CN101877264B - Rare earth-based permanent magnetic material and preparation method thereof - Google Patents
Rare earth-based permanent magnetic material and preparation method thereof Download PDFInfo
- Publication number
- CN101877264B CN101877264B CN 200910107158 CN200910107158A CN101877264B CN 101877264 B CN101877264 B CN 101877264B CN 200910107158 CN200910107158 CN 200910107158 CN 200910107158 A CN200910107158 A CN 200910107158A CN 101877264 B CN101877264 B CN 101877264B
- Authority
- CN
- China
- Prior art keywords
- rare earth
- boride
- magnetic material
- permanent magnetic
- bulk alloy
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention provides a rare earth-based permanent magnetic material and a preparation method thereof. The rare earth-based permanent magnetic material comprises a rare earth-based main body alloy and boride, wherein the boride is one or more of SiB, MnB and AlB. The invention also provides the preparation method of the rare earth-based permanent magnetic material. The method comprises the following steps of: performing magnetic field orientation compression molding on the mixture of the rare earth-based alloy and the boride and then performing sintering and tempering under the condition of vacuum and the protection of inert gas to obtain the rare earth-based permanent magnetic material. The mechanical properties and coercive forces of the rare earth-based permanent magnetic material of the invention are greatly improved.
Description
Technical field
The invention relates to a kind of rare earth-based permanent magnetic material and preparation method thereof.
Background technology
Nineteen eighty-three, the SUMITOMO CHEMICAL metal company has been invented rare earth-based permanent magnetic material first.Since coming out, rare earth-based permanent magnetic material has been widely used in various fields such as automobile, computer, electronics, machinery, the energy, medicine equipment owing to have advantages such as high energy product, high-coercive force, cheap relatively price and sufficient resources deposit.Therefore particularly rare earth based has the very high ratio of performance to price, becomes to make that usefulness is high, volume is little, the ideal material of the magnetic function device of light weight, and many applications are produced revolutionary impacts.But one of shortcoming of sintering rare-earth base is that coercive force is lower; The mechanical property of sintering rare-earth base is also relatively poor in addition, brings difficulty to machining, thereby is to a certain degree limiting its use.
A kind of rare earth based nano permanent magnetic material is disclosed among the CN1210344A; Basis is (atomic percent): Dd 3.5-12; B 3.5-6, the Fe surplus is characterized by; In above-mentioned basis among the carboritride HfC of adding refractory metal W, Mo, Nb, V, Cr, Hf, Zr, Ti and alloying thereof, ZrC, the TiC one or more, its consumption accounts for the Nd that forms
2Fe
14The 2-3 atomic percent of B phase compound.
Disclose among the CN 1688000A and a kind ofly added nano-oxide at crystal boundary in mutually and improve the coercitive method of sintering rare-earth base; This method comprises; 1) main-phase alloy adopts casting technique to process the rare earth based alloy of ingot; Or adopting rapid hardening thin slice technology to process rare earth based rapid hardening thin slice, the crystal boundary alloy adopts casting technique to process alloy of ingot or rapid hardening thin slice technology processes the rapid hardening thin slice or rapid quenching technique is processed rapid tempering belt; 2) adopt the quick-fried method of hydrogen perhaps through disintegrating machine the alloy of ingot of main-phase alloy or alloy of ingot, rapid hardening thin slice or the rapid tempering belt of rapid hardening thin slice and crystal boundary alloy to be broken, broken back is processed the powder that average particulate diameter is the 2-10 micron respectively through the airflow milling abrasive material; 3) in the powder of crystal boundary alloy, add the 2-20% of its weight, through the nano-oxide of dispersion treatment and the oxidation inhibitor of 1-10%, in batch mixer, mix; 4) will mix with the main-phase alloy powder through the crystal-boundary phase alloy powder that nano-oxide mixes, the crystal-boundary phase alloy powder weight accounts for the 1-20% of total weight, adds the gasoline of 0.5-5% simultaneously, in batch mixer, is uniformly mixed into mixed-powder; 5) mixed-powder carries out magnetic field orientating compacting, compression moulding blank in the magnetic field of 1.2-2.0T; 6) parison spare is placed high vacuum sintering furnace,, passed through again 500-650 ℃ of tempering heat treatment 2-4 hour, make sintered magnet at 1050-1125 ℃ of sintering 2-4 hour.Coercive force according to the rare earth-based permanent magnetic material of this method manufacturing improves, but its mechanical property is still relatively poor.
