CN108335897A - A kind of NdCeFeB isotropism densification permanent magnet and preparation method thereof - Google Patents
A kind of NdCeFeB isotropism densification permanent magnet and preparation method thereof Download PDFInfo
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- CN108335897A CN108335897A CN201810015393.1A CN201810015393A CN108335897A CN 108335897 A CN108335897 A CN 108335897A CN 201810015393 A CN201810015393 A CN 201810015393A CN 108335897 A CN108335897 A CN 108335897A
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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
- H01F41/0293—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 diffusion of rare earth elements, e.g. Tb, Dy or Ho, into permanent magnets
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/16—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon
- C23C14/165—Metallic material, boron or silicon on metallic substrates or on substrates of boron or silicon by cathodic sputtering
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/35—Sputtering by application of a magnetic field, e.g. magnetron sputtering
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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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Abstract
The present invention discloses a kind of NdCeFeB isotropism densification permanent magnet and preparation method thereof, is calculated by atomic percent, prepares Nd firstx(FeCo)94‑x‑y‑zNbyGazB6Then alloy thin band prepares the sputtering target material of copper cerium alloy, cerium cobalt alloy, and the sputtering target material of preparation is plated in Ndx(FeCo)94‑x‑y‑zNbyGazB6On alloy thin band, hot-pressing processing is carried out after finally the alloy thin band for being coated with sputtering target material is crushed, the present invention is using NdFeB as matrix, light rare earth alloy CeCu, CeCo are diffused in matrix using hot-pressing technique, magnet coercivity is improved to play, obtain the permanent magnet with good magnetic property, the mode that alloy is added simultaneously is the form using liquid diffusion, it need not melting again when gold conjugate, existing NdFeB magnetic powders can directly be handled, effectively reduce the manufacturing cost of permanent magnet.
Description
Technical field
The present invention relates to magnetic material preparing technical fields, and in particular to a kind of NdCeFeB isotropism densification permanent magnet
And preparation method thereof.
Background technology
Nd-fe-b permanent magnetic alloy has excellent permanent magnetism performance, is widely used in new energy, electronics, automobile, track and hands over
The various fields such as logical and national defense industry.
Recently as intelligent automobile, electric vehicle, rail traffic, the development of New Energy Industry, society is to high-performance neodymium
The demand of iron boron permanent magnetism increases severely year by year.Since the Curie temperature of nd-fe-b permanent magnetic alloy is relatively low, causes its operating temperature relatively low, be
Its operating temperature is improved as far as possible, often a large amount of rare earth elements, especially heavy rare earth element are added in demand in existing alloy,
To greatly improve alloy coercivity, this results in alloy manufacturing cost to greatly improve.In order to make full use of price lower light dilute
Earth elements, such as Ce, people also are attempting to prepare Ce2Fe14B permanent-magnet alloys, but its magnetic property is far below NdFeB alloys, it can not
Practical application.
Invention content
In order to solve the above technical problems, a kind of NdCeFeB isotropism densification permanent magnet of present invention offer and its preparation side
Method.
Technical solution is as follows：A kind of preparation method of NdCeFeB isotropism densification permanent magnet, key are by following
Step carries out：
(1) it presses atomic percent to calculate, prepares Ndx(FeCo)94-x-y-zNbyGazB6Alloy thin band, the wherein value of x are 8-
14, y value is 0-1, and the value of z is 0-0.5；
(2) copper cerium alloy and cerium cobalt alloy are prepared respectively, and sputtering target material is respectively prepared；
(3) sputtering target material is plated in the Ndx(FeCo)94-x-y-zNbyGazB6Mixing strip is obtained on alloy thin band；
(4) the mixing strip is crushed, gained powder, which is carried out hot-pressing processing, is made the densification of NdCeFeB isotropism forever
Magnet.
Using above-mentioned technical proposal, by using traditional NdFeB as matrix, using hot-pressing technique by light rare earth alloy
CeCu, CeCo are diffused in matrix, and magnet coercivity is improved to play, and the permanent magnet coercive force thus prepared is high, and complete
Entirely without using traditional heavy rare earth element, production cost is effectively reduced.
It is calculated by atomic percent, the ratio of cerium and copper is 7 in the copper cerium alloy:3.
It is calculated by atomic percent, the ratio of cerium and cobalt is 7 in the cerium cobalt alloy:3.
It is calculated by mass percentage, the sputtering target material accounts for the 10-30% of the mixing strip total weight.
650-750 DEG C of the hot pressing temperature of above-mentioned hot-pressing processing, pressure 50-150MPa keep the temperature 3-10min.
