JP4470884B2 - R−t−b系焼結磁石およびその製造方法 - Google Patents
R−t−b系焼結磁石およびその製造方法 Download PDFInfo
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- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 36
- 239000000956 alloy Substances 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 35
- 238000010438 heat treatment Methods 0.000 claims description 20
- 239000000203 mixture Substances 0.000 claims description 18
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 17
- 239000000843 powder Substances 0.000 claims description 17
- 229910052779 Neodymium Inorganic materials 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 13
- 239000002184 metal Substances 0.000 claims description 13
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 11
- 239000001257 hydrogen Substances 0.000 claims description 11
- 229910052739 hydrogen Inorganic materials 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 10
- 239000001301 oxygen Substances 0.000 claims description 10
- 229910052760 oxygen Inorganic materials 0.000 claims description 10
- 238000005245 sintering Methods 0.000 claims description 10
- 229910052692 Dysprosium Inorganic materials 0.000 claims description 9
- 229910052771 Terbium Inorganic materials 0.000 claims description 8
- 229910052757 nitrogen Inorganic materials 0.000 claims description 8
- 229910052782 aluminium Inorganic materials 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 239000013078 crystal Substances 0.000 claims description 4
- 229910052738 indium Inorganic materials 0.000 claims description 4
- 229910052748 manganese Inorganic materials 0.000 claims description 4
- 229910052750 molybdenum Inorganic materials 0.000 claims description 4
- 229910052758 niobium Inorganic materials 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 229910052715 tantalum Inorganic materials 0.000 claims description 4
- 229910052721 tungsten Inorganic materials 0.000 claims description 4
- 229910052720 vanadium Inorganic materials 0.000 claims description 4
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 claims description 3
- 229910052735 hafnium Inorganic materials 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 3
- 229910052718 tin Inorganic materials 0.000 claims description 3
- 229910052719 titanium Inorganic materials 0.000 claims description 3
- 229910052725 zinc Inorganic materials 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims 1
- 238000010791 quenching Methods 0.000 claims 1
- 230000000171 quenching effect Effects 0.000 claims 1
- 230000005291 magnetic effect Effects 0.000 description 36
- 230000004907 flux Effects 0.000 description 14
- 230000000694 effects Effects 0.000 description 13
- 230000007423 decrease Effects 0.000 description 11
- 238000010298 pulverizing process Methods 0.000 description 11
- 229910052761 rare earth metal Inorganic materials 0.000 description 11
- 238000000465 moulding Methods 0.000 description 10
- 238000005266 casting Methods 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 229910052733 gallium Inorganic materials 0.000 description 6
- 230000009467 reduction Effects 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 5
- 238000010894 electron beam technology Methods 0.000 description 5
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- 239000002994 raw material Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000000654 additive Substances 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
