CN106747545A - A kind of dispersion-strengtherning ceramic composite and preparation method thereof - Google Patents
A kind of dispersion-strengtherning ceramic composite and preparation method thereof Download PDFInfo
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- CN106747545A CN106747545A CN201611167239.3A CN201611167239A CN106747545A CN 106747545 A CN106747545 A CN 106747545A CN 201611167239 A CN201611167239 A CN 201611167239A CN 106747545 A CN106747545 A CN 106747545A
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- C04B35/71—Ceramic products containing macroscopic reinforcing agents
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Abstract
A kind of dispersion-strengtherning ceramic composite and preparation method thereof, belongs to composite and engineering ceramic material field；Composite is composited by the carborundum of different shape, calcium sulfate crystal whiskers, metallic fiber and composite adhesive, and the silicon-carbide particle of different shape, calcium sulfate crystal whiskers and metallic fiber and composite adhesive are interweaved distribution；Preparation method：1) by carborundum, calcium sulfate crystal whiskers, metallic fiber and composite adhesive, under vacuum, it is well mixed, slurry is obtained；2) by slurry, under vacuo, in vibrating casting to mould；3) by mould and cast slurry, solidified, dispersion-strengtherning ceramic composite is obtained；Abrasion and etching problem of the of the invention solid-liquid medium effectively solved compared with highly corrosive in conveying to pump housing material, the composite of preparation, with metallic matrix adhesive force it is strong, hardness is high, wear-resisting, corrosion-resistant, anti-oxidant and heat shock resistance is good the features such as；It is applied to the fields such as chemical industry, pharmacy and papermaking.
Description
Technical field
The invention belongs to composite and engineering ceramic material field, a kind of more particularly to dispersion-strengtherning Ceramic Composite material
Material and preparation method thereof.
Background technology
The key equipment that centrifugal pump is conveyed as fluid, its material mainly has cast steel, stainless steel, metal liner rubber and metal
Lining ceramics, although wear-resisting two phase stainless steel is good because of its strength of materials high-ductility, but there is corrosivity solid-liquid in long-time conveying
Corrosion resistance and anti-wear performance during medium because of material is poor, causes conveying equipment for fluid substances to be lost larger, not only improves production cost,
And it is also easy to produce potential safety hazard.To solve this problem, frequently with lining rubber or the method for lining ceramics, but by rubber and ceramic material
The shortcomings of service life, easy to fall off and easy plug nozzle, influences, it would be highly desirable to which exploitation has the property such as strong wear-resistant, anticorrosive and high temperature resistant
The metal-based compound new material of energy and its related technology of preparing.
With the continuous extension of ceramic functional material application field, the development of material preparation technology, ceramic material are promoted
Fragility and also significantly improved with the energy of attachment of metal, make its some special industry fields highlight brilliance development potentiality,
This brings opportunity for the selection of corrosive fluid key equipment of the conveying with solid particle.In consideration of it, this patent is developed
A kind of technology of preparing for being suitable for centrifugal pump ceramic composite under harsh ambient condition, i.e., a kind of high-performance metal surface is former
New method prepared by position control dispersion-strengtherning ceramic composite.The ceramic on metal pump prepared using the art of this patent uses compound
Material can process the corrosivity solid-liquid fluid of chloride, wherein chloride ion content≤15%, and solid phase contains in corrosive fluid
Amount≤20%, temperature≤260 DEG C；Additionally, using the art of this patent prepare composite have hardness it is high, wear-resisting, corrosion-resistant,
The characteristics of anti-oxidant and heat endurance is good, can be widely applied to the fields such as chemical industry, the energy and pharmacy, and this makes pottery for China's Metal Substrate
The raising of porcelain composite technology of preparing has important practical significance.
The content of the invention
In view of the shortcomings of the prior art, the invention provides a kind of dispersion-strengtherning ceramic composite and preparation method thereof,
The composite is mixed by carborundum, calcium sulfate crystal whiskers, metallic fiber and compound binding agent by vacuum, vacuum vibration is poured into
The process such as type and low-temperature setting is prepared from, and is a kind of high-performance metal surface in situ control dispersion-strengtherning ceramic composite system
It is standby and preparation method thereof.
