CN109346258A - A kind of nano double main phase magnet and preparation method thereof - Google Patents
A kind of nano double main phase magnet and preparation method thereof Download PDFInfo
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- CN109346258A CN109346258A CN201811046532.3A CN201811046532A CN109346258A CN 109346258 A CN109346258 A CN 109346258A CN 201811046532 A CN201811046532 A CN 201811046532A CN 109346258 A CN109346258 A CN 109346258A
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- 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
- H01F1/0577—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 sintered
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- 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
- H01F41/0266—Moulding; Pressing
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Abstract
The present invention relates to a kind of nano double main phase magnets and preparation method thereof, belong to rare-earth permanent-magnet material technical field.The chemical formula mass percent of corresponding permanent-magnet alloy is (Nd1‑xREx)a(Fe1‑ yMy)100‑a‑b Bb, wherein 0 < x≤0.65,0≤y≤0.2,26≤a≤34,0.8≤b≤1.2, RE are one of high abundance rare earth La, Ce, Y, one or more of M Zn, Ga, Co, Cu, Al, Nb, Sn, Mn element.The nano double main phase is respectively the Nd of the high magnetocrystalline anisotropy field opposite sex2Fe14(Nd, the RE) of B and low cost2Fe14B, the magnet that the two is mixed to prepare not only reduce manufacturing cost, while being able to maintain good magnetic property.
Description
Technical field
The invention belongs to rare-earth permanent-magnet material technical field more particularly to a kind of nano double main phase magnet and its preparation sides
Method.
Background technique
Nd-Fe-B permanent magnetism rely on excellent magnetic property, referred to as " magnetic king ", be widely used in aerospace, wind-power electricity generation,
The fields such as energy saving household electrical appliances, electronic apparatus and new-energy automobile.And as being constantly progressive for manufacturing technology is anticipated with people's environmental protection
The promotion of knowledge attractes attention by market in energy conservation and environmental protection, new energy, the big field of new-energy automobile three, becomes realization " made in China
The critical material of 2025 " development plans, dosage show good prospect with annual 10 ~ 20% speed rapid growth.
The rapid growth of Nd-Fe-B permanent-magnet material usage amount has also promoted the rise of the permanent magnetism indispensability element price such as Pr, Nd,
Have become the hot spot of current research using the substitution such as high abundance rare earth La, Ce, Y rare earth Pr, Nd.In patent
It refers in CN102800454A, CN103545079A, CN105321644A, CN106357175A and being prepared using traditional sintering techniques
Double main phase sintered magnets can reduce damage of the high abundance rare earth to magnetic property.Crystalline substance of the above-mentioned patent mainly for micro-meter scale
Grain, however double main phase sintering technologies rarely have description on nanoscale.
Summary of the invention
The purpose of the present invention is to provide a kind of nano double main phase sintered magnet and its technologies of preparing, using high abundance rare earth
La, Ce, Y etc. substitute Nd, in the case where significantly reducing magnetic property, manufacture nanocrystalline double main phase sintered magnets.
To achieve the above object, the present invention provides the following technical scheme that
A kind of nano double main phase magnet, composition are expressed as (RE by mass percentage1-xYx)a(Fe1-yMy)100-a-bBb, wherein 0 <
X≤0.65,0≤y≤0.2,26≤a≤34,0.8≤b≤1.2, RE are one of high abundance rare earth La, Ce, Y element, and M is
One or more of Zn, Ga, Co, Cu, Al, Nb, Sn, Mn element；The magnet is by high magnetocrystalline anisotropy field opposite sex field
Nd2Fe14(Nd, the RE) of B main phase and low cost2Fe14B main phase is combined.
