CN106966744A - A kind of fibre reinforced alumina ceramic composite material and preparation method thereof - Google Patents
A kind of fibre reinforced alumina ceramic composite material and preparation method thereof Download PDFInfo
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- CN106966744A CN106966744A CN201610391203.7A CN201610391203A CN106966744A CN 106966744 A CN106966744 A CN 106966744A CN 201610391203 A CN201610391203 A CN 201610391203A CN 106966744 A CN106966744 A CN 106966744A
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- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5053—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials non-oxide ceramics
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- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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- C04B2235/52—Constituents or additives characterised by their shapes
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- C04B2235/5216—Inorganic
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- C04B2235/616—Liquid infiltration of green bodies or pre-forms
Abstract
The present invention relates to a kind of fibre reinforced alumina ceramic composite material and preparation method thereof.Wherein, the preparation method comprises the following steps：S101：Using Alumina gel as precursor, vacuum impregnation is carried out to carbon felt, then densification will be carried out with the impregnated carbon felt of Alumina gel, to prepare the aluminium oxide ceramics of fibre reinforced；S102：Vacuum impregnation is carried out to the aluminium oxide ceramics of fibre reinforced using sol-gal process, then dries, sinters, and is cooled to room temperature, to prepare Si Al C coatings.According to a kind of preparation method of fibre reinforced alumina ceramic composite material of the present invention, its short preparation period and cost is low；According to a kind of fibre reinforced alumina ceramic composite material of the present invention, its mechanical property, resistance to elevated temperatures are excellent.
Description
Technical field
The present invention relates to Material Field, and in particular to a kind of fibre reinforced alumina ceramic composite material and its preparation side
Method.
Background technology
Aluminium oxide ceramics has the advantages that fusing point height, good stability at elevated temperature, modulus and intensity are higher, can be in high temperature
Used for a long time in oxidation environment.But bulk oxidation aluminium ceramics toughness is typically relatively low, easily occurs catastrophic failure, limits
Its application in engineering structure.To improve the mechanical property of aluminium oxide ceramics, various toughening mechanisms are widely used, main bag
Include the modes such as particle enhancing, whisker reinforcement and fiber reinforcement, wherein particle and crystal whisker toughened can significantly improve aluminium oxide ceramics
Intensity, but relatively low is improved to its toughness, and particle and crystal whisker toughened aluminum oxide ceramics use heat pressing process more, it is difficult to it is molded large-scale
Complexity is built.It is considered as that the promising improvement ceramics of comparison are tough to carry out toughening ceramic using the fiber of high-modulus, high intensity at present
The approach of property.According to composite theory, when Crack Extension is to fiber, energy is absorbed by the disengaging in fiber and matrix section
Amount, relaxes stress concentration, and few fibers will also consume a large amount of energy when generation fracture is extracted from matrix under tensile stress is acted on
Amount, these are all conducive to strengthening the toughness of ceramic material.
The preparation method of aluminium oxide ceramics has a variety of, and wherein sol-gel process is that the one kind for preparing aluminium oxide ceramics is commonly used
Method, it is, at room temperature through hydrolysis, polycondensation, to obtain colloidal sol and gel, then carried out heat by aluminium-alcohol salt or aluminium salt slightly higher
Cracking, obtains a kind of method of aluminium oxide ceramics.Outstanding feature of this method in terms of material preparation be：(1) due to gel mistake
Cheng Zhong, the size of particle is Nano grade, therefore can substantially reduce sintering temperature；(2) its chemistry can be made in one phase matrix
Composition reaches visibly homogeneous；(3) before cracking, by colloidal sol and gel two states, easily fiber and its braid are carried out
Dipping and excipient, thus be easy to prepare fibre reinforced composites.
The difference of alumina raw material is prepared according to sol-gal process, the preparation of alumina sol can be divided into organic salt original
Material method, inorganic salt raw material method, powder method.Organic salt method is, using aluminium isopropoxide as raw material, to possess stirring, backflow and charging function
Device in, Organic Ingredients is added dropwise in water, is stirred vigorously at 80 DEG C, most of alcohol is boiled off, then flows back again a few hours.Nothing
Machine salt method is to be dissolved in water by metal salt digestion in hydrochloric acid or aluminium chloride or by pure aluminum nitrate is analyzed, and solution is adjusted with ammoniacal liquor
PH.Powder method is to use SB powder (boehmite) or alumina powder, and colloidal sol is obtained by the way that powder is scattered.
