CN106747545B - 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 PDF

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CN106747545B
CN106747545B CN201611167239.3A CN201611167239A CN106747545B CN 106747545 B CN106747545 B CN 106747545B CN 201611167239 A CN201611167239 A CN 201611167239A CN 106747545 B CN106747545 B CN 106747545B
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composite
silicon
dispersion
ceramic composite
calcium sulfate
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CN106747545A (en
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姜茂发
宋景尧
史培阳
范汇超
陆建民
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LIAONING KEYING REFRACTORY MATERIAL CO Ltd
Northeastern University China
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LIAONING KEYING REFRACTORY MATERIAL CO Ltd
Northeastern University China
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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 silicon-carbide particle, calcium sulfate crystal whiskers and the metallic fiber and composite adhesive of different shape 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 made;2) by slurry, under vacuo, vibrating casting is into mould;3) by mould and cast slurry, solidified, dispersion-strengtherning ceramic composite is made;Abrasion and etching problem of the solid-liquid medium effectively solved compared with highly corrosive of the invention in conveying to pump housing material, the composite of preparation, with metallic matrix adhesive force is strong, hardness is high, wear-resisting, corrosion-resistant, anti-oxidant and heat shock resistance is good the features such as;Applied to fields such as chemical industry, pharmacy and papermaking.

Description

A kind of dispersion-strengtherning ceramic composite and preparation method thereof
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 loss larger, not only improves production cost, And it is also easy to produce potential safety hazard.To solve this problem, frequently with the method for lining rubber or 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 highlighted in some special industry fields 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 handle solid phase in the corrosivity solid-liquid fluid of chloride, wherein chloride ion content≤15%, corrosive fluid and contain Amount≤20%, temperature≤260 DEG C;In addition, the composite prepared using the art of this patent 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 by carborundum, calcium sulfate crystal whiskers, metallic fiber and compound binding agent are mixed 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.
The dispersion-strengtherning ceramic composite of the present invention, by carborundum, calcium sulfate crystal whiskers, metallic fiber and composite adhesive It is composited, in described ceramic composite, silicon-carbide particle, calcium sulfate crystal whiskers and the metallic fiber of different shape 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 composition;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 by ethenylidene polyamines, polymeric acrylic acid block and polypropylene/olefin block prepare and 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, silicon-carbide particle, calcium sulfate crystal whiskers and metallic fiber the answering for the second phase composition of different shape 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 the dispersion-strengtherning ceramic composite of the present invention, comprises the following steps:
Step 1, vacuum is mixed:
By carborundum, calcium sulfate crystal whiskers, metallic fiber and composite adhesive, under vacuum, it is well mixed, slurry is made 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 composition;
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, vibrating casting is into mould;
Step 3, curing molding:
By mould and cast slurry, 60~160 DEG C are heated to, is solidified, hardening time is 6~12h, disperse is made 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 length of calcium sulfate crystal whiskers and the ratio of its diameter.
In the step 1,1~3mm polyhedron silicon-carbide particles, refer to polyhedron silicon-carbide particle average diameter for 1~ 3mm polyhedron silicon-carbide particle;500~400 μm of polyhedron silicon-carbide particles, refer to polyhedron silicon-carbide particle average diameter For 500~400 μm of polyhedron silicon-carbide particle;10~30 μm of spherical carbide silicon, refer to the ball that average diameter is 10~30 μm Shape carborundum;90~100nm spherical carbide silicon, refers to the 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 For 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, 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 by wanting metallic matrix in connection and inner core or housing to constitute.
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:
Have high rigidity by oneself using thyrite, it is high-wearing feature, high corrosion-resistant, high grinding capacity, heat-resisting quantity, anti- The excellent properties such as thermal shock resistance, and by calcium sulfate crystal whiskers and ultrafine metal fibers obdurability height, stability and good thermal shock etc. Feature carries out the strengthening and toughening of composite ceramic material, is mixed by vacuum, vacuum vibration moulding by casting and low-temperature setting react work Skill, the in-situ control of ceramic composite is carried out in metal surface, and utilize 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 Expect the problem of comprehensive mechanical property is not enough, this patent is intended to obtain a kind of with hardness is high, modulus of elasticity is big and coefficient of friction is small Engineering ceramics new material, and the material will also have higher temperature in use, high abrasion resistance, high corrosion resistance energy, Higher bending strength and fracture toughness energy, and the performance indications such as self-lubricating property.