Summary of the invention
The objective of the invention is to overcome the mechanical property of prior art middle rare earth based permanent magnetic material and the shortcoming that coercive force can not improve simultaneously, a kind of have the simultaneously mechanical property of improvement and coercitive rare earth-based permanent magnetic material of raising and preparation method thereof are provided.
The invention provides a kind of rare earth-based permanent magnetic material, this permanent magnetic material contains rare earth based bulk alloy and boride, and wherein, said boride is one or more among SiB, MnB, the AlB.
The invention provides a kind of preparation method of rare earth-based permanent magnetic material; This method comprises that the mixture with rare earth based bulk alloy and boride carries out magnetic field orientating compression moulding; Under the condition of vacuum or inert gas shielding, carry out sintering and tempering then; Obtain rare earth-based permanent magnetic material, wherein, said boride is one or more among SiB, MnB, the AlB.
Experimental result shows: rare earth-based permanent magnetic material provided by the invention is at remanent magnetism (B
r) and magnetic energy product (BH)
MaxMagnetic property keep having higher coercive force (H under the constant basically situation
Cj) and the mechanical property improved.The B of rare earth-based permanent magnetic material provided by the invention
r(BH)
MaxWith Comparative Examples much at one, the coercive force of the rare earth-based permanent magnetic material that embodiment 2 provides is up to 27.68kOe, bending strength is up to 372.45 MPas, and the coercive force and the bending strength of Comparative Examples 1 of contrast is respectively 26.98kOe and 337.40 MPas with it; The coercive force of the rare earth-based permanent magnetic material that embodiment 10 provides is 21.19kOe, and bending strength is up to 367.82 MPas, and the coercive force and the bending strength of the Comparative Examples 2 of contrast are respectively 19.89kOe and 354.20 MPas with it.
Rare earth-based permanent magnetic material preparation method provided by the invention can make at remanent magnetism (B
r) and magnetic energy product (BH)
MaxMagnetic property keep the rare earth-based permanent magnetic material that has the mechanical property of higher coercive force and improvement under the constant basically situation.This method technology is simple, can carry out industrialized production.
Embodiment
Rare earth-based permanent magnetic material provided by the invention contains rare earth based bulk alloy and boride, and wherein, said boride is one or more among SiB, MnB, the AlB.
Although a spot of boride can effectively improve the mechanical property and the coercive force of rare earth-based permanent magnetic material, under the preferable case, the content of said boride is the 0.01-5 weight % of said rare earth based bulk alloy.When the content of boride is lower than 0.01 weight %, can improve the mechanical property and the coercive force of rare earth-based permanent magnetic material to a certain extent, but effect not very remarkable; When boride content is higher than 5 weight %, improve the mechanical property and the coercive force of rare earth-based permanent magnetic material, but effect is not as being lower than the good of 5 weight %; When boride content is too high, during like 8 weight %, will reduce the remanent magnetism (B of rare earth-based permanent magnetic material
r) and magnetic energy product (BH)
MaxMagnetic property.
Although various borides all can be realized the object of the invention; But the preferred said boride of the present invention is for forming dystectic compound with B; Further be preferably among SiB, MnB and the AlB one or more, be preferably one or both the mixture among independent use SiB or SiB and MnB or the AlB especially.In described boride mixture, the weight ratio of SiB and other boride is 1-20: 1.Coercive force and the mechanical property of rare earth-based permanent magnetic material that contains the boride of this compound mode improved the most remarkable.The average grain of said boride is more carefully good more, and the average particulate diameter of preferred boride is the 2-1000 nanometer, and more preferably the diameter particle is the 2-100 nanometer.When greater than 1000 nanometers, also can improve the mechanical property and the coercive force of rare earth-based permanent magnetic material, descend but improve effect.
Said boride is dispersed in the bulk alloy.