Dispersion-strengtherning ceramic composite of the invention, by carborundum, calcium sulfate crystal whiskers, metallic fiber and composite adhesive
It is composited, in described ceramic composite, the silicon-carbide particle of different shape, calcium sulfate crystal whiskers and metallic fiber and compound
Adhesive is interweaved distribution；Wherein：
Carborundum is by 1~3mm polyhedrons silicon-carbide particle, 500~400 μm of polyhedron silicon-carbide particles, 10~30 μm of balls
Shape carborundum and 90~100nm ball shaped nanos carborundum are constituted；Calcium sulfate crystal whiskers, its a diameter of 0.5~1.5 μm, draw ratio is
90~110；Metallic fiber, its a diameter of 7~10 μm, length is 0.8~2.4mm；Compound binding agent, by epoxy resin and star-like
Block copolymer is constituted, and the weight/mass percentage composition of epoxy resin is 75~99%, star block copolymer 1~25%；
In mass ratio, 1~3mm polyhedrons silicon-carbide particle: 400~500 μm of polyhedron silicon-carbide particles: 10~30 μm of balls
Shape carborundum: 90~100nm ball shaped nano carborundum: calcium sulfate crystal whiskers: metallic fiber: compound binding agent=(5~30): (5~
30): (5~20): (1~5): (1~10): (0.5~5): (15~30).
Described star block copolymer is by the preparation of ethenylidene polyamines, polymeric acrylic acid block and polypropylene/olefin block
Into；During preparation, the weight/mass percentage composition of three is respectively：Ethenylidene polyamines be 1~5%, polymeric acrylic acid block be 20~
80%, polypropylene/olefin block is 15~79%；Ethenylidene polyamines is used as initiator.
The molecular weight of described ethenylidene polyamines is 100~300, the molecular weight of polymeric acrylic acid block for 1000~
5000, the molecular weight of polypropylene/olefin block is 1000~5000, and the molecular weight of star block copolymer is 3450~3550.
Described ceramic composite, metallic fiber is titanium fiber.
Pore volume percentage≤0.01% in described ceramic composite.
Described ceramic composite, its thermal coefficient of expansion is 13.0 × 10-6~14.0 × 10-6/k-1, rupture strength can
To reach 92~100MPa, 176~188MPa of compression strength, fracture elongation is 0.1~0.2%.
Described ceramic composite, its proportion≤2.6.
Described ceramic composite, metal material in connection is stainless steel, cast steel or spheroidal graphite cast-iron；With reference to after with
Metal is the continuous phase of matrix, and the silicon-carbide particle of different shape, calcium sulfate crystal whiskers and metallic fiber are answering for the second phase composition
Condensation material, silicon-carbide particle, calcium sulfate crystal whiskers and metallic fiber are interweaved disperse in metal surface.
Described ceramic composite, temperature in use≤260 DEG C after being combined with metallic matrix.
The preparation method of dispersion-strengtherning ceramic composite of the invention, comprises the following steps：
Step 1, vacuum mixing：
By carborundum, calcium sulfate crystal whiskers, metallic fiber and composite adhesive, under vacuum, it is well mixed, slurry is obtained
Material；Wherein：
Carborundum is by 1~3mm polyhedrons silicon-carbide particle, 500~400 μm of polyhedron silicon-carbide particles, 10~30 μm of balls
Shape carborundum and 90~100nm ball shaped nanos carborundum are constituted；
Calcium sulfate crystal whiskers, its a diameter of 0.5~1.5 μm, draw ratio is 90~110；
Metallic fiber, its a diameter of 7~10 μm, length is 0.8~2.4mm；
Compound binding agent, is made up of epoxy resin and star block copolymer, and the weight/mass percentage composition of epoxy resin is 75
~99%, star block copolymer 1~25%；
By weight/mass percentage composition, carborundum weight/mass percentage composition+calcium sulfate crystal whiskers weight/mass percentage composition+metallic fiber quality
Percentage composition+composite adhesive weight/mass percentage composition=100%；1~3mm polyhedron silicon-carbide particles：5~30%, 400~
500 μm of polyhedron silicon-carbide particles：5~30%, 10~30 μm of spherical carbide silicon：5~20%, 90~100nm ball shaped nano carbon
SiClx 1~5%；Calcium sulfate crystal whiskers：1~10%；Metallic fiber：0.5~5%, compound binding agent：15~30%；
Step 2, vacuum vibration moulding by casting：
By slurry, under vacuo, in vibrating casting to mould；
Step 3, curing molding：
By mould and cast slurry, 60~160 DEG C are heated to, are solidified, hardening time is 6~12h, disperse is obtained strong
Change ceramic composite.