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- 230000008901 benefit Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 150000002910 rare earth metals Chemical class 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 229940125368 controlled substance Drugs 0.000 description 2
- 239000000599 controlled substance Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000005347 demagnetization Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000700 radioactive tracer Substances 0.000 description 2
- 238000005464 sample preparation method Methods 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 238000007088 Archimedes method Methods 0.000 description 1
- 229910052684 Cerium Inorganic materials 0.000 description 1
- 229910000722 Didymium Inorganic materials 0.000 description 1
- 241000224487 Didymium Species 0.000 description 1
- 229910001122 Mischmetal Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910052789 astatine Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- -1 fatty acid esters Chemical class 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 238000005984 hydrogenation reaction Methods 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 238000010587 phase diagram Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/0433—Nickel- or cobalt-based alloys
- C22C1/0441—Alloys based on intermetallic compounds of the type rare earth - Co, Ni
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0257—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements
- C22C33/0278—Making ferrous alloys by powder metallurgy characterised by the range of the alloying elements with at least one alloying element having a minimum content above 5%
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/002—Ferrous alloys, e.g. steel alloys containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/08—Ferrous alloys, e.g. steel alloys containing nickel
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/16—Ferrous alloys, e.g. steel alloys containing copper
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—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
- H01F41/02—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
- 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
- H01F41/0266—Moulding; Pressing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/04—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling
- B22F2009/048—Making metallic powder or suspensions thereof using physical processes starting from solid material, e.g. by crushing, grinding or milling by pulverising a quenched ribbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D6/00—Heat treatment of ferrous alloys
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- Hard Magnetic Materials (AREA)
- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
- Powder Metallurgy (AREA)
Description
Rは希土類焼結磁石の必須元素であって、Nd、Pr、Dy、Tbのうち少なくとも1種から選択され得る。ただし、Rは、NdまたはPrのいずれか一方を必ず含むことが望ましい。更に好ましくは、Nd−Dy、Nd−Tb、Nd−Pr−Dy、またはNd−Pr−Tbで示される希土類元素の組合わせを用いる。
Nd31.0質量%、Co1.0質量%、Ga0.02質量%、B0.93〜1.02質量%、Al0.2質量%、Cu0.1質量%、残部Feからなる組成の各元素を溶解し、ストリップキャスト法により、凝固させた。こうして得られたB量が異なるそれぞれの合金に対して、水素加圧による水素脆化法にて脆化後、真空中600℃(873K)で1時間保持し、冷却して原料粗粉を得た。この原料粗粉を、気流式粉砕器(日本ニューマチック製PJM)を用いて、窒素ガス雰囲気で微粉砕した。何れの試料も、得られた微粉末の粒度はFSSSの測定で3.0±0.1μmであった。
図2は、R量を31質量%、B量を0.94質量%に固定し、Ga量を変化させた場合の磁石特性と密度を示すグラフである。B濃度(0.94質量%)は、図1のグラフからわかるように、Ga添加効果が顕著に認められる組成範囲内に設定している。
実施例1で用いた試料につき、熱消磁後の磁石を機械的に加工、研磨し、金属組織を観察した。図3は、31Nd−bal.Fe−1Co−0.2Al−0.1Cu−0.02Ga−0.93Bの焼結磁石の金属組織を示す。図3における左の写真は反射電子線像を示し、右の写真はBの特性X線像を示している。この組成では、Bの集積点が認められず、実質的にB−rich相がないことがわかる。
実施例1で用いた試料につき、熱消磁後の磁石を機械的に加工、研磨し、金属組織を観察した。図4は、31Nd−bal.Fe−1Co−0.2Al−0.1Cu−0.02Ga−1.01Bの焼結磁石の金属組織を示す。図4における左の写真は、反射電子線像を示し、右の写真は、Bの特性X線像を示している。図4からわかるように、Bの集積点が観察される。すなわち、Bが過剰の組成では、Gaを添加しても、B−rich相が生成される。