When x is less than or equal to 12, the pressure of the hot-pressing processing is 150Mpa, when x is more than 12, the hot-pressing processing
Pressure is less than 150Mpa.When the content of Nd is relatively low, it is necessary to coordinating HIGH PRESSURE TREATMENT just can be such that the permanent magnet of preparation is densified more preferably,
And Nd contents it is higher when, can equally obtain consistency higher permanent magnet when can be relatively low with pressure.
The method of above-mentioned hot-pressing processing is discharge plasma sintering.The mode of hot-pressing processing using plasma discharging in addition to being burnt
Knot is outer to can also be vacuum induction hot pressing etc., is not limited to discharge plasma sintering.
A kind of densification NdCeFeB isotropism permanent magnets, key are：It is made by above-mentioned preparation method.
Advantageous effect：The present invention is diffused to light rare earth alloy CeCu, CeCo using NdFeB as matrix, using hot-pressing technique
In matrix, magnet coercivity is improved to play, obtains the permanent magnet with good magnetic property, while the side of alloy is added
Formula be using the form of liquid diffusion, when gold conjugate need not melting again, existing NdFeB magnetic powders can directly be located
Reason, preparation process is simple, raw materials used at low cost, is suitable for large-scale production.
Description of the drawings
Fig. 1 is the demagnetizing curve figure of sample 1-5 and reference substance 1；
Fig. 2 is the demagnetizing curve figure of sample 6-10 and reference substance 1；
Fig. 3 is the demagnetizing curve figure of sample 11-12 and reference substance 2；
Fig. 4 is the demagnetizing curve figure of sample 13 and reference substance 3.
Specific implementation mode
With reference to embodiment and attached drawing, the invention will be further described.
A kind of embodiment 1, NdCeFeB isotropism densification permanent magnet, prepares according to the following steps：
(1) Nd is prepared13Fe74Co7B6Alloy thin band：It is calculated by atomic percent, configuration nominal composition is Nd13Fe74Co7B6
Raw metal, obtain alloy cast ingot using vacuum melting, and melt back is three times, keeps alloy cast ingot ingredient uniform, by melting
Alloy cast ingot it is broken after vacuum get rid of band, it is 30m/s to get rid of tape speed, obtains Nd13Fe74Co7B6Alloy thin band；
(2) mixing strip is prepared：It is calculated by atomic percent, Ce is made using vacuum melting7Cu3Alloy, and diameter is made
2 inches of sputtering target material then uses magnetron sputtering by Ce7Cu3Alloy Plating is in above-mentioned Nd13Fe74Co7B6On alloy thin band, pass through
Sputtering time is controlled to control Ce7Cu3Content, make its weight account for gross weight respectively about 10%, 20% and 30% obtain three kinds mixing
Strip；
(3) NdCeFeB isotropism densification permanent magnets are prepared：Above-mentioned three kinds mixing strips are crushed respectively in glove box
At 80 mesh powders, the powder of acquisition is respectively charged into mold, and hot-pressing processing, hot pressing temperature are carried out using discharge plasma sintering
700 DEG C, pressure 50MPa of degree, heat preservation 3min obtain three kinds of NdCeFeB isotropism densification permanent magnets, are respectively designated as sample 1
(contain 10%Ce7Cu3), sample 2 (contain 20%Ce7Cu3) and sample 3 (contain 30%Ce7Cu3), the demagnetization of determination sample 1-3 is bent respectively
Line, the results are shown in Figure 1.
A kind of embodiment 2, NdCeFeB isotropism densification permanent magnet, prepares according to the following steps：The present embodiment and embodiment
1 the difference is that：Sputtering is obtained in step (2) 10% Ce7Cu3After the mixing strip of alloy, in step (3)
It is respectively 5min and 10min to control soaking time, respectively obtains sample 4 (heat preservation 5min) and sample 5 (heat preservation 10min), then
The demagnetizing curve of determination sample 4 and 5 respectively, influence of the research soaking time to magnet performance, the results are shown in Figure 1.
Comparative example 1 prepares NdFeB isotropism densification permanent magnets as blank control product, calculates, match by atomic percent
It is Nd to set nominal composition13Fe74B6Raw metal, obtain alloy cast ingot using vacuum melting, and melt back is three times, makes alloy
Ingot casting ingredient is uniform, the broken rear vacuum of the alloy cast ingot of melting is got rid of band, it is 30m/s to get rid of tape speed, obtains Nd13Fe74B6Alloy
Strip, by the Nd13Fe74B6Alloy thin band is broken into 80 mesh powders in glove box, will be packed into mold after the powder of acquisition, and
Hot-pressing processing, 700 DEG C, pressure 50MPa of hot pressing temperature are carried out using discharge plasma sintering, heat preservation 3min obtains reference substance 1, surveys
Determine the demagnetizing curve of reference substance 1, the results are shown in Figure 1.