The present invention is using conventional main phase Nd2Fe14B and the main phase (Nd, RE) containing high abundance rare earth element2Fe14B is mutually mixed
It closes, its object is to (1) to replace the Nd in Nd-Fe-B magnet using the part high abundance rare earth RE, increases high abundance rare earth in magnetic
Dosage in body reduces the manufacturing cost of magnet, reduces enterprise operation risk, and high abundance rare earth is avoided to overstock the money caused for a long time
Source waste and environmental pollution relevant issues；(2) the alloy main phase for forming two kinds of magnetocrystalline anisotropy field significant differences, by height
Formed pinning effect around magnetocrystalline anisotropy field main phase grain inhibits the low magnetocrystalline anisotropy field main phase grain magnetic domain of neighbour
Reversion, enable nano double main phase permanent magnet show to add the superior magnetic property of permanent magnet than single alloying element.
Further, the alloying component mass percent of the first main phase is Nd in the present inventiona(Fe1-yMy)100-a-bBb, 26≤
One or more of a≤34,0.8≤b≤1.2,0≤y≤0.2, M Zn, Ga, Co, Cu, Al, Nb, Sn, Mn element；Second
The alloying component mass percent of main phase is (Nd1-xREx)a(Fe1-yMy)100-a-bBb, wherein 0.2≤x≤0.8,0≤y≤0.2,
26≤a≤34,0.8≤b≤1.2, RE be one of high abundance rare earth La, Ce, Y, M Zn, Ga, Co, Cu, Al, Nb, Sn,
One or more of Mn element.
Above-mentioned magnet preparation method includes following steps preparation:
(1) Nd-Fe-B and (Nd, RE)-Fe-B alloy raw material preparation raw material: are prepared.
(2) electric arc melting: being respectively put into vacuum arc melting furnace for the raw material of preparation, is all made of following method and Nd- is made
Fe-B and (Nd, RE)-Fe-B alloy cast ingot: 6 × 10 are evacuated to-3Pa is passed through high-purity argon gas again, through multiple electric arc melting system
Alloy cast ingot is obtained, is then surface-treated ingot casting taking-up, and pressure breaking.
(3) vacuum gets rid of band: above-mentioned broken two kinds of alloy cast ingots being respectively put into high quartz pipe, are all made of such as lower section
Legal system obtains Nd-Fe-B and (Nd, RE)-Fe-B fast quenching thin strap: quartz ampoule base apertures stand-off distance is from 1 ~ 3mm of water-cooled copper roller, when in furnace
Vacuum degree reaches 8 × 10-4Pa is passed through high-purity argon gas (Ar), carries out getting rid of tape handling, water-cooled copper roller linear speed in pressure -0.06MPa
Degree is 22 ~ 28m/s, and fast quenching thin strap is with a thickness of 10 ~ 50 μm.
(4) it mixing and ball milling: after Nd-Fe-B and (Nd, RE)-Fe-B fast quenching thin strap are mixed according to a certain percentage, puts
Enter in stainless steel jar mill, while being put into suitable diameter 8mm stainless steel ball and dehydrated alcohol, under the protection of argon gas with
Speed 10 ~ 80h of ball milling of 260 ~ 350r/min is made the nano double main phase that granularity is 80 ~ 200nm and mixes magnetic powder.
(5) compression moulding: it is dry in vacuum glove box that the good nano double main phase of ball milling is mixed into magnetic powder, and is protected in argon gas
The block of diameter 20mm, and encapsulation process are pressed under shield, be subsequently placed into cold isostatic press with 150 ~ 200MPa compacting 0.01 ~
3h。
(6) block suppressed discharge plasma sintering: is put into Fast Sintering in the graphite jig of diameter 20mm, vacuum
Degree≤2Pa, 30 ~ 50MPa of sintering pressure, sintering temperature 650 ~ 850oC, 5 ~ 10min of heating-up time, the sintered heat insulating time be 5 ~
The Nd of fully dense high magnetocrystalline anisotropy field opposite sex field has been made in 15min2Fe14B main phase and low cost (Nd,
RE)2Fe14The complex sintered magnet of B main phase.
