CN109400030A - High temperature resistant geo-polymer based composites and preparation method thereof for brake block - Google Patents
High temperature resistant geo-polymer based composites and preparation method thereof for brake block Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/006—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing mineral polymers, e.g. geopolymers of the Davidovits type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D66/00—Arrangements for monitoring working conditions, e.g. wear, temperature
- F16D66/02—Apparatus for indicating wear
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
- C04B2111/763—High temperatures
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention belongs to new material technology fields, and in particular to the high temperature resistant geo-polymer based composites and preparation method thereof for brake block.The invention discloses the high temperature resistant geo-polymer based composites for brake block, including geo-polymer raw material, alkali-activator, reinforcing fiber, frictional property regulator, antioxidant；Geo-polymer raw material is one of metakaolin, slag and flyash or a variety of, alkali-activator is the mixed liquor of sodium metasilicate and sodium hydroxide, reinforcing fiber is one of carbon fiber, carbon fiber felt and basalt fibre or a variety of, frictional property regulator is one of ink powder, molybdenum disulfide and silicon carbide or a variety of, and antioxidant is aluminium oxide.The framework material that it can be such that fiber forms can carry out space structure design, have preferable reinforcing effect；Alumina sol is coated on carbon felt filament surface and improves carbon fiber inoxidizability；The material of bright preparation has heat-resisting quantity, and coefficient of friction does not change with friction surface temperature.
Description
Technical field
The invention belongs to new material technology fields, and in particular to the high temperature resistant geo-polymer base composite wood for brake block
Material and preparation method thereof.
Background technique
Brake friction material according to matrix difference can be divided into resin base, powder metallurgy (Metal Substrate), C/C it is compound it is (carbon-based),
Several classes such as ceramic base；
Resin base brake block makees adhesive using resin, and the materials such as inorganic, organic and metallic fiber make reinforcing agent, with non-gold
Belong to powder as frictional property regulator, compression forming after mixing, preparation process is simple, and economical and practical, performance is able to satisfy one
As requirement.In order to radiate and enhance, generally addition steel fibre, copper fiber or carbon fiber etc., but metallic fiber and made of metal
Moving plate be also easy to produce in frictional heating weldering it is attached stick together, content conference aggravates the abrasion of brake disc；And carbon fiber is very fine
(only 7 μm) are handled through vacuum high-temperature, and surface inertness is big, be difficult in resin it is evenly dispersed, therefore frequently within 5mm be chopped
Carbon fiber, additive amount is generally within 3%.Wollastonite, aluminium oxide, feldspar, alumina etc., which is added, can be improved heat-resisting quantity, be added
Graphite, MoS2、BaSO4The heat-resisting quantity of brake block had both can be improved in equal solid lubricants, can also stablize coefficient of friction, reduced abrasion
Rate.Adhesive often uses phenolic resin, but in urgent and braking over long distances, the high temperature for the generation that rubs easily softens phenolic resin
It decomposes, oxidation, pyrolytic, granulating, explosion thawing, evaporation and distillation etc. one occurs at mating plate contact interface
Serial physical chemical change leads to brake block rapid wear, and the friction coefficient friction temperature, which increases, easily to be reduced, and braking quality is significant
Decline, it is desirable that friction surface temperature should not be greater than 250 DEG C.
Powder metallurgy brake flat (cermet) uses copper powder, iron powder etc. for matrix constituent element, graphite, MoS2、BaSO4、
FeSO4Deng for lubricant component, Al2O3、 SiO2、Cr2O3, SiC, the ceramic powders such as mullite be the production of friction component hot pressed sintering.
