CN1649183A - Fe-Ga magnetiostriction material of low field large magnetostrain and its preparing method - Google Patents
Fe-Ga magnetiostriction material of low field large magnetostrain and its preparing method Download PDFInfo
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- CN1649183A CN1649183A CN200510053908.XA CN200510053908A CN1649183A CN 1649183 A CN1649183 A CN 1649183A CN 200510053908 A CN200510053908 A CN 200510053908A CN 1649183 A CN1649183 A CN 1649183A
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- 239000000463 material Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000000126 substance Substances 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000000725 suspension Substances 0.000 claims abstract description 4
- 239000000956 alloy Substances 0.000 claims description 31
- 229910045601 alloy Inorganic materials 0.000 claims description 30
- 239000007789 gas Substances 0.000 claims description 20
- 238000007711 solidification Methods 0.000 claims description 20
- 230000008023 solidification Effects 0.000 claims description 20
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 11
- 229910052786 argon Inorganic materials 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 238000005275 alloying Methods 0.000 claims description 6
- 238000005266 casting Methods 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 239000011261 inert gas Substances 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000004857 zone melting Methods 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims 1
- 238000002360 preparation method Methods 0.000 abstract description 10
- 238000007906 compression Methods 0.000 abstract description 2
- 230000006835 compression Effects 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 238000003723 Smelting Methods 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 14
- 239000013078 crystal Substances 0.000 description 6
- 238000002441 X-ray diffraction Methods 0.000 description 4
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 3
- 229910000846 In alloy Inorganic materials 0.000 description 3
- 239000012809 cooling fluid Substances 0.000 description 3
- 229910052733 gallium Inorganic materials 0.000 description 3
- 238000000059 patterning Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 229910017709 Ni Co Inorganic materials 0.000 description 2
- 229910003267 Ni-Co Inorganic materials 0.000 description 2
- 229910003262 Ni‐Co Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910020637 Co-Cu Inorganic materials 0.000 description 1
- 229910020516 Co—V Inorganic materials 0.000 description 1
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 229910052692 Dysprosium Inorganic materials 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- 229910052771 Terbium Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 229910001338 liquidmetal Inorganic materials 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000003870 refractory metal Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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Abstract
This invention discloses a magnetostrictive material Fe-Ga of low field magnetostrictive strain and its preparation method. The chemical formula is: Fe1-xGax, and X=0.15-0.30. The preparation method is that a raw material is melted to a bar first, then a suspension zone smelting method is applied to directionally solid and prepare the magnetostrictive material, which gets the largest magneto-strain: 87x0.000001-294x0.000001, room temperature yield strength 400Mpa-500Mpa, the compression strength: 900Mpa-1000Mpa, plastic deformation: smaller than 3% at the low field: 20KA/m-40KA/m.
Description
Technical field
The present invention relates to a kind of magnetostrictive material and preparation method thereof, more particularly, be meant a kind ofly have Fe-Ga magnetostrictive material of big magnetostriction performance and preparation method thereof at a low 20kA/m～40kA/m.
Background technology
The variation of shape or size can take place in ferromagnet under the effect in magnetic field, this phenomenon is called as magnetostriction.Nearly all ferrimagnet all has Magnetostrictive Properties.Early stage magnetostrictive material such as nickel-base alloy (Ni, the Ni-Co alloy, the Ni-Co-Cr alloy), ferrous alloy (Fe-Ni alloy, the Fe-Al alloy, the Fe-Co-V alloy) and ferrite mangneto telescopic material (Ni-Co and Ni-Co-Cu Ferrite Material etc.) have favorable mechanical performance and shock resistance, but its magnetostriction poor-performing, magneto-strain has only 10 * 10
-6～50 * 10
-6It is found that rare earth giant magnetostrictive material afterwards.Tb
xDy
1-xThe magnetostriction alloy material has very big basal plane magnetostriction and (is about 10000 * 10
-6), but its low ordering temperature has limited the application that it can only be at low temperatures.RFe
2(R is a rare earth element) intermetallic compound, as the TbDyFe alloy, it consists of (Dy
xTb
1-x) Fe
2, have very big magnetostriction and high Curie temperature and (more than room temperature, have and be approximately 2000 * 10
-6Magnetostriction).This TbDyFe alloy also has the shortcoming of himself when having superior magnetostriction performance, for example it requires high saturation magnetic field, and character is very crisp, and (because price height of terbium and dysprosium) costs an arm and a leg.Therefore, low the big strain magnetostrictive material that a kind of cheapness and mechanical property are good become the emphasis that people pay close attention to.
