JP2014007278A - 磁石の製造方法および磁石 - Google Patents
磁石の製造方法および磁石 Download PDFInfo
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- JP2014007278A JP2014007278A JP2012141803A JP2012141803A JP2014007278A JP 2014007278 A JP2014007278 A JP 2014007278A JP 2012141803 A JP2012141803 A JP 2012141803A JP 2012141803 A JP2012141803 A JP 2012141803A JP 2014007278 A JP2014007278 A JP 2014007278A
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- raw material
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- 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
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
-
- 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
- H01F1/059—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and Va elements, e.g. Sm2Fe17N2
- H01F1/0596—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and Va elements, e.g. Sm2Fe17N2 of rhombic or rhombohedral Th2Zn17 structure or hexagonal Th2Ni17 structure
-
- 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
- C22C1/02—Making non-ferrous alloys by melting
-
- 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
-
- 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
- H01F1/012—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials adapted for magnetic entropy change by magnetocaloric effect, e.g. used as magnetic refrigerating material
- H01F1/017—Compounds
-
- 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
- H01F1/06—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 in the form of particles, e.g. powder
- H01F1/065—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 in the form of particles, e.g. powder obtained by a reduction
-
- 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
- H01F1/06—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 in the form of particles, e.g. powder
- H01F1/08—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 in the form of particles, e.g. powder pressed, sintered, or bound together
-
- 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
- H01F41/026—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
Abstract
【解決手段】希土類元素をRとして含有するR-Fe-N系化合物の素材粉末10,30またはFe-N系化合物の素材粉末10,30を用い、素材粉末10,30の表面に生成した酸化膜32によって素材粉末10,30同士を接合させることにより成形体200を形成する酸化膜接合工程と、成形体200の表面をコーティング膜40により囲うコーティング工程とを備える。
【選択図】図5
Description
(請求項4)特に、前記コーティング工程は、無電解めっきによるコーティング膜を形成するとよい。
(請求項5)また、前記酸化焼成工程は、前記R-Fe-N系化合物または前記Fe-N系化合物の分解温度未満にて前記成形体を加熱するとよい。
(請求項6)また、前記希土類元素Rは、Smとするとよい。
(請求項4)無電解めっきを適用してコーティング膜を形成することにより、確実に高い抗折強度を得ることができる。ところで、電気めっきを適用する場合には、めっき前の成形体の接合強度を高くする必要がある。しかし、コーティング膜の形成として無電解めっきを適用することで、成形体がそれほど高い接合力を有する必要はなく、酸化膜による接合力で十分である。従って、確実に成形体の表面に無電解めっきによるコーティング膜を形成できる。さらに、コーティング工程においては、酸化膜によって成形体の内部にコーティング剤(無電解めっき液)が進入しにくい。つまり、めっき液が内部に進入することによる腐食などの発生を抑制できる。
(請求項6)希土類元素RとしてSmを適用することで、ジスプロシウムを用いないため、安価な磁石を製造できる。
(請求項7)上述した磁石の製造方法と同様に、安価でかつ高性能な磁石を製造できる。
上記実施形態においては、素材粉末10として、その表面全てに酸化膜が形成されていないものを用い、酸化焼成工程において酸化膜32を形成した。この他に、予め素材粉末10の表面に酸化膜を形成したものを用いることもできる。この場合、酸化膜を有する素材粉末により一次成形体を形成し、分解温度より低い温度で加熱することにより酸化膜同士が接合する。その後にコーティング工程を施し、コーティング膜によって成形体の表面を被覆する。
Claims (7)
- 希土類元素をRとして含有するR-Fe-N系化合物の素材粉末またはFe-N系化合物の素材粉末を用い、前記素材粉末の表面に生成した酸化膜によって前記素材粉末同士を接合させることにより成形体を形成する酸化膜接合工程と、
前記成形体の表面をコーティング膜により囲うコーティング工程と、
を備える磁石の製造方法。 - 前記磁石の製造方法は、前記素材粉末を所定形状に圧縮成形して一次成形体を形成する成形工程を備え、
前記酸化膜接合工程は、成形された前記素材粉末の一次成形体を酸化性雰囲気にて加熱して、前記素材粉末に生成される酸化膜により前記素材粉末同士を接合する酸化焼成工程である、請求項1の磁石の製造方法。 - 前記コーティング工程は、めっきによるコーティング膜を形成する、請求項1または2の磁石の製造方法。
- 前記コーティング工程は、無電解めっきによるコーティング膜を形成する、請求項3の磁石の製造方法。
- 前記酸化焼成工程は、前記R-Fe-N系化合物または前記Fe-N系化合物の分解温度未満にて前記成形体を加熱する、請求項2の磁石の製造方法。
- 前記希土類元素Rは、Smである、請求項1〜5の何れか一項の磁石の製造方法。
- 希土類元素をRとして含有するR-Fe-N系化合物の素材粉末またはFe-N系化合物の素材粉末を用い、前記素材粉末の表面に生成した酸化膜によって前記素材粉末同士を接合させることにより成形体を形成し、
前記成形体の表面をコーティング膜により囲われた磁石。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012141803A JP2014007278A (ja) | 2012-06-25 | 2012-06-25 | 磁石の製造方法および磁石 |
US13/923,842 US20130342298A1 (en) | 2012-06-25 | 2013-06-21 | Method of manufacturing magnet and magnet |