Advantage is: thermal conductivity is good, high temperature resistant, and coefficient of friction is high and to increase variation with friction temperature small, wears small, and the service life is long etc..Disadvantage
Be: manufacturing cost is high, and brake noise is big, oxidizable, easily sticks together with mating plate generation, and mating plate scratch and abrasion are big, and material is crisp
Big, the density height etc. of property.To improve intensity, it is commonly incorporated into the metals such as Ni, Cr, Sn, Al and forms solution strengthening, or with steel fibre, carbon fiber
Dimension, three-dimensional network SiC, three-dimensional network iron skeleton etc. strengthen matrix, or use Nano-meter SiO_22, SiC, Ni/ graphene enhances.It is often
Applied to special occasions such as aircraft, tank, high-speed rails.
C/C composite friction material is that occur with the high standards of aviation friction material.Carbon fiber has intensity
Greatly, the advantages that modulus is high, density is low, thermally conductive good, heat-resisting, rub resistance, the three-dimensional carbon felt (3D-CFF) being made into it, fiber are in
Three-dimensional netted distribution, compactness are higher.Originally it is prepared using vapor deposition and liquid deposition carbon, but in use, carbon exists
(450 DEG C of >) oxidizable decomposition under higher temperature, reduced service life, in addition coefficient of friction is relatively low.Therefore on this basis again
Carbon pottery brake disc (C/C-SiC composite brake sheet) is developed, using carbon felt as blank, has been infiltrated by vapour deposition process, precursor
Pyrolysismethod, liquid-phase silicone infusion process, warm compressed in-situ reacted process etc. introduce SiC and are made.It is low with density, and calorific intensity is high, and heat resistanceheat resistant declines
It moves back, wearability is good, and it is anti-oxidant, horizontal height can be carried, thermal capacity is high, and stable friction factor is moderate, the excellent frictional property such as corrosion-resistant
Can, but it prepares the high requirements on the equipment, and complex process, long preparation period are at high cost, technology larger to the damage of carbon fiber
It also owes perfect, is only limitted to apply on aircraft and some high-grade cars, sport car.
Ceramic base brake block is the hot spot of Recent study, mainly there is Si3N4、SiC、ZrO2、Al2O3Equal ceramics, but ceramics
Brittleness is big, frequently with chopped strand toughening, such as steel fibre, mullite fiber, basalt fibre, carbon fiber, potassium titanate crystal whisker
Deng being made of vacuum hotpressing high-sintering process.It is with low-density, high heat capacity, high temperature resistant, anti-oxidant, high abrasion
Superior functions, stable friction factor, but the flexural strengths such as property, long-life are low, at high cost, are also applied only to aircraft, on sport car.
To sum up, resin base brake block high temperature easily softens decomposition, though increase steel (or copper) fiber it is thermally conductive or brake disc increase
Heat dissipation is reinforced in radiating ribs and drilling, but often because poor heat radiation influences braking ability.Though other a few class high temperature resistants, heat resistanceheat resistant decline,
Preparation process is complicated, at high cost, it is difficult to which large-scale promotion uses.
Summary of the invention
Aiming at the problem that above-mentioned background technique is proposed, the purpose of the present invention is: it is intended to provide the resistance to height for brake block
Warm geo-polymer based composites and preparation method thereof.
To realize the above-mentioned technical purpose, The technical solution adopted by the invention is as follows:
For the high temperature resistant geo-polymer based composites of brake block, including geo-polymer raw material, alkali-activator, increasing
Strong fiber, frictional property regulator, antioxidant；
The geo-polymer raw material is one of metakaolin, slag and flyash or a variety of,
The alkali-activator is the mixed liquor of sodium metasilicate and sodium hydroxide,
The reinforcing fiber is one of carbon fiber, carbon fiber felt and basalt fibre or a variety of,
The frictional property regulator is one of ink powder, molybdenum disulfide and silicon carbide or a variety of,
The antioxidant is aluminium oxide.