The composition of said rare earth based bulk alloy is preferably Ra (Fe
1-xCo
x)
100-a-b-cM
cB
b
Wherein, a, b, c and x represent atomic percentage separately, 14≤a≤20; 5≤b≤6.5; 0.1≤c≤6; 0≤x≤0.03, surplus are Fe and unavoidable impurities.R is selected from least a element among Pr, Nd, La, Ce, Gd, Dy, Tb, the Ho.M is selected from least a element among Al, Cu, Ti, V, Cr, Zr, Hf, Mn, Nb, Sn, Mo, Ga, the Si.Its average particulate diameter is preferably the 2-10 micron.
The preparation method of rare earth-based permanent magnetic material provided by the invention; This method comprises that the mixture with rare earth based bulk alloy and boride carries out magnetic field orientating compression moulding; Under the condition of vacuum or inert gas shielding, carry out sintering and tempering then; Obtain rare earth-based permanent magnetic material, wherein, said boride is one or more among SiB, MnB, the AlB.
The technological process of adopting sintering process to make rare earth-based permanent magnetic material generally has prescription, melting, steel ingot fragmentation, powder process, vacuum preservation superfine powder, the compression moulding of magnetic orientation, vacuum-sintering, inspection branch and electroplates.Improvement of the present invention only is after powder process, magnetic is orientated before the compression moulding, and rare earth based alloy powder and boride are mixed, and other steps are conventional method.
Concrete steps are following:
1) the broken and grinding with the rare earth based alloy obtains the material of main part powder.The method that the rare earth based alloy is broken can be quick-fried method of hydrogen or the method through crusher in crushing, and the method for said powder process can be processed the powder that average diameter is the 2-10 micron for through the airflow milling abrasive material.
Said rare earth based alloy can be rare earth based alloy of ingot and rare earth based rapid hardening thin slice, can also can adopt casting technique to process the rare earth based alloy of ingot through being purchased acquisition, or adopts rapid hardening thin slice technology to process rare earth based rapid hardening thin slice, and its composition is Ra (Fe
1-xCo
x)
100-a-b-cM
cB
b
Wherein, a, b, c and x represent atomic percentage separately, 14≤a≤20; 5≤b≤6.5; 0.1≤c≤6; 0≤x≤0.03, surplus are Fe and unavoidable impurities.R is selected from least a element among Pr, Nd, La, Ce, Gd, Dy, Tb, the Ho.M is selected from least a element among Al, Cu, Ti, V, Cr, Zr, Hf, Mn, Nb, Sn, Mo, Ga, the Si.
The method that said casting technique is processed alloy of ingot is conventionally known to one of skill in the art; Can the alloy liquation after the melting be cast in the water-cooled copper mould; The rare earth based alloy of ingot mainly constitutes with column crystal; Separated by rich neodymium phase thin layer between the column crystal, distance is about the 100-1500 micron between the adjacent rich neodymium phase layer.
The method that said rapid hardening thin slice technology is processed the rapid hardening thin slice is conventionally known to one of skill in the art; Can the alloy liquation after the melting be watered the copper roller rotating surface; About the rotational line speed 1-2 meter per second of copper roller surface; The alloy liquation cools off rapidly, form thickness between the 0.2-0.5 millimeter, the thin slice that differs in size of width, the brilliant width of thin slice cylindrical is the 5-25 micron.
Said is conventionally known to one of skill in the art through the broken method of hydrogen crushing furnace hydrogen, for example, and the rare earth based alloy that will have the unsalted surface rustless steel container of packing into; After vacuumizing; Charge into high-purity hydrogen, reach about an atmospheric pressure, after 20-30 minute, will hear that the cracker of alloy and the temperature of container raise; This is to form hydride behind the absorption hydrogen and explosion, vacuumizes dehydrogenase 12-10 hour at 400-600 ℃ then.
Said is conventionally known to one of skill in the art through disintegrating machine with rare earth based alloy of ingot or the broken method of rare earth based rapid hardening thin slice, for example adopts jaw crusher to carry out coarse crushing, carries out middle fragmentation through middle disintegrating machine then.
The method of said airflow milling powder process is conventionally known to one of skill in the art, utilizes air-flow that powder particle is accelerated to supersonic speed, makes it head-on collision each other and fragmentation.
2) this rare earth based alloy powder and boride are mixed, obtain mixed-powder.