本実施例は、実施例1と同様にして作製した試料において、希土類元素Rの一部を重希土類Dyで置換している。磁気特性のDy置換率依存性を図6に示す。図6から、B濃度が0.93質量%という低い値でも、Gaの添加により、大きな保磁力が得られることがわかる。
焼結磁石の組成がNd31.0質量%、Co1.0質量%、Ga0.04質量%、Al0.2質量%、Cu0.1質量%、B0.93〜1.01質量%、残部Feとなるように、各元素の原料を溶解・鋳造した。本実施例では、上記の溶解・鋳造をストリップキャスト法およびインゴット法の各々の方法によって行なった。こうして得られた合金に含まれるB量は試料ごとに0.93〜1.01質量%の範囲で異なる値を示す。
Claims (5)
- R:27.0質量%以上32.0質量%以下(Rは、Nd、Pr、Dy、Tbのうち少なくとも1種であり、NdまたはPrのいずれかが必ず含まれる)、
T:63.0質量%以上72.5質量%以下(Tは、Feを必ず含み、Tの50%以下をCoで置換できる)、
Ga:0.01質量%以上0.08質量%以下、および
B:0.90質量%以上0.96質量%以下
の組成を有し、
正方晶R2T14B型結晶構造を有する主相が磁石体積の90%以上を占め、かつR1.1Fe4B4相を実質的に含まない、R−T−B系焼結磁石。 - M:2.0質量%以下(Mは、Al、Si、Ti、V、Cr、Mn、Ni、Cu、Zn、Zr、Nb、Mo、In、Sn、Hf、Ta、Wからなる群から選択された少なくとも1種)を含有する請求項1に記載のR−T−B系焼結磁石。
- 酸素濃度は0.5質量%以下であり、窒素濃度は0.2質量%以下であり、水素濃度は0.01質量%以下である請求項1または2に記載のR−T−B系焼結磁石。
- R:27.0質量%以上32.0質量%以下(Rは、Nd、Pr、Dy、Tbのうち少なくとも1種であり、NdまたはPrのいずれかが必ず含まれる)、T:63.0質量%以上72.5質量%以下(Tは、Feを必ず含み、Tの50%以下をCoで置換できる)、Ga:0.01質量%以上0.08質量%以下、およびB:0.90質量%以上0.96質量%以下の組成を有する合金の粉末を用意する工程と、
前記合金の粉末を成形し、焼結して焼結磁石を作製する工程と、
前記焼結磁石に対して、400℃〜600℃の熱処理を施す工程と、
を含むR−T−B系焼結磁石の製造方法。 - 前記合金の粉末を用意する工程は、
前記合金の溶湯を用意する工程と、
前記合金の溶湯をストリップキャスト法によって急冷し、凝固させることによって急冷合金を作製する工程と、
前記急冷合金を粉砕する工程と、
を含む請求項4に記載のR−T−B系焼結磁石の製造方法。
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JP2003065900 | 2003-03-12 | ||
JP2003065900 | 2003-03-12 | ||
PCT/JP2004/003150 WO2004081954A1 (ja) | 2003-03-12 | 2004-03-10 | R-t-b系焼結磁石およびその製造方法 |
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JP4470884B2 true JP4470884B2 (ja) | 2010-06-02 |
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US (1) | US20050268989A1 (ja) |
EP (1) | EP1562203A4 (ja) |
JP (1) | JP4470884B2 (ja) |
CN (1) | CN100550219C (ja) |
WO (1) | WO2004081954A1 (ja) |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN100545959C (zh) * | 2003-08-12 | 2009-09-30 | 日立金属株式会社 | R-t-b系烧结磁铁及稀土类合金 |
JP4260087B2 (ja) * | 2004-09-27 | 2009-04-30 | 日立金属株式会社 | 希土類焼結磁石及びその製造方法 |
JP4706900B2 (ja) * | 2005-02-17 | 2011-06-22 | Tdk株式会社 | 希土類永久磁石の製造方法 |
JP4671024B2 (ja) * | 2005-03-18 | 2011-04-13 | Tdk株式会社 | 希土類焼結磁石の製造方法 |
US20070089806A1 (en) * | 2005-10-21 | 2007-04-26 | Rolf Blank | Powders for rare earth magnets, rare earth magnets and methods for manufacturing the same |
US20070137733A1 (en) * | 2005-12-21 | 2007-06-21 | Shengzhi Dong | Mixed rare-earth based high-coercivity permanent magnet |
JP5572673B2 (ja) * | 2011-07-08 | 2014-08-13 | 昭和電工株式会社 | R−t−b系希土類焼結磁石用合金、r−t−b系希土類焼結磁石用合金の製造方法、r−t−b系希土類焼結磁石用合金材料、r−t−b系希土類焼結磁石、r−t−b系希土類焼結磁石の製造方法およびモーター |
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JP5742813B2 (ja) | 2012-01-26 | 2015-07-01 | トヨタ自動車株式会社 | 希土類磁石の製造方法 |
US10497497B2 (en) | 2012-02-02 | 2019-12-03 | Santoku Corporation | R-T-B—Ga-based magnet material alloy and method of producing the same |
JP5758016B2 (ja) * | 2012-02-02 | 2015-08-05 | 中央電気工業株式会社 | R−T−B−Ga系磁石用原料合金およびその製造方法 |
JP6156375B2 (ja) | 2012-06-22 | 2017-07-05 | Tdk株式会社 | 焼結磁石 |
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JP2014086529A (ja) * | 2012-10-23 | 2014-05-12 | Toyota Motor Corp | 希土類焼結磁石とその製造方法 |
US10468165B2 (en) | 2013-06-05 | 2019-11-05 | Toyota Jidosha Kabushiki Kaisha | Rare-earth magnet and method for manufacturing same |
EP3011573B1 (en) | 2013-06-17 | 2020-06-10 | Urban Mining Technology Company, LLC | Magnet recycling to create nd-fe-b magnets with improved or restored magnetic performance |
CN104674115A (zh) * | 2013-11-27 | 2015-06-03 | 厦门钨业股份有限公司 | 一种低b的稀土磁铁 |
JP6003920B2 (ja) | 2014-02-12 | 2016-10-05 | トヨタ自動車株式会社 | 希土類磁石の製造方法 |
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US9336932B1 (en) | 2014-08-15 | 2016-05-10 | Urban Mining Company | Grain boundary engineering |
