CN106298136A - A kind of NdFeB/SmCo of thermal deformation method preparation doping PrCu alloy5the method of composite permanent magnet - Google Patents
A kind of NdFeB/SmCo of thermal deformation method preparation doping PrCu alloy5the method of composite permanent magnet Download PDFInfo
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- CN106298136A CN106298136A CN201610885683.2A CN201610885683A CN106298136A CN 106298136 A CN106298136 A CN 106298136A CN 201610885683 A CN201610885683 A CN 201610885683A CN 106298136 A CN106298136 A CN 106298136A
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- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 120
- 238000000034 method Methods 0.000 title claims abstract description 52
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 title claims abstract description 46
- 239000002131 composite material Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 102
- 239000000956 alloy Substances 0.000 claims abstract description 50
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 31
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 19
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 19
- 238000000498 ball milling Methods 0.000 claims description 25
- 238000005245 sintering Methods 0.000 claims description 22
- 238000005266 casting Methods 0.000 claims description 20
- 238000003723 Smelting Methods 0.000 claims description 16
- 238000000713 high-energy ball milling Methods 0.000 claims description 16
- 239000000725 suspension Substances 0.000 claims description 16
- 238000007731 hot pressing Methods 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 13
- 239000011812 mixed powder Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 12
- 238000010791 quenching Methods 0.000 claims description 12
- 230000000171 quenching effect Effects 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 9
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000011049 filling Methods 0.000 claims description 6
- 229910000743 fusible alloy Inorganic materials 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 239000010439 graphite Substances 0.000 claims description 6
- 238000009413 insulation Methods 0.000 claims description 6
- 230000005291 magnetic effect Effects 0.000 abstract description 29
- 238000010168 coupling process Methods 0.000 abstract description 6
- 238000005859 coupling reaction Methods 0.000 abstract description 6
- 230000003993 interaction Effects 0.000 abstract description 4
- 239000000696 magnetic material Substances 0.000 abstract description 2
- 239000012071 phase Substances 0.000 description 23
- 230000000052 comparative effect Effects 0.000 description 9
- 238000002156 mixing Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- RZJQYRCNDBMIAG-UHFFFAOYSA-N [Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Zn].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn] Chemical class [Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Cu].[Zn].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Ag].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn].[Sn] RZJQYRCNDBMIAG-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
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- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005662 electromechanics Effects 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 239000006247 magnetic powder Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
-
- 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
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/10—Sintering only
- B22F3/105—Sintering only by using electric current other than for infrared radiant energy, laser radiation or plasma ; by ultrasonic bonding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/0273—Imparting anisotropy
Abstract
A kind of NdFeB/SmCo of thermal deformation method preparation doping PrCu alloy5The method of composite permanent magnet, belongs to technical field of magnetic materials.It is 2～15wt.% that PrCu alloy powder for doping accounts for the weight ratio of total powder.The deflection of built-up magnet is 60%～90%.SPS technomania deformation method is used to prepare, the NdFeB/SmCo of doping PrCu alloy5Thermal deformation composite rare earth permanent magnet body, during thermal deformation, PrCu phase is as interface phase, can completely cut off two Hard Magnetic phases, reduces counterdiffusion, weaken biphase between exchange-coupling interaction, improve coercivity；During thermal deformation, PrCu phase is dispersed in grain boundaries after liquefying, it is also possible to coordinate biphase thermal deformation, promotes biphase thermal deformation；The NdFeB/SmCo of the multiple nanocrystalline doping PrCu alloy obtained5Built-up magnet has good magnetic property, heat stability, decay resistance and mechanical property.
Description
Technical field
The present invention is a kind of hot-pressing thermal deformation method preparation doping PrCu alloy using discharge plasma sintering technique
NdFeB/SmCo5The method of composite rare earth permanent magnet body, belongs to technical field of magnetic materials.