Above-mentioned steps are fast using fast melt-quenching technology preparation Nd-Fe-B and the two distinct types of alloy of (Nd, RE)-Fe-B
It quenches strip, and under argon gas and dehydrated alcohol duplicate protection, enable melt spun alloy refine rapidly by high-energy ball milling and mixes
It is even, it is made and mixes double main phase magnetic powders, obtained after discharge plasma sintering and exist simultaneously Nd2Fe14B and (Nd, RE)2Fe14Two kinds of B
The sintering of nano-material magnet of type main phase.Magnetic, which is carried out, by respective magnetocrystalline anisotropy field difference between two types main phase exchanges coupling
Interaction hinders the reversion of easy magnetization crystal grain magnetic domain, ensure that the high-performance of magnet.Therefore, mixing and ball milling prepares nano double
Main phase magnetic powder is the key that prepare nano double main phase magnet.
During step (3) vacuum quick quenching, water-cooled copper roller line revolving speed cannot be below 22m/s when fast quenching, range 22 ~
28m/s, fast quenching thin strap is with a thickness of 10 ~ 50 μm.Faster revolving speed can guarantee that molten metal is quickly cooled down, and obtain amorphous alloy
Fast quenching thin strap effectively avoids mechanical milling process since the magnetic powder of the meticulous initiation of nanometer powder granularity aoxidizes, guarantees that magnet is sintered
Performance.Water-cooled copper roller revolving speed is lower (< 22m/s), and fast quenching thin strap crystallization degree is more obvious, in mechanical milling process after powder collision refinement
Oxidative phenomena is also more serious, and magnet performance significantly reduces after sintering.
Powder size obtained should be the super-fine magnetic powder of 80 ~ 500nm during step (4) mixing and ball milling, and granularity is excellent
Select range between 80 ~ 200nm.Powder size is thinner, and for magnetic powder closer to single-domain particle, different types of main phase grain is indirectly
Contacting surface product is bigger, causes during magnetic exchange coupling, the nanometer main phase grain of high magnetocrystalline anisotropy field can be more by neighbour
The collective effect of a crystal grain realizes the pinning to low magnetocrystalline anisotropy field main phase grain, and nano double main phase magnets exhibit is enabled to go out more
Add excellent magnetic property.
0.01 ~ 3h is suppressed by the cold isostatic press that pressure is 150 ~ 200MPa in step (5) forming pressing process
It is key problem in technology of the invention.It is handled by isostatic cool pressing, nanometer powder pressed density is effectively promoted, and is conducive to plasma discharging
The densification process of magnetic powder in sintering process ensure that the remanent magnetism and coercivity of magnet after sintering.
Compared with the prior art, the beneficial effects of the present invention are:
(1) present invention replaces the Nd in Nd-Fe-B magnet using high abundance rare earth fraction, increases the dosage of high abundance rare earth,
The utilization rate of resource is improved, the manufacturing cost of magnet is reduced.
(2) by regulation preparation process, nano double main phase permanent magnet is made to show to add permanent magnet more than single alloying element
Excellent magnetic property.
Specific embodiment
The present invention is further described in detail With reference to embodiment, and the embodiment provided is only for explaining
The bright present invention, the range being not intended to be limiting of the invention.
Embodiment 1:
(1) main phase A:Nd is prepared by mass percentage31.5(Fe0.97Cu0.03)67.5B1.0With main phase B:(Nd0.5Y0.5)31.5
(Fe0.97Cu0.03)67.5B1.0。
(2) prepared main phase A and main phase B are respectively put into vacuum arc smelting furnace, are evacuated to 6 × 10-3Lead to after Pa
Enter high-purity argon gas and melting, to ensure alloy uniformity melt back 5 times, removal Surface Oxygen of then slightly polishing alloy cast ingot
Pressure breaking after change skin.
(3) broken alloy cast ingot is put into high quartz pipe, and quartz ampoule is placed in apart from water-cooled copper roller 2mm
Place, gets rid of tape handling in furnace pressure -0.06MPa, and getting rid of tape speed is 26m/s.