In the preparation method of above-mentioned dispersion-strengtherning ceramic composite：
In the step 1, polyhedron silicon-carbide particle is the silicon-carbide particle with corner angle.
In the step 1, draw ratio refers to the ratio of the length with its diameter of calcium sulfate crystal whiskers.
In the step 1,1~3mm polyhedron silicon-carbide particles refer to polyhedron silicon-carbide particle average diameter for 1~
The polyhedron silicon-carbide particle of 3mm；500~400 μm of polyhedron silicon-carbide particles, refer to polyhedron silicon-carbide particle average diameter
It is 500~400 μm of polyhedron silicon-carbide particle；10~30 μm of spherical carbide silicon, refer to ball that average diameter is 10~30 μm
Shape carborundum；90~100nm spherical carbide silicon, refers to spherical carbide silicon that average diameter is 90~100nm；Using grain size analysis
The result of instrument test.
In the step 1, metallic fiber is titanium fiber.
In the step 1, metallic fiber carries passivating film.
In the step 1, star block copolymer is by ethenylidene polyamines, polymeric acrylic acid block and polypropylene/olefin block
It is prepared from；During preparation, the weight/mass percentage composition of three is respectively：Ethenylidene polyamines is 1~5%, polymeric acrylic acid block
It is 20~80%, polypropylene/olefin block is 15~79%；Ethenylidene polyamines is used as initiator.
The molecular weight of described ethenylidene polyamines is 100~300, the molecular weight of polymeric acrylic acid block for 1000~
5000, the molecular weight of polypropylene/olefin block is 1000~5000, and the molecular weight of star block copolymer is 3450~3550.
In the step l, 20~200Pa of vacuum.
In the step 1, material is well mixed using stirring, agitation revolution is 20~100r/min, and incorporation time is
10~120min,
The step 1, each material is placed in mixing reactor, under vacuum, is stirred mixing.
In the step 2, vacuum is 60~180Pa.
In the step 2, slurry is the slurry after degassing.
In the step 2, the cavity body of mould of cast is constituted by wanting metallic matrix in connection and inner core or housing.
In the step 2, vibration frequency is 10~50Hz.
Dispersion-strengtherning ceramic composite of the present invention and preparation method thereof, the general principle of main process is as follows：
Using the own high rigidity of thyrite, high-wearing feature, high corrosion-resistant, grinding capacity high, heat-resisting quantity, anti-
The excellent properties such as thermal shock resistance, and by calcium sulfate crystal whiskers and ultrafine metal fibers obdurability are high, stability and good thermal shock etc.
Feature carries out the strengthening and toughening of composite ceramic material, and work is reacted by vacuum mixing, vacuum vibration moulding by casting and low-temperature setting
Skill, the in-situ control of ceramic composite is carried out in metal surface, and using superfine powdery material, inorganic crystal whisker and superfine metal
Fibrous material characteristic, realizes dispersion-strengthened action in metal matrix ceramic composites, to improve single types of silicon carbide-based ceramics material
The problem that material comprehensive mechanical property is not enough, this patent is intended to obtain a kind of with hardness is high, elastic modelling quantity is big and coefficient of friction is small
Engineering ceramics new material, and the material will also have temperature in use higher, high abrasion resistance, high corrosion resistance energy,
Bending strength higher and fracture toughness energy, and the performance indications such as self-lubricating property.
The present invention matches somebody with somebody with materials such as the carborundum of different-grain diameter and form, calcium sulfate crystal whiskers and metallic fibers as additive
With composite adhesive, by suitable process system, dispersion-strengtherning ceramic composite is prepared, after cast and solidification, with gold
The metal-base composites that category matrix is formed after combining, it, with metal as matrix, is with metal in its surface recombination ceramic material to be
It is the continuous phase of matrix, and the silicon-carbide particle of different shape, calcium sulfate crystal whiskers and metal ultra-fine fiber are the second phase composition
Composite；Using vacuum mixing and vacuum vibration pouring type in preparation process, second phase particles are not only realized multiple
Dispersion-strengthened action in condensation material, but also the pore-free control of composite inner can be realized, so that its thermal conductivity
Can, anti-wear performance and comprehensive mechanical property significantly improve, not only lateral shear intensity is high, and toughness, fatigue resistance and strong
The mechanical properties such as plasticity are good, while also having the advantages that heat conduction, wear-resisting, thermal shock resistance and corrosion-resistant.Can be normal at 260 DEG C
Use, the proportion of this metal-base composites is only the 1/3 of ferrous materials, be the 2/3 of titanium alloy, it is close with aluminium alloy, but
Its wearability and corrosion resistance is 8 times of stainless steel, and combined strength bination is 3 times of common silicon-carbide metal based composites；From
And make this metal matrix ceramic composites have high rigidity and high-wearing feature, resistant to chemical etching, anti-oxidant, thermal coefficient of expansion with
The excellent performance such as metal is close, while, it is easy to low temperature moulding treatment, and it is strong with metallic matrix adhesive force, the porosity is extremely low.