Background technology
Sintered NdFeB rare-earth permanent magnet is the permanent magnet material that magnetic is the strongest up to now, be widely used in electronics, electromechanics,
The numerous areas such as instrument and medical treatment, are with fastest developing speed in the world today, the permanent magnet material that market prospect is best.And NdFeB type magnetic
Body has high saturation magnetization, low heat stability (under high temperature, coercivity is low), and its Curie temperature is about 580K, this limit
Make its application at high temperature.Along with electric automobile and the fast development of hybrid vehicle, it is desirable to permanent magnet operating temperature
More than 200 DEG C, therefore, the high-temp magnetic performance of NdFeB magnet is had higher requirement.
In order to better meet the application demand to high-performance high temperature permanent magnet, researcher uses multiple method to carry out
Unremitting effort.Particularly propose a kind of method preparing Hard Magnetic/Hard Magnetic type composite rare earth permanent magnet body.Because it is each type of
Single-phase permanent magnet is all respectively arranged with its Pros and Cons.Such as, NdFeB type magnet has high magnetic property, but uses temperature relatively low；And
The saturation magnetization of SmCo type magnet and magnetic energy product are less than NdFeB magnet, but have high Curie temperature and heat stability, suitable
Conjunction is applied to high-temperature field.Therefore, if both respective advantages to be combined preparation NdFeB/SmCo5Type composite permanet magnet
Body, it is possible to obtain have the composite permanent magnet of relatively high magnetic characteristics and good thermal stability concurrently.Both at home and abroad this has been carried out preliminary study.
Dapeng Wang and Shen et al. is by by NdFeB powder and SmCo5After powder mixing, hot pressed sintering prepares NdFeB/SmCo5
Isotropic built-up magnet, magnetic energy product reaches 14MGOe, and built-up magnet presents the magnetic feature of single-phase permanent magnet.Inner Mongol section
Skill university is to NdFeB/SmCo5National inventing patent (patent No. CN103390477A) declared by built-up magnet, but, its patent
In do not provide any magnetic property data.There is bigger difficulty in the preparation of current this built-up magnet: one, two single-phase permanent magnets
Preparation technology can not be mated completely；Two, it is susceptible to diffuse into one another between two kinds of permanent magnets under high temperature, produces and there is easy basal plane
The product of magnetocrystalline anisotropy, such as Sm2Fe14B and NdCo5, cause coercivity seriously to reduce, it is impossible to meet high-temperature field to magnet
Use requirement.In the recent period, Fangming Wan of Peking University et al. have developed low melting point of adulterating in single-phase NdFeB magnet
PrCu liquid phase alloy, it is thus achieved that the magnet of high-coercive force.Its coercitive increase is relevant with the change of grain boundary layer.Current research table
Bright, in traditional NdFeB magnet, its Grain-Boundary Phase is not non-magnetic phase, has ferromagnetic, and its intercrystalline exists exchange coupling
Cooperation is used.Therefore, once magnetic reversal farmland is at defect or sharp-pointed edge's forming core, due to the extension on magnetic reversal farmland, magnetic reversal
Process is easy to carry out.But, after the nonmagnetic PrCu alloy that adulterates, that grain boundaries defines thickness and that magnetic is more weak border
Layer, is gone magnetic coupling between crystal grain larger, so in the more difficult continuity of intercrystalline magnetization reversal.Further, since crystal grain
It is more smooth that border becomes, and also counteracts that the forming core on magnetic reversal farmland.Therefore, the single-phase NdFeB magnet of doping PrCu alloy obtains
High coercivity.
The method of above-mentioned doping PrCu alloy has been obtained for good result, such as file in single-phase NdFeB magnet
CN102248157A discloses a kind of method spreading PrCu alloy in magnetic powder, but at Hard Magnetic/Hard Magnetic type two-phase built-up magnet
In the most do not carry out correlational study and report.Therefore, the application proposes a kind of employing thermal deformation method preparation doping PrCu alloy
NdFeB/SmCo5The new method of two-phase composite rare earth permanent magnet body.