(4) it is put into stainless steel jar mill after mixing two kinds of main phase fast quenching thin strap A:B according to the ratio of 6:4,
It is put into stainless steel ball (diameter 8mm) and appropriate dehydrated alcohol by the ratio of grinding media to material of 15:1 simultaneously, with 300r/ under the protection of argon gas
The magnetic powder that granularity is 80 ~ 200nm is made in the speed ball milling 80h of min.
(5) mixed-powder is pressed into the block of diameter 20mm by argon gas protection, be put into after sealing in cold isostatic press with
200MPa suppresses 0.5h.
(6) block is put into Fast Sintering in the graphite jig of diameter 20mm, vacuum degree≤2Pa, sintering pressure 50MPa,
Sintering temperature 760oC, heating-up time 10min, sintered heat insulating time are 8min, and fully dense sintering (Nd has been made0.8Y0.2)31.5
(Fe0.97Cu0.03)67.5B1.0Double main phase magnets.
By above-mentioned sintered specimen wire cutting be made diameter D be 10mm, the cylinder of height 15mm, and using NIM-2000HF it is dilute
Native permanent magnetism mark measuring device carries out magnetic property detection, and performance is as shown in table 1.
(the Nd of table 1. different preparation methods and technique0.8Y0.2)31.5(Fe0.97Cu0.03)67.5B1.0The magnetism of sintered magnet
Energy.
Embodiment 2:
(1) (Nd is prepared by mass percentage0.8Y0.2)31.5(Fe0.97Cu0.03)67.5B1.0Raw material, and burnt using single alloyage preparation
Tie magnet.
(2) prepared raw material is put into vacuum arc smelting furnace, is evacuated to 6 × 10-3High-purity argon gas is passed through after Pa simultaneously
Melting, to ensure alloy uniformity melt back 5 times, pressure is broken after removal surface scale of then slightly polishing alloy cast ingot
It is broken.
(3) broken alloy cast ingot is put into high quartz pipe, and quartz ampoule is placed in apart from water-cooled copper roller 2mm
Place, gets rid of tape handling in furnace pressure -0.06MPa, and getting rid of tape speed is 26m/s.
(4) fast quenching thin strap is put into stainless steel jar mill, while is put into stainless steel ball (diameter by the ratio of grinding media to material of 15:1
8mm) and appropriate dehydrated alcohol, with the speed ball milling 80h of 300r/min under the protection of argon gas, it is 80 ~ 200nm that granularity, which is made,
Magnetic powder.
(5) mixed-powder is pressed into the block of diameter 20mm by argon gas protection, be put into after sealing in cold isostatic press with
200MPa suppresses 0.5h.
(6) block is put into Fast Sintering in the graphite jig of diameter 20mm, vacuum degree≤2Pa, sintering pressure 50MPa,
Sintering temperature 760oC, heating-up time 10min, sintered heat insulating time are 8min, and fully dense (Nd has been made0.8Y0.2)31.5
(Fe0.97Cu0.03)67.5B1.0Sintered magnet.
By above-mentioned sintered specimen wire cutting be made diameter D be 10mm, the cylinder of height 15mm, and using NIM-2000HF it is dilute
Native permanent magnetism mark measuring device carries out magnetic property detection, and performance is as shown in table 1.
Embodiment 3:
(1) main phase A:Nd is prepared by mass percentage31.5(Fe0.97Cu0.03)67.5B1.0With main phase B:(Nd0.5Y0.5)31.5
(Fe0.97Cu0.03)67.5B1.0。
(2) prepared main phase A and main phase B are respectively put into vacuum arc smelting furnace, are evacuated to 6 × 10-3Lead to after Pa
Enter high-purity argon gas and melting, to ensure alloy uniformity melt back 5 times, removal Surface Oxygen of then slightly polishing alloy cast ingot
Pressure breaking after change skin.