Direction of easy axis under the FeGa alloy normal temperature is＜100〉crystallographic direction, when the preferred orientation of crystal growth is consistent with direction of easy axis, and when promptly preferred orientation is＜100〉direction, the magnetostrictive strain maximum.Therefore prepare＜100〉preferred orientation polycrystalline or monocrystalline are the key technologies that obtains high-quality FeGa magnetostrictive material.
Based on above 2 points, the inventor adopts the method for magnetic suspension zone-melting process directional solidification, successfully prepared have vertically the height preferred orientation＜100〉orientation polycrystalline bars, and the test shows bar has low good magnetostriction performance.
Summary of the invention
One of purpose of the present invention is to propose a kind of Fe-Ga magnetostrictive material with good Magnetostrictive Properties that obtain maximum magneto-strain under low 20kA/m～40kA/m.
Another object of the present invention provides a kind of method for preparing Fe-Ga magnetiostriction material of low field large magnetostrain.
A kind of Fe-Ga magnetiostriction material of low field large magnetostrain of the present invention, its chemical formula is: Fe
1-xGa
x, X=0.15～0.30 wherein.
Described Fe-Ga magnetiostriction material of low field large magnetostrain, its chemical formula also can be Fe
1-xGa
x, X=0.17～0.21 wherein.
Described Fe-Ga magnetiostriction material of low field large magnetostrain, its composition are Fe
0.82Ga
0.18Perhaps Fe
0.81Ga
0.19Perhaps Fe
0.73Ga
0.27
Described Fe-Ga magnetiostriction material of low field large magnetostrain, its downfield environment is 20kA/m～40kA/m, magneto-strain is 87 * 10
-6～294 * 10
-6, yield strength 400MPa～500MPa, compressive strength 900Mpa～1000MPa, amount of plastic deformation is less than 30%.
A kind of method for preparing Fe-Ga magnetiostriction material of low field large magnetostrain of the present invention comprises the following steps:
The first step: the cast alloy charge bar, will put into the water cooled copper mould of vacuum arc furnace ignition after Fe, the weighing of Ga raw material earlier, regulate the vacuum degree 2 * 10 of vacuum chamber
-3Pa～4 * 10
-3Pa feeds inert gas and makes protection gas, treat that alloying element melts fully after, current interruption forms alloy pig, and alloy pig is overturn, and carries out melting again, melt back makes for 3～5 times the composition in the alloy even, the ingot casting fusing is inhaled cast bar then, and is stand-by;
Second step: will the above-mentioned Fe-Ga bar that makes put into the alundum tube of directional solidification high-temperature gradient vaccum sensitive stove, the interior vacuum degree 4 * 10 of adjusting vacuum chamber
-3Pa; feed inert gas and make protection gas; regulate directional solidification high-temperature gradient vaccum sensitive stove heating current; 400～700 ℃/cm of control temperature gradient, rate of crystalline growth 10～720mm/h; realize high-temperature gradient directional solidification, obtain along bar axial＜100〉preferred orientation Fe-Ga magnetiostriction material of low field large magnetostrain.
The advantage of Fe-Ga magnetiostriction material of low field large magnetostrain of the present invention is: downfield 20kA/m～40kA/m produces large magneto-strain 87 * 10 down
-6～294 * 10
-6, high strength, good toughness, magnetic hysteresis is little, cost is lower, high relative permeability, low magnetocrystalline anisotropy, low magnetostriction temperature coefficient etc.
Material preparation process advantage of the present invention is: do not need crucible, melt only contacts with the solid of itself, and pollution can be reduced to bottom line.Therefore, suitable those have the material of very strong solvability (or reactivity) when melting temperature especially.In addition, because heating-up temperature is not subjected to the restriction of crucible fusing point, the high material of fusing point of therefore can growing is as refractory oxide monocrystalline, carbide single crystal, refractory metal monocrystalline etc.
Description of drawings
Fig. 1 is＜100〉oriented crystal cross section x x ray diffraction collection of illustrative plates.
Fig. 2 is the x x ray diffraction collection of illustrative plates that does not have orientation as cast condition sample.
Fig. 3 is a Fe-Ga magnetostrictive material compression performance curve chart.
Fig. 4 is Fe
0.82Ga
0.18Magnetostrictive material are at [100] of 720mm/h growth orientation magneto-strain result curve figure.
Fig. 5 is Fe
0.81Ga
0.19Magnetostrictive material are at [100] of 10mm/h growth orientation magneto-strain result curve figure.
Fig. 6 is Fe
0.73Ga
0.27Magnetostrictive material are at [100] of 20mm/h growth orientation magneto-strain result curve figure.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The present invention is a kind of Fe-Ga magnetiostriction material of low field large magnetostrain, and its chemical formulation is: Fe
1-xGa
xX=0.15～0.30 wherein, X also can be the span of X=0.17～0.21.
In the present invention, the preparation Fe-Ga magnetiostriction material of low field large magnetostrain comprises the following steps:
The first step: the cast alloy charge bar, will put into the water cooled copper mould of vacuum arc furnace ignition after Fe, the weighing of Ga raw material earlier, regulate the vacuum degree 2 * 10 of vacuum chamber
-3Pa～4 * 10
-3Pa feeds inert gas shielding gas, treat that alloying element melts fully after, current interruption forms alloy pig, and alloy pig is overturn, and carries out melting again, melt back makes for 3～5 times the composition in the alloy even, the ingot casting fusing is inhaled cast bar then, and is stand-by;
Second step: will the above-mentioned Fe-Ga bar that makes put into the alundum tube of directional solidification high-temperature gradient vaccum sensitive stove, the interior vacuum degree 4 * 10 of adjusting vacuum chamber
-3Pa; feed inert gas and make protection gas; regulate directional solidification high-temperature gradient vaccum sensitive stove heating current and control 400～700 ℃/cm of temperature gradient, rate of crystalline growth 10～720mm/h; realize high-temperature gradient directional solidification, obtain along bar axial＜100〉preferred orientation Fe-Ga magnetiostriction material of low field large magnetostrain.In this course of processing, adopt magnetic suspension zone-melting process directional solidification to prepare Fe-Ga magnetiostriction material of low field large magnetostrain, this method adopts high-frequency induction heating, can make the increase of sample local overheating degree and cause zone melting, select for use the method for extremely strong liquid metal alloy of cooling capacity and the compound cooling of cooling water to cool off, to realize the ultra-high temperature gradient.Behind the stable growth, the drawing velocity of directional solidification is rate of crystalline growth.
The above-mentioned Fe-Ga magnetiostriction material of low field large magnetostrain that makes is cut sample with wire cutting method, adopt material mechanics experiment machine (MTS) to carry out the room-temperature mechanical property test, its yield strength 400MPa～500MPa, compressive strength 900Mpa～1000MPa, amount of plastic deformation is less than 30% (as shown in Figure 3).Employing standard four contact resistance strain gauge methods carry out the magneto-strain test, and its magnetostriction performance is as shown in table 1.
The magnetostriction performance of table 1 Fe-Ga magnetiostriction material of low field large magnetostrain
| The speed of growth (mm/h) | Temperature gradient (℃/cm) | Strain saturation magnetic field (kA/m) | Magneto-strain (* 10 -6) | ||
| No precompression | ??46Mpa | ??74Mpa | |||
| ????720 | ????～500 | ????20～40 | ????97 | ??250 | ??258 |
| ????240 | ????～500 | ????20～40 | ????72 | ??108 | ??115 |
| ????120 | ????～500 | ????20～40 | ????116 | ??135 | ??152 |
| ????20 | ????～500 | ????20～40 | ????169 | ??254 | ??271 |
| ????10 | ????～500 | ????20～40 | ????128 | ??288 | ??294 |
As can be seen from the above table, the speed of growth is nearly [100] orientation when 720mm/h, and the magneto-strain top performance is 258 * 10
-6The speed of growth is [100] orientation when 20～10mm/h, and the magneto-strain top performance is 294 * 10
-6Orientation is relatively poor during 240～120mm/h, magneto-strain top performance 152 * 10
-6
The sample that cuts is carried out the crystal orientation test, and Fig. 1 is＜100〉oriented crystal cross section x x ray diffraction collection of illustrative plates, and Fig. 2 is not for there being the x x ray diffraction collection of illustrative plates of orientation as cast condition sample; Among the figure as can be seen: (200) peak intensity strengthens rapidly after the directional solidification.Can think that this material is＜100〉axial preferred orientation.Utilize XRD utmost point map analysis instrument to { the diffraction pattern test result of 100} face confirms crystal growth direction near [100] direction, and deviation is about 5 °～10 ° on the bar-shaped sample end face utmost point figure.
Embodiment 1: preparation low field large magnetostrain strain Fe
0.82Ga
0.18Magnetostrictive material
With electronic balance weighing Fe 20.8010 grams, Ga 5.7006 grams, and put it in the interior water cooled copper mould of vacuum arc furnace ignition, regulate the vacuum degree 2 * 10 in the vacuum arc furnace ignition
-3Pa feeds high-purity argon gas and makes protection gas, treat that alloying element melts fully after, current interruption forms alloy pig, and alloy pig is overturn, and carries out melting again, melt back makes for 4 times the composition in the alloy even; Then ingot casting is melted once more the back suction and cast diameter 6.8mm * 80mm cylinder bar; The cylinder bar that makes is put into the Al of directional solidification high-temperature gradient vaccum sensitive stove
2O
3In the crucible, as cooling fluid, regulate the vacuum degree 4 * 10 in the vacuum chamber with the gallium indium alloy
-3Pa; feed high-purity argon gas and make protection gas; by regulating vaccum sensitive stove temperature gradient～500 ℃/cm, carrying out oriented growth with the setting rate of 720mm/h, realize high-temperature gradient directional solidification, obtain low field large magnetostrain strain Fe along the axial height of bar＜100〉preferred orientation
0.81Ga
0.19Magnetostrictive material.Adopt the line patterning method to cut out one section long sample of 25mm, sample is carried out Mechanics Performance Testing, its test result is yield strength 450MPa, compressive strength 920MPa.Employing standard four contact resistance strain gauge methods carry out the magneto-strain test under 0Mpa, 46Mpa, 74MPa.Measured result as shown in Figure 4.Maximum mangneto strain value is 97 * 10 under no pressure condition
-6, increasing during 46MPa is 250 * 10
-6, when continuing to increase compressive pre-stress to 74MPa, it is 258 * 10 that magneto-strain increases
-6Strain value of reaching capacity under 30kA/m magnetic field.
Embodiment 2: preparation low field large magnetostrain strain Fe
0.81Ga
0.19Magnetostrictive material
With electronic balance weighing Fe 20.8127 grams, Ga 6.0950 grams, and put it in the interior water cooled copper mould of vacuum arc furnace ignition, regulate the vacuum degree 2 * 10 in the vacuum arc furnace ignition
-3Pa feeds high-purity argon gas and makes protection gas, treat that alloying element melts fully after, current interruption forms alloy pig, and alloy pig is overturn, and carries out melting again, melt back makes for 4 times the composition in the alloy even; Then ingot casting is melted once more the back suction and cast diameter 6.8mm * 80mm cylinder bar; The cylinder bar that makes is put into the Al of directional solidification high-temperature gradient vaccum sensitive stove
2O
3In the crucible, as cooling fluid, regulate the vacuum degree 4 * 10 in the vacuum chamber with the gallium indium alloy
-3Pa; feed high-purity argon gas and make protection gas; by regulating vaccum sensitive stove temperature gradient～500 ℃/cm, carrying out oriented growth with the setting rate of 10mm/h, realize high-temperature gradient directional solidification, obtain low field large magnetostrain strain Fe along the axial height of bar＜100〉preferred orientation
0.89Ga
0.19Magnetostrictive material.Adopt the line patterning method to cut out one section long sample of 25mm, sample is carried out Mechanics Performance Testing, its test result is yield strength 420MPa, compressive strength 900MPa.Employing standard four contact resistance strain gauge methods carry out the magneto-strain test under 0Mpa, 46Mpa, 74MPa.Measured result as shown in Figure 5.Maximum mangneto strain value is 128 * 10 under no pressure condition
-6, increasing during 46MPa is 288 * 10
-6, when continuing to increase compressive pre-stress to 74MPa, it is 294 * 10 that magneto-strain increases
-6Strain value of reaching capacity under 25kA/m magnetic field.
Embodiment 3: preparation low field large magnetostrain strain Fe
0.73Ga
0.27Magnetostrictive material
With electronic balance weighing Fe 20.8200 grams, Ga 9.6138 grams, and put it in the interior water cooled copper mould of vacuum arc furnace ignition, regulate the vacuum degree 2 * 10 in the vacuum arc furnace ignition
-3Pa feeds high-purity argon gas and makes protection gas, treat that alloying element melts fully after, current interruption forms alloy pig, and alloy pig is overturn, and carries out melting again, melt back makes for 4 times the composition in the alloy even; Then ingot casting is melted once more the back suction and cast diameter 6.8mm * 80mm cylinder bar; The cylinder bar that makes is put into the Al of directional solidification high-temperature gradient vaccum sensitive stove
2O
3In the crucible, as cooling fluid, regulate the vacuum degree 4 * 10 in the vacuum chamber with the gallium indium alloy
-3Pa; feed high-purity argon gas and make protection gas; by regulating vaccum sensitive stove temperature gradient～500 ℃/cm, carrying out oriented growth with the setting rate of 20mm/h, realize high-temperature gradient directional solidification, obtain low field large magnetostrain strain Fe along the axial height of bar＜100〉preferred orientation
0.89Ga
0.19Magnetostrictive material.Adopt the line patterning method to cut out one section long sample of 25mm, sample is carried out Mechanics Performance Testing, its test result is yield strength 450MPa, compressive strength 910MPa.Employing standard four contact resistance strain gauge methods carry out the magneto-strain test under 0Mpa, 46Mpa, 74MPa.Measured result as shown in Figure 6.Maximum mangneto strain value is 168 * 10 under no pressure condition
-6, increasing during 46MPa is 252 * 10
-6, when continuing to increase compressive pre-stress to 74MPa, it is 271 * 10 that magneto-strain increases
-6Strain value of reaching capacity under 35kA/m magnetic field.
Claims (9)
1, a kind of Fe-Ga magnetiostriction material of low field large magnetostrain is characterized in that: this Fe-Ga magnetostrictive material chemical formula is: Fe
1-xGa
x, X=0.15～0.30 wherein.
2, Fe-Ga magnetiostriction material of low field large magnetostrain according to claim 1 is characterized in that: this Fe-Ga magnetostrictive material chemical formula is: Fe
1-xGa
x, X=0.17～0.21 wherein.
3, Fe-Ga magnetiostriction material of low field large magnetostrain according to claim 1 and 2 is characterized in that: Fe-Ga magnetostrictive material composition is Fe
0.82Ga
0.18
4, Fe-Ga magnetiostriction material of low field large magnetostrain according to claim 1 and 2 is characterized in that: Fe-Ga magnetostrictive material composition is Fe
0.81Ga
0.19
5, Fe-Ga magnetiostriction material of low field large magnetostrain according to claim 1 and 2 is characterized in that: Fe-Ga magnetostrictive material composition is Fe
0.73Ga
0.27
6, Fe-Ga magnetiostriction material of low field large magnetostrain according to claim 1 and 2 is characterized in that: its downfield environment is 20kA/m～40kA/m, and magneto-strain is 87 * 10
-6～294 * 10
-6, yield strength 400MPa～500MPa, room temperature compressive strength 900Mpa～1000MPa, amount of plastic deformation is less than 30%.
7, a kind of method for preparing Fe-Ga magnetiostriction material of low field large magnetostrain is characterized in that comprising the following steps:
The first step: the cast alloy charge bar, will put into the water cooled copper mould of vacuum arc furnace ignition after Fe, the weighing of Ga raw material earlier, regulate the vacuum degree 2 * 10 of vacuum chamber
-3Pa～4 * 10
-3Pa feeds inert gas and makes protection gas, treat that alloying element melts fully after, current interruption forms alloy pig, and alloy pig is overturn, and carries out melting again, melt back makes for 3～5 times the composition in the alloy even, the ingot casting fusing is inhaled cast bar then, and is stand-by;
Second step: will the above-mentioned Fe-Ga bar that makes put into the alundum tube of directional solidification high-temperature gradient vaccum sensitive stove, the interior vacuum degree 4 * 10 of adjusting vacuum chamber
-3Pa; feed inert gas and make protection gas; regulate directional solidification high-temperature gradient vaccum sensitive stove heating current; 400～700 ℃/cm of control temperature gradient, rate of crystalline growth 10～720mm/h; realize high-temperature gradient directional solidification, obtain along bar axial＜100〉preferred orientation Fe-Ga magnetiostriction material of low field large magnetostrain.
8, the method for preparing Fe-Ga magnetiostriction material of low field large magnetostrain according to claim 7 is characterized in that: adopt magnetic suspension zone-melting process directional solidification to prepare Fe-Ga magnetiostriction material of low field large magnetostrain in the second step course of processing.
9, the method for preparing Fe-Ga magnetiostriction material of low field large magnetostrain according to claim 7, it is characterized in that: protective gas is a high-purity argon gas.
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| WO2010020144A1 (en) * | 2008-08-19 | 2010-02-25 | 北京麦格东方材料技术有限公司 | Magnetostrictive material and preparation method thereof |
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| JP4053328B2 (en) * | 2002-03-27 | 2008-02-27 | 泰文 古屋 | Polycrystalline FeGa alloy ribbon with giant magnetostrictive properties |
| CN100352075C (en) * | 2002-05-17 | 2007-11-28 | 北京科技大学 | Fe-Ga series magnetostriction material and its producing process |
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2005
- 2005-03-14 CN CNB200510053908XA patent/CN100377379C/en not_active Expired - Fee Related
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| CN109868508A (en) * | 2018-12-28 | 2019-06-11 | 北京航空航天大学 | A method of control solid liquid interface growing large-size FeGa magnetostriction monocrystalline |
| CN109868508B (en) * | 2018-12-28 | 2019-09-20 | 北京航空航天大学 | A method of control solid liquid interface growing large-size FeGa magnetostriction monocrystalline |
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