Original NdFeB/SmCo5Built-up magnet in thermal deformation process, NdFeB and SmCo under high temperature5Exist between biphase
Some diffusing phenomenon, produce some dephasigns and seriously reduce coercivity.It addition, NdFeB and SmCo5Between there is deformation
Phenomenon, SmCo5It is more difficult to carry out than the deformation of NdFeB phase, therefore SmCo in thermal deformation process5Micro-crack the most easily occurs.As
Fruit is at NdFeB and SmCo5Being mixed into the liquid phase alloy PrCu powder of low melting point when of mixed powder, during thermal deformation, PrCu phase is done
For interface phase, two Hard Magnetic phases can be completely cut off, reduce counterdiffusion, and weaken biphase between exchange-coupling interaction, improve coercive
Power；During thermal deformation, PrCu phase is dispersed in grain boundaries after liquefying simultaneously, it is also possible to coordinates biphase thermal deformation, finally promotees
Enter biphase thermal deformation and obtain good deformation texture.Concrete grammar is at NdFeB and SmCo5It is mixed into PrCu powder when of mixed powder,
Then the NdFeB/SmCo of discharging plasma sintering equipment (SPS) hot-pressing thermal deformation preparation doping PrCu alloy is used5Compound dilute
Soil permanent magnet.SPS has high pressure, low temperature, quickly sinters advantage, it is possible to inhibiting grain growth, reduces the mutual expansion of two kinds of magnets
Dissipate, and the densification simultaneously of two distinct types of magnet can be made under conditions of high pressure, low temperature, thus obtain high-coercive force
Nanocrystalline NdFeB/SmCo5Built-up magnet.Owing to being doped with the liquid phase P rCu alloy of low melting point, the thermal deformation therefore obtained
Built-up magnet has good deformation texture and high coercivity.This NEW TYPE OF COMPOSITE magnet has the advantage of two kinds of Hard Magnetic phases,
The range of application of permanent magnet material can be widened.
Summary of the invention
It is an object of the invention to provide a kind of NdFeB/SmCo using SPS thermal deformation method preparation doping PrCu alloy5Multiple
The method closing rare-earth permanent magnet.
The NdFeB/SmCo of doping PrCu alloy5Composite rare earth permanent magnet body, it is characterised in that in composite rare earth permanent magnet body
It is 2～15wt.%, NdFeB and SmCo that PrCu alloy for doping accounts for gross weight ratio5Mass ratio be not intended to, preferably 1:4
～4:1；The deflection of built-up magnet is 60%～90%.In PrCu alloy, the molar content of Pr is preferably 10～90%.
The present invention is a kind of NdFeB/SmCo using SPS technomania deformation method preparation doping PrCu alloy5Compound rare-earth
The method of permanent magnet, the method mainly comprises the following steps:
(1) melting, NdFeB is the nanocrystalline NdFeB belt flake purchased；SmCo5Ingot casting uses suspension smelting furnace system
Standby；PrCu low-melting alloy uses suspension smelting furnace to prepare；
(2) grind NdFeB powder, NdFeB thin slice is ground, cross 200 mesh sieve and obtain NdFeB fine powder；
(3) SmCo is prepared5Powder, uses high-energy ball milling method by SmCo5Ingot casting ball milling becomes SmCo5Amorphous powder；
(4) preparing PrCu powder, PrCu alloy is carried out fast quenching and obtains fast quenching thin strap, then employing high-energy ball milling method will
PrCu strip ball milling becomes PrCu amorphous powder；
(5) mixed powder, uses ball-milling method by NdFeB powder, SmCo5Powder and PrCu powder mix powder in proportion；
(6) powder is die-filling, is loaded in WC sintered-carbide die by the composite powder of mix homogeneously；
(7) hot pressing built-up magnet, use discharging plasma sintering equipment, vacuum, pressure 450～500MPa, 650～