The preparation method of high temperature resistant geo-polymer based composites for brake block, comprising the following steps:
S1: geo-polymer feedstock processing clays into power geo-polymer raw material, obtains geo-polymer raw material powder
End；
S2: alkali-activator is prepared, and powdered sodium hydroxide is put into sodium silicate solution, is mixed evenly, is obtained
To alkali-activator；
S3: the geo-polymer raw material powder that the S1 is obtained is put into S2 and obtained by the preparation of geo-polymer matrix
Alkali-activator in, and frictional property regulator is added, is uniformly mixed, it is spare to obtain geo-polymer matrix；
S4: reinforcing fiber is made up of needling technique with the three-dimensional netted of certain pore size for fiber skeleton preparation
The fiber skeleton of structure；
S5: fiber skeleton surface cladding coats one layer of antioxidant oxidation on the surface for the fiber skeleton that the S4 is obtained
Aluminium, the fiber skeleton after being coated；
S6: being mixed with dipping, and the fiber skeleton after cladding that geo-polymer matrix and S5 that the S3 is obtained are obtained is mixed
Dipping is closed, geo-polymer based composites precast body is obtained；
S7: by the geo-polymer based composites precast body be introduced into be heated to 30 DEG C~50 DEG C and 90% with
It is conserved under environment under upper humidity, obtains geo-polymer based composites.
As a preferred solution of the present invention, in the S2, the mass ratio of sodium hydroxide and sodium silicate solution is 14:86
~15:85.
As a preferred solution of the present invention, in the S3, the geo-polymer raw material powder and alkali-activator of investment
Mass ratio be 61:39~73:27.
As a preferred solution of the present invention, in the S3, the frictional property regulator and geo-polymer of investment are former
The mass ratio at feed powder end is 145:855~159:841.
As a preferred solution of the present invention, the alkali-activator modulus is between 1.2~1.5.
As a preferred solution of the present invention, fiber skeleton obtained in the S4 is three-dimensional structure, unidirectional diagonal stabbing knot
One of structure and two-way diagonal stabbing structure.
As a preferred solution of the present invention, in the S5, the cladding of aluminium oxide is using sol-gel method to fiber bone
Frame is coated.
Beneficial effects of the present invention
1, the framework material of fiber composition can carry out space structure design in the present invention, have preferable reinforcing effect；
2, alumina sol is coated on carbon felt filament surface and improves carbon fiber inoxidizability；
3, material of the present invention makees matrix with geo-polymer, adds frictional property regulator, and fiber is evenly distributed, and low temperature is supported
Hardened forming is protected, non-sintered carbon ceramic friction material is belonged to；
4, material prepared by the present invention has heat-resisting quantity, and coefficient of friction does not change with friction surface temperature；
5, the present invention will not generate pollution in preparation process, raw material can utilize steel mill, the slag of power plant emission, steel slag,
Flyash recycles waste product.
6, the present invention is not required to high temperature in preparation process, simple process, and generalization is strong.
Specific embodiment
In order to make those skilled in the art that the present invention may be better understood, below by embodiment to the technology of the present invention
Scheme further illustrates.
Embodiment one
The preparation method of high temperature resistant geo-polymer based composites for brake block, comprising the following steps:
S1: geo-polymer feedstock processing clays into power geo-polymer raw material, obtains geo-polymer raw material powder
End；
S2: alkali-activator is prepared, and powdered sodium hydroxide is put into sodium silicate solution, according to sodium hydroxide and silicon
The mass ratio of acid sodium solution is that 14:86 is matched, and is mixed evenly, obtains alkali-activator；
S3: the geo-polymer raw material powder that the S1 is obtained is put into S2 and obtained by the preparation of geo-polymer matrix
Alkali-activator in, be that 61:39 is matched according to the mass ratio of geo-polymer raw material powder and alkali-activator, and be added
Frictional property regulator, the mass ratio according to frictional property regulator and geo-polymer raw material powder are that 145:855 is matched
Than being uniformly mixed, it is spare obtaining geo-polymer matrix；
S4: reinforcing fiber is made up of needling technique with the three-dimensional netted of certain pore size for fiber skeleton preparation
The fiber skeleton of structure；
S5: fiber skeleton surface cladding coats one layer of antioxidant oxidation on the surface for the fiber skeleton that the S4 is obtained
Aluminium, the fiber skeleton after being coated；
S6: being mixed with dipping, and the fiber skeleton after cladding that geo-polymer matrix and S5 that the S3 is obtained are obtained is mixed
Dipping is closed, geo-polymer based composites precast body is obtained；
S7: by the geo-polymer based composites precast body be introduced into be heated to 30 DEG C~50 DEG C and 90% with
It is conserved under environment under upper humidity, obtains geo-polymer based composites one.