Said boride should pass through dispersion treatment earlier, and addition is the 0.01-5% of rare earth based casting main body powder total weight.Boride is one or more among SiB, MnB, the AlB.The average grain diameter of said boride is the 2-1000 nanometer.
Under preferable case, said preparation process of mixture comprises mixes rare earth based bulk alloy and boride in the presence of oxidation inhibitor, perhaps rare earth based bulk alloy and boride are mixed in the presence of oxidation inhibitor and lubricant; The consumption of said oxidation inhibitor is the 0.1-5 weight % of said material of main part, and the consumption of said lubricant is the 0-5 weight % of said material of main part.The not special restriction of said oxidation inhibitor; The kind of oxidation inhibitor and usage are conventionally known to one of skill in the art; As can be in polyethylene oxide alkyl ethers, PEO list fatty ester, the PEO alkylene ether one or more, can be to foreignize the oxidation inhibitor that the worker produces deeply particularly.The not special restriction of said lubricant, the kind of lubricant and usage are conventionally known to one of skill in the art, as being in gasoline, oleic acid, stearic acid, polyalcohol and polyethylene glycol, anhydro sorbitol, the tristerin one or more.
The mode of said mixing is conventionally known to one of skill in the art, can in batch mixer, evenly mix.
3) with the mixed-powder magnetic field orientating compression moulding that obtains, obtain parison spare.
With the method for mixed-powder compression moulding blank in magnetic field is conventional method, under the preferable case, in the magnetic field orientating moulding press, is compressed to parison spare, and condition does, moulding alignment magnetic field 1.2-2.0T, and moulded blank is through waiting static pressure 10-200 MPa compacting 10-60 second.Further increase the degree of orientation that magnetic can be improved in magnetic field.The compression moulding of parison spare is accomplished in the glove box of sealing fully, makes the magnetic air-isolation, has avoided on the one hand the danger of catching fire because of magnet oxidation heating, has reduced the oxygen content of final magnet on the other hand again.
4) parison spare is carried out sintering and tempering under the condition of vacuum or inert gas shielding, make rare earth-based permanent magnetic material.
The method of sintering and tempering is a conventional method; Under the preferable case, with parison spare under the condition of vacuum or inert gas shielding 1030-1120 ℃ sintering 2-4 hour, passed through again 800-920 ℃ of tempering heat treatment 1-3 hour; Through 500-650 ℃ of tempering 2-4 hour, make the sintering rare-earth based permanent magnetic material again.Carry out the tempering second time and can further improve magnetic property.Because the decomposition temperature of said boride and fusing point be all more than 2000 ℃, therefore, when said temperature sintering, said boride can not decompose and melt.
Said inert gas can be any gas of not participating in reacting, and is preferably one or more of helium, argon gas, neon, krypton gas, xenon.
Embodiment 1
This embodiment is used to explain rare earth-based permanent magnetic material provided by the present invention and preparation method thereof.
1) the rare earth based alloy adopts rapid hardening thin slice technology, and copper roller linear resonance surface velocity is 1.5 meter per seconds, and composition is Nd
10.2(Dy
2.8Tb
1.3) Fe
75.5(Co
2.3Al
0.7Nb
0.3Ga
0.4) B
6.5, get rid of strap thickness and be about 0.3 millimeter.
2) broken through hydrogen crushing furnace hydrogen, inhale hydrogen under the room temperature to saturated, the hydrogen flour was processed in 550 ℃ of dehydrogenations in 6 hours, then under nitrogen protection the employing airflow milling to process average particulate diameter be 5 microns powder.
3) be that the SiB of 20 nanometers adds in the rare earth based alloy powder with average particulate diameter, and to add be polyethylene oxide alkyl ethers (foreignizing the worker deeply produces), then the mixture of gained and 3% the gasoline that accounts for rare earth based alloy powder weight mixed.The consumption of SiB is 2.5% of a rare earth based alloy powder weight, and the consumption of oxidation inhibitor is to account for 3% of rare earth based alloy powder weight.
4) in being full of the glove box of nitrogen, mixed powder is pressed into blank through Magnetic field press, the moulding alignment magnetic field is 1.6T, and pressure is 100 MPas, and the press time is 30 seconds.