680 DEG C and insulation 30 seconds under conditions of hot pressed sintering, it is thus achieved that the NdFeB/ of isotropic nanocrystalline doping PrCu alloy
SmCo5Built-up magnet；
(8) thermal deformation built-up magnet, by hot pressing built-up magnet dress graphite jig, uses discharging plasma sintering equipment,
At vacuum, pressure 30～60MPa, heat distortion temperature is 700～850 DEG C, and deflection is 60～90%, it is thus achieved that anisotropic receive
The NdFeB/SmCo of the doping PrCu alloy of meter Jing5Composite permanent magnet；
Beneficial effects of the present invention
(1) relative to the NdFeB/SmCo of undoped p PrCu alloy5The mode of thermal deformation composite rare earth permanent magnet body, doping
The NdFeB/SmCo of PrCu alloy5During thermal deformation composite permanent magnet, thermal deformation and annealing heat treatment, PrCu phase is as boundary
Face phase, can completely cut off two Hard Magnetic phases, reduces counterdiffusion, weaken biphase between exchange-coupling interaction, improve coercivity；
(2) during thermal deformation, PrCu phase is dispersed in grain boundaries after liquefying, and can coordinate biphase thermal deformation, finally
Promote that biphase thermal deformation obtains good deformation texture；
(3) NdFeB/SmCo of the nanocrystalline doping PrCu alloy obtained5Composite permanent magnet, has good magnetic
Energy, heat stability, decay resistance and mechanical property.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the invention will be further described, but protection scope of the present invention is not limited only to down
State embodiment.
Embodiment 1
(1) melting.The nanocrystalline NdFeB belt flake that NdFeB purchases；SmCo5Ingot casting uses suspension smelting furnace to prepare；
Pr10Cu90Low-melting alloy uses suspension smelting furnace to prepare；
(2) NdFeB powder is ground.NdFeB thin slice is ground, crosses 200 mesh sieve and obtain NdFeB fine powder；
(3) SmCo is prepared5Powder.Use high-energy ball milling method by SmCo5Ingot casting ball milling becomes SmCo5Amorphous powder；
(4) PrCu powder is prepared.PrCu alloy being carried out fast quenching and obtains fast quenching thin strap, then employing high-energy ball milling method will
PrCu strip ball milling becomes PrCu amorphous powder；
(5) mixed powder.Use ball-milling method by NdFeB powder (80wt.%), SmCo5Powder (20wt.%) and the mixing of PrCu powder are all
Even, PrCu powder accounts for the 2wt.% of gross weight；
(6) powder is die-filling.The composite powder of mix homogeneously is loaded in WC sintered-carbide die；
(7) hot pressing built-up magnet.Use discharging plasma sintering equipment, in vacuum, pressure 450MPa, 680 DEG C and insulation
Hot pressed sintering under conditions of 30 seconds, it is thus achieved that the NdFeB/SmCo of isotropic nanocrystalline doping PrCu alloy5Built-up magnet；
(8) thermal deformation built-up magnet.Hot pressing built-up magnet is loaded in graphite jig, use discharge plasma sintering to set
Standby, at vacuum, pressure 60MPa, heat distortion temperature is 700 DEG C, and deflection is 60%, it is thus achieved that the doping that anisotropy is nanocrystalline
The NdFeB/SmCo of PrCu alloy5Composite permanent magnet.
Comparative example 1
(1) melting.NdFeB is the nanocrystalline NdFeB belt flake purchased；SmCo5Ingot casting uses suspension smelting furnace system
Standby；
(2) NdFeB powder is ground.NdFeB thin slice is ground, crosses 200 mesh sieve and obtain NdFeB fine powder；
(3) SmCo is prepared5Powder.Use high-energy ball milling method by SmCo5Ingot casting ball milling becomes SmCo5Amorphous powder；
(4) mixed powder.Use ball-milling method by NdFeB powder (80wt.%) and SmCo5Powder (20wt.%) mix homogeneously；
(5) remaining step is with reference to embodiment 1.