As shown in Figure 1, due to being not added with CeCu alloys in reference substance 1, magnet coercivity is only 5.94kOe, magnet density
For 7.20g/cm3；In sample 1, it is added to 10% Ce7Cu3After alloy hot pressing, magnet coercivity rises to 12.46kOe, while magnetic
Volume density is also sharply increased, and reaches 7.49g/cm3；In sample 2, it is added to 20% Ce7Cu3After alloy hot pressing, magnet coercivity
For 12.86kOe, magnet density 7.53g/cm3；In sample 3, with Ce7Cu3Alloy content gradually increases to 30%, magnet coercive
Power varies slightly, but amplitude of variation is smaller, and magnet density is increased to 7.55g/cm3。
It can further be seen from figure 1 that the coercivity of sample 5 is bigger compared with sample 4, and the magnet density of sample 5 rises to
7.54g/cm3, in a certain range with the extension of soaking time, magnet performance can gradually be improved this explanation.But it studies
Simultaneously it has also been found that if soaking time is long, crystal grain is grown up seriously, and magnet performance can decline instead.
A kind of embodiment 3, NdCeFeB isotropism densification permanent magnet, prepares according to the following steps：
(1) Nd is prepared13Fe74Co7B6Alloy thin band：With embodiment 1；
(2) mixing strip is prepared：It is calculated by atomic percent, Ce is made using vacuum melting7Co3Alloy, and diameter is made
2 inches of sputtering target material then uses magnetron sputtering by Ce7Co3Alloy Plating is in above-mentioned Nd13Fe74Co7B6On alloy thin band, pass through
Sputtering time is controlled to control Ce7Co3Content, make its weight account for gross weight respectively about 10%, 20% and 30% obtain three kinds mixing
Strip；
(3) NdCeFeB isotropism densification permanent magnets are prepared：Above-mentioned three kinds mixing strips are crushed respectively in glove box
At 80 mesh powders, the powder of acquisition is respectively charged into mold, and hot-pressing processing, hot pressing temperature are carried out using discharge plasma sintering
700 DEG C, pressure 50MPa of degree, heat preservation 3min obtain three kinds of NdCeFeB isotropism densification permanent magnets, are respectively designated as sample 6
(contain 10%Ce7Co3), sample 7 (contain 20%Ce7Co3) and sample 8 (contain 30%Ce7Co3), the demagnetization of determination sample 6-8 is bent respectively
Line, and it is compared with the demagnetizing curve of reference substance 1, the results are shown in Figure 2.
A kind of embodiment 4, NdCeFeB isotropism densification permanent magnet, prepares according to the following steps：The present embodiment and embodiment
3 the difference is that：Sputtering is obtained in step (2) 10% Ce7Co3After the mixing strip of alloy, in step (3)
It is respectively 5min and 10min to control soaking time, respectively obtains sample 9 (heat preservation 5min) and sample 10 (heat preservation 10min), then
The demagnetizing curve of determination sample 9 and 10 respectively, influence of the research soaking time to magnet performance, the results are shown in Figure 2.
From figure 2 it can be seen that not adding Ce7Co3The 1 magnet coercivity of reference substance of alloy is only 5.94kOe；Sample 6
In, it is added to 10% Ce7Co3After alloy hot pressing, magnet coercivity rises to 13.65kOe, and magnet density rises to 7.50g/cm3；
In sample 7, it is added to 20% Ce7Co3After alloy hot pressing, magnet coercivity rises to 12.58kOe, magnet density 7.54g/
cm3；In sample 8, Ce7Co3Alloy content gradually increases to 30%, and magnet coercivity is 12.54kOe, magnet density 7.60g/
cm3。
From this figure it can be seen that with holding time to 10min, the coercivity of sample 10 increases to 14.31kOe,
There are promotion by a relatively large margin, magnet density 7.55g/cm compared with sample 93, when this illustrates in a certain range with heat preservation
Between extension, magnet coercivity also gradually increases.But study while also found that if soaking time is long, crystal grain is grown up seriously, magnetic
Body performance can decline instead, and the too short magnet density of soaking time can be smaller.
