JP2015119132A - 希土類磁石 - Google Patents
希土類磁石 Download PDFInfo
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- JP2015119132A JP2015119132A JP2013263368A JP2013263368A JP2015119132A JP 2015119132 A JP2015119132 A JP 2015119132A JP 2013263368 A JP2013263368 A JP 2013263368A JP 2013263368 A JP2013263368 A JP 2013263368A JP 2015119132 A JP2015119132 A JP 2015119132A
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- grain boundary
- boundary phase
- rare earth
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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
-
- 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
Abstract
【解決手段】主相であるR2T14B結晶粒子1と、該R2T14B結晶粒子間の粒界相3とを含んだ焼結磁石であって、R:20〜40原子%、T:60〜75原子%、M:1〜10原子%、の範囲でR−T−M元素を少なくとも含有する第一粒界相と、R:50〜70原子%、T:10〜30原子%、M:1〜20原子%、の範囲でR−T−M元素を少なくとも含有する第二粒界相とを、少なくとも含むように焼結体の微細構造を制御する。
【選択図】図1
Description
R:20〜40原子%、
T:60〜75原子%、
M:1〜10原子%、
の範囲でR−T−M元素を少なくとも含有する粒界相を第一粒界相とし、
R:50〜70原子%、
T:10〜30原子%、
M:1〜20原子%、
の範囲でR−T−M元素を少なくとも含有する粒界相を第二粒界相とした場合、少なくともこれら2種の粒界相を含むことを特徴とする。このように構成することで、高温減磁率の絶対値を4%以下に抑制できる。
(MはAl、Ge、Si、Sn、Gaから選ばれる少なくとも一種)
R:20〜40原子%、
T:60〜75原子%、
M:1〜10原子%、
の範囲でR−T−M元素を少なくとも含有する粒界相を第一粒界相とし、
R:50〜70原子%、
T:10〜30原子%、
M:1〜20原子%、
の範囲でR−T−M元素を少なくとも含有する粒界相を第二粒界相とした場合、少なくともこれら2種の粒界相を含むことを特徴とする。
R:29.5〜33質量%
B:0.7〜0.95質量%
M:0.03〜1.5質量%
Cu:0.01〜1.5質量%、及び、
Fe:実質的に残部、及び、
残部を占める元素のうちのFe以外の元素の合計含有量:5質量%以下。
D=(B1−B0)/B0*100(%)
と、評価される。
]、[O]、[N]、[Nd]、[Pr]、[B]及び[M]としたとき、各試料の[O]/([C]+[N])、[B]/([Nd]+[Pr])及び([M]+[C])/[B]の値を算出し、表3に示した。
2 二粒子粒界相
3 粒界相
Claims (2)
- R2T14B主相結晶粒子と、粒界相とを含む希土類磁石において、
R:20〜40原子%、
T:60〜75原子%、
M:1〜10原子%、
の範囲でR−T−M元素を少なくとも含有する第一粒界相と、
R:50〜70原子%、
T:10〜30原子%、
M:1〜20原子%、
の範囲でR−T−M元素を少なくとも含有する第二粒界相とを、少なくとも含むことを特徴とする希土類磁石。
(但し、Rは希土類元素、TはFeを必須元素とした一種以上の鉄族元素、MはAl、Ge、Si、Sn、Gaから選ばれる少なくとも一種の元素をそれぞれ示す。) - 任意の断面において、前記第二粒界相の面積に対する前記第一粒界相の面積の比率が、0.5以上であること特徴とする、請求項1に記載の希土類磁石。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013263368A JP6142794B2 (ja) | 2013-12-20 | 2013-12-20 | 希土類磁石 |
DE102014118984.1A DE102014118984B4 (de) | 2013-12-20 | 2014-12-18 | Seltenerdbasierter Magnet |
CN201410799883.7A CN104733146B (zh) | 2013-12-20 | 2014-12-19 | 稀土类磁铁 |
US14/579,315 US10083783B2 (en) | 2013-12-20 | 2014-12-22 | Rare earth based magnet |
Applications Claiming Priority (1)
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JP2013263368A JP6142794B2 (ja) | 2013-12-20 | 2013-12-20 | 希土類磁石 |
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JP2015119132A true JP2015119132A (ja) | 2015-06-25 |
JP6142794B2 JP6142794B2 (ja) | 2017-06-07 |
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US (1) | US10083783B2 (ja) |
JP (1) | JP6142794B2 (ja) |
CN (1) | CN104733146B (ja) |
DE (1) | DE102014118984B4 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017045828A (ja) * | 2015-08-26 | 2017-03-02 | 日立金属株式会社 | R−t−b系焼結磁石 |
JP2017183710A (ja) * | 2016-03-28 | 2017-10-05 | Tdk株式会社 | R−t−b系永久磁石 |
JP2018125445A (ja) * | 2017-02-02 | 2018-08-09 | 日立金属株式会社 | R−t−b系焼結磁石 |
JP2018153008A (ja) * | 2017-03-13 | 2018-09-27 | Tdk株式会社 | モータ |
JP2020155476A (ja) * | 2019-03-18 | 2020-09-24 | Tdk株式会社 | R‐t‐b系永久磁石 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6142792B2 (ja) * | 2013-12-20 | 2017-06-07 | Tdk株式会社 | 希土類磁石 |
JP6142793B2 (ja) * | 2013-12-20 | 2017-06-07 | Tdk株式会社 | 希土類磁石 |
JP2017157625A (ja) * | 2016-02-29 | 2017-09-07 | Tdk株式会社 | 希土類焼結磁石 |
CN108878090B (zh) * | 2018-06-25 | 2020-05-12 | 天津三环乐喜新材料有限公司 | 一种无重稀土的钕铁硼烧结磁体及其制备方法 |
JP7091562B2 (ja) * | 2018-12-29 | 2022-06-27 | 三環瓦克華(北京)磁性器件有限公司 | 希土類磁石、希土類スパッタリング磁石、希土類拡散磁石及びその製造方法 |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2017045828A (ja) * | 2015-08-26 | 2017-03-02 | 日立金属株式会社 | R−t−b系焼結磁石 |
JP2017183710A (ja) * | 2016-03-28 | 2017-10-05 | Tdk株式会社 | R−t−b系永久磁石 |
JP2018125445A (ja) * | 2017-02-02 | 2018-08-09 | 日立金属株式会社 | R−t−b系焼結磁石 |
JP2018153008A (ja) * | 2017-03-13 | 2018-09-27 | Tdk株式会社 | モータ |
JP2020155476A (ja) * | 2019-03-18 | 2020-09-24 | Tdk株式会社 | R‐t‐b系永久磁石 |
JP7196708B2 (ja) | 2019-03-18 | 2022-12-27 | Tdk株式会社 | R‐t‐b系永久磁石 |
Also Published As
Publication number | Publication date |
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DE102014118984B4 (de) | 2018-08-30 |
JP6142794B2 (ja) | 2017-06-07 |
CN104733146B (zh) | 2017-06-23 |
CN104733146A (zh) | 2015-06-24 |
US10083783B2 (en) | 2018-09-25 |
DE102014118984A1 (de) | 2015-06-25 |
US20150179319A1 (en) | 2015-06-25 |
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