Specific strength, specific modulus and the fatigue strength of carbon fiber are high, are a kind of good reinforcement materials, but carbon fiber exists
More than 400 DEG C are very easy to aoxidize, and cause the calamitous decline of material property.Silicon carbide fibre is also a kind of increasing well
Strong body material, its heat resistance and inoxidizability are superior to carbon fiber, but silicon carbide fibre is very expensive, and which has limited making for it
Use scope.Therefore there is important meaning to expanding it using scope solving to minimize cost on the basis of carbon fiber is oxidation resistant
Justice.
The content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.
Therefore, it is an object of the present invention to propose that a kind of mechanical property, resistance to elevated temperatures are excellent, and manufacturing cycle
A kind of preparation method of the low fibre reinforced alumina ceramic composite material of short, cost.
A kind of preparation method of fibre reinforced alumina ceramic composite material according to embodiments of the present invention, including it is as follows
Step：S101：Using Alumina gel as precursor, vacuum impregnation is carried out to carbon felt, then will be carried out with the impregnated carbon felt of Alumina gel
Densification, to prepare the aluminium oxide ceramics of fibre reinforced；S102：Oxidation using sol-gal process to fibre reinforced
Aluminium ceramics carry out vacuum impregnation, then dry, and sinter, and are cooled to room temperature, to prepare Si-Al-C coatings.
A kind of fibre reinforced alumina ceramic composite material according to embodiments of the present invention, carbon fiber is made pottery as aluminum oxide
The reinforcement of porcelain, its specific strength and specific modulus are high, and no creep, fatigue durability is good, and thermal coefficient of expansion is small, corrosion resistance, and oxygen
The section wellability for changing Alumina gel and carbon fiber is relatively good, and interface binding power is moderate.Carbon fiber ensure that increasing in the form of carbon felt
Strong phase is evenly distributed, it is to avoid the problem of particle enhancing and whisker reinforcement skewness.It is by vacuum impregnation technology that carbon is fine
Dimension enhancing alumina ceramic composite material carries out densification, considerably increases the mechanical strength of material.With powder sintering method
Prepare aluminium oxide ceramics to compare, preparing aluminium oxide ceramics using sol-gel process can drop to sintering temperature from 1800 DEG C
1300 DEG C, greatly reduce equipment requirement and energy resource consumption.The Si-Al-C antioxidant coatings that the present invention is used are very fine and close, with
Alumina substrate is well combined, can effective reinforcing material inoxidizability.
In addition, a kind of preparation side of fibre reinforced alumina ceramic composite material according to the above embodiment of the present invention
Method, can also have technical characteristic additional as follows：
Further, in step s 102, vacuum impregnation process is carried out using just to the aluminium oxide ceramics of fibre reinforced
Silester base silica sol, nitric acid aluminium base alumina sol and the mixed liquor of egg solution composition.
Further, in step s 102, the preparation of mixed liquor comprises the following steps：Take 30mL~40mL positive silicic acid second
With system in the water and alcohol mixeding liquid of ester, 15g~25g aluminum nitrate and a certain amount of hexamethylenetetramine addition 55mL~65mL
Standby tetraethyl orthosilicate base silica sol and nitric acid aluminium base alumina sol；To the tetraethyl orthosilicate base silica sol and nitre
100mL~130mL egg clear solution is added in sour aluminium base alumina sol.
Further, in step S101, densif iotacation processing step is specially：It will be dried with the impregnated carbon felt of Alumina gel
Afterwards, 1200 DEG C~1400 DEG C are warming up to according to 4 DEG C/min~6 DEG C/min heating rate, then vacuum-sintering 1h~3h cools down
To room temperature.
Further, in step S101, precursor be nitric acid Alumina gel, wherein, aluminum ions concentration be 3mol/L~
4mol/L, the viscosity of Alumina gel is 4mPaS~6mPaS.
Further, in step s 102, sintering temperature is 1200 DEG C~1400 DEG C.
Further, the preparation method of nitric acid Alumina gel comprises the following steps：Excessive aluminum nitrate is added to the water, to make
Standby aluminum nitrate solution；Aluminum nitrate solution is heated to 85 DEG C~90 DEG C, after aluminum nitrate is completely dissolved, 10%~15% is added
The pH value of ammoniacal liquor to liquid is 3.5~5.0, and then evaporating moisture makes aluminum ions concentration reach after 5mol/L~6mol/L, mistake
Filter, takes filtrate, that is, obtains aluminum nitrate colloidal sol.
