CN108752014A - One kind being used for precinct laser sintering（SLS）/ precinct laser melts（SLM）Powder and its preparation method and application - Google Patents
One kind being used for precinct laser sintering（SLS）/ precinct laser melts（SLM）Powder and its preparation method and application Download PDFInfo
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- CN108752014A CN108752014A CN201810456362.XA CN201810456362A CN108752014A CN 108752014 A CN108752014 A CN 108752014A CN 201810456362 A CN201810456362 A CN 201810456362A CN 108752014 A CN108752014 A CN 108752014A
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
- B22F1/17—Metallic particles coated with metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/628—Coating the powders or the macroscopic reinforcing agents
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/634—Polymers
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
- C04B2235/602—Making the green bodies or pre-forms by moulding
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/66—Specific sintering techniques, e.g. centrifugal sintering
- C04B2235/665—Local sintering, e.g. laser sintering
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Abstract
The invention belongs to increases material manufacturing technology fields, more particularly to a kind of powder and its preparation method and application melting (SLM) for precinct laser sintering (SLS)/precinct laser.Powder of the present invention includes matrix and clad, and clad is coated on the surface of matrix；Matrix is one or more in ceramic matrix, hard alloy substrate and refractory metal basal body；Clad is one or more in organic binder, inorganic binder and low-melting-point metal.In the present invention, organic binder is evenly affixed to matrix surface, reduces the dosage of organic binder, can alleviate using the low problem of binder molding blank consistency；When clad includes inorganic binder and/or low-melting-point metal, in SLS/SLM formings, inorganic binder and/or low-melting-point metal play the effect of binder, play the role of sintering aid, and play activeness and quietness, solve the problem of that ceramic material, cemented carbide material and refractory metal material easy to produce crackle forming difficulty in SLS/SLM formings.
Description
Technical field
The invention belongs to increases material manufacturing technology fields, more particularly to one kind being used for precinct laser sintering (SLS)/precinct laser
Melt the powder and its preparation method and application of (SLM).
Background technology
Precinct laser sintering (Selective Laser Sintering, SLS) and precinct laser melt (Selective
Laser melting, SLM) be increases material manufacturing technology important branch, forming complex structural member, shorten part process time
Huge advantage is shown with cost etc. is reduced.
SLS was proposed by the Carl Ckard in the U.S. branch schooles Texas universities Austin in 1989, using fore-put powder, was swashed
Light is selectively layered sintering solid powder, and so that the cured layer of thermal sintering is layering and generate the part of required shape.Root
According to the different bonding mechanism of sintering process, SLS point is solid state sintering, chemical induction connection, the liquid-phase sintering of part fusing and complete
Four type of running down；Divide for addition binder according to binder, SLS whether is used in forming process and do not add binder
Two classes.In the SLS for adding binder, dusty material is mixed with binder first, laser is selectively layered sintered compound powder
End obtains drip molding, and then gained drip molding is placed in heating furnace, removes binder therein by ungrease treatment, then carry out
Infiltration is handled, and filler is penetrated into hole；For not adding the SLS of binder, agglomerated material is by high-melting-point and low melting point two
Kind dusty material is constituted, during laser scanning, the powder particles fuse of low melting point, and dystectic powder particle temperature liter
It is high but and it is unfused, the powder particle of low melting point is bonded together dystectic dusty material to form forming as binder
Part.
SLM is on the basis of SLS, and nineteen ninety-five proposes there is selection using laser by German Fraunhofer laser research institute
Solid powder is melted in ground layering, and melting layer solidification superposition is made to form part.Different from SLS, SLM is not needed in forming process
It adds binder but forming is realized by the melting and solidification of powder, can more easily control porosity and pore shape, at
Shape provides the porous member of complex internal structure.Simultaneously as powder is through laser scanning fast melt, false set, microcosmic group
Knit it is fine and closely woven, SLM drip molding mechanical properties be better than casting so that it is formed with outstanding advantage complicated difficult workpiece, be suitble to
In the irregular component of complexity for processing small structure, high quality and the reparation and the Surface Engineering that carry out part, in aerospace, automobile
And the fields such as biologic medical have shown good application prospect.
Plastics, nylon, resin and metal material SLS/SLM technologies have been achieved for preferable achievement in research and in aviation
It is used widely in the fields such as space flight, medical treatment, mold, automobile.However ceramic material, cemented carbide material and refractory metal material
Deng since fusing point is high, brittleness is big, plasticity and poor toughness, crackle is also easy to produce under thermal shock, simultaneously because SLS/SLM rapid heating and coolings
Processing characteristic so that above-mentioned material easy tos produce crackle in forming process, and forming difficulty uses binder, molding blank
Consistency is low.Shahzad etc. is used as organic binder, indirect SLS to shape Al using polyamide (Polyamide, PA)2O3, for
The raw material of different binder contents carries out contrast experiment, when binder content is 40%, obtains SLS drip molding relative densities
50.4%；When binder content is 50%, relative density 43.1%.Researches show that bonded in powder when aluminium oxide SLS shapes
Agent content is higher, and sintered part consistency is lower, shows that the removal of binder in sintered part is also to influence drip molding consistency, causes
There is one of the reason of micro-pore in inside.German Fraunhofer laser research institute Hagedorn etc. uses CO2Laser is pre-
For hot powder bed to 1715 DEG C, Nd: YAG laser scans melts Al2O3And ZrO2Mixed-powder (ZrO241.5wt%,
Al2O3The test specimen that consistency is 100% 58.5wt%) is obtained, which has under non-postmenstruation sintering process and disposition
There is fine-grained two-phase structure's structure：Tetragonal zirconia and α-Al2O3, bending strength is higher than 500MPa.However, specimen surface
Roughness is high, when the height of test specimen is more than 3mm, test specimen by cannot reach 100% consistency and will produce crackle.
Invention content
In view of this, the present invention provides a kind of powder, for solving ceramic material, cemented carbide material and refractory metal
Material etc. easy tos produce crackle, forming is tired since fusing point is high, brittleness is big, plasticity and poor toughness in SLS/SLM forming processes
Difficulty uses the low problem of binder molding blank consistency.
The specific technical solution of the present invention is as follows：
A kind of powder, the powder include matrix and clad, and the clad is coated on the surface of described matrix；
Described matrix is one or more in ceramic matrix, hard alloy substrate and refractory metal basal body；
The clad is one or more in organic binder, inorganic binder and low-melting-point metal.
Preferably, the sphericity of the powder is 0.75~1；
The grain size of the powder is 5 μm~160 μm.
Preferably, the grain size of described matrix is 1 μm~150 μm；
The thickness of the clad is 10nm~10 μm.