The present invention matches somebody with somebody using the material such as different-grain diameter and the carborundum of form, calcium sulfate crystal whiskers and metallic fiber 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, using metal as matrix, is with metal in its surface recombination ceramic material to be For 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, simultaneously, it is easy to low temperature moulding processing, and it is strong with metallic matrix adhesive force, the porosity is extremely low.
Dispersion-strengtherning ceramic composite of the present invention and preparation method thereof, compared with prior art, has the beneficial effect that:
The present invention can effectively solve the problem that abrasion and corrosion of the solid-liquid medium in conveying to pump housing material compared with highly corrosive 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, production security and reliability in fluid delivery process is improved;This is for improving China's high corrosion-resistant and the key equipment exploitation of high temperature solid-liquid fluid-mixing conveying and material preparation technology 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.
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: diameter 8 of 100 and a diameter of 1 μm μm and length 1mm surfaces have passivating film Titanium fiber: compound binding agent=30: 5: 20: 5: 10: 5: 15;
Described compound binding agent epoxy resin and star block copolymer by being made up of, in mass ratio, epoxy resin: star Type block copolymer=99: 1;Ethenylidene polyamines that the star block copolymer is 300 by molecular weight, molecular weight are 1000 Polymeric acrylic acid block and molecular weight are that 5000 polypropylene/olefin blocks are prepared from;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 is mixed:
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, under the conditions of vacuum is 200Pa, and stirring mixing is equal Even, agitation revolution is 20r/min, and incorporation time is 120min, and slurry is made;
Step 2, vacuum vibration moulding by casting:
By slurry, under the conditions of vacuum is 180Pa, vibrating casting is into mould;Wherein, vibration frequency is 20Hz, is poured The cavity body of mould of note is by wanting metallic matrix stainless steel in connection and housing to constitute;
Step 3, curing molding:
By mould and cast slurry, 60 DEG C are heated to, is solidified, hardening time is 12h, dispersion-strengtherning ceramics are made multiple Condensation material.
Pore volume percentage in dispersion-strengtherning ceramic composite manufactured in the present embodiment, described ceramic composite Than≤0.01%.
Ceramic composite manufactured in the present embodiment, metal material in connection is stainless steel;With reference to after using metal as The continuous phase of matrix, silicon-carbide particle, calcium sulfate crystal whiskers and the Titanium fiber of different shape are the composite wood 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 for 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: diameter of 90 and a diameter of 1.5 μm 10 μm of Titanium fibers: compound binding agent=5: 30: 20: 1: 5: 5: 30 with length 1.2mm surfaces with passivating film;
Described compound binding agent epoxy resin and star block copolymer by being made up of, in mass ratio, epoxy resin: star Type block copolymer=75: 25;Ethenylidene polyamines that the star block copolymer is 300 by molecular weight, molecular weight are 5000 polymeric acrylic acid blocks and molecular weight are that 1000 polypropylene/olefin blocks are prepared from;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 is mixed:
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, are stirred Revolution is 100r/min, and incorporation time is 10min, and slurry is made;
Step 2, vacuum vibration moulding by casting:
By slurry, under the conditions of vacuum is 60Pa, vibrating casting is into 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 is heated to, is solidified, hardening time is 6h, is made more Dissipate intensified ceramic composite.
Pore volume percentage in dispersion-strengtherning ceramic composite manufactured in the present embodiment, described ceramic composite Than≤0.01%.
Ceramic composite manufactured in the present embodiment, metal material in connection is cast steel;Using metal as base with reference to after The continuous phase of body, silicon-carbide particle, calcium sulfate crystal whiskers and the Titanium fiber of different shape are the composite of the second phase composition, Silicon-carbide particle, calcium sulfate crystal whiskers and Titanium fiber are interweaved disperse in metal surface.