(3) broken alloy cast ingot is put into high quartz pipe, and quartz ampoule is placed in apart from water-cooled copper roller 2mm
Place, gets rid of tape handling in furnace pressure -0.06MPa, and getting rid of tape speed is 26m/s.
(4) it is put into stainless steel jar mill after mixing two kinds of main phase fast quenching thin strap A:B according to the ratio of 6:4,
It is put into stainless steel ball (diameter 8mm) and appropriate dehydrated alcohol by the ratio of grinding media to material of 15:1 simultaneously, with 300r/ under the protection of argon gas
The magnetic powder that granularity is 260 ~ 500nm is made in the speed ball milling 80h of min.
(5) mixed-powder is pressed into the block of diameter 20mm by argon gas protection, be put into after sealing in cold isostatic press with
200MPa suppresses 0.5h.
(6) block is put into Fast Sintering in the graphite jig of diameter 20mm, vacuum degree≤2Pa, sintering pressure 50MPa,
Sintering temperature 760oC, heating-up time 10min, sintered heat insulating time are 8min, and fully dense sintering (Nd has been made0.8Y0.2)31.5
(Fe0.97Cu0.03)67.5B1.0Double main phase magnets.
By above-mentioned sintered specimen wire cutting be made diameter D be 10mm, the cylinder of height 15mm, and using NIM-2000HF it is dilute
Native permanent magnetism mark measuring device carries out magnetic property detection, and performance is as shown in table 1.
Embodiment 4:
(1) main phase A:Nd is prepared by mass percentage31.5(Fe0.97Cu0.03)67.5B1.0With main phase B:(Nd0.5Y0.5)31.5
(Fe0.97Cu0.03)67.5B1.0。
(2) prepared main phase A and main phase B are respectively put into vacuum arc smelting furnace, are evacuated to 6 × 10-3Lead to after Pa
Enter high-purity argon gas and melting, to ensure alloy uniformity melt back 5 times, removal Surface Oxygen of then slightly polishing alloy cast ingot
Pressure breaking after change skin.
(3) broken alloy cast ingot is put into high quartz pipe, and quartz ampoule is placed in apart from water-cooled copper roller 2mm
Place, gets rid of tape handling in furnace pressure -0.06MPa, and getting rid of tape speed is 26m/s.
(4) it is put into stainless steel jar mill after mixing two kinds of main phase fast quenching thin strap A:B according to the ratio of 6:4,
It is put into stainless steel ball (diameter 8mm) and appropriate dehydrated alcohol by the ratio of grinding media to material of 15:1 simultaneously, with 300r/ under the protection of argon gas
The magnetic powder that granularity is 80 ~ 200nm is made in the speed ball milling 80h of min.
(5) Fast Sintering in the graphite jig of diameter 20mm, vacuum degree≤2Pa, sintering pressure are put into after encapsulating magnetic powder
50MPa, sintering temperature 760oC, heating-up time 10min, sintered heat insulating time are 8min, and fully dense sintering has been made
(Nd0.8Y0.2)31.5(Fe0.97Cu0.03)67.5B1.0Double main phase magnets.
By above-mentioned sintered specimen wire cutting be made diameter D be 10mm, the cylinder of height 15mm, and using NIM-2000HF it is dilute
Native permanent magnetism mark measuring device carries out magnetic property detection, and performance is as shown in table 1.
Embodiment 5:
(1) main phase A:Nd is prepared by mass percentage31.5(Fe0.97Cu0.03)67.5B1.0With main phase B:(Nd0.5Y0.5)31.5
(Fe0.97Cu0.03)67.5B1.0。
(2) prepared main phase A and main phase B are respectively put into vacuum arc smelting furnace, are evacuated to 6 × 10-3Lead to after Pa
Enter high-purity argon gas and melting, to ensure alloy uniformity melt back 5 times, removal Surface Oxygen of then slightly polishing alloy cast ingot
Pressure breaking after change skin.
