CN109599238A - 一种钐钴永磁材料的制备方法 - Google Patents

一种钐钴永磁材料的制备方法 Download PDF

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CN109599238A
CN109599238A CN201811541731.1A CN201811541731A CN109599238A CN 109599238 A CN109599238 A CN 109599238A CN 201811541731 A CN201811541731 A CN 201811541731A CN 109599238 A CN109599238 A CN 109599238A
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王群华
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047Alloys characterised by their composition
    • H01F1/053Alloys characterised by their composition containing rare earth metals
    • H01F1/055Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/058Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IVa elements, e.g. Gd2Fe14C
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/032Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
    • H01F1/04Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
    • H01F1/047Alloys characterised by their composition
    • H01F1/053Alloys characterised by their composition containing rare earth metals
    • H01F1/055Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
    • H01F1/0555Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together
    • H01F1/0557Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 pressed, sintered or bonded together sintered
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/0253Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
    • H01F41/0273Imparting anisotropy

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Hard Magnetic Materials (AREA)
  • Physical Vapour Deposition (AREA)

Abstract

本发明公开了一种钐钴永磁材料的制备方法,采用掺杂来调整SmCo5合金的成分来获得大的合金成分过冷度,并配合高速快淬工艺,获得细小晶粒尺寸的各向异性SmCo5;本发明还采用采用纳米团簇沉积技术在磁材表面沉积抗氧化覆盖层,制得的磁材抗氧化性好。

Description

一种钐钴永磁材料的制备方法
所属技术领域
本发明涉及磁性材料制造领域,具体涉及一种钐钴永磁材料的制备方法。
背景技术
稀土永磁材料是指稀土金属和过渡族金属形成的合金经一定的工艺制成的永磁材料。稀土永磁材料是现在已知的综合性能最高的一种永磁材料,它比九十世纪使用的磁钢的磁性能高100多倍,比铁氧体、铝镍钴性能优越得多,比昂贵的铂钴合金的磁性能还高一倍。由于稀土永磁材料的使用,不仅促进了永磁器件向小型化发展,提高了产品的性能,而且促使某些特殊器件的产生,所以稀土永磁材料一出现,立即引起极大重视,发展极为迅速。稀土永磁材料已在机械、电子、仪表和医疗等领域获得了广泛应用。
SmCo5稀土永磁材料具有高的磁性能和高居里温度,尤其是工作温度在180-250℃以上时,该磁钢仍然具有高的磁能积、矫顽力和剩磁,因此被广泛应用于航空航天、国防军工、微波器件、通讯、医疗设备、仪器仪表、风力发电、各种磁性传动装置、传感器、磁处理器、高端电机等行业。
SmCo5稀土永磁材料的传统制备方法为粉末冶金法,工艺过程包括合金熔炼、制粉、磁场压制成型、烧结和热处理等。通过磁场取向成型,制备的合金具有强的磁各向异性和磁性能。但是该制备工艺过程较为复杂。
发明内容
本发明提供一种钐钴永磁材料的制备方法,采用掺杂来调整SmCo5合金的成分来获得大的合金成分过冷度,并配合高速快淬工艺,获得细小晶粒尺寸的各向异性SmCo5;本发明还采用采用纳米团簇沉积技术在磁材表面沉积抗氧化覆盖层,制得的磁材抗氧化性好。
为了实现上述目的,实现上述目的,本发明提供了一种钐钴永磁材料的制备方法,该钐钴永磁材料主体由下述组分按通式:Sm(Co1-yTiy)5-xSix,其中y=0.03-0.1,x=0.2-0.5;
该方法包括如下步骤:
(1)按照上述通式称取各元素进行配料;
(2)将配料置于熔炼炉中,炉内抽真空至少达到5×10-3Pa;然后,通氦气至炉内压力为50-80kPa;升温至1300-1450℃熔化,搅拌、精炼后浇铸到水冷铜模中待用;
(3)将得到的合金铸锭破碎,装入真空甩带机中的石英管内,石英管底端喷嘴直径为0.5-0.8mm,对真空甩带机的腔体抽真空后,向腔体内充入保护气体;接通真空甩带机电源,加热熔化石英管内的合金,同时,控制石英管底端喷嘴至铜辊表面距离为1-5mm,调整真空甩带机铜辊转速,使铜辊转速为55-65m/s,将母合金熔体喷射到转动的铜辊上,得到各向异性SmCo5型稀土永磁材料薄带;将薄带重新熔融后采用铜模铸造制得永磁材料主体;
(4)在永磁材料主体表面利用磁控溅射或者弧光放电等沉积技术沉积一层C覆盖层以防止永磁材料氧化。
本发明制备的铁基软磁复合磁芯具备以下优点:
(1)采用掺杂来调整SmCo5合金的成分来获得大的合金成分过冷度,并配合高速快淬工艺,获得细小晶粒尺寸的各向异性SmCo5
(2)本发明还采用采用纳米团簇沉积技术在磁材表面沉积抗氧化覆盖层,制得的磁材抗氧化性好。
具体实施方式
实施例一
本实施例的钐钴永磁材料主体由下述组分按通式:Sm(Co0.97Ti0.03)4.8Si0.2
按照上述通式称取各元素进行配料;将配料置于熔炼炉中,炉内抽真空至少达到5×10-3Pa;然后,通氦气至炉内压力为50kPa;升温至1300℃熔化,搅拌、精炼后浇铸到水冷铜模中待用。
将得到的合金铸锭破碎,装入真空甩带机中的石英管内,石英管底端喷嘴直径为0.5mm,对真空甩带机的腔体抽真空后,向腔体内充入保护气体;接通真空甩带机电源,加热熔化石英管内的合金,同时,控制石英管底端喷嘴至铜辊表面距离为1-5mm,调整真空甩带机铜辊转速,使铜辊转速为55-65m/s,将母合金熔体喷射到转动的铜辊上,得到各向异性SmCo5型稀土永磁材料薄带;将薄带重新熔融后采用铜模铸造制得永磁材料主体;在永磁材料主体表面利用磁控溅射或者弧光放电等沉积技术沉积一层C覆盖层以防止永磁材料氧化。
实施例二
本实施例的钐钴永磁材料主体由下述组分按通式:Sm(Co0.9Ti0.1)4.5Si0.5
按照上述通式称取各元素进行配料;将配料置于熔炼炉中,炉内抽真空至少达到5×10-3Pa;然后,通氦气至炉内压力为80kPa;升温至1450℃熔化,搅拌、精炼后浇铸到水冷铜模中待用。
将得到的合金铸锭破碎,装入真空甩带机中的石英管内,石英管底端喷嘴直径为0.8mm,对真空甩带机的腔体抽真空后,向腔体内充入保护气体;接通真空甩带机电源,加热熔化石英管内的合金,同时,控制石英管底端喷嘴至铜辊表面距离为5mm,调整真空甩带机铜辊转速,使铜辊转速为65m/s,将母合金熔体喷射到转动的铜辊上,得到各向异性SmCo5型稀土永磁材料薄带;将薄带重新熔融后采用铜模铸造制得永磁材料主体;在永磁材料主体表面利用磁控溅射或者弧光放电等沉积技术沉积一层C覆盖层以防止永磁材料氧化。
比较例
将钐钴熔配为合金,将熔配好的合金放入真空室的底部有孔的石英试管中,循环三次抽真空和反充入高纯Ar气;采用高频电磁方法加热熔配合金,再将Ar气充入石英试管将熔融态样品吹至旋转的转轮上成合金薄带;将所得合金薄带在Ar气保护下在400℃条件下保温1小时,然后随炉冷却至室温下出炉。重熔铸成永磁材料。
对相同形状和尺寸的实施例1-2及比较例的永磁材料进行磁性能测试,在25℃进行测试,(1)材料的矫顽力采用KM-Ot ype List-Koerzimeter矫顽力仪测量;(2)剩余磁化强度采用静态磁性能测量仪,以磁场为800A/m下的磁感应强度作为合金的饱和磁感应强度Bs。测试结果显示:实施例1-2的矫顽力相对比较例上升12%以上,剩余磁化强度相对比较例提高15%以上。

