JP6385551B1 - Nd−Fe−B系磁性体の保磁力増強方法 - Google Patents
Nd−Fe−B系磁性体の保磁力増強方法 Download PDFInfo
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- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 148
- 239000000696 magnetic material Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000002708 enhancing effect Effects 0.000 title claims abstract description 14
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims abstract description 50
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 claims abstract description 42
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052692 Dysprosium Inorganic materials 0.000 claims abstract description 30
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 26
- 150000002910 rare earth metals Chemical class 0.000 claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 21
- 229910052771 Terbium Inorganic materials 0.000 claims abstract description 20
- 229910052786 argon Inorganic materials 0.000 claims abstract description 17
- 239000007789 gas Substances 0.000 claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 8
- 229910001117 Tb alloy Inorganic materials 0.000 claims abstract description 7
- MOSURRVHVKOQHA-UHFFFAOYSA-N [Tb].[Dy] Chemical compound [Tb].[Dy] MOSURRVHVKOQHA-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000010409 thin film Substances 0.000 claims description 83
- 239000010408 film Substances 0.000 claims description 26
- 230000032683 aging Effects 0.000 claims description 23
- 238000009792 diffusion process Methods 0.000 claims description 23
- 239000002245 particle Substances 0.000 claims description 14
- 238000005245 sintering Methods 0.000 claims description 8
- 238000004372 laser cladding Methods 0.000 claims description 4
- 230000007480 spreading Effects 0.000 claims description 2
- 238000003892 spreading Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 10
- WSFQKYAVYHDRER-UHFFFAOYSA-N dysprosium Chemical compound [Dy].[Dy] WSFQKYAVYHDRER-UHFFFAOYSA-N 0.000 description 10
- 229910052736 halogen Inorganic materials 0.000 description 8
- 229910052721 tungsten Inorganic materials 0.000 description 8
- 239000010937 tungsten Substances 0.000 description 8
- -1 tungsten halogen Chemical class 0.000 description 8
- 238000004458 analytical method Methods 0.000 description 6
- 230000003247 decreasing effect Effects 0.000 description 6
- 238000005259 measurement Methods 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 229910052731 fluorine Inorganic materials 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- 230000002411 adverse Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910003440 dysprosium oxide Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005324 grain boundary diffusion Methods 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000007733 ion plating Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000013077 target material Substances 0.000 description 1
- 229910003451 terbium oxide Inorganic materials 0.000 description 1
- SCRZPWWVSXWCMC-UHFFFAOYSA-N terbium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Tb+3].[Tb+3] SCRZPWWVSXWCMC-UHFFFAOYSA-N 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
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- C—CHEMISTRY; METALLURGY
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- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
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- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