Preferably, the ceramic matrix is oxide ceramics and/or non-oxide ceramics；
The hard alloy is one or more in tungsten carbide, titanium carbide and ramet；
The refractory metal basal body is one or more in tungsten, platinum, titanium and chromium；
The oxide ceramics is aluminium oxide and/or zirconium oxide；
The non-oxide ceramics be silicon nitride, boron nitride, diamond, silicon carbide, aluminium nitride, titanium nitride, titanium carbonitride,
It is one or more in boron carbide, titanium diboride and apatite.
Preferably, the organic binder is one kind or more in polyamide, polymethyl methacrylate and epoxy resin
Kind；
The inorganic binder is one or more in calcium oxide, magnesia, zinc oxide and yttrium oxide；
The low-melting-point metal is one or more in cobalt, nickel, tin and lead.
The present invention also provides a kind of preparation methods of powder, include the following steps：
Matrix is suspended in atomization chamber, covering liquid is added into the atomization chamber and the covering liquid is made to be atomized, atomization
The surface that covering liquid afterwards is coated on described matrix forms clad, obtains the powder；
Wherein, the covering liquid is heated to melting and is made by covering material；
Described matrix is one or more in ceramic matrix, hard alloy substrate and refractory metal basal body；
The clad is one or more in organic binder, inorganic binder and low-melting-point metal.
Preferably, the atomization is pressurizing atomizing；
The pressure of the pressurizing atomizing is 0.5MPa~10MPa；
The time of the pressurizing atomizing is 5min~100min.
Preferably, the temperature of the atomization is 20 DEG C~200 DEG C.
Preferably, it is described matrix is suspended in atomization chamber before, further include：Described matrix is dried.
The present invention also provides powder made from preparation method described in powder described in above-mentioned technical proposal or above-mentioned technical proposal
Application in increasing material manufacturing.
In conclusion the present invention provides a kind of powder, the powder includes matrix and clad, the clad cladding
In the surface of described matrix；Described matrix is one or more in ceramic matrix, hard alloy substrate and refractory metal basal body；
The clad is one or more in organic binder, inorganic binder and low-melting-point metal.In the present invention, clad packet
When including organic binder, organic binder is evenly affixed to matrix surface, reduces the dosage of organic binder in existing SLS,
It alleviates using the low problem of binder molding blank consistency so that printing effect is more preferable；Clad includes inorganic binder
And/or when low-melting-point metal, in SLS/SLM forming processes, the work of inorganic binder and/or low-melting-point metal performance binder
With playing the role of sintering aid, while also acting as activeness and quietness, solve ceramic material, cemented carbide material and difficulty
The problem of iron-melting metal material easy tos produce crackle in SLS/SLM forming processes, forming difficulty, and clad can be directed to SLS/
The characteristics of SLM rapid heating and coolings, plays the role of the resist that radiates, and heat conduction gradient is reduced, to delay heat losses.
Specific implementation mode
The present invention provides a kind of powder, for solve ceramic material, cemented carbide material and refractory metal material etc. by
It is high in fusing point, brittleness is big, plasticity and poor toughness, crackle, forming difficulty, using viscous are easy tod produce in SLS/SLM forming processes
Tie the low problem of agent molding blank consistency.
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Mode is only some embodiments of the invention, rather than whole embodiments.Based on the embodiment in the present invention, originally
The every other embodiment that field those of ordinary skill is obtained without making creative work, belongs to this hair
The range of bright protection.
A kind of powder, powder include matrix and clad, and clad is coated on the surface of matrix；
Matrix is one or more in ceramic matrix, hard alloy substrate and refractory metal basal body；
Clad is one or more in organic binder, inorganic binder and low-melting-point metal.
In the present invention, when clad includes organic binder, organic binder is evenly affixed to matrix surface, reduces existing
The dosage for having organic binder in SLS is alleviated using the low problem of binder molding blank consistency so that printing effect is more
It is good；When clad includes inorganic binder and/or low-melting-point metal, in SLS/SLM forming processes, inorganic binder and/or
Low-melting-point metal plays the effect of binder, plays the role of sintering aid, while also acting as activeness and quietness, solves pottery
Ceramic material, cemented carbide material and refractory metal material easy to produce crackle in SLS/SLM forming processes, and forming difficulty is asked
Topic, and clad can be directed to SLS/SLM rapid heating and coolings the characteristics of, play the role of radiate resist, reduce heat conduction gradient, to
Delay heat losses.
In the present invention, the sphericity of powder is 0.75~1；
The grain size of powder is 5 μm~160 μm.
The grain size of powder is more preferably 5 μm~90 μm.The D50 of powder is 20 μm~55 μm, and the D50 of powder is more preferably 25
μm~45 μm.
The grain size of matrix is 1 μm~150 μm, and the grain size of matrix is more preferably 5 μm~90 μm；
The thickness of clad is 10nm~10 μm.Wherein, the grain size of matrix is in normal distribution.
In the present invention, ceramic matrix is oxide ceramics and/or non-oxide ceramics；
The hard alloy is one or more in tungsten carbide, titanium carbide and ramet；
Refractory metal basal body is one or more in tungsten, platinum, titanium and chromium；
Oxide ceramics is aluminium oxide and/or zirconium oxide；
Non-oxide ceramics are silicon nitride, boron nitride, diamond, silicon carbide, aluminium nitride, titanium nitride, titanium carbonitride, carbonization
It is one or more in boron, titanium diboride and apatite.
In the present invention, organic binder is one or more in polyamide, polymethyl methacrylate and epoxy resin；
Inorganic binder is one or more in calcium oxide, magnesia, zinc oxide and yttrium oxide；
Low-melting-point metal is one or more in cobalt, nickel, tin and lead.
In the present invention, when clad includes organic binder, organic binder is evenly affixed to matrix surface, and existing
By dusty material and binder mixed phase ratio in SLS technologies, reduce the dosage of organic binder in existing SLS, alleviating makes
With the low problem of binder molding blank consistency so that printing effect is more preferable, also, in the sintering in powder later stage, bonds
Agent can complete the densification of ceramic matrix, and the ceramic material for solving not applicable SLS/SLM straight formings sintering integratedization carries out
The problem of SLS/SLM forming and sinterings, such as needs the silicon nitride structure part by hot pressed sintering；Clad includes inorganic binder
And/or when low-melting-point metal, in SLS/SLM forming processes, the work of inorganic binder and/or low-melting-point metal performance binder
With, in sintering process, play the role of sintering aid, while also acting as activeness and quietness, solve ceramic material, hard
The problem of alloy material and refractory metal material easy to produce crackle in SLS/SLM forming processes, forming difficulty, is such as aoxidizing
Zirconium surface-coated aluminum oxide plays a part of sintering aid according to molten principle aluminium oxide altogether, last aluminium oxide in sintering process,
Inhibiting effect is played to the grain growth of zirconium oxide, plays the role of activeness and quietness；And clad can be directed to the anxious heat of SLS/SLM
The characteristics of chilling, plays the role of the resist that radiates, and heat conduction gradient is reduced, to delay heat losses.
Powder of the present invention is included in the powder of alumina powder surface cladding polyamide clad, on silicon carbide powder surface
The powder of coated epoxy resin clad, in SLS/SLM print procedures, printed material surface layer fusing point reduces powder of the present invention,
And then printing effect and printing precision are notable.Table 1 is the fusing point of common basis material and covering material.
The fusing point of basis material and covering material in 1 present invention of table
The present invention also provides a kind of preparation methods of powder, include the following steps：
Matrix is suspended in atomization chamber, covering liquid is added into atomization chamber and covering liquid is made to be atomized, the cladding after atomization
The surface that liquid is coated on matrix forms clad, obtains powder；
Wherein, covering liquid is heated to melting and is made by covering material；
Matrix is one or more in ceramic matrix, hard alloy substrate and refractory metal basal body；
Clad is one or more in organic binder, inorganic binder and low-melting-point metal.
In the present invention, it is atomized as pressurizing atomizing；
The pressure of pressurizing atomizing is 0.5MPa~10MPa；
The time of pressurizing atomizing is 5min~100min.
In the present invention, the temperature of atomization is 20 DEG C~200 DEG C.
Further, before matrix being suspended in atomization chamber, further include：Matrix is dried.
Dry to be air-dried or being dried in vacuo in the present invention, dry temperature is 40 DEG C~100 DEG C, the dry time
For 3h~for 24 hours.
The present invention also provides powder made from preparation method described in powder described in above-mentioned technical proposal or above-mentioned technical proposal
Application in increasing material manufacturing, the more preferably application in SLS/SLM printings.
In the present invention, the preparation method of powder is evenly dispersed in atomization chamber by matrix, and then pressurization introduces covering material
It is heated to melting the surface formation clad that covering liquid obtained is atomized and is coated on matrix so that covering material is wrapped in
The surface of matrix, the preparation method are modified basis material by atomized molten cladding process, powder made from the preparation method
Last sphericity is more preferable, and grain size is more uniform, and by adjusting the technological parameter of the preparation method, the thickness of clad can be by adjusting
The dosage and nebulisation time of covering are adjusted, and the thickness and ingredient of clad can be accurately controlled, be obtained by above-mentioned preparation method
To power applications when the SLS/SLM so that SLS/SLM is more prone to from powdering to printing, and then significantly improve printing effect and
Printing precision is very suitable for the demand of SLS/SLM 3D printings.And the covering material of the clad of powder of the present invention may be selected
Type is more, and the ingredient of clad can accurately control, and the preparation process of powder of the present invention is excellent, easy to operate.
In the present invention, during cladding, powder passes through secondary granulation, and adjustment atomized molten coats parameter, can control
Its grain size D50 is distributed in 20 μm~55 μ ms, and under the effect of the laser, clad plays the effect of bonding matrix material,
Controllable particle diameter distribution so that printing effect is more preferable.
It should be noted that the preparation method of powder of the present invention is not limited to atomized molten cladding process, further include mechanical mixture,
Sol-gal process, the precipitation method, microemulsion polymerization method, are not specifically limited herein.
For a further understanding of the present invention, with reference to specific embodiment, the present invention will be described in detail.
Embodiment 1
1, prepare raw material
Basis material is selected as ceramic zirconium oxide, and coating layer material is selected as polyamide.
2, prepared by atomized molten cladding process coats the powder of polyamide clad on Zirconium powder surface
The Zirconium powder that average grain diameter is 90nm is dried into 12h in 60 DEG C of convection ovens, then by the oxygen after drying
Change zirconium powder body to put into the atomisation tower of atomising device, open outlet air switch below atomisation tower, air blast power is 20W, will be aoxidized
Zirconium powder body is dispelled into atomization chamber upwards；Polyamide is heated to 240 DEG C of formation covering liquids, and covering liquid is sprayed by atomizer
In same atomization chamber, atomizing pressure 0.5MPa.Atomization temperature is set as 40 DEG C, and nebulisation time is set as 10min, in air and atomization
Under the action of tower temperature degree, the polyamide after atomization is wrapped in the surface of Zirconium powder.After atomization, air blast power supply is closed,
Ceramic particle is collected and sieved, obtains coating the powder of polyamide clad, modified zirconia powder on Zirconium powder surface
The sphericity at end is 0.8~0.9, and the grain size of powder is 10 μm~50 μm, and the grain size of matrix is 1 μm~30 μm, the thickness of clad
Degree is 20nm.
Embodiment 2
1, prepare raw material
Basis material is selected as ceramic zirconium oxide, and coating layer material is selected as polyamide.
2, prepared by atomized molten cladding process coats the powder of polyamide clad on Zirconium powder surface
The Zirconium powder that average grain diameter is 90nm is dried into 12h in 70 DEG C of convection ovens, then by the oxygen after drying
Change zirconium powder body to put into the atomisation tower of atomising device, open outlet air switch below atomisation tower, air blast power is 20W, will be aoxidized
Zirconium powder body is dispelled into atomization chamber upwards；Polyamide is heated to 250 DEG C of formation covering liquids, and covering liquid is sprayed by atomizer
In same atomization chamber, atomizing pressure 1MPa.Atomization temperature is set as 40 DEG C, and nebulisation time is set as 8min, in air and atomisation tower
Under the action of temperature, the polyamide after atomization is wrapped in the surface of Zirconium powder.After atomization, air blast power supply is closed, is received
Collect and sieve ceramic particle, obtains coating the powder of polyamide clad on Zirconium powder surface, gained Zirconium oxide powder
Sphericity is 0.85~0.93, and the grain size of powder is 15 μm~60 μm, and the grain size of matrix is 5 μm~35 μm, the thickness of clad
For 25nm.
Embodiment 3
1, prepare raw material
Basis material is selected as ceramic zirconium oxide, and coating layer material is selected as polyamide.
2, prepared by atomized molten cladding process coats the powder of polyamide clad on Zirconium powder surface
The Zirconium powder that average grain diameter is 150nm is dried into 12h in 60 DEG C of convection ovens, then by the oxygen after drying
Change zirconium powder body to put into the atomisation tower of atomising device, open outlet air switch below atomisation tower, air blast power is 20W, will be aoxidized
Zirconium powder body is dispelled into atomization chamber upwards；Polyamide is heated to 250 DEG C of formation covering liquids, and covering liquid is sprayed by atomizer
In same atomization chamber, atomizing pressure 1.5MPa.Atomization temperature is set as 40 DEG C, and nebulisation time is set as 10min, in air and atomization
Under the action of tower temperature degree, the polyamide after atomization is wrapped in the surface of Zirconium powder.After atomization, air blast power supply is closed,
Ceramic particle is collected and sieved, obtains coating the powder of polyamide clad on Zirconium powder surface, the sphericity of powder is
0.86~0.95, the grain size of powder is 13 μm~70 μm, and the grain size of matrix is 10 μm~40 μm, and the thickness of clad is 30nm.
Embodiment 4
1, prepare raw material
Basis material is selected as ceramic alumina, and coating layer material is selected as polymethyl methacrylate.
2, prepared by atomized molten cladding process coats the powder of polymethyl methacrylate clad on alumina powder surface
The alumina powder that average grain diameter is 120nm is dried into 12h in 60 DEG C of convection ovens, then by the oxygen after drying
Change aluminium powder body to put into the atomisation tower of atomising device, open outlet air switch below atomisation tower, air blast power is 20W, will be aoxidized
Aluminium powder body is dispelled into atomization chamber upwards；Polymethyl methacrylate is heated to 190 DEG C of formation covering liquids, and covering liquid is passed through mist
Change nozzle to spray into same atomization chamber, atomizing pressure 0.5MPa.Atomization temperature is set as 40 DEG C, and nebulisation time is set as 5min,
Under the action of air and atomisation tower temperature, the polymethyl methacrylate after atomization is wrapped in the surface of alumina powder.Atomization
After, air blast power supply is closed, ceramic particle is collected and sieve, obtains coating poly-methyl methacrylate on alumina powder surface
The sphericity of the powder of ester clad, powder is 0.82~0.93, and the grain size of powder is 12 μm~60 μm, and the grain size of matrix is 5 μ
The thickness of m~40 μm, clad is 15nm.
Embodiment 5
1, prepare raw material
Basis material is selected as ceramic alumina, and coating layer material is selected as polymethyl methacrylate.
2, prepared by atomized molten cladding process coats the powder of polymethyl methacrylate clad on alumina powder surface
The alumina powder that average grain diameter is 150nm is dried into 12h in 60 DEG C of convection ovens, then by the oxygen after drying
Change aluminium powder body to put into the atomisation tower of atomising device, open outlet air switch below atomisation tower, air blast power is 20W, will be aoxidized
Aluminium powder body is dispelled into atomization chamber upwards；Polymethyl methacrylate is heated to 200 DEG C of formation covering liquids, and covering liquid is passed through mist
Change nozzle to spray into same atomization chamber, atomizing pressure 1MPa.Atomization temperature is set as 40 DEG C, and nebulisation time is set as 10min, in sky
Under the action of gas and atomisation tower temperature, the polymethyl methacrylate after atomization is wrapped in the surface of alumina powder.Atomization knot
Shu Hou closes air blast power supply, collects and sieve ceramic particle, obtains coating polymethyl methacrylate on alumina powder surface
The sphericity of the powder of clad, powder is 0.82~0.95, and the grain size of powder is 16 μm~72 μm, and the grain size of matrix is 8 μm
~40 μm, the thickness of clad is 20nm.
Embodiment 6
1, prepare raw material
Basis material is selected as ceramic alumina, and coating layer material is selected as polymethyl methacrylate.
2, prepared by atomized molten cladding process coats the powder of polymethyl methacrylate clad on alumina powder surface
The alumina powder that average grain diameter is 180nm is dried into 12h in 60 DEG C of convection ovens, then by the oxygen after drying
Change aluminium powder body to put into the atomisation tower of atomising device, open outlet air switch below atomisation tower, air blast power is 20W, will be aoxidized
Aluminium powder body is dispelled into atomization chamber upwards；Polymethyl methacrylate is heated to 210 DEG C of formation covering liquids, and covering liquid is passed through mist
Change nozzle to spray into same atomization chamber, atomizing pressure 1.5MPa.Atomization temperature is set as 40 DEG C, and nebulisation time is set as 5min,
Under the action of air and atomisation tower temperature, the polymethyl methacrylate after atomization is wrapped in the surface of alumina powder.Atomization
After, air blast power supply is closed, ceramic particle is collected and sieve, obtains coating poly-methyl methacrylate on alumina powder surface
The sphericity of the powder of ester clad, powder is 0.87~0.95, and the grain size of powder is 18 μm~80 μm, and the grain size of matrix is 10
μm~60 μm, the thickness of clad is 25nm.
Embodiment 7
1, prepare raw material
Basis material is selected as ceramic alumina, and coating layer material is selected as magnesia.
2, atomized molten cladding process prepares the powder in alumina powder surface coated magnesium oxide clad
The alumina powder that average grain diameter is 100nm is dried into 12h in 60 DEG C of convection ovens, then by the oxygen after drying
Change aluminium powder body to put into the atomisation tower of atomising device, open outlet air switch below atomisation tower, air blast power is 20W, will be aoxidized
Aluminium powder body is dispelled into atomization chamber upwards；Magnesia is heated to 2800 DEG C of formation covering liquids, and covering liquid is sprayed by atomizer
Enter in same atomization chamber, atomizing pressure 1.5MPa.Atomization temperature is set as 40 DEG C, and nebulisation time is set as 5min, in air and mist
Under the action of changing tower temperature degree, the magnesia after atomization is on the surface of alumina powder.After atomization, air blast power supply is closed, is received
Collect and sieve ceramic particle, obtain the powder in alumina powder surface coated magnesium oxide clad, the sphericity of powder is
0.87~0.96, the grain size of powder is 20 μm~80 μm, and the grain size of matrix is 10 μm~60 μm, and the thickness of clad is 10nm.
Embodiment 8
1, prepare raw material
Basis material is selected as ceramic alumina, and coating layer material is selected as magnesia.
2, atomized molten cladding process prepares the powder in alumina powder surface coated magnesium oxide clad
The alumina powder that average grain diameter is 180nm is dried into 12h in 60 DEG C of convection ovens, then by the oxygen after drying
Change aluminium powder body to put into the atomisation tower of atomising device, open outlet air switch below atomisation tower, air blast power is 20W, will be aoxidized
Aluminium powder body is dispelled into atomization chamber upwards；Magnesia is heated to 2900 DEG C of formation covering liquids, and covering liquid is sprayed by atomizer
Enter in same atomization chamber, atomizing pressure 1.5MPa.Atomization temperature is set as 40 DEG C, and nebulisation time is set as 5min, in air and mist
Under the action of changing tower temperature degree, the magnesia after atomization is on the surface of alumina powder.After atomization, air blast power supply is closed, is received
Collect and sieve ceramic particle, obtain the powder in alumina powder surface coated magnesium oxide clad, the sphericity of powder is
0.80~0.90, the grain size of powder is 20 μm~80 μm, and the grain size of matrix is 8 μm~60 μm, and the thickness of clad is 15nm.
Embodiment 9
1, prepare raw material
Basis material is selected as the mixture of ceramic zirconium oxide and aluminium oxide, and coating layer material is selected as epoxy resin.
2, atomized molten cladding process is prepared in zirconium oxide and aluminium oxide mixed powder surface coated epoxy resin clad
Powder
It is 90nm zirconium oxides and 100nm aluminium oxide the mixed powder dry 12h in 60 DEG C of convection ovens by average grain diameter, so
Afterwards by after drying zirconium oxide and aluminium oxide mixed powder put into the atomisation tower of atomising device, open atomisation tower below outlet air
Switch, air blast power are 20W, and zirconium oxide and aluminium oxide mixed powder are dispelled into atomization chamber upwards；Epoxy resin is heated to
60 DEG C of formation covering liquids, covering liquid are sprayed by atomizer in same atomization chamber, atomizing pressure 0.5MPa.Atomization temperature
40 DEG C are set as, nebulisation time is set as 10min, and under the action of air and atomisation tower temperature, the epoxy resin after atomization is aoxidizing
The surface of zirconium and aluminium oxide mixed powder.After atomization, air blast power supply is closed, collects and sieves ceramic particle, obtain in oxygen
Change the powder of zirconium and aluminium oxide mixed powder surface coated epoxy resin clad, the sphericity of powder is 0.83~0.96, powder
The grain size at end is 25 μm~80 μm, and the grain size of matrix is 10 μm~60 μm, and the thickness of clad is 20nm.
Embodiment 10
1, prepare raw material
Basis material is selected as ceramic nitriding silicon, and coating layer material is selected as polyamide.
2, prepared by atomized molten cladding process coats the powder of polyamide clad on beta-silicon nitride powder surface
The beta-silicon nitride powder that average grain diameter is 90nm is dried into 12h in 60 DEG C of convection ovens, then by the nitrogen after drying
SiClx powder is put into the atomisation tower of atomising device, and outlet air switch below atomisation tower is opened, and air blast power is 20W, will be nitrogenized
Silicon powder is dispelled into atomization chamber upwards；Polyamide is heated to 240 DEG C of formation covering liquids, and covering liquid is sprayed by atomizer
In same atomization chamber, atomizing pressure 0.5MPa.Atomization temperature is set as 40 DEG C, and nebulisation time is set as 10min, in air and atomization
Under the action of tower temperature degree, the polyamide after atomization is on the surface of beta-silicon nitride powder.After atomization, air blast power supply is closed, is collected
And ceramic particle is sieved, it obtains coating the powder of polyamide clad on beta-silicon nitride powder surface, the sphericity of powder is 0.88
~0.9, the grain size of powder is 20 μm~92 μm, and the grain size of matrix is 10 μm~60 μm, and the thickness of clad is 20nm.
Embodiment 11
1, prepare raw material
Basis material is selected as ceramic nitriding silicon, and coating layer material is selected as polyamide.
2, prepared by atomized molten cladding process coats the powder of polyamide clad on beta-silicon nitride powder surface
The beta-silicon nitride powder that average grain diameter is 90nm is dried into 12h in 60 DEG C of convection ovens, then by the nitrogen after drying
SiClx powder is put into the atomisation tower of atomising device, and outlet air switch below atomisation tower is opened, and air blast power is 20W, will be nitrogenized
Silicon powder is dispelled into atomization chamber upwards；Polyamide is heated to 260 DEG C of formation covering liquids, and covering liquid is sprayed by atomizer
In same atomization chamber, atomizing pressure 1.5MPa.Atomization temperature is set as 40 DEG C, and nebulisation time is set as 10min, in air and atomization
Under the action of tower temperature degree, the polyamide after atomization is on the surface of beta-silicon nitride powder.After atomization, air blast power supply is closed, is collected
And ceramic particle is sieved, it obtains coating the powder of polyamide clad on beta-silicon nitride powder surface, the sphericity of powder is 0.80
~0.9, the grain size of powder is 15 μm~92 μm, and the grain size of matrix is 15 μm~65 μm, and the thickness of clad is 25nm.
Embodiment 12
1, prepare raw material
Basis material is selected as ceramic nitriding silicon, and coating layer material is selected as polyamide.
2, prepared by atomized molten cladding process coats the powder of polyamide clad on beta-silicon nitride powder surface
The beta-silicon nitride powder that average grain diameter is 90nm is dried into 12h in 60 DEG C of convection ovens, then by the nitrogen after drying
SiClx powder is put into the atomisation tower of atomising device, and outlet air switch below atomisation tower is opened, and air blast power is 20W, will be nitrogenized
Silicon powder is dispelled into atomization chamber upwards；Polyamide is heated to 270 DEG C of formation covering liquids, and covering liquid is sprayed by atomizer
In same atomization chamber, atomizing pressure 3MPa.Atomization temperature is set as 40 DEG C, and nebulisation time is set as 10min, in air and atomisation tower
Under the action of temperature, the polyamide after atomization is on the surface of beta-silicon nitride powder.After atomization, air blast power supply is closed, is collected simultaneously
Ceramic particle to be sieved, obtains coating the powder of polyamide clad on beta-silicon nitride powder surface, the sphericity of powder is 0.75~
0.9, the grain size of powder is 16 μm~90 μm, and the grain size of matrix is 5 μm~60 μm, and the thickness of clad is 30nm.
Embodiment 13
1, prepare raw material
Basis material is selected as ceramic silicon carbide, and coating layer material is selected as epoxy resin.
2, atomized molten cladding process prepares the powder in silicon carbide powder surface coated epoxy resin clad
The silicon carbide powder that average grain diameter is 90nm is dried into 12h in 60 DEG C of convection ovens, then by the carbon after drying
SiClx powder is put into the atomisation tower of atomising device, and outlet air switch below atomisation tower is opened, and air blast power is 20W, will be carbonized
Silicon powder is dispelled into atomization chamber upwards；Epoxy resin is heated to 80 DEG C of formation covering liquids, and covering liquid is sprayed by atomizer
Enter in same atomization chamber, atomizing pressure 0.5MPa.Atomization temperature is set as 40 DEG C, and nebulisation time is set as 8min, in air and mist
Under the action of changing tower temperature degree, the epoxy resin after atomization is on the surface of silicon carbide powder.After atomization, air blast power supply is closed,
Ceramic particle is collected and sieved, the powder in silicon carbide powder surface coated epoxy resin clad, the sphericity of powder are obtained
It is 0.77~0.9, the grain size of powder is 20 μm~85 μm, and the grain size of matrix is 10 μm~50 μm, and the thickness of clad is 20nm.
Embodiment 14
1, prepare raw material
Basis material is selected as ceramic silicon carbide, and coating layer material is selected as epoxy resin.
2, atomized molten cladding process prepares the powder in silicon carbide powder surface coated epoxy resin clad
The silicon carbide powder that average grain diameter is 90nm is dried into 12h in 60 DEG C of convection ovens, then by the carbon after drying
SiClx powder is put into the atomisation tower of atomising device, and outlet air switch below atomisation tower is opened, and air blast power is 20W, will be carbonized
Silicon powder is dispelled into atomization chamber upwards；Epoxy resin is heated to 80 DEG C of formation covering liquids, and covering liquid is sprayed by atomizer
Enter in same atomization chamber, atomizing pressure 1.5MPa.Atomization temperature is set as 50 DEG C, and nebulisation time is set as 10min, in air and mist
Under the action of changing tower temperature degree, the epoxy resin after atomization is on the surface of silicon carbide powder.After atomization, air blast power supply is closed,
Ceramic particle is collected and sieved, the powder in silicon carbide powder surface coated epoxy resin clad, the sphericity of powder are obtained
It is 0.76~0.91, the grain size of powder is 13 μm~80 μm, and the grain size of matrix is 6 μm~50 μm, and the thickness of clad is 25nm.
Embodiment 15
1, prepare raw material
Basis material is selected as ceramic silicon carbide, and coating layer material is selected as epoxy resin.
2, atomized molten cladding process prepares the powder in silicon carbide powder surface coated epoxy resin clad
The silicon carbide powder that average grain diameter is 90nm is dried into 12h in 60 DEG C of convection ovens, then by the carbon after drying
SiClx powder is put into the atomisation tower of atomising device, and outlet air switch below atomisation tower is opened, and air blast power is 20W, will be carbonized
Silicon powder is dispelled into atomization chamber upwards；Epoxy resin is heated to 80 DEG C of formation covering liquids, and covering liquid is sprayed by atomizer
Enter in same atomization chamber, atomizing pressure 2.5MPa.Atomization temperature is set as 50 DEG C, and nebulisation time is set as 15min, in air and mist
Under the action of changing tower temperature degree, the epoxy resin after atomization is on the surface of silicon carbide powder.After atomization, air blast power supply is closed,
Ceramic particle is collected and sieved, the powder in silicon carbide powder surface coated epoxy resin clad, the sphericity of powder are obtained
It is 0.75~0.96, the grain size of powder is 13 μm~80 μm, and the grain size of matrix is 6 μm~45 μm, and the thickness of clad is 35nm.
Embodiment 16
1, prepare raw material
Basis material is selected as hard alloy tungsten carbide, and coating layer material is selected as cobalt.
2, prepared by atomized molten cladding process coats the powder of cobalt clad on tungsten carbide powder surface
The tungsten carbide powder that average grain diameter is 200nm is dried into 12h in 60 DEG C of convection ovens, then by the carbon after drying
Change tungsten powder body to put into the atomisation tower of atomising device, open outlet air switch below atomisation tower, air blast power is 20W, will be carbonized
Tungsten powder body is dispelled into atomization chamber upwards；Cobalt is heated to 1500 DEG C of formation covering liquids, and covering liquid is sprayed into together by atomizer
In one atomization chamber, atomizing pressure 2.5MPa.Atomization temperature is set as 50 DEG C, and nebulisation time is set as 15min, in air and atomisation tower
Under the action of temperature, the cobalt after atomization is on the surface of tungsten carbide powder.After atomization, air blast power supply is closed, collects and sieves
Ceramic particle obtains coating the powder of cobalt clad on tungsten carbide powder surface, and the sphericity of powder is 0.75~0.92, powder
Grain size be 13 μm~70 μm, the grain size of matrix is 6 μm~50 μm, and the thickness of clad is 25nm.
Embodiment 17
1, prepare raw material
Basis material is selected as hard alloy tungsten carbide, and coating layer material is selected as nickel.
2, atomized molten cladding process prepares the powder in tungsten carbide powder surface cladded with nickel clad
The tungsten carbide powder that average grain diameter is 200nm is dried into 12h in 60 DEG C of convection ovens, then by the carbon after drying
Change tungsten powder body to put into the atomisation tower of atomising device, open outlet air switch below atomisation tower, air blast power is 20W, will be carbonized
Tungsten powder body is dispelled into atomization chamber upwards；Nickel is heated to 1550 DEG C of formation covering liquids, and covering liquid is sprayed into together by atomizer
In one atomization chamber, atomizing pressure 2.5MPa.Atomization temperature is set as 50 DEG C, and nebulisation time is set as 15min, in air and atomisation tower
Under the action of temperature, the nickel after atomization is on the surface of tungsten carbide powder.After atomization, air blast power supply is closed, collects and sieves
Ceramic particle, obtains the powder in tungsten carbide powder surface cladded with nickel clad, and the sphericity of powder is that the sphericity of powder is
0.78~0.90, the grain size of powder is 10 μm~80 μm, and the grain size of matrix is 6 μm~50 μm, and the thickness of clad is 20nm.
Embodiment 18
1, prepare raw material
Basis material is selected as hard alloy titanium carbide, and coating layer material is selected as cobalt.
2, prepared by atomized molten cladding process coats the powder of cobalt clad on titanium carbide powder surface
The titanium carbide powder that average grain diameter is 200nm is dried into 12h in 60 DEG C of convection ovens, then by the carbon after drying
Change titanium valve body to put into the atomisation tower of atomising device, open outlet air switch below atomisation tower, air blast power is 20W, will be carbonized
Titanium valve body is dispelled into atomization chamber upwards；Cobalt is heated to 1500 DEG C of formation covering liquids, and covering liquid is sprayed into together by atomizer
In one atomization chamber, atomizing pressure 2.5MPa.Atomization temperature is set as 50 DEG C, and nebulisation time is set as 15min, in air and atomisation tower
Under the action of temperature, the cobalt after atomization is on the surface of tungsten carbide powder.After atomization, air blast power supply is closed, collects and sieves
Ceramic particle obtains coating the powder of cobalt clad on titanium carbide powder surface, and the sphericity of powder is 0.79~0.87, powder
Grain size be 13 μm~95 μm, the grain size of matrix is 6 μm~50 μm, and the thickness of clad is 25nm.
Embodiment 19
1, prepare raw material
Basis material is selected as hard alloy titanium carbide, and coating layer material is selected as nickel.
2, atomized molten cladding process prepares the powder in titanium carbide powder surface cladded with nickel clad
The titanium carbide powder that average grain diameter is 200nm is dried into 12h in 60 DEG C of convection ovens, then by the carbon after drying
Change titanium valve body to put into the atomisation tower of atomising device, open outlet air switch below atomisation tower, air blast power is 20W, will be carbonized
Titanium valve body is dispelled into atomization chamber upwards；Nickel is heated to 1550 DEG C of formation covering liquids, and covering liquid is sprayed into together by atomizer
In one atomization chamber, atomizing pressure 2.5MPa.Atomization temperature is set as 50 DEG C, and nebulisation time is set as 15min, in air and atomisation tower
Under the action of temperature, the nickel after atomization is on the surface of tungsten carbide powder.After atomization, air blast power supply is closed, collects and sieves
Ceramic particle, obtains the powder in titanium carbide powder surface cladded with nickel clad, and the sphericity of powder is that the sphericity of powder is
0.76~0.94, the grain size of powder is 13 μm~100 μm, and the grain size of matrix is 5 μm~70 μm, and the thickness of clad is 20nm.
Embodiment 20
1, prepare raw material
Basis material is selected as the mixture of hard alloy tungsten carbide and titanium carbide, and coating layer material is selected as nickel.
2, atomized molten cladding process prepares the powder in tungsten carbide and the mixed powder surface cladded with nickel clad of titanium carbide
The mixed powder of tungsten carbide and titanium carbide that average grain diameter is 200nm is dried into 12h in 60 DEG C of convection ovens, so
The mixed powder of tungsten carbide and titanium carbide after drying is put into the atomisation tower of atomising device afterwards, opens and goes out below atomisation tower
Wind switchs, and air blast power is 20W, and the mixed powder of tungsten carbide and titanium carbide is dispelled into atomization chamber upwards；Nickel is heated to
1550 DEG C of formation covering liquids, covering liquid are sprayed by atomizer in same atomization chamber, atomizing pressure 2.5MPa.Atomization temperature
Degree is set as 50 DEG C, and nebulisation time is set as 15min, under the action of air and atomisation tower temperature, nickel after atomization in tungsten carbide and
The surface of the mixed powder of titanium carbide.After atomization, air blast power supply is closed, collects and sieves ceramic particle, obtain being carbonized
The sphericity of the powder of the mixed powder surface cladded with nickel clad of tungsten and titanium carbide, powder is 0.78~0.98, the grain of powder
Diameter is 13 μm~105 μm, and the grain size of matrix is 8 μm~50 μm, and the thickness of clad is 25nm.
Embodiment 21
1, prepare raw material
Basis material is selected as the mixture of hard alloy tungsten carbide and titanium carbide, and coating layer material is selected as cobalt.
2, prepared by atomized molten cladding process coats the powder of cobalt clad on the mixed powder surface of tungsten carbide and titanium carbide
The mixed powder of tungsten carbide and titanium carbide that average grain diameter is 200nm is dried into 12h in 60 DEG C of convection ovens, so
The mixed powder of tungsten carbide and titanium carbide after drying is put into the atomisation tower of atomising device afterwards, opens and goes out below atomisation tower
Wind switchs, and air blast power is 20W, and the mixed powder of tungsten carbide and titanium carbide is dispelled into atomization chamber upwards；Nickel is heated to
1550 DEG C of formation covering liquids, covering liquid are sprayed by atomizer in same atomization chamber, atomizing pressure 2.5MPa.Atomization temperature
Degree is set as 50 DEG C, and nebulisation time is set as 15min, under the action of air and atomisation tower temperature, cobalt after atomization in tungsten carbide and
The surface of the mixed powder of titanium carbide.After atomization, air blast power supply is closed, collects and sieves ceramic particle, obtain being carbonized
The mixed powder surface of tungsten and titanium carbide coats the powder of cobalt clad, and the sphericity of powder is 0.8~0.94, the grain size of powder
It it is 18 μm~110 μm, the grain size of matrix is 10 μm~80 μm, and the thickness of clad is 30nm.
Embodiment 22
1, prepare raw material
Basis material is selected as the mixture of hard alloy tungsten carbide and titanium carbide, and coating layer material is selected as cobalt and nickel.
2, prepared by atomized molten cladding process coats cobalt and nickel coated layer on the mixed powder surface of tungsten carbide and titanium carbide
Powder
The mixed powder of tungsten carbide and titanium carbide that average grain diameter is 200nm is dried into 12h in 60 DEG C of convection ovens, so
The mixed powder of tungsten carbide and titanium carbide after drying is put into the atomisation tower of atomising device afterwards, opens and goes out below atomisation tower
Wind switchs, and air blast power is 20W, and the mixed powder of tungsten carbide and titanium carbide is dispelled into atomization chamber upwards；Cobalt and nickel heating
To 1450 DEG C of formation covering liquids, covering liquid is sprayed by atomizer in same atomization chamber, atomizing pressure 2.5MPa.Atomization
Temperature is set as 50 DEG C, and nebulisation time is set as 15min, and under the action of air and atomisation tower temperature, the cobalt and nickel after atomization are in carbon
Change the surface of the mixed powder of tungsten and titanium carbide.After atomization, air blast power supply is closed, collects and sieves ceramic particle, obtain
The powder of cobalt and nickel coated layer is coated on the mixed powder surface of tungsten carbide and titanium carbide, the sphericity of powder is 0.80~
0.91, the grain size of powder is 10 μm~80 μm, and the grain size of matrix is 3 μm~50 μm, and the thickness of clad is 15nm.
Embodiment 23
1, prepare raw material
Basis material is selected as refractory metal material tungsten, and coating layer material is selected as nickel.
2, atomized molten cladding process prepares the powder that nickel coated layer is covered in tungsten powder body surface bread
The tungsten powder body that average grain diameter is 200nm is dried into 12h in 60 DEG C of convection ovens, then by the tungsten powder body after drying
It puts into the atomisation tower of atomising device, opens outlet air switch below atomisation tower, air blast power is 20W, and tungsten powder body is blown upwards
It is dissipated in atomization chamber；Nickel is heated to 1550 DEG C of formation covering liquids, covering liquid is sprayed by atomizer in same atomization chamber, mist
Change pressure is 2.5MPa.Atomization temperature is set as 50 DEG C, and nebulisation time is set as 15min, under the action of air and atomisation tower temperature,
Nickel after atomization is on the surface of tungsten powder body.After atomization, air blast power supply is closed, collects and sieves ceramic particle, obtain in tungsten
Powder surface coats the powder of nickel coated layer, and the sphericity of powder is 0.81~0.91, and the grain size of powder is 13 μm~80 μm, base
The grain size of body is 6 μm~50 μm, and the thickness of clad is 20nm.
Embodiment 24
1, prepare raw material
Basis material is selected as refractory metal material tungsten, and coating layer material is selected as tin.
2, atomized molten cladding process prepares the powder that tin clad is covered in tungsten powder body surface bread
The tungsten powder body that average grain diameter is 200nm is dried into 12h in 60 DEG C of convection ovens, then by the tungsten powder body after drying
It puts into the atomisation tower of atomising device, opens outlet air switch below atomisation tower, air blast power is 20W, and tungsten powder body is blown upwards
It is dissipated in atomization chamber；Tin is heated to 250 DEG C of formation covering liquids, covering liquid is sprayed by atomizer in same atomization chamber, mist
Change pressure is 2.5MPa.Atomization temperature is set as 50 DEG C, and nebulisation time is set as 15min, under the action of air and atomisation tower temperature,
Tin after atomization is on the surface of tungsten powder body.After atomization, air blast power supply is closed, collects and sieves ceramic particle, obtain in tungsten
Powder surface coats the powder of tin clad, and the sphericity of powder is 0.75~0.91, and the grain size of powder is 13 μm~90 μm, base
The grain size of body is 7 μm~50 μm, and the thickness of clad is 20nm.
Embodiment 25
1, prepare raw material
Basis material is selected as refractory metal material tungsten, and coating layer material is selected as lead.
2, atomized molten cladding process prepares the powder that sheath coating is covered in tungsten powder body surface bread
The tungsten powder body that average grain diameter is 200nm is dried into 12h in 60 DEG C of convection ovens, then by the tungsten powder body after drying
It puts into the atomisation tower of atomising device, opens outlet air switch below atomisation tower, air blast power is 20W, and tungsten powder body is blown upwards
It is dissipated in atomization chamber；Lead is heated to 270 DEG C of formation covering liquids, covering liquid is sprayed by atomizer in same atomization chamber, mist
Change pressure is 2.5MPa.Atomization temperature is set as 50 DEG C, and nebulisation time is set as 15min, under the action of air and atomisation tower temperature,
Lead after atomization is on the surface of tungsten powder body.After atomization, air blast power supply is closed, collects and sieves ceramic particle, obtain in tungsten
Powder surface coats the powder of sheath coating, and the sphericity of powder is 0.85~1, and the grain size of powder is 15 μm~120 μm, matrix
Grain size be 8 μm~70 μm, the thickness of clad is 28nm.
Embodiment 26
1, prepare raw material
Basis material is selected as refractory metal material platinum, and coating layer material is selected as tin.
2, atomized molten cladding process prepares the powder that tin clad is covered in platinum powder body surface bread
The platinum powder body that average grain diameter is 200nm is dried into 12h in 60 DEG C of convection ovens, then by the platinum powder body after drying
It puts into the atomisation tower of atomising device, opens outlet air switch below atomisation tower, air blast power is 20W, and platinum powder body is blown upwards
It is dissipated in atomization chamber；Tin is heated to 250 DEG C of formation covering liquids, covering liquid is sprayed by atomizer in same atomization chamber, mist
Change pressure is 2.5MPa.Atomization temperature is set as 50 DEG C, and nebulisation time is set as 15min, under the action of air and atomisation tower temperature,
Tin after atomization is on the surface of tungsten powder body.After atomization, air blast power supply is closed, collects and sieves ceramic particle, obtain in platinum
Powder surface coats the powder of tin clad, and the sphericity of powder is 0.75~0.95, and the grain size of powder is 30 μm~120 μm,
The grain size of matrix is 10 μm~70 μm, and the thickness of clad is 15nm.
Embodiment 27
1, prepare raw material
Basis material is selected as refractory metal material tungsten, and coating layer material is selected as epoxy resin.
2, atomized molten cladding process prepares the powder in tungsten powder body surface face coated epoxy resin clad
The tungsten powder body that average grain diameter is 200nm is dried into 12h in 60 DEG C of convection ovens, then by the platinum powder body after drying
It puts into the atomisation tower of atomising device, opens outlet air switch below atomisation tower, air blast power is 20W, and tungsten powder body is blown upwards
It is dissipated in atomization chamber；Epoxy resin is heated to 70 DEG C of formation covering liquids, and covering liquid is sprayed into same atomization chamber by atomizer
In, atomizing pressure 2.5MPa.Atomization temperature is set as 50 DEG C, and nebulisation time is set as 15min, in the work of air and atomisation tower temperature
Under, the epoxy resin after atomization is on the surface of tungsten powder body.After atomization, air blast power supply is closed, collect and sieves ceramics
Grain obtains the powder in tungsten powder body surface face coated epoxy resin clad, and the sphericity of powder is 0.76~0.98, the grain of powder
Diameter is 20 μm~90 μm, and the grain size of matrix is 6 μm~65 μm, and the thickness of clad is 15nm.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (10)
1. a kind of powder, which is characterized in that the powder includes matrix and clad, and the clad is coated on described matrix
Surface；
Described matrix is one or more in ceramic matrix, hard alloy substrate and refractory metal basal body；
The clad is one or more in organic binder, inorganic binder and low-melting-point metal.
2. powder according to claim 1, which is characterized in that the sphericity of the powder is 0.75~1；
The grain size of the powder is 5 μm~160 μm.
3. powder according to claim 1, which is characterized in that the grain size of described matrix is 1 μm~150 μm；
The thickness of the clad is 10nm~10 μm.
4. powder according to claim 1, which is characterized in that the ceramic matrix is oxide ceramics and/or non-oxide
Object ceramics；
The hard alloy is one or more in tungsten carbide, titanium carbide and ramet；
The refractory metal basal body is one or more in tungsten, platinum, titanium and chromium；
The oxide ceramics is aluminium oxide and/or zirconium oxide；
The non-oxide ceramics are silicon nitride, boron nitride, diamond, silicon carbide, aluminium nitride, titanium nitride, titanium carbonitride, carbonization
It is one or more in boron, titanium diboride and apatite.
5. powder according to claim 1, which is characterized in that the organic binder is polyamide, polymethylacrylic acid
It is one or more in methyl esters and epoxy resin；
The inorganic binder is one or more in calcium oxide, magnesia, zinc oxide and yttrium oxide；
The low-melting-point metal is one or more in cobalt, nickel, tin and lead.
6. a kind of preparation method of powder, which is characterized in that include the following steps：
Matrix is suspended in atomization chamber, covering liquid is added into the atomization chamber and the covering liquid is made to be atomized, after atomization
The surface that covering liquid is coated on described matrix forms clad, obtains the powder；
Wherein, the covering liquid is heated to melting and is made by covering material；
Described matrix is one or more in ceramic matrix, hard alloy substrate and refractory metal basal body；
The clad is one or more in organic binder, inorganic binder and low-melting-point metal.
7. preparation method according to claim 6, which is characterized in that the atomization is pressurizing atomizing；
The pressure of the pressurizing atomizing is 0.5MPa~10MPa；
The time of the pressurizing atomizing is 5min~100min.
8. preparation method according to claim 6, which is characterized in that the temperature of the atomization is 20 DEG C~200 DEG C.
9. preparation method according to claim 6, which is characterized in that it is described matrix is suspended in atomization chamber before, also
Including：Described matrix is dried.
10. described in powder or claim 6 to claim 9 any one described in claim 1 to claim 5 any one
Application of the powder made from preparation method in increasing material manufacturing.
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