Another object of the present invention is to propose a kind of fibre reinforced alumina ceramic composite material.
According to a kind of fibre reinforced alumina ceramic composite material of the present invention, including：Reinforcement, reinforcement is carbon
Felt；Matrix, matrix is submerged in the space of reinforcement by vacuum impregnation technology, and composite is prepared into reinforcement；Antioxygen
Change coating, antioxidant coating is Si-Al-C coatings, and antioxidant coating wraps up the composite.
Further, the density of fibre reinforced alumina ceramic composite material is more than or equal to 2.5g/cm3。
Further, carbon felt is PAN based carbon felt.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Brief description of the drawings
Fig. 1 is a kind of preparation method flow chart of fibre reinforced alumina ceramic composite material of the embodiment of the present invention.
Embodiment
Below with reference to the accompanying drawings a kind of preparation side of fibre reinforced alumina ceramic composite material of the present invention is described in detail
Method.
As shown in figure 1, a kind of preparation side of fibre reinforced alumina ceramic composite material according to embodiments of the present invention
Method, comprises the following steps：
S101：Using Alumina gel as precursor, vacuum impregnation is carried out to carbon felt, then will be entered with the impregnated carbon felt of Alumina gel
Row densification, to prepare the aluminium oxide ceramics of fibre reinforced.Specifically, it is right first using nitric acid Alumina gel as precursor
Carbon felt after ultrasonic cleaning carries out vacuum impregnation, then re-dry, dries and is put into vacuum-sintering in high temperature furnace after finishing, keeps
Vacuum cooled completes a densification process, then repeats the above steps 10~12 times, be until sample no longer increases weight to room temperature
Only, with obtained fibre reinforced alumina composite ceramic.Carbon fiber is used as the reinforcement of aluminium oxide ceramics, its specific strength and Bi Mo
Amount is high, and no creep, fatigue durability is good, and thermal coefficient of expansion is small, corrosion resistance, and the section infiltration of alumina sol and carbon fiber
Property is relatively good, and interface binding power is moderate.Carbon fiber ensure that enhancing phase is evenly distributed in the form of carbon felt, it is to avoid particle increasing
The problem of strong and whisker reinforcement skewness.
S102：Vacuum impregnation is carried out to the aluminium oxide ceramics of fibre reinforced using sol-gal process, then dries, burns
Knot, and room temperature is cooled to, to prepare Si-Al-C coatings.Specifically, a certain amount of egg is dissolved in a small amount of deionized water first
In, and stir to clarify liquid, i.e. liquid A；Produce a certain amount of tetraethyl orthosilicate base silica sol and nitric acid aluminium base aluminum oxide
The precursor mixed liquid B of colloidal sol, A is added dropwise in B, that is, obtains C, and is stirred, by the aluminium oxide ceramics of fibre reinforced
Vacuum impregnation in liquid C is placed in, is then dried；After drying, the aluminium oxide ceramics of dried fibre reinforced is placed in vacuum
Sintering furnace is sintered, after the completion of sintering, keeps vacuum to cool to room temperature with the furnace, and the fibre reinforced oxidation containing antioxidant coating is made
Aluminium ceramic composite.Compared with powder sintering method prepares aluminium oxide ceramics, preparing aluminium oxide ceramics using sol-gel process can
So that sintering temperature is dropped into 1300 DEG C from 1800 DEG C, equipment requirement and energy resource consumption are greatly reduced.The Si- that the present invention is used
Al-C antioxidant coatings are very fine and close, and being well combined for alumina substrate, can effective reinforcing material inoxidizability.
According to a kind of fibre reinforced alumina ceramic composite material of the present invention, including：Reinforcement, matrix and anti-oxidant
Coating.Wherein, reinforcement is carbon felt.Carbon fiber is as the reinforcement of aluminium oxide ceramics, and its specific strength and specific modulus be high, without compacted
Become, fatigue durability is good, and thermal coefficient of expansion is small, corrosion resistance, and the section wellability of alumina sol and carbon fiber is relatively good,
Interface binding power is moderate；Carbon fiber ensure that in the form of carbon felt enhancing phase is evenly distributed, it is to avoid particle enhancing and whisker
The problem of strengthening skewness.Matrix is submerged in the space of reinforcement by vacuum impregnation technology, is prepared into reinforcement
Composite.Compared with powder sintering method prepares aluminium oxide ceramics, preparing aluminium oxide ceramics using sol-gel process will can burn
Junction temperature drops to 1300 DEG C from 1800 DEG C, greatly reduces equipment requirement and energy resource consumption.Antioxidant coating applies for Si-Al-C
Layer, antioxidant coating wraps up the composite.Si-Al-C antioxidant coatings are very fine and close, and the combination of alumina substrate is good
It is good, can effective reinforcing material inoxidizability.