5) to put into vacuum degree be 2 * 10 to the blank after the compacting
-2Sintering in the vacuum sintering furnace of handkerchief, 1080 ℃ of following sintering 3 hours, again through 850 ℃ of tempering heat treatment 2 hours, and 550 ℃ of double temperings 3 hours, make rare earth-based permanent magnetic material T1.
Comparative Examples 1
This Comparative Examples is used to prepare the rare earth-based permanent magnetic material that does not contain boride.
Make rare earth-based permanent magnetic material TC1 according to embodiment 1 identical method, difference is not add boride powder.
Embodiment 2
This embodiment is used to explain rare earth-based permanent magnetic material provided by the present invention and preparation method thereof.
Carry out according to embodiment 1, the boride of employing is that average particulate diameter is 1.2 microns a powder, makes rare earth-based permanent magnetic material T2.Carry out according to embodiment 1; Different is to use average particulate diameter to replace SiB for being 50 nanometer MnB, AlB and three kinds of mixed-powders of SiB; Wherein, the consumption of MnB, AlB and SiB is respectively 0.2 weight %, 1 weight % and the 2 weight % that account for rare earth based alloy powder weight; Make rare earth-based permanent magnetic material T2.
Embodiment 3
Carry out according to embodiment 1, the boride of employing is that average particulate diameter is 1.2 microns a powder, makes rare earth-based permanent magnetic material T3.Carry out according to embodiment 1; Different is to use average particulate diameter to replace SiB for being 20 nanometer MnB, AlB and three kinds of mixed-powders of SiB; Wherein, the consumption of MnB, AlB and SiB is respectively 0.05 weight %, 0.05 weight % and the 2 weight % that account for rare earth based alloy powder weight; Make rare earth-based permanent magnetic material T2.
Make rare earth-based permanent magnetic material T3.
Embodiment 4
This embodiment is used to explain rare earth-based permanent magnetic material provided by the present invention and preparation method thereof.
Carry out according to embodiment 1, different is that boride is SiB, and the consumption of SiB is 5% of a bulk alloy total weight, makes rare earth-based permanent magnetic material T4.
Embodiment 5
This embodiment is used to explain rare earth-based permanent magnetic material provided by the present invention and preparation method thereof.
Carry out according to embodiment 1, different is not add oxidation inhibitor and gasoline, makes rare earth-based permanent magnetic material T5.
Embodiment 6
This embodiment is used to explain rare earth-based permanent magnetic material provided by the present invention and preparation method thereof.
Carry out according to embodiment 1, different is that SiB replaces with MnB, makes rare earth-based permanent magnetic material T6.
Embodiment 7
This embodiment is used to explain rare earth-based permanent magnetic material provided by the present invention and preparation method thereof.
Carry out according to embodiment 1, different is that SiB replaces with AlB, makes rare earth-based permanent magnetic material T7.
Embodiment 8
This embodiment is used to explain rare earth-based permanent magnetic material provided by the present invention and preparation method thereof.
Carry out according to embodiment 1, different is to use average particulate diameter to replace SiB for being 50 nanometer MnB and SiB, and wherein, the consumption of MnB and SiB is respectively 0.2 weight % and the 2 weight % that account for rare earth based alloy powder weight; Make rare earth-based permanent magnetic material T8.
Embodiment 9
This embodiment is used to explain rare earth-based permanent magnetic material provided by the present invention and preparation method thereof.
Carry out according to embodiment 1, different is to use average particulate diameter to replace SiB for being 50 nanometer AlB and SiB, and wherein, the consumption of AlB and SiB is respectively 1 weight % and the 2 weight % that account for rare earth based alloy powder weight; Make rare earth-based permanent magnetic material T9.
Embodiment 10
This embodiment is used to explain rare earth-based permanent magnetic material provided by the present invention and preparation method thereof.
1) the rare earth based alloy adopts the casting smelting casting process, and alloy liquation cooled and solidified in the water-cooled copper mould forms ingot casting, and alloying component is Nd
15.2(Pr
1.50Dy
1.2) Fe
75(Al
0.7Cu
0.1) B
6.3(at%).
2) the rare earth based alloy of ingot is carried out coarse crushing through jaw crusher, carries out middle fragmentation through intermediate crusher, and under nitrogen protection, adopting airflow milling to process particle mean size then is 3.6 microns powder.