The heat resistance for 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 compared to improving 5.4 times, and thermal coefficient of expansion is 13.0 × 10-6/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: diameter 7 of 110 and a diameter of 0.5 μm μm and length 2.4mm surfaces have passivating film Titanium fiber: compound binding agent=15: 15: 10: 3: 10: 0.5: 25;
Described compound binding agent epoxy resin and star block copolymer by being made up of, in mass ratio, epoxy resin: star Type block copolymer=85: 15;Ethenylidene polyamines that the star block copolymer is 200 by molecular weight, molecular weight are 3000 polymeric acrylic acid blocks and molecular weight are that 3500 polypropylene/olefin blocks are prepared from;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 is mixed:
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, is uniformly mixed, is stirred Revolution is mixed for 60r/min, incorporation time is 80min, slurry is made;
Step 2, vacuum vibration moulding by casting:
By slurry, under the conditions of vacuum is 100Pa, vibrating casting is into mould;Wherein, vibration frequency is 30Hz, is poured The cavity body of mould of note is by wanting metallic matrix spheroidal graphite cast-iron in connection and housing to constitute;
Step 3, curing molding:
By mould and cast slurry, 100 DEG C are heated to, is solidified, hardening time is 8h, dispersion-strengtherning ceramics are made multiple Condensation material.
Pore volume percentage in dispersion-strengtherning ceramic composite manufactured in the present embodiment, 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 For the continuous phase of matrix, silicon-carbide particle, calcium sulfate crystal whiskers and the Titanium fiber of different shape 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 for 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 compared to improving 5.8 times, and thermal coefficient of expansion is 13.8 × 10-6/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: diameter 9 of 100 and a diameter of 0.8 μm μm and length 1.8mm surfaces have passivating film Titanium fiber: compound binding agent=10: 20: 20: 2: 5: 3: 15;
Described compound binding agent epoxy resin and star block copolymer by being made up of, in mass ratio, epoxy resin: star Type block copolymer=90: 10;Ethenylidene polyamines that the star block copolymer is 200 by molecular weight, molecular weight are 2000- polymeric acrylic acids block and molecular weight are that 4000 polypropylene/olefin blocks are prepared from;The molecular weight of star block copolymer For 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 is mixed:
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, are stirred Revolution is 100r/min, and incorporation time is 45min, and slurry is made;
Step 2, vacuum vibration moulding by casting:
By slurry, under the conditions of vacuum is 180Pa, vibrating casting is into mould;Wherein, vibration frequency is 50Hz, is poured The cavity body of mould of note is by wanting metallic matrix stainless steel in connection and inner core to constitute;
Step 3, curing molding:
By mould and cast slurry, 160 DEG C are heated to, is solidified, hardening time is 10h, dispersion-strengtherning ceramics are made Composite.
Pore volume percentage in dispersion-strengtherning ceramic composite manufactured in the present embodiment, described ceramic composite Than≤0.01%.
Ceramic composite manufactured in the present embodiment, metal material in connection is stainless steel;With reference to after using metal as The continuous phase of matrix, silicon-carbide particle, calcium sulfate crystal whiskers and the Titanium fiber of different shape are the composite wood 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 for 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, silicon-carbide particle, the calcium sulfate of different shape Whisker and metallic fiber and composite adhesive are interweaved distribution;Wherein:
Carborundum is by 1~3mm polyhedrons silicon-carbide particle, 400~500 μm of polyhedron silicon-carbide particles, 10~30 μm of spherical carbon SiClx and 90~100nm ball shaped nanos carborundum composition;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 that titanium is fine 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 that 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%;Its proportion≤2.6;With gold Belong to temperature in use≤260 DEG C after matrix is combined.
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;Using metal as the continuous phase of matrix, different shape with reference to after Silicon-carbide particle, calcium sulfate crystal whiskers and metallic fiber be the second phase composition composite, 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 is mixed:
By carborundum, calcium sulfate crystal whiskers, metallic fiber and composite adhesive, under vacuum, it is well mixed, slurry is made; Wherein:
Carborundum is by 1~3mm polyhedrons silicon-carbide particle, 400~500 μm of polyhedron silicon-carbide particles, 10~30 μm of spherical carbon SiClx and 90~100nm ball shaped nanos carborundum composition;
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, vibrating casting is into mould;
Step 3, curing molding:
By mould and cast slurry, 60~160 DEG C are heated to, is solidified, hardening time is 6~12h, dispersion-strengtherning pottery is made 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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