The present invention is described in detail with reference to specific embodiment.
Embodiment 1
Embodiment 1 is a kind of specific preparation process of fibre reinforced alumina ceramic composite material, and it is with aluminum oxide
As matrix, using PAN based carbon felt as reinforcement, there are Si-Al-C antioxidant coatings, including step in detail below in surface：
100g aluminum nitrates are taken, deionized water is added, heating water bath is simultaneously stirred, wherein bath temperature is set as 85 DEG C, continuation
Stirring in water bath 30min~40min so that aluminum nitrate is tried one's best hydrolysis.Then add in batches 12.5% ammoniacal liquor, until liquid
PH is 3.5~5, while further promotion hydrolysis, makes the property of colloidal sol stable, and adjust the size of micelle.Then evaporate
Liquid so that aluminum ions concentration is 6mol/L, viscosity is 6mPaS or so, and this concentration and viscosity are ensureing dipping effect
In the case of can as far as possible increase pickling efficiency.Then filter, translucent Alumina gel is made.
Once it is densified：Carbon felt (carbon felt physical dimension is about 4.5mm ╳ 5.5mm ╳ 82mm) after ultrasonic cleaning is placed in
Vacuum impregnation 2h in Alumina gel, dries 2h after dipping is complete under 50 DEG C of environment, colloidal sol is become gel, then become xerogel
And surface is not ftractureed.Dry and vacuum-sintering in high temperature furnace is put into after finishing, heating rate is 4 DEG C~6 DEG C, and predetermined temperature is
1300 DEG C, it is ensured that xerogel is changed into alpha-aluminium oxide.Reach and 2h is incubated after predetermined temperature so that sintering is complete.Then vacuum is kept
Room temperature is cooled to, a densification process is completed.
It is densified repeatedly：The step of to be once densified, as a cycle, is repeated 12 times, complete after 12 densification cycles
Into the densification process of composite, it is 2.8g/cm that density, which is made,3Fibre reinforced alumina ceramic composite material.
Prepare Si-Al-C antioxidant coatings：100mL egg is dissolved in a little deionized water, and stirred to clarify
Liquid, i.e. liquid A；40mL tetraethyl orthosilicate, 20g aluminum nitrates and 4g hexamethylenetetramines is taken slowly, equably to mix at room temperature
In the mixed liquor for dissolving in 60mL deionized waters and 10mL ethanol, and stir, tetraethyl orthosilicate base silica sol and nitric acid is made
The first body mixed liquor of aluminium base alumina sol, i.e. liquid B；Liquid in liquid A is added dropwise to liquid B and uniform stirring, liquid C is obtained；Will
Fibre reinforced alumina ceramic composite material is placed in liquid C and vacuum impregnation 1h is after 40 DEG C of drying；In lasting vacuumized conditions
Under, by dried fibre reinforced alumina ceramic composite material in 1400 DEG C, 30min is sintered, egg is rich in macromolecular
Protein, more than 700 DEG C can be carbonized that there is provided a large amount of activated carbon sources.Coating prepare reaction principle be：
2Si2O(s)+2Al2O3(s)+7C(s)→4SiAlC(s)+2CO(g)+CO2(g)
After the completion of sintering, close stove cooling and also keep being evacuated to room temperature, the fibre reinforced oxygen containing antioxidant coating is made
Change aluminium composite material.
Embodiment 2
Embodiment 2 is a kind of specific preparation process of fibre reinforced alumina ceramic composite material, and it is with aluminum oxide
As matrix, using PAN based carbon felt as reinforcement, there are Si-Al-C antioxidant coatings, including step in detail below in surface：
100g aluminum nitrates are taken, deionized water is added, heating water bath is simultaneously stirred, wherein bath temperature is set as 90 DEG C, continuation
Stirring in water bath 30min~40min so that aluminum nitrate is tried one's best hydrolysis.Then in batches add 15% ammoniacal liquor, until liquid PH
For 3.5~5, it is further promote hydrolysis while, make the property of colloidal sol stable, and adjust the size of micelle.Then liquid is evaporated
Body so that aluminum ions concentration is 5mol/L, viscosity is 6mPaS or so, and this concentration and viscosity are ensureing dipping effect
In the case of can as far as possible increase pickling efficiency.Then filter, translucent Alumina gel is made.