3) be that the SiB powder of 30 nanometers adds in the rare earth based alloy powder with average particulate diameter, and add oxidation inhibitor, in batch mixer, mix then.The consumption of SiB is 1.2% of a rare earth based alloy powder weight, and the consumption of oxidation inhibitor is 1% of a rare earth based alloy powder weight.
4) in being full of the glove box of nitrogen, mixed powder is pressed into blank through Magnetic field press, the moulding alignment magnetic field is 2.0T, and pressure is 20 MPas, and the press time is 60 seconds.
5) to put into vacuum degree be 2 * 10 to the blank after the compacting
-2Sintering in the vacuum sintering furnace of handkerchief, 1080 ℃ of sintering 4.5 hours, again through 820 ℃ of tempering heat treatment 3 hours, and 500 ℃ of double temperings 4 hours, make rare earth-based permanent magnetic material T9.
Comparative Examples 2
This Comparative Examples is used to prepare the rare earth-based permanent magnetic material that does not contain boride.
Make rare earth-based permanent magnetic material TC2 according to embodiment 9 identical methods, difference is not add the SiB boride powder.
Embodiment 11-20
These embodiment are used to detect the magnetic property and the mechanical property of the rare earth-based permanent magnetic material of embodiment 1-10 preparation.
Adopt the permanent magnetic material different temperatures curve measurement system NIM200C of China National Measuring Science Research Inst. that the rare earth-based permanent magnetic material that embodiment 1-10 prepares is carried out remanent magnetism, magnetic energy product and coercitive measurement; Adopt Shenzhen to think carefully that newly the universal testing machine CMT5105 of group company carries out the test of bending strength to the rare earth-based permanent magnetic material that embodiment 1-10 prepares.Mensuration result is as shown in table 1.
Comparative Examples 3-4
These Comparative Examples are used to detect the magnetic property and the mechanical property of the rare earth-based permanent magnetic material of Comparative Examples 1-2 preparation.
The permanent magnetic material different temperatures curve measurement system NIM200C of employing China National Measuring Science Research Inst. carries out the magnetic property measurement to the rare earth-based permanent magnetic material of Comparative Examples 1-2 preparation; Adopt Shenzhen to think carefully that newly the universal testing machine CMT5105 of group company carries out Mechanics Performance Testing to the rare earth-based permanent magnetic material that Comparative Examples 1-2 prepares.Mensuration result is as shown in table 1.
Table 1
| Sequence number | B r(kGs) | H cj(kOe) | ?(BH) max(MGOe) | Bending strength (MPa) |
| T1 | 11.39 | 27.53 | ?30.1 | 345.11 |
| T2 | 11.30 | 27.68 | ?29.1 | 372.45 |
| T3 | 11.33 | 27.49 | ?29.8 | 362.56 |
| T4 | 11.21 | 27.34 | ?29.1 | 367.85 |
| T5 | 11.36 | 27.50 | ?30.0 | 345.01 |
| T6 | 11.36 | 27.49 | ?30.0 | 340.02 |
| T7 | 11.38 | 27.51 | ?30.1 | 341.00 |
| T8 | 11.35 | 27.65 | ?29.8 | 350.40 |
| T9 | 11.37 | 27.58 | ?30.1 | 352.56 |
| T10 | 11.07 | 21.19 | ?28.6 | 367.82 |
| TC1 | 11.40 | 26.98 | ?29.98 | 337.40 |
| TC2 | 11.09 | 19.89 | ?28.1 | 354.20 |
Can find out that from table 1 rare earth-based permanent magnetic material provided by the invention is at remanent magnetism (B
r) and magnetic energy product (BH)
MaxMagnetic property keep having higher coercive force (H under the constant basically situation
Cj) and the mechanical property improved.The B of rare earth-based permanent magnetic material provided by the invention
r(BH)
MaxWith Comparative Examples much at one, the coercive force of the rare earth-based permanent magnetic material that embodiment 2 provides is up to 27.68kOe, bending strength is up to 372.45 MPas, and the coercive force and the bending strength of Comparative Examples 1 of contrast is respectively 26.98kOe and 337.40 MPas with it; The coercive force of the rare earth-based permanent magnetic material that embodiment 10 provides is 21.19kOe; Bending strength is up to 367.82 MPas; And the coercive force and the bending strength of the Comparative Examples 2 of contrast are respectively 19.89kOe and 354.20 MPas with it; This shows magnetic material provided by the present invention compared with prior art, can all be improved at the coercive force of mechanical property and raising.