Embodiment two
The preparation method of high temperature resistant geo-polymer based composites for brake block, comprising the following steps:
S1: geo-polymer feedstock processing clays into power geo-polymer raw material, obtains geo-polymer raw material powder
End；
S2: alkali-activator is prepared, and powdered sodium hydroxide is put into sodium silicate solution, according to sodium hydroxide and silicon
The mass ratio of acid sodium solution is that 15:85 is matched, and is mixed evenly, obtains alkali-activator；
S3: the geo-polymer raw material powder that the S1 is obtained is put into S2 and obtained by the preparation of geo-polymer matrix
Alkali-activator in, be that 73:27 is matched according to the mass ratio of geo-polymer raw material powder and alkali-activator, and be added
Frictional property regulator, the mass ratio according to frictional property regulator and geo-polymer raw material powder are that 159:841 is matched
Than being uniformly mixed, it is spare obtaining geo-polymer matrix；
S4: reinforcing fiber is made up of needling technique with the three-dimensional netted of certain pore size for fiber skeleton preparation
The fiber skeleton of structure；
S5: fiber skeleton surface cladding coats one layer of antioxidant oxidation on the surface for the fiber skeleton that the S4 is obtained
Aluminium, the fiber skeleton after being coated；
S6: being mixed with dipping, and the fiber skeleton after cladding that geo-polymer matrix and S5 that the S3 is obtained are obtained is mixed
Dipping is closed, geo-polymer based composites precast body is obtained；
S7: by the geo-polymer based composites precast body be introduced into be heated to 30 DEG C~50 DEG C and 90% with
It is conserved under environment under upper humidity, obtains geo-polymer based composites two.
Embodiment three
The preparation method of high temperature resistant geo-polymer based composites for brake block, comprising the following steps:
S1: geo-polymer feedstock processing clays into power geo-polymer raw material, obtains geo-polymer raw material powder
End；
S2: alkali-activator is prepared, and powdered sodium hydroxide is put into sodium silicate solution, according to sodium hydroxide and silicon
The mass ratio of acid sodium solution is that 145:855 is matched, and is mixed evenly, obtains alkali-activator；
S3: the geo-polymer raw material powder that the S1 is obtained is put into S2 and obtained by the preparation of geo-polymer matrix
Alkali-activator in, be that 67:33 is matched according to the mass ratio of geo-polymer raw material powder and alkali-activator, and be added
Frictional property regulator, the mass ratio according to frictional property regulator and geo-polymer raw material powder are that 152:848 is matched
Than being uniformly mixed, it is spare obtaining geo-polymer matrix；
S4: reinforcing fiber is made up of needling technique with the three-dimensional netted of certain pore size for fiber skeleton preparation
The fiber skeleton of structure；
S5: fiber skeleton surface cladding coats one layer of antioxidant oxidation on the surface for the fiber skeleton that the S4 is obtained
Aluminium, the fiber skeleton after being coated；
S6: being mixed with dipping, and the fiber skeleton after cladding that geo-polymer matrix and S5 that the S3 is obtained are obtained is mixed
Dipping is closed, geo-polymer based composites precast body is obtained；
S7: by the geo-polymer based composites precast body be introduced into be heated to 30 DEG C~50 DEG C and 90% with
It is conserved under environment under upper humidity, obtains geo-polymer based composites three.
