-abrasive material of a kind of conventional polishing metal, therefore in braking procedure, SiC is prone to cutting abrasion self and brake(-holder) block so that friction pair is short for service life.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, it is provided that existing ceramic base brake disc material wears no resistance, service life is short, the problem of less stable for a kind of ceramic composite and its preparation method and application, effectively solution.
A kind of ceramic composite of the present invention, includes following composition by percentage to the quality:
Carbon fiber 12-20%；It is preferably 15-20%；More preferably 18-20%；
Matrix carbon 20-45%；It is preferably 30-36%；More preferably 32-34%；
Ni0.01-0.1%；It is preferably 0.04-0.1%；More preferably 0.05-0.08%；
SiC nanofiber 0.01-0.1%；It is preferably 0.04-0.01%；More preferably 0.06-0.08%；
SiC matrix 25-40%；It is preferably 28-37%；More preferably 32-35%；
Al4C33-5%；It is preferably 3.5-5%；More preferably 4-4.5%；
Si2-7%；It is preferably 2-5%；More preferably 3-5%；
Al2-10%；It is preferably 4-8%；More preferably 5-8%.
A kind of ceramic composite of the present invention, described nickel is evenly distributed on the surface of Carbon fibe；Described SiC nanofiber is evenly distributed between carbon fiber and matrix carbon；Described matrix carbon is coated on carbon fiber；Described SiC matrix, Al4C3, Si, Al are even is uniformly distributed point at matrix carbon surface.
The preparation method of a kind of ceramic composite of the present invention, comprises the steps:
Step one is removed photoresist, nickel plating
Under protective atmosphere, it is 0.10～0.65g/cm by density3Carbon fibe precast body carry out removing photoresist nickel plating at least 5min after process, surface must be arrived and be evenly distributed with the Carbon fibe precast body of nano nickel；
Step 2 chemical gaseous phase deposition preparation SiC nanofiber
Put in gaseous phase deposition stove after the surface of step one gained is evenly distributed with the Carbon fibe precast body cleaning, drying of nano nickel, it is continually fed into deposition gas, carrier gas and diluent gas, and to control stove internal gas pressure be 500～700Pa, carry out chemical gaseous phase at 800～1100 DEG C to deposit at least 4 hours, surface must be arrived and be evenly distributed with the Carbon fibe precast body of SiC nanofiber (SiCNF)；Described deposition gas is trichloromethyl silane；
Step 3 chemical vapor infiltration prepares C/C-SiCNF porous body
Surface step 2 prepared is evenly distributed with the Carbon fibe precast body of SiC nanofiber (SiCNF) and puts in cvd furnace, it is passed through carbon-source gas and diluent gas, and to control stove internal gas pressure be 950-1050pa, chemical vapor infiltration process is carried out, until obtaining density is 1.0～1.6g/cm at 900～1100 DEG C3C/C-SiCNF porous body；The carbon that this process is deposited, a part is as matrix carbon, when a part is as reaction fusion adhesion, carbon source needed for carbon pasc reaction；
Step 4 graphitization processing
Under protective atmosphere, it is 1.0～1.6g/cm at 2000～2400 DEG C to step 3 gained density3C/C-SiCNF porous body carry out high-temperature heat treatment more than 15 hours, obtain graphited C/C-SiCNF porous body；
Step 5 reaction fusion adhesion
Graphited C/C-SiCNF porous body is embedded in the infiltrant being made up of Si powder and Al powder, carries out reaction fusion adhesion at 1000～1500 DEG C, until obtaining density is 2.0～2.4g/cm3Ceramic matric composite；In described infiltrant, the weight/mass percentage composition of Si powder is 70～90%, and the weight/mass percentage composition of Al powder is 10～30%, and infiltrant used is 2～4:1 with the mass ratio of C/C-SiCNF porous body.
The preparation method of a kind of ceramic composite of the present invention, Carbon fibe precast body described in step one prepared by following method:
0 ° of laminated cloth of monolayer carbon fiber, Carbon fibe tire net, 90 ° of laminated cloth of Carbon fibe, Carbon fibe tire net are circulated superposition successively, and then using the laminated cloth for superposition of leukorrhagia Rubus delavayi Franch. and net tire carry out repeated puncture to make density is 0.10～0.65g/cm3Carbon fibe felt after, by design size cutting, obtain Carbon fibe precast body.
The preparation method of a kind of ceramic composite of the present invention, process of removing photoresist described in step one is:
Under protective atmosphere, precast body is processed 0.5～1.5 hour at 480～520 DEG C.
The preparation method of a kind of ceramic composite of the present invention, in step one；Described nickel plating is plating nickel plating, plating solution used by nickel plating be mass percentage concentration be the nickel sulfate solution of 10%～15%, during nickel plating, control electric current be 10～15A, the temperature of plating solution be 30～40 DEG C, the time be 5～30min；Use DC source as power supply used by nickel plating in actual mechanical process.
The preparation method of a kind of ceramic composite of the present invention, after nickel plating, must arrive surface and be evenly distributed with the Carbon fibe precast body of nano nickel；The particle diameter of described nano nickel is 0.01-0.5 μm.
The preparation method of a kind of ceramic composite of the present invention, in step 2, described carrier gas is hydrogen；At least one in nitrogen, hydrogen of described diluent gas；The deposition gas that is passed through, carrier gas, the mol ratio of diluent gas are 1:1～3:2～4.
The preparation method of a kind of ceramic composite of the present invention, in step 2, during chemical gaseous phase deposition preparation SiC nanofiber, controlling sedimentation time is 4～8 hours, cools to room temperature after having deposited with the furnace；Described SiC nanofiber is synusia heaped-up, a diameter of 20-100nm；A length of 5-20 μm.
The preparation method of a kind of ceramic composite of the present invention, in step 3, at least one in methane, propylene, propane, natural gas of described carbon-source gas, at least one in nitrogen, hydrogen of described diluent gas；Described carbon-source gas and diluent gas carbon-source gas in molar ratio: diluent gas=1 1～3 are passed through in cvd furnace.In actual mechanical process, general control sedimentation time is 150-240 hour.
The preparation method of a kind of ceramic composite of the present invention, in step 4, the time of graphitization processing is 15～30 hours.
The preparation method of a kind of ceramic composite of the present invention, in step 5, purity >=99.0% of described silica flour, granularity are 0.01～0.1mm, purity >=99.5% of aluminium powder, and granularity is 0.08～0.9mm.
The preparation method of a kind of ceramic composite of the present invention, in step 5, the time of reaction fusion adhesion is 0.2～1.0 hour.
The application of a kind of ceramic composite of the present invention, including for preparing ceramic base brake disc；Its operation is: assembles by after the dimensioned of design after obtaining ceramic matric composite, obtains ceramic base brake disc.
The application of a kind of ceramic base brake disc of the present invention, described by ceramic matric composite by design dimensioned be:
Use skive that by product size, ceramic matric composite is processed into one or more friction facing, every piece of friction facing thickness and rubbing surface precision reach product requirement, friction facing surrounding is by the negative common difference processing of product size, and processes the rivet counterbore being connected with steel skeleton on friction facing.
The application of a kind of ceramic base brake disc of the present invention, described assembling is: by design drawing, ceramic base friction plate and steel skeleton are carried out cold riveting.
The application of a kind of ceramic base brake disc of the present invention, described steel skeleton be with No. 45 steel for raw material by roughing, heat treatment, descaling, roughly grind and demagnetize, heat smoothing and eliminate stress, prepared by polish, riveter nail, the technique of electroplating surface copper, the thickness of copper coating is 10～20 μm.
Beneficial effect:
The ceramic base brake disc prepared with ceramic composite of the present invention, can improve transport facility brakes braking ability, alleviates brakes weight, extends the service life of brake disc and reduces maintenance cost.
The present invention utilizes the character of nickel cleverly, nano nickel has been obtained by strict state modulator, by the time of considered critical nickel plating, the concentration of plating solution and temperature and the magnitude of current, will be attached to the nano nickel on Carbon fibe precast body surface control one reasonably in the range of；Appropriate and appropriate size nano nickel uses as the catalyst preparing SiC nanofiber.
Due to the existence of nano nickel, under its catalytic action, it is achieved that carbon fiber surface growth in situ SiC nanofiber, by the strict preparation condition controlling SiC nanofiber, by the content of SiC nanofiber and size Control one reasonably in the range of；Appropriate and appropriate size SiC nanofiber can not only improve the interface bond strength of carbon fiber and carbon base body, improves mechanical strength, and is conducive to improving the crocking resistance of finished product.
When the present invention prepares C/C-SiCNF porous body by chemical vapor infiltration, the parameter that chemical vapor infiltration processes due to considered critical, in the range of making the rate controlled depositing carbon rational at one, the carbon part deposited is as matrix carbon, when a part is as reaction fusion adhesion, carbon source needed for carbon pasc reaction；In graphitizing process, needed for matrix carbon and carbon pasc reaction, carbon source is an entirety, this makes follow-up prepared SiC and matrix carbon combining tightly, this mechanical property not only contributing to improve finished product, also abrasion-resistant, the anti abrasive performance of finished product is increased significantly so that the brake disc prepared by the present invention can carry in transport facility with high speed high energy.
The present invention is directed to the problem that existing ceramic base brake disc wears no resistance, service life is short, use during infiltration, add a certain amount of aluminium powder, reduce the hardness of brake disc, improve wearability and the braking coefficient of stability.
In a word, the present invention, by rational composition proportion and sequence of construction, has prepared good mechanical performance, oxidation resistant, resistance to abrasion-resistant, anti abrasive high-quality ceramic base brake disc；Prepared finished product is completely suitable for high speed high energy and carries transport facility.
Accompanying drawing explanation
Accompanying drawing 1 is each component distribution situation figure of ceramic composite prepared by embodiment 1；
The schematic diagram of the brake disc that accompanying drawing 2 is made for utilizing ceramic composite prepared by the present invention.
In Fig. 1: 1-C/C-SiCNF；2-carbon fiber；3-is around the pyrolytic carbon of carbon fibre growth；4-silicon carbide substrate；5-elemental silicon；6-Al4C3And aluminum；
In Fig. 2: 7-ceramic base is combined composite；8-steel is carried on the back；9-rivet.
Detailed description of the invention
The invention will be further described with embodiment below in conjunction with the accompanying drawings.
Embodiment 1:
Design includes the ceramic matric composite of following composition by percentage to the quality:
Carbon fiber 20%；
Ni0.04%；
Matrix carbon 30%；
SiC nanofiber 0.06%；
SiC matrix 35%；
Al4C33.5%；
Si5%；
Al6.4%；
Using toray company (Toray) the T700 Carbon fibe net tire that produces and laminated cloth, making density is 0.55g/cm3Carbon fibe precast body.Being put into by precast body and use galvanoplastic to prepare Raney nickel after removing photoresist in vacuum drying oven, size of current is 12A, and electroplate liquid uses concentration to be the nickel sulfate solution of 10%, and the precast body deionized water after plating 8min cleans post-drying.CCVD is used to prepare SiC nanofiber at precast body carbon fiber surface, the flow-rate ratio of trichloromethyl silane, carrier gas hydrogen and dilution argon is 1:2:3, depositing temperature is 900 DEG C, deposition pressure is 500Pa, deposits 4 hours, must arrive surface and be evenly distributed with the Carbon fibe precast body of SiC nanofiber；The a length of 5-10 μm of described SiC nanofiber, a diameter of 20-60nm.Precast body carries out chemical vapor infiltration preparing density is 1.3g/cm3C/C-SiCNF porous materials, carbon-source gas is 13 with the ratio of diluent gas, and sedimentation time is 350 hours, and temperature is 1000 DEG C.C/C-SiCNF porous materials carrying out the graphitization processing of 2000 DEG C after 30 hours, become infiltrant, silica flour purity to be 99.2% percentage by weight 90% silica flour and 10% aluminium powder mixing match, granularity is 0.06mm, aluminium powder purity is 99.5%, and granularity is 0.5mm.The infiltrant of 2 times of C/C-SiC porous body weight is laid in infiltration device and carries out infiltration and prepare carbon ceramic friction material, until obtaining density is 2.28g/cm3Ceramic matric composite, during infiltration, control temperature and be 1400 DEG C, be incubated 1.0h at maximum temperature point.Carbon ceramic friction material is dimensioned to polylith friction facing by certain tank use for brake system V-type carbon pottery friction pair, use No. 45 steel processing Moving plates and the steel skeleton of quiet dish, prepared carbon pottery friction facing is carried out cold riveting with steel skeleton, prepares complete-disc carbon pottery friction pair.
To certain the tank use for brake system complete-disc V-type carbon pottery friction pair manufactured, carry out actual entrucking examination in Inner Mongolia First Machinery Group Co., Ltd..Use result shows: the complete-disc carbon pottery friction pair heat resisting temperature of exploitation has exceeded 1600 DEG C, there is good antioxygenic property and heat resistanceheat resistant decline performance, solve easy melting welding in powder metallurgy friction material brake process, tear, problem big, that the life-span is short of wearing and tearing, service life is more than 4 times of powder metallurgy brake flat.
Embodiment 2:
Design includes the ceramic matric composite of following composition by percentage to the quality:
Carbon fiber 18%；
Ni0.05%；
Matrix carbon 36%；
SiC nanofiber 0.05%；
SiC matrix 32%；
Al4C34.9%；
Si5%；
Al4%；
Using the domestic carbon fiber preforms that Hunan KBCarbon Composite Science and Technology Co., Ltd. produces, density is 0.50g/cm3.Galvanoplastic are used to prepare Raney nickel after being removed photoresist by precast body, size of current is 15A, electroplate liquid uses concentration to be the nickel sulfate solution of 15%, and the precast body deionized water after plating 10min (after plating, the granularity of gained nickel is 0.01-0.05 μm) cleans post-drying.CCVD is used to prepare SiC nanofiber at precast body carbon fiber surface, the flow-rate ratio of trichloromethyl silane, carrier gas hydrogen and dilution argon is 1:1:2, depositing temperature is 800 DEG C, deposition pressure is 700Pa, deposits 6 hours, must arrive surface and be evenly distributed with the Carbon fibe precast body of SiC nanofiber；The a length of 5-20 μm of described SiC nanofiber, a diameter of 20-50nm.Grown carbon fiber precast body carries out CVI preparing density is 1.24g/cm3C/C-SiCNF porous materials, carbon-source gas is 11 with the ratio of diluent gas, and sedimentation time is 300 hours, and temperature is 1100 DEG C.C/C-SiC porous materials carrying out the graphitization processing of 2400 DEG C after 15 hours, become infiltrant, silica flour purity to be 99.2% percentage by weight 70% silica flour and 30% aluminium powder mixing match, granularity is 0.06mm, aluminium powder purity is 99.5%, and granularity is 0.5mm.The infiltrant of 4 times of C/C-SiCNF porous body weight is laid in infiltration device and carries out infiltration until obtaining density is 2.36g/cm3Carbon ceramic friction material, during infiltration, control temperature and be 1200 DEG C, be incubated 0.5h at maximum temperature point.Carbon ceramic friction material is dimensioned to polylith friction facing by certain racing car use for brake system brake disc, use No. 45 steel processing steel skeletons, prepared carbon pottery friction facing is carried out cold riveting with steel skeleton, prepares carbon ceramic friction material brake disc, and success entrucking application.
Embodiment 3
Design includes the ceramic matric composite of following composition by percentage to the quality:
Carbon fiber 15%；
Ni0.08%；
Matrix carbon 40%；
SiC nanofiber 0.07%；
SiC matrix 28%；
Al4C34.85%；
Si7%；
Al5%；
Using the Carbon fibe precast body that Hunan KBCarbon Composite Science and Technology Co., Ltd. produces, making density is 0.32g/cm3Carbon fibe precast body.Precast body is put into and after vacuum drying oven removes photoresist, uses galvanoplastic to prepare Raney nickel, size of current is 15A, electroplate liquid uses concentration to be the nickel sulfate solution of 15%, and the precast body deionized water after plating 20min (after plating, the granularity of gained nickel is 0.04-0.2 μm) cleans post-drying.CCVD is used to prepare SiC nanofiber at precast body carbon fiber surface, the flow-rate ratio of trichloromethyl silane, carrier gas hydrogen and dilution argon is 1:3:2, depositing temperature is 1100 DEG C, deposition pressure is 600Pa, deposits 4 hours, must arrive surface and be evenly distributed with the Carbon fibe precast body of SiC nanofiber；The a length of 5-15 μm of described SiC nanofiber, a diameter of 40-100nm.Grown carbon fiber precast body carries out chemical vapor infiltration preparing density is 1.6g/cm3C/C-SiCNF porous materials, carbon-source gas is 11 with the ratio of diluent gas, and sedimentation time is 240 hours, and temperature is 1000 DEG C.C/C-SiC porous materials carrying out the graphitization processing of 2200 DEG C after 25 hours, become infiltrant, silica flour purity to be 99.6% percentage by weight 80% silica flour and 20% aluminium powder mixing match, granularity is 0.1mm, aluminium powder purity is 99.5%, and granularity is 0.05mm.The infiltrant of 3 times of C/C-SiC porous body weight is laid in infiltration device and carries out infiltration and prepare carbon ceramic friction material, until obtaining density is 2.08g/cm3Ceramic matric composite, during infiltration, control temperature and be 1500 DEG C, be incubated 0.2h at maximum temperature point.
Claims (9)
1. a ceramic composite, includes following composition by percentage to the quality:
Carbon fiber 12-20%；
Ni 0.01-0.1%；
Matrix carbon 20-45%；
SiC nanofiber 0.01-0.1%；
SiC matrix 25-40%；
Al4C33-5%；
Si 2-7%；
Al 2-10%；
Described nickel is evenly distributed on the surface of carbon fiber；Described SiC nanofiber is evenly distributed on
Between carbon fiber and matrix carbon；Described matrix carbon is coated on carbon fiber；Described SiC matrix,
Al4C3, Si, Al are even is uniformly distributed point at matrix carbon surface.
2. the method preparing ceramic composite as claimed in claim 1, its feature exists
In, comprise the steps:
Step one is removed photoresist, nickel plating
Under protective atmosphere, it is 0.10～0.65g/cm by density3Prefabricated carbon fiber body carry out
Remove photoresist nickel plating at least 5min after process, and must arriving surface, to be evenly distributed with the carbon fiber of nano nickel pre-
Body processed；
Step 2 chemical gaseous phase deposition preparation SiC nanofiber
The prefabricated carbon fiber body that the surface of step one gained is evenly distributed with nano nickel cleans baking
Put into after Gan in gaseous phase deposition stove, be continually fed into deposition gas, carrier gas and diluent gas, and control
Stove internal gas pressure processed is 500～700Pa, carries out chemical gaseous phase deposition at least 4 at 800～1100 DEG C
Hour, surface must be arrived and be evenly distributed with the prefabricated carbon fiber body of SiC nanofiber；Described deposition
Source of the gas is trichloromethyl silane；
Step 3 chemical vapor infiltration prepares C/C-SiCNF porous body
Surface step 2 prepared is evenly distributed with the prefabricated carbon fiber body of SiC nanofiber
Put in cvd furnace, be passed through carbon-source gas and diluent gas, and control stove internal gas pressure and be
950-1050Pa, carries out chemical vapor infiltration process at 900～1100 DEG C, until obtaining density
It is 1.0～1.6g/cm3C/C-SiCNF porous body；
Step 4 graphitization processing
Under protective atmosphere, 2000～2400 DEG C to step 3 gained density be 1.0～
1.6g/cm3C/C-SiCNF porous body carry out high-temperature heat treatment more than 15 hours, obtain stone
The C/C-SiCNF porous body of inkization；
Step 5 reaction fusion adhesion
Graphited C/C-SiCNF porous body is embedded in the infiltration being made up of Si powder and Al powder
In agent, carry out reaction fusion adhesion at 1000～1500 DEG C, until obtaining density is 2.0～2.4g/cm3
Ceramic matric composite；In described infiltrant, the weight/mass percentage composition of Si powder is 70～90%,
The weight/mass percentage composition of Al powder is 10～30%, infiltrant used and C/C-SiCNF porous body
Mass ratio is 2～4:1.
The preparation method of a kind of ceramic composite the most according to claim 2, it is special
Levy and be, in step one；Described nickel plating is plating nickel plating, and plating solution used by nickel plating is percent mass
Concentration is the nickel sulfate solution of 10%～15%, and during nickel plating, control electric current is 10～15A, plating
The temperature of liquid is 30～40 DEG C, the time is 5min-30min；After nickel plating, obtain surface uniform
The prefabricated carbon fiber body of nano nickel is distributed；The particle diameter of described nano nickel is 0.01-0.5 μm.
The preparation method of a kind of ceramic composite the most according to claim 2, it is special
Levying and be: in step 2, described carrier gas is hydrogen；Described diluent gas is selected from nitrogen, hydrogen
In at least one；The deposition gas that is passed through, carrier gas, the mol ratio of diluent gas be 1:1～
3:2～4.
The preparation method of a kind of ceramic composite the most according to claim 2, its feature
It is: in step 2, during chemical gaseous phase deposition preparation SiC nanofiber, controls sedimentation time
It is 4～8 hours, after having deposited, cools to room temperature with the furnace；Described SiC nanofiber straight
Footpath is 20-100nm；A length of 5-20 μm.
The preparation method of a kind of ceramic composite the most according to claim 2, it is special
Levying and be: in step 3, described carbon-source gas is in methane, propylene, propane, natural gas
At least one, at least one in nitrogen, the hydrogen of described diluent gas；Described carbon source
Gas and diluent gas carbon-source gas in molar ratio: diluent gas=1 1～3 are passed through cvd furnace
In.
The preparation method of a kind of ceramic composite the most according to claim 2, it is special
Levying and be: in step 5, purity >=99.0% of described silica flour, granularity are 0.01～0.1mm,
Purity >=99.5% of aluminium powder, granularity is 0.08～0.9mm.
The preparation method of a kind of ceramic composite the most according to claim 2, it is special
Levying and be: in step 5, the time of reaction fusion adhesion is 0.2～1.0 hour.
9. the application of a ceramic composite as claimed in claim 1, it is characterised in that:
Described application includes for preparing ceramic base brake disc.
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| CN105504806A (en) * | 2015-12-21 | 2016-04-20 | 无锡科莱欣机电制造有限公司 | Metal composite material used for freezing dryer |
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| CN110983208B (en) * | 2019-10-24 | 2021-08-31 | 中南大学 | C/C-SiC-Cu composite material and preparation method and application thereof |
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