Dispersion-strengtherning ceramic composite of the invention and preparation method thereof, compared with prior art, has the beneficial effect that：
The present invention can effectively solve the problem that the abrasion and corrosion of solid-liquid medium compared with highly corrosive in conveying to pump housing material
Problem, only the preparation of metal matrix ceramic composites does not provide a kind of new method, and is highly corrosive solid-liquid fluid
Conveying equipment provides a kind of new material of excellent performance.The composite prepared using the art of this patent is had and metallic matrix
The features such as adhesive force is strong, hardness is high, wear-resisting, corrosion-resistant, anti-oxidant and heat shock resistance is good, can be widely applied to chemical industry, pharmacy and
The fields such as papermaking, the ceramic on metal pump prepared using the ceramic material not only can notable extension device service life, may be used also
To reduce production cost, maintenance cost is reduced, improve production security and reliability in fluid delivery process；This is for improving
The key equipment exploitation and material preparation technology of China's high corrosion-resistant and the conveying of high temperature solid-liquid fluid-mixing have important reality
Meaning.
Brief description of the drawings
The process chart of the preparation method of the dispersion-strengtherning ceramic composite of Fig. 1 embodiment of the present invention 1~4.
Specific embodiment
The process chart of the preparation method of the dispersion-strengtherning ceramic composite of the embodiment 1~4 of following examples is such as
Shown in Fig. 1.
Embodiment 1
A kind of dispersion-strengtherning ceramic composite, the Titanium by carborundum, calcium sulfate crystal whiskers, surface with passivating film is fine
Peacekeeping composite adhesive is composited, in described ceramic composite, the silicon-carbide particle of different shape, calcium sulfate crystal whiskers and
Titanium fiber and composite adhesive are interweaved distribution；Wherein：
In mass ratio, 1.5mm ± 0.5mm polyhedrons silicon-carbide particle: 450 μm of ± 50 μm of polyhedron silicon-carbide particles: 15 μ
M ± 5 μm spherical carbide silicon: 100nm ball shaped nano carborundum: draw ratio is the calcium sulfate crystal whiskers of 100 and a diameter of 1 μm: diameter 8
μm and length 1mm surfaces with passivating film Titanium fiber: compound binding agent=30: 5: 20: 5: 10: 5: 15；
Described compound binding agent is constituted by by epoxy resin and star block copolymer, in mass ratio, epoxy resin: star
Type block copolymer=99: 1；The star block copolymer is 1000 by ethenylidene polyamines that molecular weight is 300, molecular weight
Polymeric acrylic acid block and molecular weight are prepared from for 5000 polypropylene/olefin blocks；The molecular weight of star block copolymer is
3450；During preparation, the weight/mass percentage composition of three is respectively：Ethenylidene polyamines is 1%, and polymeric acrylic acid block is 20%,
Polypropylene/olefin block is 79%；Ethenylidene polyamines is used as initiator.
The preparation method of above-mentioned dispersion-strengtherning ceramic composite, comprises the following steps：Described
Step 1, vacuum mixing：
By the composition proportion in above-mentioned dispersion-strengtherning ceramic composite, by the silicon-carbide particle of different shape, calcium sulfate
Whisker, Titanium fiber and composite adhesive are placed in mixing reactor, and under the conditions of vacuum is 200Pa, stirring mixing is equal
Even, agitation revolution is 20r/min, and incorporation time is 120min, and slurry is obtained；
Step 2, vacuum vibration moulding by casting：
By slurry, under the conditions of vacuum is 180Pa, in vibrating casting to mould；Wherein, vibration frequency is 20Hz, is poured
The cavity body of mould of note is constituted by wanting metallic matrix stainless steel in connection and housing；
Step 3, curing molding：
By mould and cast slurry, 60 DEG C are heated to, are solidified, hardening time is 12h, dispersion-strengtherning ceramics is obtained multiple
Condensation material.