Example IV
The preparation method of high temperature resistant geo-polymer based composites for brake block, comprising the following steps:
S1: geo-polymer feedstock processing clays into power geo-polymer raw material, obtains geo-polymer raw material powder
End；
S2: alkali-activator is prepared, and powdered sodium hydroxide is put into sodium silicate solution, according to sodium hydroxide and silicon
The mass ratio of acid sodium solution is that 143:857 is matched, and is mixed evenly, obtains alkali-activator；
S3: the geo-polymer raw material powder that the S1 is obtained is put into S2 and obtained by the preparation of geo-polymer matrix
Alkali-activator in, be that 70:30 is matched according to the mass ratio of geo-polymer raw material powder and alkali-activator, and be added
Frictional property regulator, the mass ratio according to frictional property regulator and geo-polymer raw material powder are that 150:850 is matched
Than being uniformly mixed, it is spare obtaining geo-polymer matrix；
S4: reinforcing fiber is made up of needling technique with the three-dimensional netted of certain pore size for fiber skeleton preparation
The fiber skeleton of structure；
S5: fiber skeleton surface cladding coats one layer of antioxidant oxidation on the surface for the fiber skeleton that the S4 is obtained
Aluminium, the fiber skeleton after being coated；
S6: being mixed with dipping, and the fiber skeleton after cladding that geo-polymer matrix and S5 that the S3 is obtained are obtained is mixed
Dipping is closed, geo-polymer based composites precast body is obtained；
S7: by the geo-polymer based composites precast body be introduced into be heated to 30 DEG C~50 DEG C and 90% with
It is conserved under environment under upper humidity, obtains geo-polymer based composites four.
Embodiment five
The preparation method of high temperature resistant geo-polymer based composites for brake block, comprising the following steps:
S1: geo-polymer feedstock processing clays into power geo-polymer raw material, obtains geo-polymer raw material powder
End；
S2: alkali-activator is prepared, and powdered sodium hydroxide is put into sodium silicate solution, according to sodium hydroxide and silicon
The mass ratio of acid sodium solution is that 147:853 is matched, and is mixed evenly, obtains alkali-activator；
S3: the geo-polymer raw material powder that the S1 is obtained is put into S2 and obtained by the preparation of geo-polymer matrix
Alkali-activator in, be that 65:35 is matched according to the mass ratio of geo-polymer raw material powder and alkali-activator, and be added
Frictional property regulator, the mass ratio according to frictional property regulator and geo-polymer raw material powder are that 155:845 is matched
Than being uniformly mixed, it is spare obtaining geo-polymer matrix；
S4: reinforcing fiber is made up of needling technique with the three-dimensional netted of certain pore size for fiber skeleton preparation
The fiber skeleton of structure；
S5: fiber skeleton surface cladding coats one layer of antioxidant oxidation on the surface for the fiber skeleton that the S4 is obtained
Aluminium, the fiber skeleton after being coated；
S6: being mixed with dipping, and the fiber skeleton after cladding that geo-polymer matrix and S5 that the S3 is obtained are obtained is mixed
Dipping is closed, geo-polymer based composites precast body is obtained；
S7: by the geo-polymer based composites precast body be introduced into be heated to 30 DEG C~50 DEG C and 90% with
It is conserved under environment under upper humidity, obtains geo-polymer based composites five.