Claims (8)
1. rare earth-based permanent magnetic material, this permanent magnetic material contains rare earth based bulk alloy and boride, it is characterized in that, and said boride is one or more among SiB, MnB, the AlB,
Wherein, said rare earth based bulk alloy has the composition shown in the following formula:
R
a(Fe
1-xCo
x)
100-a-b-cM
cB
b
Wherein, a, b, c and x represent atomic percentage separately, 14≤a≤20; 5≤b≤6.5; 0.1≤c≤6; 0≤x≤0.03; Surplus is Fe and unavoidable impurities; R is selected from least a element among rare earth element Pr, Nd, La, Ce, Gd, Dy, Tb, the Ho, and M is selected from least a element among Al, Cu, Ti, V, Cr, Zr, Hf, Mn, Nb, Sn, Mo, Ga, the Si;
The content of said boride is the 0.01-5 weight % of said rare earth based bulk alloy.
2. rare earth-based permanent magnetic material according to claim 1, wherein, said boride is the mixture of two or three among SiB, MnB, the AlB, in the mixture of described boride, the weight ratio of SiB and other boride is 1-20: 1.
3. the preparation method of the described rare earth-based permanent magnetic material of claim 1; This method comprises carries out magnetic field orientating compression moulding with the mixture that contains rare earth based bulk alloy and boride; Under the condition of vacuum or inert gas shielding, carry out sintering and tempering then; Obtain rare earth-based permanent magnetic material, it is characterized in that, said boride is one or more among SiB, MnB, the AlB.
4. method according to claim 3, wherein, the consumption of said boride is the 0.01-5 weight % of said rare earth based bulk alloy.
5. method according to claim 3; Wherein, The said preparation process of mixture that contains rare earth based bulk alloy and boride comprises mixes rare earth based bulk alloy and boride in the presence of oxidation inhibitor, perhaps rare earth based bulk alloy and boride are mixed in the presence of oxidation inhibitor and lubricant; The consumption of said oxidation inhibitor is the 0.1-5 weight % of said rare earth based bulk alloy, and the consumption of said lubricant is the 0-5 weight % of said rare earth based bulk alloy.
6. method according to claim 3, wherein, said rare earth based bulk alloy has the composition shown in the following formula:
Ra(Fe
1-xCo
x)
100-a-b-cM
cB
b
Wherein, a, b, c and x represent atomic percentage separately, 14≤a≤20; 5≤b≤6.5; 0.1≤c≤6; 0≤x≤0.03, surplus are Fe and impurity, and R is selected from least a element among Pr, Nd, La, Ce, Gd, Dy, Tb, the Ho, and M is selected from least a element among Al, Cu, Ti, V, Cr, Zr, Hf, Mn, Nb, Sn, Mo, Ga, the Si.
7. method according to claim 3, wherein, the average particulate diameter of said boride is the 2-1000 nanometer, the average particulate diameter of said rare earth based bulk alloy is the 2-10 micron.