Dispersion-strengtherning ceramic composite manufactured in the present embodiment, the pore volume percentage in described ceramic composite
Than≤0.01%.
Ceramic composite manufactured in the present embodiment, metal material in connection is stainless steel；It is with metal with reference to after
The continuous phase of matrix, the silicon-carbide particle of different shape, calcium sulfate crystal whiskers and the composite wood that Titanium fiber is the second phase composition
Material, silicon-carbide particle, calcium sulfate crystal whiskers and Titanium fiber are interweaved disperse in metal surface.
The heat resistance of the metal matrix ceramic composites that the present embodiment is prepared can reach 200 DEG C, wearability with it is general
Logical wear-resisting alloy steel is 14.0 × 10 compared to 6 times of raising, thermal coefficient of expansion-6/k-1, rupture strength can reach 100MPa, resistance to compression
Intensity 188MPa, fracture elongation can reach 0.2%.
Embodiment 2
A kind of dispersion-strengtherning ceramic composite, the Titanium by carborundum, calcium sulfate crystal whiskers, surface with passivating film is fine
Peacekeeping composite adhesive is composited, in described ceramic composite, the silicon-carbide particle of different shape, calcium sulfate crystal whiskers and
Titanium fiber and composite adhesive are interweaved distribution；Wherein：
In mass ratio, 2.5mm ± 0.5mm polyhedrons silicon-carbide particle: 450 μm of ± 50 μm of polyhedron silicon-carbide particles: 15 μ
M ± 5 μm spherical carbide silicon: 90nm ball shaped nano carborundum: draw ratio is the calcium sulfate crystal whiskers of 90 and a diameter of 1.5 μm: diameter
10 μm of Titanium fibers with length 1.2mm surfaces with passivating film: compound binding agent=5: 30: 20: 1: 5: 5: 30；
Described compound binding agent is constituted by by epoxy resin and star block copolymer, in mass ratio, epoxy resin: star
Type block copolymer=75: 25；The star block copolymer is by ethenylidene polyamines that molecular weight is 300, molecular weight
5000 polymeric acrylic acid blocks and molecular weight are prepared from for 1000 polypropylene/olefin blocks；The molecular weight of star block copolymer is
3550；During preparation, the weight/mass percentage composition of three is respectively：Ethenylidene polyamines is 5%, and polymeric acrylic acid block is 80%,
Polypropylene/olefin block is 15%；Ethenylidene polyamines is used as initiator.
The preparation method of above-mentioned dispersion-strengtherning ceramic composite, comprises the following steps：
Step 1, vacuum mixing：
By the composition proportion in above-mentioned dispersion-strengtherning ceramic composite, by the carborundum of different shape, calcium sulfate crystal whiskers,
Titanium fiber and composite adhesive are placed in mixing reactor, under the conditions of vacuum is 20Pa, are uniformly mixed, and are stirred
Revolution is 100r/min, and incorporation time is 10min, and slurry is obtained；
Step 2, vacuum vibration moulding by casting：
By slurry, under the conditions of vacuum is 60Pa, in vibrating casting to mould；Wherein, vibration frequency is 30Hz, cast
Cavity body of mould by wanting metallic matrix cast steel in connection and inner core to constitute；
Step 3, curing molding：
Mould is put into curing oven with cast slurry, 160 DEG C are heated to, is solidified, hardening time is 6h, be obtained more
Dissipate intensified ceramic composite.
Dispersion-strengtherning ceramic composite manufactured in the present embodiment, the pore volume percentage in described ceramic composite
Than≤0.01%.
Ceramic composite manufactured in the present embodiment, metal material in connection is cast steel；With metal as base with reference to after
The continuous phase of body, the silicon-carbide particle of different shape, calcium sulfate crystal whiskers and the composite that Titanium fiber is the second phase composition,
Silicon-carbide particle, calcium sulfate crystal whiskers and Titanium fiber are interweaved disperse in metal surface.
The heat resistance of the metal matrix ceramic composites that the present embodiment is prepared can reach 260 DEG C, wearability with it is general
Compared to improving 5.4 times, thermal coefficient of expansion is 13.0 × 10 to logical wear-resisting alloy steel-6/k-1, rupture strength can reach 95MPa, anti-
Compressive Strength 176MPa, fracture elongation can reach 0.2%.