Embodiment six
The preparation method of high temperature resistant geo-polymer based composites for brake block, comprising the following steps:
S1: geo-polymer feedstock processing clays into power geo-polymer raw material, obtains geo-polymer raw material powder
End；
S2: alkali-activator is prepared, and powdered sodium hydroxide is put into sodium silicate solution, according to sodium hydroxide and silicon
The mass ratio of acid sodium solution is that 14:86 is matched, and is mixed evenly, obtains alkali-activator；
S3: the geo-polymer raw material powder that the S1 is obtained is put into S2 and obtained by the preparation of geo-polymer matrix
Alkali-activator in, be that 61:39 is matched according to the mass ratio of geo-polymer raw material powder and alkali-activator, and be added
Frictional property regulator, the mass ratio according to frictional property regulator and geo-polymer raw material powder are that 159:841 is matched
Than being uniformly mixed, it is spare obtaining geo-polymer matrix；
S4: reinforcing fiber is made up of needling technique with the three-dimensional netted of certain pore size for fiber skeleton preparation
The fiber skeleton of structure；
S5: fiber skeleton surface cladding coats one layer of antioxidant oxidation on the surface for the fiber skeleton that the S4 is obtained
Aluminium, the fiber skeleton after being coated；
S6: being mixed with dipping, and the fiber skeleton after cladding that geo-polymer matrix and S5 that the S3 is obtained are obtained is mixed
Dipping is closed, geo-polymer based composites precast body is obtained；
S7: by the geo-polymer based composites precast body be introduced into be heated to 30 DEG C~50 DEG C and 90% with
It is conserved under environment under upper humidity, obtains geo-polymer based composites six.
Embodiment seven
The preparation method of high temperature resistant geo-polymer based composites for brake block, comprising the following steps:
S1: geo-polymer feedstock processing clays into power geo-polymer raw material, obtains geo-polymer raw material powder
End；
S2: alkali-activator is prepared, and powdered sodium hydroxide is put into sodium silicate solution, according to sodium hydroxide and silicon
The mass ratio of acid sodium solution is that 15:85 is matched, and is mixed evenly, obtains alkali-activator；
S3: the geo-polymer raw material powder that the S1 is obtained is put into S2 and obtained by the preparation of geo-polymer matrix
Alkali-activator in, be that 73:27 is matched according to the mass ratio of geo-polymer raw material powder and alkali-activator, and be added
Frictional property regulator, the mass ratio according to frictional property regulator and geo-polymer raw material powder are that 145:855 is matched
Than being uniformly mixed, it is spare obtaining geo-polymer matrix；
S4: reinforcing fiber is made up of needling technique with the three-dimensional netted of certain pore size for fiber skeleton preparation
The fiber skeleton of structure；
S5: fiber skeleton surface cladding coats one layer of antioxidant oxidation on the surface for the fiber skeleton that the S4 is obtained
Aluminium, the fiber skeleton after being coated；
S6: being mixed with dipping, and the fiber skeleton after cladding that geo-polymer matrix and S5 that the S3 is obtained are obtained is mixed
Dipping is closed, geo-polymer based composites precast body is obtained；
S7: by the geo-polymer based composites precast body be introduced into be heated to 30 DEG C~50 DEG C and 90% with
It is conserved under environment under upper humidity, obtains geo-polymer based composites seven.
The geo-polymer based composites that embodiment one to embodiment seven is obtained, are prepared into brake block, are implemented
Then example one detects its performance, and compare with existing brake piece performance, as a result such as table 1 to the brake block of embodiment seven:
1 brake block performance test table of table
As can be seen from Table 1, the coefficient of thermal expansion of the brake block of composite material preparation of the present invention, room temperature compression strain and 400
The variation of compression strain is smaller at DEG C, and properties of product are stablized；
It tests to brake block coefficient of friction at various temperatures and wear rate, obtains table 2；
2 brake block frictional behaviour of table tests table
The unit of wear rate is 10 in table 2-7cm3/ Nm, from Table 2, it can be seen that brake block prepared by the present invention, rubs
Coefficient stabilization is wiped, more stable coefficient of friction is still able to maintain under conditions of high temperature；And wear rate is relatively low, therefore
It can preferably apply in brake block.