Embodiment 2
(1) melting.NdFeB is the nanocrystalline NdFeB belt flake purchased；SmCo5Ingot casting uses suspension smelting furnace system
Standby；Pr30Cu70Low-melting alloy uses suspension smelting furnace to prepare；
(2) NdFeB powder is ground.NdFeB thin slice is ground, crosses 200 mesh sieve and obtain NdFeB fine powder；
(3) SmCo is prepared5Powder.Use high-energy ball milling method by SmCo5Ingot casting ball milling becomes SmCo5Amorphous powder；
(4) PrCu powder is prepared.PrCu alloy being carried out fast quenching and obtains fast quenching thin strap, then employing high-energy ball milling method will
PrCu strip ball milling becomes PrCu amorphous powder；
(5) mixed powder.Use ball-milling method by NdFeB powder (60wt.%), SmCo5Powder (40wt.%) and the mixing of PrCu powder are all
Even, PrCu powder accounts for the 6wt.% of gross weight；
(6) powder is die-filling.The composite powder of mix homogeneously is loaded in WC sintered-carbide die；
(7) hot pressing built-up magnet.Use discharging plasma sintering equipment, in vacuum, pressure 480MPa, 650 DEG C and insulation
Hot pressed sintering under conditions of 30 seconds, it is thus achieved that the NdFeB/SmCo of isotropic nanocrystalline doping PrCu alloy5Built-up magnet；
(8) thermal deformation built-up magnet.Hot pressing built-up magnet is loaded in graphite jig, use discharge plasma sintering to set
Standby, at vacuum, pressure 50MPa, heat distortion temperature is 750 DEG C, and deflection is 70%, it is thus achieved that the doping that anisotropy is nanocrystalline
The NdFeB/SmCo of PrCu alloy5Composite permanent magnet.
Comparative example 2
(1) melting.NdFeB is the nanocrystalline NdFeB belt flake purchased；SmCo5Ingot casting uses suspension smelting furnace system
Standby；
(2) NdFeB powder is ground.NdFeB thin slice is ground, crosses 200 mesh sieve and obtain NdFeB fine powder；
(3) SmCo is prepared5Powder.Use high-energy ball milling method by SmCo5Ingot casting ball milling becomes SmCo5Amorphous powder；
(4) mixed powder.Use ball-milling method by NdFeB powder (60wt.%) and SmCo5Powder (40wt.%) mix homogeneously；
(5) remaining step is with reference to embodiment 2.
Embodiment 3
(1) melting.NdFeB is the nanocrystalline NdFeB belt flake purchased；SmCo5Ingot casting uses suspension smelting furnace system
Standby；Pr60Cu40Low-melting alloy uses suspension smelting furnace to prepare；
(2) NdFeB powder is ground.NdFeB thin slice is ground, crosses 200 mesh sieve and obtain NdFeB fine powder；
(3) SmCo is prepared5Powder.Use high-energy ball milling method by SmCo5Ingot casting ball milling becomes SmCo5Amorphous powder；
(4) PrCu powder is prepared.PrCu alloy being carried out fast quenching and obtains fast quenching thin strap, then employing high-energy ball milling method will
PrCu strip ball milling becomes PrCu amorphous powder；
(5) mixed powder.Use ball-milling method by NdFeB powder (40wt.%), SmCo5Powder (60wt.%) and the mixing of PrCu powder are all
Even, PrCu powder accounts for the 10wt.% of gross weight；
(6) powder is die-filling.The composite powder of mix homogeneously is loaded in WC sintered-carbide die；
(7) hot pressing built-up magnet.Use discharging plasma sintering equipment, in vacuum, pressure 500MPa, 680 DEG C and insulation
Hot pressed sintering under conditions of 30 seconds, it is thus achieved that the NdFeB/SmCo of isotropic nanocrystalline doping PrCu alloy5Built-up magnet；
(8) thermal deformation built-up magnet.Hot pressing built-up magnet is loaded in graphite jig, use discharge plasma sintering to set
Standby, at vacuum, pressure 40MPa, heat distortion temperature is 800 DEG C, and deflection is 80%, it is thus achieved that the doping that anisotropy is nanocrystalline
The NdFeB/SmCo of PrCu alloy5Composite permanent magnet.