Embodiment 3
A kind of dispersion-strengtherning ceramic composite, the Titanium by carborundum, calcium sulfate crystal whiskers, surface with passivating film is fine
Peacekeeping composite adhesive is composited, in described ceramic composite, the silicon-carbide particle of different shape, calcium sulfate crystal whiskers and
Titanium fiber and composite adhesive are interweaved distribution；Wherein：
In mass ratio, 2mm ± 0.5mm polyhedrons silicon-carbide particle: 450 μm of ± 50 μm of polyhedron silicon-carbide particles: 15 μm
± 5 μm of spherical carbide silicon: 90nm ball shaped nano carborundum: draw ratio is the calcium sulfate crystal whiskers of 110 and a diameter of 0.5 μm: diameter 7
μm and length 2.4mm surfaces with passivating film Titanium fiber: compound binding agent=15: 15: 10: 3: 10: 0.5: 25；
Described compound binding agent is constituted by by epoxy resin and star block copolymer, in mass ratio, epoxy resin: star
Type block copolymer=85: 15；The star block copolymer is by ethenylidene polyamines that molecular weight is 200, molecular weight
3000 polymeric acrylic acid blocks and molecular weight are prepared from for 3500 polypropylene/olefin blocks；The molecular weight of star block copolymer is
3500；During preparation, the weight/mass percentage composition of three is respectively：Ethenylidene polyamines is 3%, and polymeric acrylic acid block is 50%,
Polypropylene/olefin block is 47%；Ethenylidene polyamines is used as initiator.
The preparation method of above-mentioned dispersion-strengtherning ceramic composite, comprises the following steps：
Step 1, vacuum mixing：
By the composition proportion in above-mentioned dispersion-strengtherning ceramic composite, by the carborundum of different shape, calcium sulfate crystal whiskers,
Titanium fiber and composite adhesive are placed in mixing reactor, under the conditions of vacuum is 100Pa, are uniformly mixed, and are stirred
Revolution is mixed for 60r/min, incorporation time is 80min, slurry is obtained；
Step 2, vacuum vibration moulding by casting：
By slurry, under the conditions of vacuum is 100Pa, in vibrating casting to mould；Wherein, vibration frequency is 30Hz, is poured
The cavity body of mould of note is constituted by wanting metallic matrix spheroidal graphite cast-iron in connection and housing；
Step 3, curing molding：
By mould and cast slurry, 100 DEG C are heated to, are solidified, hardening time is 8h, dispersion-strengtherning ceramics is obtained multiple
Condensation material.
Dispersion-strengtherning ceramic composite manufactured in the present embodiment, the pore volume percentage in described ceramic composite
Than≤0.01%.
Ceramic composite manufactured in the present embodiment, metal material in connection is spheroidal graphite cast-iron；With metal with reference to after
It is the continuous phase of matrix, the silicon-carbide particle of different shape, calcium sulfate crystal whiskers and Titanium fiber are the compound of the second phase composition
Material, silicon-carbide particle, calcium sulfate crystal whiskers and Titanium fiber are interweaved disperse in metal surface.
The heat resistance of the metal matrix ceramic composites that the present embodiment is prepared can reach 200 DEG C, wearability with it is general
Compared to improving 5.8 times, thermal coefficient of expansion is 13.8 × 10 to logical wear-resisting alloy steel-6/k-1, rupture strength can reach 98MPa, anti-
Compressive Strength 180MPa, fracture elongation can reach 0.2%.
Embodiment 4
A kind of dispersion-strengtherning ceramic composite, the Titanium by carborundum, calcium sulfate crystal whiskers, surface with passivating film is fine
Peacekeeping composite adhesive is composited, in described ceramic composite, the silicon-carbide particle of different shape, calcium sulfate crystal whiskers and
Titanium fiber and composite adhesive are interweaved distribution；Wherein：
In mass ratio, 2mm ± 0.5mm polyhedrons silicon-carbide particle: 450 μm of ± 50 μm of polyhedron silicon-carbide particles: 25 μm
± 5 μm of spherical carbide silicon: 90nm ball shaped nano carborundum: draw ratio is the calcium sulfate crystal whiskers of 100 and a diameter of 0.8 μm: diameter 9
μm and length 1.8mm surfaces with passivating film Titanium fiber: compound binding agent=10: 20: 20: 2: 5: 3: 15；
Described compound binding agent is constituted by by epoxy resin and star block copolymer, in mass ratio, epoxy resin: star
Type block copolymer=90: 10；The star block copolymer is by ethenylidene polyamines that molecular weight is 200, molecular weight
2000- polymeric acrylic acids block and molecular weight are prepared from for 4000 polypropylene/olefin blocks；The molecular weight of star block copolymer
It is 3580；During preparation, the weight/mass percentage composition of three is respectively：Ethenylidene polyamines is 4%, and polymeric acrylic acid block is
30%, polypropylene/olefin block is 66%；Ethenylidene polyamines is used as initiator.