(3) broken alloy cast ingot is put into high quartz pipe, and quartz ampoule is placed in apart from water-cooled copper roller 2mm
Place, gets rid of tape handling in furnace pressure -0.06MPa, and getting rid of tape speed is 16m/s.
(4) it is put into stainless steel jar mill after mixing two kinds of main phase fast quenching thin strap A:B according to the ratio of 6:4,
It is put into stainless steel ball (diameter 8mm) and appropriate dehydrated alcohol by the ratio of grinding media to material of 15:1 simultaneously, with 300r/ under the protection of argon gas
The magnetic powder that granularity is 80 ~ 200nm is made in the speed ball milling 80h of min.
(5) mixed-powder is pressed into the block of diameter 20mm by argon gas protection, be put into after sealing in cold isostatic press with
200MPa suppresses 0.5h.
(6) block is put into Fast Sintering in the graphite jig of diameter 20mm, vacuum degree≤2Pa, sintering pressure 50MPa,
Sintering temperature 760oC, heating-up time 10min, sintered heat insulating time are 8min, and fully dense sintering (Nd has been made0.8Y0.2)31.5
(Fe0.97Cu0.03)67.5B1.0Double main phase magnets.
By above-mentioned sintered specimen wire cutting be made diameter D be 10mm, the cylinder of height 15mm, and using NIM-2000HF it is dilute
Native permanent magnetism mark measuring device carries out magnetic property detection, and performance is as shown in table 1.
It can be seen that the nanocrystalline sintered magnet prepared using double main phase methods is had by the result of embodiment 1,2,3,4,5
The magnetic property more excellent than single alloyage.In addition to this, by the granularity of nano-powder in strict control mechanical milling process, in ball
The pressing process increased newly after honed journey, and the revolving speed control of water-cooled copper roller during band is got rid of, being be combined with each other by three can be with
Guarantee more excellent magnetic property, high performance Nanocrystalline Two-phase magnet can be made.
It is any ripe although the present invention is disclosed as above with embodiment, its protection scope being not intended to limit the invention
The technical staff for knowing this technology changes and retouches made without departing from the spirit and scope of the invention, should belong to this
The protection scope of invention.
Claims (6)
1. a kind of nano double main phase magnet, it is characterised in that: composition is expressed as (RE by mass percentage1-xYx)a(Fe1- yMy)100-a-bBb, wherein 0 < x≤0.65,0≤y≤0.2,26≤a≤34,0.8≤b≤1.2, RE be high abundance rare earth La,
One of Ce, Y element, one or more of M Zn, Ga, Co, Cu, Al, Nb, Sn, Mn element；The magnet is by high magnetic
The Nd of anisotropic crystalline field opposite sex field2Fe14(Nd, the RE) of B main phase and low cost2Fe14B main phase is combined.
2. nano double main phase magnet according to claim 1, it is characterised in that: wherein the first main phase ingredient percent
For Nda(Fe1-yMy)100-a-bBb, 26≤a≤34,0.8≤b≤1.2,0≤y≤0.2, M Zn, Ga, Co, Cu, Al, Nb, Sn,
One or more of Mn element；The ingredient percent of second main phase is (Nd1-xREx)a(Fe1-yMy)100-a-bBb, wherein
0.2≤x≤0.8,0≤y≤0.2,26≤a≤34,0.8≤b≤1.2, RE are one of high abundance rare earth La, Ce, Y, and M is
One or more of Zn, Ga, Co, Cu, Al, Nb, Sn, Mn element.