A kind of embodiment 5, NdCeFeB isotropism densification permanent magnet, prepares according to the following steps：
(1) Nd is prepared11Fe81.5Nb1Ga0.5B6Alloy thin band：It is calculated by atomic percent, configuration nominal composition is
Nd11Fe81.5Nb1Ga0.5B6Raw metal, obtain alloy cast ingot using vacuum melting, and melt back is three times, makes alloy cast ingot
Ingredient is uniform, the broken rear vacuum of the alloy cast ingot of melting is got rid of band, it is 30m/s to get rid of tape speed, obtains Nd11Fe81.5Nb1Ga0.5B6
Alloy thin band；
(2) mixing strip is prepared：It is calculated by atomic percent, Ce is made using vacuum melting7Cu3Alloy, and diameter is made
2 inches of sputtering target material then uses magnetron sputtering by Ce7Cu3Alloy Plating is in above-mentioned Nd11Fe81.5Nb1Ga0.5B6Alloy thin band
On, control Ce by controlling sputtering time7Cu3Content, make its weight account for always weigh about 10% obtain mixing strip；
(3) NdCeFeB isotropism densification permanent magnets are prepared：Above-mentioned mixing strip is broken into 80 purposes in glove box
The powder of acquisition is packed into mold, and carries out hot-pressing processing, 680 DEG C of hot pressing temperature, pressure using discharge plasma sintering by powder
150MPa, heat preservation 3min obtain NdCeFeB isotropism densification permanent magnets, are named as sample 11, and the demagnetization for measuring the sample is bent
Line, the results are shown in Figure 3.
A kind of embodiment 6, NdCeFeB isotropism densification permanent magnet, prepares according to the following steps：The present embodiment and embodiment
5 the difference is that：The alloy configured in step (2) is Ce7Co3, by NdCeFeB isotropism obtained in the present embodiment
Fine and close permanent magnet is named as sample 12, measures the demagnetizing curve of the sample, the results are shown in Figure 3.
Comparative example 2 prepares blank control product of the NdFeB isotropism densification permanent magnets as sample 11 and 12, by atom
Percentage calculation, configuration nominal composition are Nd11Fe81.5Nb1Ga0.5B6Raw metal, using vacuum melting obtain alloy cast ingot,
And melt back is three times, keeps alloy cast ingot ingredient uniform, the broken rear vacuum of the alloy cast ingot of melting is got rid of band, getting rid of tape speed is
30m/s obtains Nd11Fe81.5Nb1Ga0.5B6Alloy thin band, by the Nd11Fe81.5Nb1Ga0.5B6Alloy thin band is broken in glove box
80 mesh powders are broken into, mold will be packed into after the powder of acquisition, and hot-pressing processing, hot pressing temperature are carried out using discharge plasma sintering
680 DEG C, pressure 150MPa of degree, heat preservation 3min obtain reference substance 2, measure the demagnetizing curve of reference substance 2, the results are shown in Figure 3.
From the figure 3, it may be seen that in reference substance 2, due to being not added with cerium copper alloy or cerium cobalt alloy, the coercivity of magnet is only
9.1kOe or so, magnet density 7.36g/cm3, and compared with reference substance 1, due to adding Nb and Ga elements, the coercive of magnet
Power gets a promotion；In sample 11, it is added to 10% Ce7Co3After alloy hot pressing, magnet coercivity is risen to by 9.1kOe
12.1kOe, magnet density rise to 7.58g/cm3；In sample 12, it is added to 10% Ce7Cu3After alloy hot pressing, magnet coercivity
12.7kOe is risen to, magnet density rises to 7.57g/cm3。
A kind of embodiment 7, NdCeFeB isotropism densification permanent magnet, prepares according to the following steps：
(1) Nd is prepared12Fe81Nb1B6Alloy thin band：It is calculated by atomic percent, configuration nominal composition is Nd12Fe81Nb1B6
Raw metal, obtain alloy cast ingot using vacuum melting, and melt back is three times, keeps alloy cast ingot ingredient uniform, by melting
Alloy cast ingot it is broken after vacuum get rid of band, it is 30m/s to get rid of tape speed, obtains Nd12Fe81Nb1B6Alloy thin band；
(2) mixing strip is prepared：It is calculated by atomic percent, Ce is made using vacuum melting7Cu3Alloy, and diameter is made
2 inches of sputtering target material then uses magnetron sputtering by Ce7Cu3Alloy Plating is in above-mentioned Nd12Fe81Nb1B6On alloy thin band, pass through
Sputtering time is controlled to control Ce7Cu3Content, make its weight account for always weigh about 10% obtain mixing strip；
(3) NdCeFeB isotropism densification permanent magnets are prepared：Above-mentioned mixing strip is broken into 80 purposes in glove box
The powder of acquisition is packed into mold, and carries out hot-pressing processing, 680 DEG C of hot pressing temperature, pressure using discharge plasma sintering by powder
150MPa, heat preservation 3min obtain NdCeFeB isotropism densification permanent magnets, are named as sample 13, and the demagnetization for measuring the sample is bent
Line, the results are shown in Figure 4.