8. method according to claim 3, wherein, the condition of said magnetic field orientating compression moulding comprises that magnetic field intensity is 1.2-2.0T, and pressure is the 10-200 MPa, and the press time is 10-60 second; The condition of said sintering comprises that sintering temperature is 1030-1120 ℃, and sintering time is 2-4 hour; The condition of said tempering comprises that temperature is 500-920 ℃, and tempering time is 2-8 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910107158 CN101877264B (en) | 2009-04-30 | 2009-04-30 | Rare earth-based permanent magnetic material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910107158 CN101877264B (en) | 2009-04-30 | 2009-04-30 | Rare earth-based permanent magnetic material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101877264A CN101877264A (en) | 2010-11-03 |
| CN101877264B true CN101877264B (en) | 2012-12-12 |
Family
ID=43019791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910107158 Active CN101877264B (en) | 2009-04-30 | 2009-04-30 | Rare earth-based permanent magnetic material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101877264B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114210420B (en) * | 2021-12-30 | 2023-08-01 | 湖北蕊源电子股份有限公司 | Preparation method of composite permanent magnet material |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4919732A (en) * | 1988-07-25 | 1990-04-24 | Kubota Ltd. | Iron-neodymium-boron permanent magnet alloys which contain dispersed phases and have been prepared using a rapid solidification process |
| CN1085007A (en) * | 1991-11-11 | 1994-04-06 | 住友特殊金属株式会社 | Alloy powder that rare earth magnet and rare earth magnet are used and manufacture method thereof |
| CN1461486A (en) * | 2001-05-15 | 2003-12-10 | 住友特殊金属株式会社 | Iron-based rare earth alloy nanocomposite magnet and method for producing the same |
| CN1937112A (en) * | 2006-09-21 | 2007-03-28 | 上海交通大学 | Method for increasing neodymium-iron-boron permanent magnetic performance and corrosion-resisting performance |
-
2009
- 2009-04-30 CN CN 200910107158 patent/CN101877264B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4919732A (en) * | 1988-07-25 | 1990-04-24 | Kubota Ltd. | Iron-neodymium-boron permanent magnet alloys which contain dispersed phases and have been prepared using a rapid solidification process |
| CN1085007A (en) * | 1991-11-11 | 1994-04-06 | 住友特殊金属株式会社 | Alloy powder that rare earth magnet and rare earth magnet are used and manufacture method thereof |
| CN1461486A (en) * | 2001-05-15 | 2003-12-10 | 住友特殊金属株式会社 | Iron-based rare earth alloy nanocomposite magnet and method for producing the same |
| CN1937112A (en) * | 2006-09-21 | 2007-03-28 | 上海交通大学 | Method for increasing neodymium-iron-boron permanent magnetic performance and corrosion-resisting performance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101877264A (en) | 2010-11-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101901657B (en) | Sintered NdFeB (neodymium iron boron) permanent magnet material and preparation method thereof | |
| CN101853723B (en) | Composite magnetic material and preparation method thereof | |
| CN101572146B (en) | Nd-Fe-B permanent magnetic material and preparing method thereof | |
| CN100356487C (en) | Method for increasing sintering Nd-Fe-B coercive force by adding nano-oxide in crystal boundary phase | |
| CN102024544B (en) | Rare-earth permanent magnet material and preparation method thereof | |
| CN102237166B (en) | Neodymium iron boron permanent magnet material and preparation method thereof | |
| KR102527128B1 (en) | R-T-B rare earth permanent magnet material, manufacturing method and application | |
| CN111180159B (en) | Neodymium-iron-boron permanent magnet material, preparation method and application | |
| CN101877266B (en) | Sintered neodymium iron boron permanent magnetic material and preparation method thereof | |
| CN102299000A (en) | NdFeB (neodymium iron boron) permanent magnet material and preparation method thereof | |
| CN101447268B (en) | Neodymium iron boron permanent magnetic material and preparation method thereof | |
| WO2021031724A1 (en) | Neodymium iron boron permanent magnet material, and raw material composition thereof, preparaton method therefor and application thereof | |
| CN111655891B (en) | Permanent magnet | |
| JP2006270087A (en) | Method of producing rare-earth sintered magnet | |
| KR102606749B1 (en) | R-T-B series permanent magnet materials, raw material composition, manufacturing method, application | |
| CN101877264B (en) | Rare earth-based permanent magnetic material and preparation method thereof | |
| CN102842399B (en) | A kind of Nd-Fe-Bo permanent magnet material and preparation method thereof | |
| JP7146029B1 (en) | Neodymium-iron-boron permanent magnet and its production method and use | |
| JP3367726B2 (en) | Manufacturing method of permanent magnet | |
| JP4506981B2 (en) | Manufacturing method of rare earth sintered magnet | |
| JP4506973B2 (en) | Method for producing rare earth sintered magnet, method for grinding raw alloy powder for sintered magnet | |
| CN113140400A (en) | Production line system and manufacturing method of neodymium iron boron rare earth permanent magnet material product | |
| JP4671024B2 (en) | Manufacturing method of rare earth sintered magnet | |
| CN111755190A (en) | Alloy for R-T-B-based permanent magnet and method for producing R-T-B-based permanent magnet |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |