CN105063517A - Method for preparing Sm-Co-Fe-Al-B amorphous matrix hard magnetic alloy - Google Patents
Method for preparing Sm-Co-Fe-Al-B amorphous matrix hard magnetic alloy Download PDFInfo
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- CN105063517A CN105063517A CN201510468348.8A CN201510468348A CN105063517A CN 105063517 A CN105063517 A CN 105063517A CN 201510468348 A CN201510468348 A CN 201510468348A CN 105063517 A CN105063517 A CN 105063517A
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Abstract
The invention discloses a method for preparing Sm-Co-Fe-Al-B amorphous matrix hard magnetic alloy, and relates to magnetic materials containing rare-earth metal and magnetic transition metal. The method is for preparing Sm-Co-Fe-Al-B quinary series rapid quenching alloy strips. The method comprises the steps that according to the element composition formula SmxCoyFezAluBv, the atomic percentage of the element component x is 10 to 20, the atomic percentage of the element component y is 50 to 60, the atomic percentage of the element component z is 10 to 15, the atomic percentage of the element component u is 10 to 20, the atomic percentage of the element component v is 5 to 10, and composition proportions meet the formula that x+y+z+u+v=100; and a needed quantity of raw materials are weighed for preparation. The Sm-Co-Fe-Al-B amorphous matrix hard magnetic alloy which is of a special cellular structure and obtained through vacuum melting and a melt rapid quenching technology has high coercivity and overcomes the defect that in the prior art, Sm-Co-Al amorphous alloy does not show hard magnetism or has very poor coercivity.
Description
Technical field
Technical scheme of the present invention relates to the magneticsubstance containing rare earth metal and magnetic transition metal, specifically the preparation method of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy.
Background technology
Non-crystalline state refers to that material internal structure Atom is a kind of state of longrange disorder arrangement.Since late 1980s, with Inoue (InoueA., ZhangT., ZhangW., TakeuchiA.BulkNd-Fe-Alamorphousalloyswithhardmagneticpro perties [J] .MaterialsTransactions, JIM, 1996, 37 (2): 99-108) and Johnson (JohnsonW.L., Physicsandmetallurgyofbulkglassformingalloys, in:TheScienceOfAlloysForThe21stCentury:AHume-RotherySymp osiumCelebration, October18, 2000-October20, 2000, Minerals, MetalsandMaterialsSociety, St.Louis, MO, Unitedstates, 2000, pp.183-199) for Japan of representative and U.S.'s researcher greatly reduce respectively by controlling alloying constituent the critical cooling rate obtaining non-crystal structure, a series of alloy system with very strong amorphous formation ability is developed with traditional slow cooling solidification technology, as the people such as Inoue (InoueA., ZhangT., ZhangW., TakeuchiA.BulkNd-Fe-Alamorphousalloyswithhardmagneticpro perties [J] .MaterialsTransactions, JIM, 1996, 37 (2): 99-108, InoueA., ZhangT.Thermalstabilityandglass-formingabilityofamorphou sNd-Al-TM (TM=Fe, Co, NiorCu) alloys [J] .MatSciEngA-Struct, 1997,226-228:393-396) at room temperature prepare with copper mold casting method the Nd that diameter is 4mm
60fe
30al
10cylinder amorphous, its remanent magnetism is 0.122T, and coercive force reaches 277kA/m (3.5kOe).Document (FanG.J.,
w., RothS., etal.Glass-formingabilityofRE-Al-TMalloys (RE=Sm, Y; TM=Fe, Co, Cu) [J] .ActaMater, 2000,48 (15): 3823-3831) report copper mold casting method obtains as cast condition Sm
60co
10fe
20al
10, Sm
60co
5fe
20al
10cu
5and Sm
60co
15fe
10al
10cu
5amorphous base alloy, but wherein only have Sm
60co
15fe
10al
10cu
5amorphous base alloy shows ferromegnetism behavior, and its coercive force is 28kA/m, remanent magnetism 0.048T, maximal magnetization intensity 0.103T; And Sm
60co
15fe
10al
10cu
5strip non-crystaline amorphous metal does not at room temperature have magnetic yet.CN1869274A discloses a kind of composition range of Sm-Al-Co system Sm base ternary block amorphous alloy, and its composition range is Sm
x(Al
50-yco
50+y)
100-x(x=50 ~ 58at%, y=-10 ~+7at%), best amorphous formation composition is Sm
50al
25co
25, it utilizes copper mold can obtain the bulk amorphous alloy that diameter is 3mm.But, Sm
54al
23co
23, Sm
52al
24co
24, Sm
50al
25co
25bulk amorphous alloy shows as paramagnetism (C.L.Lu in room temperature, H.M.Liu, K.F.Wang, etal.MagneticpropertiesofSm-basedbulkmetallicglasses [J] .JournalofMagnetismandMagneticMaterials, 2010,322 (19): 2845-2850).
In a word, Sm-Co-Al type non-crystaline amorphous metal of the prior art, comprise Sm-Co-Al, Sm-Co-Fe-Al, Sm-Co-Fe-Al-Cu bulk amorphous alloy and all do not show hard magnetic or coercive force is very little, be necessary to research and develop the novel Sm-Co-Al type amorphous base magnetically hard alloy with high-coercive force.
Summary of the invention
Technical problem to be solved by this invention is: the preparation method providing Sm-Co-Fe-Al-B amorphous base magnetically hard alloy, the preparation method of the serial melt spun alloy strip of a kind of Sm-Co-Fe-Al-B five yuan, Sm-Co-Fe-Al-B amorphous base magnetically hard alloy obtained thus has the amorphous based structures of special cellular structure, and obtain high coercive force, overcome Sm-Co-Al type non-crystaline amorphous metal of the prior art and do not show hard magnetic or the very little defect of coercive force.
The present invention solves this technical problem adopted technical scheme: the preparation method of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy, and be the preparation method of the serial melt spun alloy strip of a kind of Sm-Co-Fe-Al-B five yuan, concrete steps are as follows:
The first step, preparation of raw material:
According to element set accepted way of doing sth Sm
xco
yfe
zal
ub
vwherein the atomic percent of elementary composition composition is x=10 ~ 20, y=50 ~ 60, z=10 ~ 15, u=10 ~ 20, v=5 ~ 10, and the composition proportion of x+y+z+u+v=100, Sm, Co, Fe, Al and B that taking needs the purity of quantity to be mass percent>=99.9% prepare, or Sm, Co, Fe, Al and prepare containing the B-Fe alloy of 19wt%B-81wt%Fe, and to add by mentioned component proportioning take the Sm of the 5wt% ~ 10wt% of pure Sm as melting and the compensation of getting rid of volatile quantity in band process, complete preparation of raw material thus;
Second step, prepare mother alloy ingot:
The raw material vacuum arc melting furnace the first step prepared or vacuum induction melting furnace master alloy melting, in stove, low vacuum is in 5 × 10
-2pa, makes whole raw metal melt completely, and fully mixes, obtained mother alloy ingot;
3rd step, the preparation of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy:
The mother alloy ingot prepared by second step loads in melt-spun stove, and in stove, suction is to lower than 5 × 10
-2pa, again melts mother alloy ingot, and with the roller speed of 15m/s ~ 50m/s, alloy is got rid of into strip, the obtained Sm-Co-Fe-Al-B amorphous base magnetically hard alloy with special cellular structure.
The preparation method of above-mentioned Sm-Co-Fe-Al-B amorphous base magnetically hard alloy, the obtained Sm-Co-Fe-Al-B amorphous base magnetically hard alloy with special cellular structure is under the foreign field of 20kOe, its specific magnetising moment is 26.1emu/g ~ 86.6emu/g, remanent magnetism is 12.4emu/g ~ 40.6emu/g, and coercive force is 1034.6Oe ~ 19613.0Oe.
The preparation method of above-mentioned Sm-Co-Fe-Al-B amorphous base magnetically hard alloy, used raw material and equipment obtain by known approach, and operating procedure is that those skilled in the art can grasp.
The invention has the beneficial effects as follows: compared with prior art, outstanding substantive distinguishing features of the present invention is: relevant research shows, although the alloying constituent of Sm-Co-Al, Sm-Co-Fe-Al and Sm-Co-Fe-Al-Cu of high Sm content can obtain the block alloy of full amorphous, its room temperature shows as paramagnetism.One of outstanding substantive distinguishing features of the present invention is: replace the part Co atom in Sm-Co phase with Fe atom, improve the specific magnetising moment of strip; Utilize the low melting point of Al element and and other constituent element between negative mixture heat, add Al to improve the amorphous formation ability of fast quenching thin strap; The atomic radius of B atom is very little, can enter interstitial void, increases atom packing density, makes atom move difficulty, fast after cooling, promotes that the atomic disorder configuration of liquid phase is partly remained, thus in strip, forms the amorphous phase of high-content.Another outstanding substantive distinguishing features of the present invention is: this series alloy has cellular structure, and cellular structure inside is amorphous nano-crystalline composite structure, wherein, Sm-(Co, M) main crystalline phases to be present in born of the same parents in noncrystal substrate with nanocluster form, cell wall is multiple Hard Magnetic, soft magnetism mixes mutually with non-magnetic crystalline state nanometer, by the acting in conjunction of the coupling in born of the same parents with cell wall between different Magnetic Phase and cell wall pinning, amorphous base magnetically hard alloy thin strip magnet is made to obtain excellent hard magnetic property.
Compared with prior art, marked improvement of the present invention is: in Sm-Co-Al alloy, compound with the addition of relatively inexpensive Fe and B or B-Fe alloy, adopt vacuum melting and melt-spun technology, obtain the amorphous base strip of cell structure, the subsequent heat treatment such as subsequent annealing and solid solution aging need not be carried out, thus the inventive method simplifies technique, reduces cost, is conducive to producing in enormous quantities.The Sm-Co-Fe-Al-B amorphous base magnetically hard alloy that the inventive method obtains has the amorphous based structures of special cellular structure, and obtain high coercive force, overcome Sm-Co-Al type non-crystaline amorphous metal of the prior art and do not show hard magnetic or the very little defect of coercive force.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the Sm of embodiment 1
15co
55fe
10al
15b
5the X ray diffracting spectrum of alloy thin strip magnet.
Fig. 2 is the Sm of embodiment 1
15co
55fe
10al
15b
5the scanning electron microscopy picture of alloy thin strip magnet.
Fig. 3 is the Sm of embodiment 1
15co
55fe
10al
15b
5the transmission electron microscope image of alloy thin strip magnet.
Fig. 4 is the Sm of embodiment 1
15co
55fe
10al
15b
5the magnetic hysteresis loop of alloy thin strip magnet.
Fig. 5 is the Sm of embodiment 2
15co
50fe
10al
20b
5the X ray diffracting spectrum of alloy thin strip magnet.
Fig. 6 is the Sm of embodiment 2
15co
50fe
10al
20b
5the scanning electron microscopy picture of alloy thin strip magnet.
Fig. 7 is the Sm of embodiment 2
15co
50fe
10al
20b
5the transmission electron microscope image of alloy thin strip magnet.
Fig. 8 is the Sm of embodiment 2
15co
50fe
10al
20b
5the magnetic hysteresis loop of alloy thin strip magnet.
Fig. 9 is the Sm of embodiment 3
20co
50fe
10al
13b
7the X ray diffracting spectrum of alloy thin strip magnet.
Figure 10 is the Sm of embodiment 3
20co
50fe
10al
13b
7the scanning electron microscopy picture of alloy thin strip magnet.
Figure 11 is the Sm of embodiment 3
20co
50fe
10al
13b
7the magnetic hysteresis loop of alloy thin strip magnet.
Figure 12 is the Sm of embodiment 4
10co
60fe
15al
10b
5the X ray diffracting spectrum of alloy thin strip magnet.
Figure 13 is the Sm of embodiment 4
10co
60fe
15al
10b
5the scanning electron microscopy picture of alloy thin strip magnet.
Figure 14 is the Sm of embodiment 4
10co
60fe
15al
10b
5the magnetic hysteresis loop of alloy thin strip magnet.
Figure 15 is the Sm of embodiment 5
20co
50fe
15al
10b
5the X ray diffracting spectrum of alloy thin strip magnet.
Figure 16 is the Sm of embodiment 5
20co
50fe
15al
10b
5the magnetic hysteresis loop of alloy thin strip magnet.
Figure 17 is the Sm of embodiment 6
15co
50fe
10al
15b
10the X ray diffracting spectrum of alloy thin strip magnet.
Figure 18 is the Sm of embodiment 6
15co
50fe
10al
15b
10the magnetic hysteresis loop of alloy thin strip magnet.
Embodiment
Embodiment 1
The Sm of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy
15co
55fe
10al
15b
5the preparation method of magnet.
The first step, preparation of raw material:
According to element set accepted way of doing sth Sm
15co
55fe
10al
15b
5atomic percent composition proportion, take and need the purity of quantity be Sm, Co, Fe, Al of mass percent>=99.9% and prepare containing the B-Fe alloy of 19wt%B-81wt%Fe, and to add by mentioned component proportioning take the Sm of the 8wt% of pure Sm as melting and the compensation of getting rid of volatile quantity in band process, complete preparation of raw material thus;
Second step, prepare mother alloy ingot:
The raw material vacuum arc melting furnace master alloy melting the first step prepared, in stove, low vacuum is in 5 × 10
-2pa, makes whole raw metal melt completely, and fully mixes, obtained Sm
15co
55fe
10al
15b
5mother alloy ingot;
3rd step, the preparation of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy:
Sm prepared by second step
15co
55fe
10al
15b
5mother alloy ingot loads in melt-spun stove, and in stove, suction is to lower than 5 × 10
-2pa, melts this mother alloy ingot again, and with the roller speed of 40m/s, alloy is got rid of into strip, and obtained Sm-Co-Fe-Al-B amorphous base magnetically hard alloy is the Sm with special cellular structure
15co
55fe
10al
15b
5amorphous base magnetically hard alloy.
This born of the same parents' shape Sm
15co
55fe
10al
15b
5the thickness of amorphous base magnetically hard alloy strip is 35 μm, and its X ray diffracting spectrum as shown in Figure 1, can see obvious diffuse scattering peak in this collection of illustrative plates, shows to define more amorphous phase in this alloy, and certainly has Sm (Co, M)
7phase, Sm
2(Co, M)
7phase, Sm
2co
7b
3phase, Al
192.40fe
42.66phase and Sm
2fe
15al
2the diffraction peak of phase, illustrates that this alloy thin strip magnet thing phase composite is that non-crystalline state matrix and crystalline phases coexist, its principal crystalline phase Sm (Co, M)
7average grain size be 20nm.Fig. 2 is Sm
15co
55fe
10al
15b
5the scanning electron microscopy picture of thin strip magnet, its microtexture showing this alloy is the petal-shaped formed by the structure of a lot of walnut kernel shape, and grain size differs, and illustrates that the microscopic appearance of this alloy is heterogeneous coefficient result.Fig. 3 is Sm
15co
55fe
10al
15b
5the transmission electron microscope image of thin strip magnet, it shows this alloy thin band inside and defines oval cellular structure, and cellular structure is of a size of 100nm ~ 0.1 μm, and wherein cell wall is wide is 20-50nm, comprises multiple crystalline phases; Born of the same parents inner tissue is the composite structure of amorphous and crystalline state nanometer phase.Sm obtained by the present embodiment
15co
55fe
10al
15b
5amorphous base magnetically hard alloy thin strip magnet at room temperature, after magnetizing in 60kOe foreign field, outside magnetic field be 20kOe vibrating sample magnetometer on measure magnetic property, its coercive force is 19613.0Oe, remanent magnetism is 32.7emu/g, and maximal magnetization intensity is 37.0emu/g, and its magnetic hysteresis loop is shown in Fig. 4.
Embodiment 2
The Sm of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy
15co
50fe
10al
20b
5the preparation method of magnet.
The first step, preparation of raw material:
According to element set accepted way of doing sth Sm
15co
50fe
10al
20b
5atomic percent composition proportion, take and need the purity of quantity be Sm, Co, Fe, Al of mass percent>=99.9% and prepare containing the B-Fe alloy of 19wt%B-81wt%Fe, and to add by mentioned component proportioning take the Sm of the 7wt% of pure Sm as melting and the compensation of getting rid of volatile quantity in band process, complete preparation of raw material thus;
Second step, prepare mother alloy ingot:
The raw material vacuum induction melting furnace master alloy melting the first step prepared, in stove, low vacuum is in 5 × 10
-2pa, makes whole raw metal melt completely, and fully mixes, obtained Sm
15co
50fe
10al
20b
5mother alloy ingot;
3rd step, the preparation of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy:
The mother alloy ingot prepared by second step loads in melt-spun stove, and in stove, suction is to lower than 5 × 10
-2pa, again melts mother alloy ingot, and with the roller speed of 35m/s, alloy is got rid of into strip, and obtained Sm-Co-Fe-Al-B amorphous base magnetically hard alloy is the Sm with special cellular structure
15co
50fe
10al
20b
5amorphous base magnetically hard alloy.
This born of the same parents' shape Sm
15co
55fe
10al
15b
5the thickness of amorphous base magnetically hard alloy strip is 40 μm, and as shown in Figure 5, Fig. 1 that the intensity that this collection of illustrative plates demonstrates diffraction peak is compared in embodiment 1 have dropped half to its X ray diffracting spectrum, and born of the same parents' shape Sm that the present embodiment is obtained is described
15co
50fe
10al
20b
5crystalline phases in amorphous base magnetically hard alloy is less, but still there is Sm (Co, M)
7phase, Sm
2(Co, M)
7phase, Sm
2co
7b
3phase, Al
192.40fe
42.66phase and Sm
2fe
15al
2the diffraction peak of phase, principal crystalline phase Sm (Co, M)
7grain-size be 17.0nm.Fig. 6 is Sm
15co
50fe
10al
20b
5the scanning electron microscopy picture of amorphous base magnetically hard alloy strip, its microscopic appearance showing this alloy is random reticulated structure.Fig. 7 is Sm
15co
50fe
10al
20b
5the transmission electron microscope image of alloy thin strip magnet, it shows the polygon-shaped cellular structure of this alloy thin band, and cellular structure is of a size of 100 ~ 200nm, and cell wall width is less than 20nm.Sm obtained by the present embodiment
15co
50fe
10al
20b
5after amorphous base magnetically hard alloy thin strip magnet magnetizes in 60kOe foreign field, outside magnetic field be 20kOe vibrating sample magnetometer on measure magnetic property, its coercive force is 12820.0Oe, and remanent magnetism is 27.9emu/g, maximal magnetization intensity is 35.8emu/g, and its magnetic hysteresis loop is shown in Fig. 8.
Embodiment 3
The Sm of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy
20co
50fe
10al
13b
7the preparation method of magnet.
The first step, preparation of raw material:
According to element set accepted way of doing sth Sm
20co
50fe
10al
13b
7atomic percent composition proportion, Sm, Co, Fe, Al and B that taking needs the purity of quantity to be mass percent>=99.9% prepare, and to add by mentioned component proportioning take the Sm of the 5wt% of pure Sm as melting and the compensation of getting rid of volatile quantity in band process, complete preparation of raw material thus;
Second step, prepare mother alloy ingot:
The raw material vacuum arc melting furnace master alloy melting the first step prepared, in stove, low vacuum is in 5 × 10
-2pa, makes whole raw metal melt completely, and fully mixes, obtained Sm
20co
50fe
10al
13b
7mother alloy ingot;
3rd step, the preparation of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy:
The mother alloy ingot prepared by second step loads in melt-spun stove, and in stove, suction is to lower than 5 × 10
-2pa, again melts mother alloy ingot, and with the roller speed of 40m/s, alloy is got rid of into strip, and obtained Sm-Co-Fe-Al-B amorphous base magnetically hard alloy is the Sm with special cellular structure
20co
50fe
10al
13b
7amorphous base magnetically hard alloy.
This born of the same parents' shape Sm
20co
50fe
10al
13b
7the thickness of amorphous base magnetically hard alloy strip is 30 μm, and as shown in Figure 9, it is lower and there occurs obvious broadening that this collection of illustrative plates demonstrates the intensity of diffraction peak to its X ray diffracting spectrum, illustrates that main crystalline phases is SmCo wherein containing a large amount of amorphous
7, Sm
2co
7, SmCo
2and AlFe.Figure 10 is Sm
20co
50fe
10al
13b
7the scanning electron microscopy picture of alloy thin strip magnet, therefrom sees at Sm
20co
50fe
10al
13b
7the noncrystal substrate of amorphous base magnetically hard alloy is dispersed with the hole of the crystalline phases be corroded.Sm obtained by the present embodiment
20co
50fe
10al
13b
7after amorphous base magnetically hard alloy thin strip magnet magnetizes in 60kOe foreign field, outside magnetic field be 20kOe vibrating sample magnetometer on measure magnetic property, its coercive force is 10898.0Oe, and remanent magnetism is 24.1emu/g, maximal magnetization intensity is 26.1emu/g, and its magnetic hysteresis loop is shown in Figure 11.
Embodiment 4
The Sm of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy
10co
60fe
15al
10b
5the preparation method of magnet.
The first step, preparation of raw material:
According to element set accepted way of doing sth Sm
10co
60fe
15al
10b
5atomic percent composition proportion, take and need the purity of quantity be Sm, Co, Fe, Al of mass percent>=99.9% and prepare containing the B-Fe alloy of 19wt%B-81wt%Fe, and to add by mentioned component proportioning take the Sm of the 10wt% of pure Sm as melting and the compensation of getting rid of volatile quantity in band process, complete preparation of raw material thus;
Second step, prepare mother alloy ingot:
The raw material vacuum induction melting furnace master alloy melting the first step prepared, in stove, low vacuum is in 5 × 10
-2pa, makes whole raw metal melt completely, and fully mixes, obtained Sm
10co
60fe
15al
10b
5mother alloy ingot;
3rd step, the preparation of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy:
The mother alloy ingot prepared by second step loads in melt-spun stove, and in stove, suction is to lower than 5 × 10
-2pa, again melts mother alloy ingot, and with the roller speed of 50m/s, alloy is got rid of into strip, and obtained Sm-Co-Fe-Al-B amorphous base magnetically hard alloy is the Sm with special cellular structure
10co
60fe
15al
10b
5amorphous base magnetically hard alloy.
This born of the same parents' shape Sm
10co
60fe
15al
10b
5the thickness of amorphous base magnetically hard alloy strip is 25 μm, and as shown in figure 12, this collection of illustrative plates demonstrates born of the same parents' shape Sm to its X ray diffracting spectrum
10co
60fe
15al
10b
5the main crystalline phases of amorphous base magnetically hard alloy is Sm
2co
17, CoFe, SmCo
3b
2and FeB.Figure 13 is Sm
10co
60fe
15al
10b
5the scanning electron microscopy picture of alloy thin strip magnet, this figure shows in this alloy thin band containing a large amount of crystalline phases.Sm obtained by the present embodiment
10co
60fe
15al
10b
5after amorphous base magnetically hard alloy thin strip magnet magnetizes in 60kOe foreign field, outside magnetic field be 20kOe vibrating sample magnetometer on measure magnetic property, its coercive force is 1034.6Oe, and remanent magnetism is 12.4emu/g, maximal magnetization intensity is 86.6emu/g, and its magnetic hysteresis loop is shown in Figure 14.
Embodiment 5
The Sm of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy
20co
50fe
15al
10b
5the preparation method of magnet.
The first step, preparation of raw material:
According to element set accepted way of doing sth Sm
20co
50fe
15al
10b
5atomic percent composition proportion, take and need the purity of quantity be Sm, Co, Fe, Al of mass percent>=99.9% and prepare containing the B-Fe alloy of 19wt%B-81wt%Fe, and to add by mentioned component proportioning take the Sm of the 5wt% of pure Sm as melting and the compensation of getting rid of volatile quantity in band process, complete preparation of raw material thus;
Second step, prepare mother alloy ingot:
The raw material vacuum arc melting furnace master alloy melting the first step prepared, in stove, low vacuum is in 5 × 10
-2pa, makes whole raw metal melt completely, and fully mixes, obtained Sm
20co
50fe
15al
10b
5mother alloy ingot;
3rd step, the preparation of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy:
The mother alloy ingot prepared by second step loads in melt-spun stove, and in stove, suction is to lower than 5 × 10
-2pa, again melts mother alloy ingot, and with the roller speed of 15m/s, alloy is got rid of into strip, and obtained Sm-Co-Fe-Al-B amorphous base magnetically hard alloy is the Sm with special cellular structure
20co
50fe
15al
10b
5amorphous base magnetically hard alloy.
This born of the same parents' shape Sm
20co
50fe
15al
10b
5the thickness of amorphous base magnetically hard alloy strip is 50 μm, and as shown in figure 15, this collection of illustrative plates demonstrates born of the same parents' shape Sm to its X ray diffracting spectrum
20co
50fe
15al
10b
5containing a certain amount of amorphous in amorphous base magnetically hard alloy strip, main crystalline phases is SmCo
7, Sm
2co
7, SmCo
2and Al
13co
4.Sm obtained by the present embodiment
20co
50fe
15al
10b
5after amorphous base magnetically hard alloy thin strip magnet magnetizes in 60kOe foreign field, outside magnetic field be 20kOe vibrating sample magnetometer on measure magnetic property, its coercive force is 6800.9Oe, and remanent magnetism is 40.6emu/g, maximal magnetization intensity is 48.9emu/g, and its magnetic hysteresis loop is shown in Figure 16.
Embodiment 6
The Sm of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy
15co
50fe
10al
15b
10the preparation method of magnet.
The first step, preparation of raw material:
According to element set accepted way of doing sth Sm
15co
50fe
10al
15b
10atomic percent composition proportion, Sm, Co, Fe, Al and B that taking needs the purity of quantity to be mass percent>=99.9% prepare, and to add by mentioned component proportioning take the Sm of the 9wt% of pure Sm as melting and the compensation of getting rid of volatile quantity in band process, complete preparation of raw material thus;
Second step, prepare mother alloy ingot:
The raw material vacuum induction melting furnace master alloy melting the first step prepared, in stove, low vacuum is in 5 × 10
-2pa, makes whole raw metal melt completely, and fully mixes, obtained Sm
15co
50fe
10al
15b
10mother alloy ingot;
3rd step, the preparation of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy:
The mother alloy ingot prepared by second step loads in melt-spun stove, and in stove, suction is to lower than 5 × 10
-2pa, again melts mother alloy ingot, and with the roller speed of 30m/s, alloy is got rid of into strip, and obtained Sm-Co-Fe-Al-B amorphous base magnetically hard alloy is the Sm with special cellular structure
15co
50fe
10al
15b
10amorphous base magnetically hard alloy.
This born of the same parents' shape Sm
15co
50fe
10al
15b
10the thickness of amorphous base magnetically hard alloy strip is 42 μm, its X ray diffracting spectrum as shown in figure 17, born of the same parents' shape Sm
15co
50fe
10al
15b
10containing a certain amount of amorphous in amorphous base magnetically hard alloy strip, main crystalline phases is SmCo
7, Sm
2co
7, Sm
2co
7b
3, AlFe and SmFe
2.The Sm that the present embodiment is obtained
15co
50fe
10al
15b
10after amorphous base magnetically hard alloy thin strip magnet magnetizes in 60kOe foreign field, outside magnetic field be 20kOe vibrating sample magnetometer on measure magnetic property, its coercive force is 17186.0Oe, and remanent magnetism is 25.4emu/g, maximal magnetization intensity is 30.4emu/g, and its magnetic hysteresis loop is shown in Figure 18.
In above-described embodiment, because the boiling point of Sm is lower, thus respectively add by an element set accepted way of doing sth composition proportion take the Sm of the 5wt% ~ 10wt% of pure Sm as melting and the compensation of getting rid of volatile quantity in band process.
Raw materials used in above-described embodiment is all commercially available commodity, and the purity of Sm, Co, Fe, B and B-Fe alloy is mass percent >=99.9%; Equipment and process used is all common equipment well-known in the art and technique.
Claims (2)
- The preparation method of 1.Sm-Co-Fe-Al-B amorphous base magnetically hard alloy, is characterized in that: the preparation method being the serial melt spun alloy strip of a kind of Sm-Co-Fe-Al-B five yuan, and concrete steps are as follows:The first step, preparation of raw material:According to element set accepted way of doing sth Sm xco yfe zal ub vwherein the atomic percent of elementary composition composition is x=10 ~ 20, y=50 ~ 60, z=10 ~ 15, u=10 ~ 20, v=5 ~ 10, and the composition proportion of x+y+z+u+v=100, Sm, Co, Fe, Al and B that taking needs the purity of quantity to be mass percent>=99.9% prepare, or Sm, Co, Fe, Al and prepare containing the B-Fe alloy of 19wt%B-81wt%Fe, and to add by mentioned component proportioning take the Sm of the 5wt% ~ 10wt% of pure Sm as melting and the compensation of getting rid of volatile quantity in band process, complete preparation of raw material thus;Second step, prepare mother alloy ingot:The raw material vacuum arc melting furnace the first step prepared or vacuum induction melting furnace master alloy melting, in stove, low vacuum is in 5 × 10 -2pa, makes whole raw metal melt completely, and fully mixes, obtained mother alloy ingot;3rd step, the preparation of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy:The mother alloy ingot prepared by second step loads in melt-spun stove, and in stove, suction is to lower than 5 × 10 -2pa, again melts mother alloy ingot, and with the roller speed of 15m/s ~ 50m/s, alloy is got rid of into strip, the obtained Sm-Co-Fe-Al-B amorphous base magnetically hard alloy with special cellular structure.
- 2. the preparation method of Sm-Co-Fe-Al-B amorphous base magnetically hard alloy according to claim 1, it is characterized in that: the obtained Sm-Co-Fe-Al-B amorphous base magnetically hard alloy with special cellular structure is under the foreign field of 20kOe, its specific magnetising moment is 26.1emu/g ~ 86.6emu/g, remanent magnetism is 12.4emu/g ~ 40.6emu/g, and coercive force is 1034.6Oe ~ 19613.0Oe.
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CN105529124A (en) * | 2016-01-19 | 2016-04-27 | 兆晶股份有限公司 | Preparation method of iron-based non-crystal magnetic powder core |
CN106847453A (en) * | 2017-03-27 | 2017-06-13 | 河北工业大学 | A kind of SmCo4B base permanent magnetism strips and preparation method thereof |
CN112342475A (en) * | 2020-10-13 | 2021-02-09 | 东南大学 | Microalloyed heavy rare earth based amorphous alloy and preparation method and application thereof |
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JPH11310807A (en) * | 1998-04-30 | 1999-11-09 | Nichia Chem Ind Ltd | Production of rare earth-transition metal alloy powder |
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CN105529124A (en) * | 2016-01-19 | 2016-04-27 | 兆晶股份有限公司 | Preparation method of iron-based non-crystal magnetic powder core |
CN106847453A (en) * | 2017-03-27 | 2017-06-13 | 河北工业大学 | A kind of SmCo4B base permanent magnetism strips and preparation method thereof |
CN106847453B (en) * | 2017-03-27 | 2018-08-17 | 河北工业大学 | A kind of SmCo4B base permanent magnetism strips and preparation method thereof |
CN112342475A (en) * | 2020-10-13 | 2021-02-09 | 东南大学 | Microalloyed heavy rare earth based amorphous alloy and preparation method and application thereof |
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