- H01F1/0571—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes
- H01F1/0575—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together
- H01F1/0577—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B in the form of particles, e.g. rapid quenched powders or ribbon flakes pressed, sintered or bonded together sintered
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- H01F41/0253—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets
- H01F41/026—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing permanent magnets protecting methods against environmental influences, e.g. oxygen, by surface treatment
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Abstract
Description
A)Nd−Fe−B系磁性体薄片をアルゴンガス保護容器内に置き、ジスプロシウム、テルビウム又はジスプロシウム−テルビウム合金の少なくとも一種の重希土類粉末を前記Nd−Fe−B系磁性体薄片の表面に均一に散布し、急速加熱法によって前記重希土類粉末を前記Nd−Fe−B系磁性体薄片の表面に迅速に成膜させ、かつ前記Nd−Fe−B系磁性体薄片の表面に凝着させ、
B)重希土類膜層で覆われた前記Nd−Fe−B系磁性体薄片を真空焼結炉に投入し、真空又はアルゴンガスでの保護条件下において前記Nd−Fe−B系磁性体薄片に対して高温拡散及び時効処理を行う、ことを特徴とする。
以下、本発明の実施例1について、その製造過程を詳細に説明する。
まず、縦×横×厚さが、20mm×20mm×2mmサイズからなるNd−Fe−B系磁性体薄をアルゴンガス保護容器内に置き、平均粒子径2μmのジスプロシウム粉末を、Nd−Fe−B系磁性体薄片の一方表面に均一に散布した。ジスプロシウム粉末の質量はNd−Fe−B系磁性体薄片の質量に対し0.3%である。なお、以下説明する磁石サイズの表記は、いずれも縦×横×厚みである。
以下、本発明の実施例2について、その製造過程を詳細に説明する。
まず、20*20*2TサイズからなるNd−Fe−B系磁性体薄片をアルゴンガス保護容器へ置き、平均粒子径300μmのテルビウム粉末を、Nd−Fe−B系磁性体薄片の一方表面に均一に散布した。テルビウム粉末の質量はNd−Fe−B系磁性体薄片の質量に対し0.3%である。
以下、本発明の実施例3について、その製造過程を詳細に説明する。
まず、20mm×20mm×10mmサイズからなるNd−Fe−B系磁性体薄片をアルゴンガス保護容器へ置き、平均粒子径200μmのジスプロシウム粉末を、Nd−Fe−B系磁性体薄片の一方表面に均一に散布した。ジスプロシウム粉末の質量はNd−Fe−B系磁性体薄片の質量に対して1.0%である。
以下、本発明の実施例4について、その製造過程を詳細に説明する。
まず、20mm×20mm×10mmサイズからなるNd−Fe−B系磁性体薄片をアルゴンガス保護容器へ置き、平均粒子径2μmのテルビウム粉末を、Nd−Fe−B系磁性体薄片の一方表面に均一に散布した。テルビウム粉末の質量はNd−Fe−B系磁性体薄片の質量に対して0.8%である。
以下、本発明の実施例5について、その製造過程を詳細に説明する。
まず、20mm×20mm×5mmサイズからなるNd−Fe−B系磁性体薄片をアルゴンガス保護容器に置き、平均粒子径0.5μmのジスプロシウム粉末及びテルビウム粉末を、Nd−Fe−B系磁性体薄片の一方表面に均一に散布した。ジスプロシウム粉末及びテルビウム粉末の質量比は3:7であり、かつNd−Fe−B系磁性体薄片の質量に対して合計で0.1%である。なお、ジスプロシウム及びテルビウムの単体粉末に代えて、ジスプロシウム−テルビウム合金粉末を用いても良い。
以下、本発明の実施例6について、その製造過程を詳細に説明する。
まず、20mm×20mm×5mmサイズのNd−Fe−B系磁性体薄片をアルゴンガス保護容器に置き、平均粒子径100μmのジスプロシウム及びテルビウム粉末を、Nd−Fe−B系磁性体薄片の一方表面に均一に散布し、ジスプロシウム及びテルビウム粉末の質量比は3:7であり、かつNd−Fe−B系磁性体薄片の質量に対し合計で0.2%であった。なお、ジスプロシウム及びテルビウムの単体粉末に代えて、ジスプロシウム−テルビウム合金粉末を用いても良い。
なお、本発明で言う磁石表面とは、四角柱からなる薄片磁石の上面と底面を構成する最大面(上記各実施例中の縦×横を構成する面)を意味する。
Claims (7)
- Nd−Fe−B系磁性体の保磁力増強方法であって、
A)Nd−Fe−B系磁性体薄片をアルゴンガス保護容器内に置き、ジスプロシウム、テルビウム又はジスプロシウム−テルビウム合金の少なくとも一種の重希土類粉末を前記Nd−Fe−B系磁性体薄片の少なくとも一方表面に均一に散布し、急速加熱法によって前記重希土類粉末を前記Nd−Fe−B系磁性体薄片の表面に迅速に成膜させて前記Nd−Fe−B系磁性体薄片の前記一方表面に凝着させ、
B)重希土類膜層で覆われた前記Nd−Fe−B系磁性体薄片を真空焼結炉に投入し、真空又はアルゴンガスでの保護条件下において前記Nd−Fe−B系磁性体薄片に対して高温拡散及び時効処理を行う、
ことを特徴とするNd−Fe−B系磁性体の保磁力増強方法。 - 前記Nd−Fe−B系磁性体薄片の厚みは0.5〜10mmの範囲である、
ことを特徴とする請求項1に記載のNd−Fe−B系磁性体の保磁力増強方法。 - 前記重希土類粉末の粒子径は0.5〜300μmである、
ことを特徴とする請求項1に記載のNd−Fe−B系磁性体の保磁力増強方法。 - 前記Nd−Fe−B系磁性体薄片の少なくとも一方表面を覆う前記重希土類粉末のNd−Fe−B系磁性体に対する質量比は0.1〜2質量%である、
ことを特徴とする請求項1に記載のNd−Fe−B系磁性体の保磁力増強方法。 - 前記急速加熱法はランプ照射加熱又はレーザクラッディングである、
ことを特徴とする請求項1に記載のNd−Fe−B系磁性体の保磁力増強方法。 - 前記Nd−Fe−B系磁性体薄片の一方表面に前記重希土類粉末を成膜した後、更に前記Nd−Fe−B系磁性体薄片を180度反転させ、前記Nd−Fe−B系磁性体薄片の他方表面にも前記重希土類粉末を散布して成膜する、
ことを特徴とする請求項1に記載のNd−Fe−B系磁性体の保磁力増強方法。 - 前記高温拡散の拡散温度は800〜1000℃、拡散時間は3〜72時間であり、
前記時効処理の温度は450〜700℃、時効時間は3〜15時間である、
ことを特徴とする請求項1に記載のNd−Fe−B系磁性体の保磁力増強方法。
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JP2019024073A (ja) | 2019-02-14 |
US11114237B2 (en) | 2021-09-07 |
CN107424825A (zh) | 2017-12-01 |
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