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CN105730876B (zh) * | 2016-04-20 | 2018-06-01 | 青岛海信电器股份有限公司 | 电视包装箱 |
CN108154987B (zh) | 2016-12-06 | 2020-09-01 | Tdk株式会社 | R-t-b系永久磁铁 |
US10672544B2 (en) | 2016-12-06 | 2020-06-02 | Tdk Corporation | R-T-B based permanent magnet |
US10892076B2 (en) | 2016-12-28 | 2021-01-12 | Toyota Jidosha Kabushiki Kaisha | Rare earth magnet and method of producing the same |
JP7110662B2 (ja) | 2018-03-28 | 2022-08-02 | Tdk株式会社 | R‐t‐b系焼結磁石 |
US11721479B2 (en) * | 2019-08-29 | 2023-08-08 | Toyota Jidosha Kabushiki Kaisha | Rare earth magnets |
CN114730652A (zh) | 2019-11-11 | 2022-07-08 | 信越化学工业株式会社 | R-Fe-B系烧结磁体 |
EP4060689A4 (en) | 2019-11-11 | 2023-12-06 | Shin-Etsu Chemical Co., Ltd. | SINTERED R-FE-B MAGNET |
WO2021107012A1 (ja) * | 2019-11-27 | 2021-06-03 | Tdk株式会社 | R-t-b系永久磁石 |
JP2024072521A (ja) * | 2022-11-16 | 2024-05-28 | 信越化学工業株式会社 | R-t-b系焼結磁石 |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR880000992A (ko) * | 1986-06-12 | 1988-03-30 | 와다리 스기이찌로오 | 영구자석 |
US5223047A (en) * | 1986-07-23 | 1993-06-29 | Hitachi Metals, Ltd. | Permanent magnet with good thermal stability |
JP2898463B2 (ja) * | 1992-03-19 | 1999-06-02 | 住友特殊金属株式会社 | R−Fe−B系永久磁石用原料粉末の製造方法 |
US5472525A (en) * | 1993-01-29 | 1995-12-05 | Hitachi Metals, Ltd. | Nd-Fe-B system permanent magnet |
US5858123A (en) * | 1995-07-12 | 1999-01-12 | Hitachi Metals, Ltd. | Rare earth permanent magnet and method for producing the same |
JPH10289813A (ja) * | 1997-04-16 | 1998-10-27 | Hitachi Metals Ltd | 希土類磁石 |
JP3846835B2 (ja) * | 1998-10-14 | 2006-11-15 | 株式会社Neomax | R−t−b系焼結型永久磁石 |
DE69911138T2 (de) * | 1998-10-14 | 2004-07-22 | Hitachi Metals, Ltd. | Gesinterter R-T-B-Dauermagnet |
JP2001297907A (ja) * | 2000-04-14 | 2001-10-26 | Hitachi Metals Ltd | R−t−b系焼結磁石、リング磁石およびボイスコイルモータ |
US6746545B2 (en) * | 2000-05-31 | 2004-06-08 | Shin-Etsu Chemical Co., Ltd. | Preparation of rare earth permanent magnets |
CN1182548C (zh) * | 2000-07-10 | 2004-12-29 | 株式会社新王磁材 | 稀土磁铁及其制造方法 |
JP2002038245A (ja) * | 2000-07-27 | 2002-02-06 | Hitachi Metals Ltd | 希土類永久磁石用合金粉末および希土類永久磁石の製造方法 |
JP4371188B2 (ja) * | 2000-08-22 | 2009-11-25 | 信越化学工業株式会社 | 高比電気抵抗性希土類磁石及びその製造方法 |
JP2002285276A (ja) * | 2001-03-26 | 2002-10-03 | Hitachi Metals Ltd | R−t−b−c系焼結磁石及びその製造方法 |
US7014718B2 (en) * | 2001-09-03 | 2006-03-21 | Showa Denko K.K. | Rare earth magnet alloy ingot, manufacturing method for the same, R-T-B type magnet alloy ingot, R-T-B type magnet, R-T-B type bonded magnet, R-T-B type exchange spring magnet alloy ingot, R-T-B type exchange spring magnet, and R-T-B type exchange spring bonded magnet |
JP3997413B2 (ja) * | 2002-11-14 | 2007-10-24 | 信越化学工業株式会社 | R−Fe−B系焼結磁石及びその製造方法 |
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2004
- 2004-03-10 US US10/527,797 patent/US20050268989A1/en not_active Abandoned
- 2004-03-10 JP JP2005503551A patent/JP4470884B2/ja not_active Expired - Lifetime
- 2004-03-10 EP EP04719123A patent/EP1562203A4/en not_active Withdrawn
- 2004-03-10 CN CNB2004800015514A patent/CN100550219C/zh not_active Expired - Lifetime
- 2004-03-10 WO PCT/JP2004/003150 patent/WO2004081954A1/ja active Application Filing
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EP1562203A4 (en) | 2009-08-05 |
US20050268989A1 (en) | 2005-12-08 |
CN100550219C (zh) | 2009-10-14 |
JPWO2004081954A1 (ja) | 2006-06-15 |
WO2004081954A1 (ja) | 2004-09-23 |
EP1562203A1 (en) | 2005-08-10 |
CN1717755A (zh) | 2006-01-04 |
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