Once it is densified：Carbon felt (carbon felt physical dimension is about 4.5mm ╳ 5.5mm ╳ 82mm) after ultrasonic cleaning is placed in
Vacuum impregnation 2h in Alumina gel, dries 2h after dipping is complete under 50 DEG C of environment, colloidal sol is become gel, then become xerogel
And surface is not ftractureed.Dry and vacuum-sintering in high temperature furnace is put into after finishing, heating rate is 4~6 DEG C, and predetermined temperature is 1400
DEG C, it is ensured that xerogel is changed into alpha-aluminium oxide.Reach and 2h is incubated after predetermined temperature so that sintering is complete.Then vacuum cooled is kept
To room temperature, a densification process is completed.
It is densified repeatedly：The step of to be once densified, as a cycle, is repeated 12 times, complete after 12 densification cycles
Into the densification process of composite, it is 2.6g/cm that density, which is made,3Fibre reinforced alumina ceramic composite material.
Prepare Si-Al-C antioxidant coatings：100mL egg is dissolved in a little deionized water, and stirred to clarify
Liquid, i.e. liquid A；30mL tetraethyl orthosilicate, 18g aluminum nitrates and 4g hexamethylenetetramines is taken slowly, equably to mix at room temperature
In the mixed liquor for dissolving in 65mL deionized waters and 15mL ethanol, and stir, tetraethyl orthosilicate base silica sol and nitric acid is made
The first body mixed liquor of aluminium base alumina sol, i.e. liquid B；Liquid in liquid A is added dropwise to liquid B and uniform stirring, liquid C is obtained；Will
Fibre reinforced alumina ceramic composite material is placed in liquid C and vacuum impregnation 1h is after 35 DEG C of drying；In lasting vacuumized conditions
Under, by dried fibre reinforced alumina ceramic composite material in 1200 DEG C, 30min is sintered, egg is rich in macromolecular
Protein, more than 700 DEG C can be carbonized that there is provided a large amount of activated carbon sources.Coating prepare reaction principle be：
2Si2O(s)+2Al2O3(s)+7C(s)→4SiAlC(s)+2CO(g)+CO2(g)
After the completion of sintering, close stove cooling and also keep being evacuated to room temperature, the fibre reinforced oxygen containing antioxidant coating is made
Change aluminium composite material.
According to the present invention a kind of fibre reinforced alumina ceramic composite material, carbon fiber as aluminium oxide ceramics increasing
Qiang Ti, its specific strength and specific modulus are high, and no creep, fatigue durability is good, and thermal coefficient of expansion is small, corrosion resistance, and aluminum oxide is molten
The section wellability of glue and carbon fiber is relatively good, and interface binding power is moderate.Carbon fiber ensure that enhancing phase in the form of carbon felt
It is evenly distributed, it is to avoid the problem of particle enhancing and whisker reinforcement skewness.By vacuum impregnation technology by fibre reinforced
The density domination of alumina ceramic composite material is more than or equal to 2.5g/cm3, considerably increase the mechanical strength of material.With
Powder sintering method prepares aluminium oxide ceramics and compared, using sol-gel process prepare aluminium oxide ceramics can by sintering temperature from
1800 DEG C drop to 1300 DEG C, greatly reduce equipment requirement and energy resource consumption.The Si-Al-C antioxidant coatings that the present invention is used are non-
Chang Zhimi, and being well combined for alumina substrate, can effective reinforcing material inoxidizability.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means to combine specific features, structure, material or the spy that the embodiment or example are described
Point is contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.Moreover, specific features, structure, material or the feature of description can be with office
Combined in an appropriate manner in one or more embodiments or example.In addition, in the case of not conflicting, the skill of this area
Art personnel can be tied the not be the same as Example or the feature of example and non-be the same as Example or example described in this specification
Close and combine.
Although embodiments of the invention have been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, one of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, changed, replacing and modification.
Claims (10)
1. a kind of preparation method of fibre reinforced alumina ceramic composite material, it is characterised in that comprise the following steps：
S101：Using Alumina gel as precursor, vacuum impregnation is carried out to carbon felt, then will be caused with the impregnated carbon felt of Alumina gel
Densification process, to prepare the aluminium oxide ceramics of fibre reinforced；
S102：Vacuum impregnation is carried out to the aluminium oxide ceramics of fibre reinforced using sol-gal process, then dries, sinters, and
Room temperature is cooled to, to prepare Si-Al-C coatings.
2. a kind of preparation method of fibre reinforced alumina ceramic composite material according to claim 1, its feature exists
In in step s 102, the aluminium oxide ceramics progress vacuum impregnation process to fibre reinforced is aoxidized using tetraethyl orthosilicate base
The mixed liquor of Ludox, nitric acid aluminium base alumina sol and egg solution composition.
3. a kind of preparation method of fibre reinforced alumina ceramic composite material according to claim 2, its feature exists
In in step s 102, the preparation of the mixed liquor comprises the following steps：
Take 30mL~40mL tetraethyl orthosilicate, 15g~25g aluminum nitrate and a certain amount of hexamethylenetetramine add 55mL~
To prepare tetraethyl orthosilicate base silica sol and nitric acid aluminium base alumina sol in 65mL water and alcohol mixeding liquid；
100mL~130mL egg is added into the tetraethyl orthosilicate base silica sol and nitric acid aluminium base alumina sol
Clear solution.
4. a kind of preparation method of fibre reinforced alumina ceramic composite material according to claim 1, its feature exists
In in step S101, densif iotacation processing step is specially：After the impregnated carbon felt drying of the use Alumina gel, according to 4
DEG C/min~6 DEG C/min heating rate is warming up to 1200 DEG C~1400 DEG C, vacuum-sintering 1h~3h is subsequently cooled to room temperature.
5. a kind of preparation method of fibre reinforced alumina ceramic composite material according to claim 1 or 4, its feature
It is, in step S101, the precursor is nitric acid Alumina gel, wherein, aluminum ions concentration is 3mol/L~4mol/L, aluminium
The viscosity of colloidal sol is 4mPaS~6mPaS.
6. a kind of preparation method of fibre reinforced alumina ceramic composite material according to claim 1, its feature exists
In in step s 102, sintering temperature is 1200 DEG C~1400 DEG C.
7. a kind of preparation method of fibre reinforced alumina ceramic composite material according to claim 6, its feature exists
In the preparation method of the nitric acid Alumina gel comprises the following steps：
Excessive aluminum nitrate is added to the water, to prepare aluminum nitrate solution；
The aluminum nitrate solution is heated to 85 DEG C~90 DEG C, after aluminum nitrate is completely dissolved, 10%~15% ammoniacal liquor is added
PH value to liquid is 3.5~5.0, and then evaporating moisture makes aluminum ions concentration reach after 5mol/L~6mol/L, filters, takes
Filtrate, that is, obtain aluminum nitrate colloidal sol.
8. a kind of fibre reinforced alumina ceramic composite material, it is characterised in that including：
Reinforcement, the reinforcement is carbon felt；
Matrix, described matrix is submerged in by vacuum impregnation technology in the space of the reinforcement, is prepared into the reinforcement
Composite；
Antioxidant coating, the antioxidant coating is Si-Al-C coatings, and the antioxidant coating wraps up the composite.
9. a kind of fibre reinforced alumina ceramic composite material as claimed in claim 8, it is characterised in that the carbon fiber
The density for strengthening alumina ceramic composite material is more than or equal to 2.5g/cm3。
10. a kind of fibre reinforced alumina ceramic composite material as claimed in claim 8, it is characterised in that the carbon felt
For PAN based carbon felt.
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| CN108342897A (en) * | 2018-02-12 | 2018-07-31 | 匡邓吉 | A kind of carbon fiber surface aluminium oxide nano film and preparation method thereof |
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| CN113185313A (en) * | 2021-05-14 | 2021-07-30 | 山东工业陶瓷研究设计院有限公司 | Carbon fiber reinforced ceramic matrix composite and preparation method thereof |
| WO2023103209A1 (en) * | 2021-12-07 | 2023-06-15 | 天津爱思达新材料科技有限公司 | Preparation method for modified carbon fiber-toughened alumina self-healing ceramic |
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| CN113185313A (en) * | 2021-05-14 | 2021-07-30 | 山东工业陶瓷研究设计院有限公司 | Carbon fiber reinforced ceramic matrix composite and preparation method thereof |
| WO2023103209A1 (en) * | 2021-12-07 | 2023-06-15 | 天津爱思达新材料科技有限公司 | Preparation method for modified carbon fiber-toughened alumina self-healing ceramic |
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