Comparative example 3 prepares blank control product of the NdFeB isotropism densification permanent magnets as sample 13, by atomic percent
Than calculating, configuration nominal composition is Nd12Fe81Nb1B6Raw metal, obtain alloy cast ingot using vacuum melting, and melt repeatedly
Refining three times, keeps alloy cast ingot ingredient uniform, the broken rear vacuum of the alloy cast ingot of melting is got rid of band, it is 30m/s to get rid of tape speed, is obtained
Nd12Fe81Nb1B6Alloy thin band, by the Nd12Fe81Nb1B6Alloy thin band is broken into 80 mesh powders in glove box, will obtain
Powder after be packed into mold, and discharge plasma sintering is utilized to carry out hot-pressing processing, 680 DEG C, pressure 150MPa of hot pressing temperature is protected
Warm 3min obtains reference substance 3, measures the demagnetizing curve of reference substance 3, the results are shown in Figure 4.
As shown in Figure 4, compared with reference substance 3, as the Ce of addition 10%7Cu3After alloy hot pressing, magnet coercivity by
6.0kOe rises to 9.3kOe, and density is by 7.41g/cm3Rise to 7.56g/cm3, found by the analysis of sample 11-13, individually added
Nb or Ga, or add both elements simultaneously and can preferably promote the coercivity of magnet；In addition simultaneously in Ndx
(FeCo)94-x-y-zNbyGazB6Ce is sputtered on alloy thin band7Cu3Alloy and Ce7Co3Alloy can also significantly improve the coercivity of magnet
And density.
Finally, it should be noted that foregoing description is only the preferred embodiment of the present invention, the ordinary skill people of this field
Member under the inspiration of the present invention, without prejudice to the purpose of the present invention and the claims, can make table as multiple types
Show, such transformation is each fallen within protection scope of the present invention.
Claims (8)
1. a kind of preparation method of NdCeFeB isotropism densification permanent magnet, it is characterised in that carry out according to the following steps：
(1) it presses atomic percent to calculate, prepares Ndx(FeCo)94-x-y-zNbyGazB6Alloy thin band, the wherein value of x are 8-14, y
Value be 0-1, the value of z is 0-0.5；
(2) copper cerium alloy and cerium cobalt alloy are prepared respectively, and sputtering target material is respectively prepared；
(3) sputtering target material is plated in the Ndx(FeCo)94-x-y-zNbyGazB6Mixing strip is obtained on alloy thin band；
(4) the mixing strip is crushed, gained powder, which is carried out hot-pressing processing, is made NdCeFeB isotropism densification permanent magnetism
Body.
2. a kind of preparation method of NdCeFeB isotropism densification permanent magnet according to claim 1, it is characterised in that：
It is calculated by atomic percent, the ratio of cerium and copper is 7 in the copper cerium alloy:3.
3. a kind of preparation method of NdCeFeB isotropism densification permanent magnet according to claim 1, it is characterised in that：
It is calculated by atomic percent, the ratio of cerium and cobalt is 7 in the cerium cobalt alloy:3.
4. a kind of preparation method of NdCeFeB isotropism densification permanent magnet according to claim 1,2 or 3, feature
It is：It is calculated by mass percentage, the sputtering target material accounts for the 10-30% of the mixing strip total weight.
5. a kind of preparation method of NdCeFeB isotropism densification permanent magnet according to claim 4, it is characterised in that：
650-750 DEG C of the hot pressing temperature of the hot-pressing processing, pressure 50-150MPa keep the temperature 3-10min.
6. a kind of preparation method of NdCeFeB isotropism densification permanent magnet according to claim 5, it is characterised in that：
When x is less than or equal to 12, the pressure of the hot-pressing processing is 150Mpa, and when x is more than 12, the pressure of the hot-pressing processing is less than
150Mpa。
7. a kind of preparation method of NdCeFeB isotropism densification permanent magnet according to claim 1, it is characterised in that：
The method of the hot-pressing processing is discharge plasma sintering.
8. a kind of NdCeFeB isotropism densification permanent magnet, it is characterised in that：It is prepared by claim 1-7 any one of them
Method is made.
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Effective date of registration: 20210111 Address after: 401121 3-2-2, building 1, 224 Wuling Road, Yubei District, Chongqing Patentee after: Chongqing Wentong electromechanical Co.,Ltd. Address before: No. 20, East Road, University City, Chongqing, Shapingba District, Chongqing Patentee before: Chongqing University of Science & Technology |