Above-described embodiment is merely exemplary to illustrate the principle of the present invention and its effect, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by all those of ordinary skill in the art
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (8)
1. being used for the high temperature resistant geo-polymer based composites of brake block, it is characterised in that: including geo-polymer raw material, alkali
Exciting agent, reinforcing fiber, frictional property regulator, antioxidant；
The geo-polymer raw material is one of metakaolin, slag and flyash or a variety of,
The alkali-activator is the mixed liquor of sodium metasilicate and sodium hydroxide,
The reinforcing fiber is one of carbon fiber, carbon fiber felt and basalt fibre or a variety of,
The frictional property regulator is one of ink powder, molybdenum disulfide and silicon carbide or a variety of,
The antioxidant is aluminium oxide.
2. the preparation method for the high temperature resistant geo-polymer based composites of brake block as described in claim 1, feature
It is: the following steps are included:
S1: geo-polymer feedstock processing clays into power geo-polymer raw material, obtains geo-polymer raw material powder；
S2: alkali-activator is prepared, and powdered sodium hydroxide is put into sodium silicate solution, is mixed evenly, alkali is obtained
Exciting agent；
S3: the geo-polymer raw material powder that the S1 is obtained is put into the alkali that S2 is obtained by the preparation of geo-polymer matrix
In exciting agent, and frictional property regulator is added, is uniformly mixed, it is spare to obtain geo-polymer matrix；
S4: the tridimensional network with certain pore size is made by needling technique in reinforcing fiber by fiber skeleton preparation
Fiber skeleton；
S5: fiber skeleton surface cladding coats one layer of antioxidant aluminium oxide on the surface for the fiber skeleton that the S4 is obtained, obtains
Fiber skeleton after to cladding；
S6: being mixed with dipping, and the fiber skeleton after cladding that the geo-polymer matrix that the S3 is obtained is obtained with S5 is mixed leaching
Stain obtains geo-polymer based composites precast body；
S7: by the geo-polymer based composites precast body be introduced into be heated to 30 DEG C~50 DEG C and 90% or more it is wet
It is conserved under environment under degree, obtains geo-polymer based composites.
3. the preparation method of the high temperature resistant geo-polymer based composites according to claim 2 for brake block,
Be characterized in that: in the S2, the mass ratio of sodium hydroxide and sodium silicate solution is 14:86~15:85.
4. the preparation method of the high temperature resistant geo-polymer based composites according to claim 2 for brake block,
Be characterized in that: in the S3, the geo-polymer raw material powder of investment and the mass ratio of alkali-activator are 61:39~73:27.
5. the preparation method of the high temperature resistant geo-polymer based composites according to claim 2 for brake block,
Be characterized in that: in the S3, the mass ratio of the frictional property regulator of investment and geo-polymer raw material powder be 145:855~
159:841。
6. the preparation method of the high temperature resistant geo-polymer based composites according to claim 2 for brake block,
Be characterized in that: the alkali-activator modulus is between 1.2~1.5.
7. the preparation method of the high temperature resistant geo-polymer based composites according to claim 2 for brake block,
Be characterized in that: fiber skeleton obtained in the S4 is three-dimensional structure, unidirectional diagonal stabbing one of structure and two-way diagonal stabbing structure.
8. the preparation method of the high temperature resistant geo-polymer based composites according to claim 2 for brake block,
Be characterized in that: in the S5, the cladding of aluminium oxide coats fiber skeleton using sol-gel method.
Priority Applications (1)
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| CN113122150A (en) * | 2020-01-10 | 2021-07-16 | 北京林业大学 | Preparation method of mineral fiber reinforced geopolymer-based wood adhesive |
| CN114981557A (en) * | 2020-01-20 | 2022-08-30 | 意大利Itt有限责任公司 | Method for manufacturing a friction material, in particular a brake pad and associated brake pad |
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| CN114981557A (en) * | 2020-01-20 | 2022-08-30 | 意大利Itt有限责任公司 | Method for manufacturing a friction material, in particular a brake pad and associated brake pad |
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