CN201310250400.3A CN103515084A (zh) | 2012-06-25 | 2013-06-21 | 磁铁的制造方法和磁铁 |
EP13173244.8A EP2680280A1 (en) | 2012-06-25 | 2013-06-21 | Method of manufacturing magnet and magnet |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012141803A JP2014007278A (ja) | 2012-06-25 | 2012-06-25 | 磁石の製造方法および磁石 |
Publications (1)
Publication Number | Publication Date |
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JP2014007278A true JP2014007278A (ja) | 2014-01-16 |
Family
ID=48651932
Family Applications (1)
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JP2012141803A Pending JP2014007278A (ja) | 2012-06-25 | 2012-06-25 | 磁石の製造方法および磁石 |
Country Status (4)
Country | Link |
---|---|
US (1) | US20130342298A1 (ja) |
EP (1) | EP2680280A1 (ja) |
JP (1) | JP2014007278A (ja) |
CN (1) | CN103515084A (ja) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6003085B2 (ja) | 2012-02-27 | 2016-10-05 | 株式会社ジェイテクト | 磁石の製造方法 |
JP2013175650A (ja) * | 2012-02-27 | 2013-09-05 | Jtekt Corp | 磁石の製造方法および磁石 |
US20140374643A1 (en) * | 2013-06-25 | 2014-12-25 | Jtekt Corporation | Magnet manufacturing method and magnet |
KR20180054266A (ko) * | 2016-11-15 | 2018-05-24 | 삼성전기주식회사 | 칩 전자부품 |
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EP0369097A1 (en) * | 1988-11-14 | 1990-05-23 | Asahi Kasei Kogyo Kabushiki Kaisha | Magnetic materials containing rare earth element iron nitrogen and hydrogen |
JPH05214463A (ja) * | 1991-10-24 | 1993-08-24 | Vacuumschmelze Gmbh | 窒素を含む永久磁石合金の成形体の製造方法 |
JP2705985B2 (ja) * | 1988-11-14 | 1998-01-28 | 旭化成工業株式会社 | 磁性材料、それから成る磁石及びそれらの製造方法 |
JP2004319602A (ja) * | 2003-04-11 | 2004-11-11 | Daido Steel Co Ltd | 等方性磁石の製造方法 |
JP2005223263A (ja) * | 2004-02-09 | 2005-08-18 | Sumitomo Metal Mining Co Ltd | 希土類永久磁石の製造方法及び得られた希土類永久磁石 |
JP2007129105A (ja) * | 2005-11-04 | 2007-05-24 | Neomax Co Ltd | 希土類合金系バインダレス磁石およびその製造方法 |
JP2011091313A (ja) * | 2009-10-26 | 2011-05-06 | Tdk Corp | 希土類磁石 |
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JPS6054406A (ja) | 1983-09-03 | 1985-03-28 | Sumitomo Special Metals Co Ltd | 耐酸化性のすぐれた永久磁石 |
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JPH0831363B2 (ja) | 1987-04-13 | 1996-03-27 | 住友特殊金属株式会社 | 耐食性永久磁石の製造方法 |
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WO2009057742A1 (ja) * | 2007-11-02 | 2009-05-07 | Asahi Kasei Kabushiki Kaisha | 磁石用複合磁性材料、及びその製造方法 |
JP4650593B2 (ja) * | 2008-12-15 | 2011-03-16 | 住友金属鉱山株式会社 | 希土類元素を含む鉄系磁石合金粉、およびその製造方法、得られるボンド磁石用樹脂組成物、ボンド磁石、並びに圧密磁石 |
JP5494056B2 (ja) * | 2010-03-16 | 2014-05-14 | Tdk株式会社 | 希土類焼結磁石、回転機及び往復動モータ |
-
2012
- 2012-06-25 JP JP2012141803A patent/JP2014007278A/ja active Pending
-
2013
- 2013-06-21 US US13/923,842 patent/US20130342298A1/en not_active Abandoned
- 2013-06-21 CN CN201310250400.3A patent/CN103515084A/zh active Pending
- 2013-06-21 EP EP13173244.8A patent/EP2680280A1/en not_active Withdrawn
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EP0369097A1 (en) * | 1988-11-14 | 1990-05-23 | Asahi Kasei Kogyo Kabushiki Kaisha | Magnetic materials containing rare earth element iron nitrogen and hydrogen |
JP2705985B2 (ja) * | 1988-11-14 | 1998-01-28 | 旭化成工業株式会社 | 磁性材料、それから成る磁石及びそれらの製造方法 |
JPH05214463A (ja) * | 1991-10-24 | 1993-08-24 | Vacuumschmelze Gmbh | 窒素を含む永久磁石合金の成形体の製造方法 |
JP2004319602A (ja) * | 2003-04-11 | 2004-11-11 | Daido Steel Co Ltd | 等方性磁石の製造方法 |
JP2005223263A (ja) * | 2004-02-09 | 2005-08-18 | Sumitomo Metal Mining Co Ltd | 希土類永久磁石の製造方法及び得られた希土類永久磁石 |
JP2007129105A (ja) * | 2005-11-04 | 2007-05-24 | Neomax Co Ltd | 希土類合金系バインダレス磁石およびその製造方法 |
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Publication number | Publication date |
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US20130342298A1 (en) | 2013-12-26 |
CN103515084A (zh) | 2014-01-15 |
EP2680280A1 (en) | 2014-01-01 |
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