Claims (1)

1.一种钐钴永磁材料的制备方法,该钐钴永磁材料主体由下述组分按通式:Sm(Co1- yTiy)5-xSix,其中y=0.03-0.1,x=0.2-0.5;
该方法包括如下步骤:
(1)按照上述通式称取各元素进行配料;
(2)将配料置于熔炼炉中,炉内抽真空至少达到5×10-3Pa;然后,通氦气至炉内压力为50-80kPa;升温至1300-1450℃熔化,搅拌、精炼后浇铸到水冷铜模中待用;
(3)将得到的合金铸锭破碎,装入真空甩带机中的石英管内,石英管底端喷嘴直径为0.5-0.8mm,对真空甩带机的腔体抽真空后,向腔体内充入保护气体;接通真空甩带机电源,加热熔化石英管内的合金,同时,控制石英管底端喷嘴至铜辊表面距离为1-5mm,调整真空甩带机铜辊转速,使铜辊转速为55-65m/s,将母合金熔体喷射到转动的铜辊上,得到各向异性SmCo5型稀土永磁材料薄带;将薄带重新熔融后采用铜模铸造制得永磁材料主体;
(4)在永磁材料主体表面利用磁控溅射或者弧光放电等沉积技术沉积一层C覆盖层以防止永磁材料氧化。
CN201811541731.1A 2018-12-17 2018-12-17 一种钐钴永磁材料的制备方法 Pending CN109599238A (zh)

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Cited By (1)

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CN114855056A (zh) * 2022-04-11 2022-08-05 杭州永磁集团有限公司 一种掺杂有铸造铝镍钴的异质结烧结铝镍钴的制备方法

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Application publication date: 20190409