Comparative example 3
(1) melting.NdFeB is the nanocrystalline NdFeB belt flake purchased；SmCo5Ingot casting uses suspension smelting furnace system
Standby；
(2) NdFeB powder is ground.NdFeB thin slice is ground, crosses 200 mesh sieve and obtain NdFeB fine powder；
(3) SmCo is prepared5Powder.Use high-energy ball milling method by SmCo5Ingot casting ball milling becomes SmCo5Amorphous powder；
(4) mixed powder.Use ball-milling method by NdFeB powder (40wt.%) and SmCo5Powder (60wt.%) mix homogeneously；
(5) remaining step is with reference to embodiment 3.
Embodiment 4
(1) melting.NdFeB is the nanocrystalline NdFeB belt flake purchased；SmCo5Ingot casting uses suspension smelting furnace system
Standby；Pr90Cu10Low-melting alloy uses suspension smelting furnace to prepare；
(2) NdFeB powder is ground.NdFeB thin slice is ground, crosses 200 mesh sieve and obtain NdFeB fine powder；
(3) SmCo is prepared5Powder.Use high-energy ball milling method by SmCo5Ingot casting ball milling becomes SmCo5Amorphous powder；
(4) PrCu powder is prepared.PrCu alloy being carried out fast quenching and obtains fast quenching thin strap, then employing high-energy ball milling method will
PrCu strip ball milling becomes PrCu amorphous powder；
(5) mixed powder.Use ball-milling method by NdFeB powder (20wt.%), SmCo5Powder (80wt.%) and the mixing of PrCu powder are all
Even, PrCu powder accounts for the 15wt.% of gross weight；
(6) powder is die-filling.The composite powder of mix homogeneously is loaded in WC sintered-carbide die；
(7) hot pressing built-up magnet.Use discharging plasma sintering equipment, in vacuum, pressure 500MPa, 680 DEG C and insulation
Hot pressed sintering under conditions of 30 seconds, it is thus achieved that the NdFeB/SmCo of isotropic nanocrystalline doping PrCu alloy5Built-up magnet；
(8) thermal deformation built-up magnet.Hot pressing built-up magnet is loaded in graphite jig, use discharge plasma sintering to set
Standby, at vacuum, pressure 50MPa, heat distortion temperature is 850 DEG C, and deflection is 90%, it is thus achieved that the doping that anisotropy is nanocrystalline
The NdFeB/SmCo of PrCu alloy5Composite permanent magnet.
Comparative example 4
(1) melting.NdFeB is the nanocrystalline NdFeB belt flake purchased；SmCo5Ingot casting uses suspension smelting furnace system
Standby；
(2) NdFeB powder is ground.NdFeB thin slice is ground, crosses 200 mesh sieve and obtain NdFeB fine powder；
(3) SmCo is prepared5Powder.Use high-energy ball milling method by SmCo5Ingot casting ball milling becomes SmCo5Amorphous powder；
(4) mixed powder.Use ball-milling method by NdFeB powder (20wt.%) and SmCo5Powder (80wt.%) mix homogeneously；
(5) remaining step is with reference to embodiment 4.
Under table 1 room temperature (20 DEG C), embodiment and the magnetic property of comparative example and density contrast
| Performance | Coercivity (kOe) | Remanent magnetism (kGs) | Density (g/cm3) |
| Embodiment 1 | 12.32 | 10.33 | 7.55 |
| Comparative example 1 | 9.63 | 10.63 | 7.74 |
| Embodiment 2 | 11.75 | 8.23 | 7.90 |
| Comparative example 2 | 6.23 | 8.58 | 7.88 |
| Embodiment 3 | 11.38 | 7.13 | 8.05 |
| Comparative example 3 | 7.32 | 7.96 | 8.02 |
| Embodiment 4 | 13.65 | 6.55 | 8.18 |
| Comparative example 4 | 10.53 | 7.35 | 8.16 |
Sum up
The present invention utilizes discharge plasma sintering to be prepared for the NdFeB/SmCo of a kind of PrCu alloy that adulterates5Compound rare-earth is forever
Magnet.NdFeB/SmCo relative to undoped p PrCu alloy5The mode of thermal deformation composite rare earth permanent magnet body, adulterate PrCu alloy
NdFeB/SmCo5Thermal deformation composite rare earth permanent magnet body, during thermal deformation, PrCu phase is as interface phase, can completely cut off two
Hard Magnetic phase, reduce counterdiffusion, weaken biphase between exchange-coupling interaction, improve coercivity；PrCu during thermal deformation
It is dispersed in grain boundaries mutually, it is also possible to coordinate biphase thermal deformation, promote biphase thermal deformation after liquefaction；Doping PrCu alloy
NdFeB/SmCo5Thermal deformation built-up magnet is than unadulterated NdFeB/SmCo5The performance of thermal deformation built-up magnet significantly improves.Obtain
The NdFeB/SmCo of the nanocrystalline doping PrCu alloy obtained5Built-up magnet has good magnetic property, heat stability, corrosion resistance
Energy and mechanical property.
Claims (5)
1. the NdFeB/SmCo of doping PrCu alloy5Composite rare earth permanent magnet body, it is characterised in that use in composite rare earth permanent magnet body
It is 2～15wt.%, NdFeB and SmCo that PrCu alloy in doping accounts for gross weight ratio5Mass ratio be not intended to.
2. according to the NdFeB/SmCo of the doping PrCu alloy described in claim 15Composite rare earth permanent magnet body, it is characterised in that
NdFeB and SmCo5Mass ratio be 1:4～4:1.
3. according to the NdFeB/SmCo of the doping PrCu alloy described in claim 15Composite rare earth permanent magnet body, it is characterised in that multiple
The deflection closing magnet is 60%～90%.
4. according to the NdFeB/SmCo of the doping PrCu alloy described in claim 15Composite rare earth permanent magnet body, it is characterised in that
In PrCu alloy, the molar content of Pr element is 10～90%.
5. the NdFeB/SmCo of preparation doping PrCu alloy described in claim 15The method of composite rare earth permanent magnet body, its feature
It is, uses SPS technomania deformation method to prepare, mainly comprise the following steps:
(1) melting, NdFeB is the nanocrystalline NdFeB belt flake purchased；SmCo5Ingot casting uses suspension smelting furnace to prepare；
PrCu low-melting alloy uses suspension smelting furnace to prepare；
(2) grind NdFeB powder, NdFeB thin slice is ground, cross 200 mesh sieve and obtain NdFeB fine powder；
(3) SmCo is prepared5Powder, uses high-energy ball milling method by SmCo5Ingot casting ball milling becomes SmCo5Amorphous powder；
(4) prepare PrCu powder, PrCu alloy is carried out fast quenching and obtains fast quenching thin strap, then use high-energy ball milling method that PrCu is thin
PrCu amorphous powder is worn in dribbling；
(5) mixed powder, uses ball-milling method by NdFeB powder, SmCo5Powder and PrCu powder mix powder in proportion；
(6) powder is die-filling, is loaded in WC sintered-carbide die by the composite powder of mix homogeneously；
(7) hot pressing built-up magnet, uses discharging plasma sintering equipment, vacuum, pressure 450～500MPa, 650～680 DEG C
With insulation 30 seconds under conditions of hot pressed sintering, it is thus achieved that the NdFeB/SmCo of isotropic nanocrystalline doping PrCu alloy5Multiple
Close magnet；
(8) thermal deformation built-up magnet, by hot pressing built-up magnet dress graphite jig, uses discharging plasma sintering equipment, very
Empty, pressure 30～60MPa, heat distortion temperature is 700～850 DEG C, and deflection is 60～90%, it is thus achieved that anisotropic nanocrystalline
The NdFeB/SmCo of doping PrCu alloy5Composite permanent magnet.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107845470A (en) * | 2017-12-10 | 2018-03-27 | 武汉朋谊科技有限公司 | A kind of printer permanent magnet |
| CN108987017A (en) * | 2018-07-23 | 2018-12-11 | 浙江东阳东磁稀土有限公司 | A kind of no heavy rare earth sintered NdFeB |
| CN109972027A (en) * | 2018-12-24 | 2019-07-05 | 南昌航空大学 | A method of mutually adding preparation anisotropy CeFeB permanent-magnet alloy by low melting point PrCu intergranular |
| CN110098026A (en) * | 2018-01-28 | 2019-08-06 | 蒋盼盼 | A kind of preparation method of rare-earth permanent magnet |