The preparation method of above-mentioned dispersion-strengtherning ceramic composite, comprises the following steps：
Step 1, vacuum mixing：
By the composition proportion in above-mentioned dispersion-strengtherning ceramic composite, by the carborundum of different shape, calcium sulfate crystal whiskers,
Titanium fiber and composite adhesive are placed in mixing reactor, under the conditions of vacuum is 50Pa, are uniformly mixed, and are stirred
Revolution is 100r/min, and incorporation time is 45min, and slurry is obtained；
Step 2, vacuum vibration moulding by casting：
By slurry, under the conditions of vacuum is 180Pa, in vibrating casting to mould；Wherein, vibration frequency is 50Hz, is poured
The cavity body of mould of note is constituted by wanting metallic matrix stainless steel in connection and inner core；
Step 3, curing molding：
By mould and cast slurry, 160 DEG C are heated to, are solidified, hardening time is 10h, and dispersion-strengtherning ceramics are obtained
Composite.
Dispersion-strengtherning ceramic composite manufactured in the present embodiment, the pore volume percentage in described ceramic composite
Than≤0.01%.
Ceramic composite manufactured in the present embodiment, metal material in connection is stainless steel；It is with metal with reference to after
The continuous phase of matrix, the silicon-carbide particle of different shape, calcium sulfate crystal whiskers and the composite wood that Titanium fiber is the second phase composition
Material, silicon-carbide particle, calcium sulfate crystal whiskers and Titanium fiber are interweaved disperse in metal surface.
The heat resistance of the metal matrix ceramic composites that the present embodiment is prepared can reach 260 DEG C, wearability with it is general
Logical wear-resisting alloy steel is 13.2 × 10 compared to 5.9 times of raising, thermal coefficient of expansion-6/k-1, rupture strength can reach 92MPa, anti-
Compressive Strength 185MPa, fracture elongation can reach 0.2%.
Claims (10)
1. a kind of dispersion-strengtherning ceramic composite, it is characterised in that described composite by carborundum, calcium sulfate crystal whiskers,
Metallic fiber and composite adhesive are composited, in described ceramic composite, the silicon-carbide particle of different shape, calcium sulfate
Whisker and metallic fiber and composite adhesive are interweaved distribution；Wherein：
Carborundum is by 1~3mm polyhedrons silicon-carbide particle, 500~400 μm of polyhedron silicon-carbide particles, 10~30 μm of spherical carbon
SiClx and 90~100nm ball shaped nanos carborundum are constituted；Calcium sulfate crystal whiskers, its a diameter of 0.5~1.5 μm, draw ratio be 90~
110；Metallic fiber, its a diameter of 7~10 μm, length is 0.8~2.4mm；Compound binding agent, by epoxy resin and star type block
Copolymer is constituted, and the weight/mass percentage composition of epoxy resin is 75~99%, star block copolymer 1~25%；
In mass ratio, 1~3mm polyhedrons silicon-carbide particle：400~500 μm of polyhedron silicon-carbide particles：10~30 μm of spherical carbon
SiClx：90~100nm ball shaped nano carborundum: calcium sulfate crystal whiskers: metallic fiber: compound binding agent=(5~30): (5~30):
(5~20): (1~5): (1~10): (0.5~5): (15~30).
2. dispersion-strengtherning ceramic composite according to claim 1, it is characterised in that described star block copolymer
It is prepared from by ethenylidene polyamines, polymeric acrylic acid block and polypropylene/olefin block；During preparation, the weight/mass percentage composition of three
Respectively：Ethenylidene polyamines is 1~5%, and polymeric acrylic acid block is 20~80%, and polypropylene/olefin block is 15~79%；
Ethenylidene polyamines is used as initiator.