3. a kind of preparation method of nano double main phase magnet as described in claim 1, characterized by the following steps:
(1) Nd-Fe-B and (Nd, RE)-Fe-B alloy raw material preparation raw material: are prepared；
(2) raw material of configuration electric arc melting: is passed through into the alloy cast ingot that different main phases are made in vacuum arc melting respectively；
(3) vacuum gets rid of band: by the ingot casting of two kinds of main phases respectively at got rid of under high-purity argon gas environment tape handling be made fast quenching thin strap；
(4) mixing and ball milling: Nd-Fe-B and (Nd, RE)-Fe-B fast quenching thin strap are mutually mixed according to a certain percentage, and
High-energy ball milling in argon atmosphere is made nano double main phase and mixes magnetic powder；
(5) compression moulding: by magnetic powder vacuum drying and the compression moulding under high-purity argon gas protection, isostatic cool pressing is then carried out；
(6) discharge plasma sintering: carrying out discharge plasma sintering for block, and fully dense high magnetocrystalline anisotropy field has been made
The Nd of anisotropic field2Fe14(Nd, the RE) of B main phase and low cost2Fe14The complex sintered magnet of B main phase.
4. such as the preparation method in claim 3, it is characterised in that: fast quenching process in step (3), water-cooled copper roller line revolving speed are
22 ~ 28m/s, fast quenching thin strap is with a thickness of 10 ~ 50 μm.
5. such as the preparation method in claim 3, it is characterised in that: in step (4) mechanical milling process need in high-purity argon gas and
The common protection of dehydrated alcohol is lower to be carried out, and particle size range is in 80 ~ 200nm.
6. such as the preparation method in claim 3, it is characterised in that: in step (5) under protective atmosphere briquet, then
Hermetic bag package carries out isostatic cool pressing, 150 ~ 200MPa of pressing pressure, and the pressing time is 0.01 ~ 3h.
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| CN111091944A (en) * | 2019-12-31 | 2020-05-01 | 浙江大学 | Lanthanum-cerium-yttrium-rich multi-main-phase fine-grain rare earth permanent magnet material and preparation method thereof |
| CN111462974A (en) * | 2020-02-27 | 2020-07-28 | 江西理工大学 | High-performance double-main-phase composite rare earth permanent magnet material and preparation method thereof |
| CN111724959A (en) * | 2019-03-20 | 2020-09-29 | Tdk株式会社 | R-T-B permanent magnet |
| CN115821173A (en) * | 2022-11-30 | 2023-03-21 | 国网智能电网研究院有限公司 | High-abundance rare earth element-based nano dual-phase composite material and preparation method thereof |
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| CN111724959A (en) * | 2019-03-20 | 2020-09-29 | Tdk株式会社 | R-T-B permanent magnet |
| CN111724959B (en) * | 2019-03-20 | 2023-11-14 | Tdk株式会社 | R-T-B permanent magnet |
| CN111091944A (en) * | 2019-12-31 | 2020-05-01 | 浙江大学 | Lanthanum-cerium-yttrium-rich multi-main-phase fine-grain rare earth permanent magnet material and preparation method thereof |
| CN111091944B (en) * | 2019-12-31 | 2021-06-04 | 浙江大学 | Lanthanum-cerium-yttrium-rich multi-main-phase fine-grain rare earth permanent magnet material and preparation method thereof |
| CN111462974A (en) * | 2020-02-27 | 2020-07-28 | 江西理工大学 | High-performance double-main-phase composite rare earth permanent magnet material and preparation method thereof |
| CN111462974B (en) * | 2020-02-27 | 2021-08-24 | 江西理工大学 | High-performance double-main-phase composite rare earth permanent magnet material and preparation method thereof |
| CN115821173A (en) * | 2022-11-30 | 2023-03-21 | 国网智能电网研究院有限公司 | High-abundance rare earth element-based nano dual-phase composite material and preparation method thereof |
| CN116334664A (en) * | 2023-05-30 | 2023-06-27 | 中石油深圳新能源研究院有限公司 | Amorphous nano powder for water electrolysis and preparation method and preparation device thereof |
| CN116334664B (en) * | 2023-05-30 | 2023-09-22 | 中石油深圳新能源研究院有限公司 | Amorphous nano powder for water electrolysis and preparation method and preparation device thereof |
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