| CN110895984A (en) * | 2018-09-12 | 2020-03-20 | 河南科技大学 | Strong texture SmCo5Base nano composite permanent magnetic material and its preparation method |
| CN111863369A (en) * | 2019-04-29 | 2020-10-30 | 广东省稀有金属研究所 | Magnetic binder and preparation method thereof, and preparation method of composite permanent magnetic material |
| CN113593874A (en) * | 2021-06-30 | 2021-11-02 | 中国计量大学 | Preparation method of high-performance samarium cobalt/neodymium iron boron double-phase composite magnet material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5874005A (en) * | 1982-09-06 | 1983-05-04 | Hitachi Metals Ltd | Permanent magnet |
| CN102568807A (en) * | 2012-01-16 | 2012-07-11 | 北京工业大学 | Method for preparing high-coercivity SmCoFeCuZr (samarium-cobalt-ferrum-copper-zirconium) high-temperature permanent magnet by doping nano-Cu powder |
| CN102655050A (en) * | 2012-05-04 | 2012-09-05 | 江苏大学 | Method for preparing high-performance high-temperature-resisting nanometer composite permanent magnet |
| CN105355353A (en) * | 2015-12-18 | 2016-02-24 | 江西金力永磁科技股份有限公司 | Neodymium iron boron magnet and preparation method |
-
2016
- 2016-10-10 CN CN201610885683.2A patent/CN106298136A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5874005A (en) * | 1982-09-06 | 1983-05-04 | Hitachi Metals Ltd | Permanent magnet |
| CN102568807A (en) * | 2012-01-16 | 2012-07-11 | 北京工业大学 | Method for preparing high-coercivity SmCoFeCuZr (samarium-cobalt-ferrum-copper-zirconium) high-temperature permanent magnet by doping nano-Cu powder |
| CN102655050A (en) * | 2012-05-04 | 2012-09-05 | 江苏大学 | Method for preparing high-performance high-temperature-resisting nanometer composite permanent magnet |
| CN105355353A (en) * | 2015-12-18 | 2016-02-24 | 江西金力永磁科技股份有限公司 | Neodymium iron boron magnet and preparation method |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107845470A (en) * | 2017-12-10 | 2018-03-27 | 武汉朋谊科技有限公司 | A kind of printer permanent magnet |
| CN110098026A (en) * | 2018-01-28 | 2019-08-06 | 蒋盼盼 | A kind of preparation method of rare-earth permanent magnet |
| CN108987017A (en) * | 2018-07-23 | 2018-12-11 | 浙江东阳东磁稀土有限公司 | A kind of no heavy rare earth sintered NdFeB |
| CN110895984A (en) * | 2018-09-12 | 2020-03-20 | 河南科技大学 | Strong texture SmCo5Base nano composite permanent magnetic material and its preparation method |
| CN110895984B (en) * | 2018-09-12 | 2021-06-04 | 河南科技大学 | Strong texture SmCo5Base nano composite permanent magnetic material and its preparation method |
| CN109972027A (en) * | 2018-12-24 | 2019-07-05 | 南昌航空大学 | A method of mutually adding preparation anisotropy CeFeB permanent-magnet alloy by low melting point PrCu intergranular |
| CN111863369A (en) * | 2019-04-29 | 2020-10-30 | 广东省稀有金属研究所 | Magnetic binder and preparation method thereof, and preparation method of composite permanent magnetic material |
| CN113593874A (en) * | 2021-06-30 | 2021-11-02 | 中国计量大学 | Preparation method of high-performance samarium cobalt/neodymium iron boron double-phase composite magnet material |
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