3. dispersion-strengtherning ceramic composite according to claim 2, it is characterised in that described ethenylidene polyamines
Molecular weight is 100~300, and the molecular weight of polymeric acrylic acid block is 1000~5000, and the molecular weight of polypropylene/olefin block is
1000~5000, the molecular weight of star block copolymer is 3450~3550.
4. dispersion-strengtherning ceramic composite according to claim 1, it is characterised in that described metallic fiber is fine titanium
Dimension.
5. dispersion-strengtherning ceramic composite according to claim 1, it is characterised in that described ceramic composite,
Its pore volume percentage≤0.01%；Its thermal coefficient of expansion is 13.0 × 10-6~14.0 × 10-6/k-1, rupture strength can be with
92~100MPa, 176~188MPa of compression strength are reached, fracture elongation is 0.1~0.2%；Its proportion≤2.6；With metal
Temperature in use≤260 DEG C after matrix combination.
6. dispersion-strengtherning ceramic composite according to claim 1, it is characterised in that described ceramic composite,
Metal material in connection is stainless steel, cast steel or spheroidal graphite cast-iron；Continuous phase with reference to after with metal as matrix, different shape
Silicon-carbide particle, calcium sulfate crystal whiskers and composite that metallic fiber is the second phase composition, silicon-carbide particle, calcium sulfate crystal whiskers
Disperse is interweaved in metal surface with metallic fiber.
7. the preparation method of the dispersion-strengtherning ceramic composite described in claim 1, it is characterised in that comprise the following steps：
Step 1, vacuum mixing：
By carborundum, calcium sulfate crystal whiskers, metallic fiber and composite adhesive, under vacuum, it is well mixed, slurry is obtained；
Wherein：
Carborundum is by 1~3mm polyhedrons silicon-carbide particle, 500~400 μm of polyhedron silicon-carbide particles, 10~30 μm of spherical carbon
SiClx and 90~100nm ball shaped nanos carborundum are constituted；
Calcium sulfate crystal whiskers, its a diameter of 0.5~1.5 μm, draw ratio is 90~110；
Metallic fiber, its a diameter of 7~10 μm, length is 0.8~2.4mm；
Compound binding agent, is made up of epoxy resin and star block copolymer, the weight/mass percentage composition of epoxy resin for 75~
99%, star block copolymer 1~25%；
By weight/mass percentage composition, carborundum weight/mass percentage composition+calcium sulfate crystal whiskers weight/mass percentage composition+metallic fiber quality percentage
Content+composite adhesive weight/mass percentage composition=100%；1~3mm polyhedron silicon-carbide particles：5~30%, 400~500 μm
Polyhedron silicon-carbide particle：5~30%, 10~30 μm of spherical carbide silicon：5~20%, 90~100nm ball shaped nano carborundum 1
~5%；Calcium sulfate crystal whiskers：1~10%；Metallic fiber：0.5~5%, compound binding agent：15~30%；
Step 2, vacuum vibration moulding by casting：
By slurry, under vacuo, in vibrating casting to mould；
Step 3, curing molding：
By mould and cast slurry, 60~160 DEG C are heated to, are solidified, hardening time is 6~12h, and dispersion-strengtherning pottery is obtained
Porcelain composite.
8. the preparation method of dispersion-strengtherning ceramic composite according to claim 7, it is characterised in that the step 1
In, metallic fiber is titanium fiber；The star block copolymer is by ethenylidene polyamines, polymeric acrylic acid block and polypropylene/olefin
Block is prepared from；During preparation, the weight/mass percentage composition of three is respectively：Ethenylidene polyamines is 1~5%, polymeric acrylic acid
Block is 20~80%, and polypropylene/olefin block is 15~79%；Ethenylidene polyamines is used as initiator.
9. the preparation method of dispersion-strengtherning ceramic composite according to claim 8, it is characterised in that described sub- second
The molecular weight of alkenyl polyamine is 100~300, and the molecular weight of polymeric acrylic acid block is 1000~5000, polypropylene/olefin block
Molecular weight is 1000~5000, and the molecular weight of star block copolymer is 3450~3550.
10. the preparation method of dispersion-strengtherning ceramic composite according to claim 7, it is characterised in that the step 1
In, 20~200Pa of vacuum is well mixed material using stirring, and agitation revolution is 20~100r/min, and incorporation time is 10
~120min；In the step 2, vacuum is 60~180Pa, and vibration frequency is 10~50Hz.
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