JP5267800B2 - 自己修復性希土類−鉄系磁石 - Google Patents
自己修復性希土類−鉄系磁石 Download PDFInfo
- Publication number
- JP5267800B2 JP5267800B2 JP2009044970A JP2009044970A JP5267800B2 JP 5267800 B2 JP5267800 B2 JP 5267800B2 JP 2009044970 A JP2009044970 A JP 2009044970A JP 2009044970 A JP2009044970 A JP 2009044970A JP 5267800 B2 JP5267800 B2 JP 5267800B2
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- JP
- Japan
- Prior art keywords
- magnet
- self
- iron
- rare earth
- segment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Classifications
-
- 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
- H01F1/0578—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 bonded together
-
- 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
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C2202/00—Physical properties
- C22C2202/02—Magnetic
-
- 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
- H01F41/0273—Imparting anisotropy
Description
粒子径3〜5μmのSm2Fe17N3(Mr = 1.22 T、HcJ = 0.91 MA/m、(BH)max = 240 kJ/m3)、粒子径38〜150μmのNd2Fe14B(Mr = 1.34 T、HcJ = 1.15 MA/m、(BH)max = 316 kJ/m3)両者の体積分率80.8 vol.%とし、残部19.2 vol.%は磁石粉体を固定する架橋反応相としてエポキシ当量205〜220 g/eq、融点70−76 ℃のo−クレゾールノボラック型エポキシオリゴマー6.5 vol.%、熱分解温度230℃のイミダゾール誘導体(2−フェニル−4,5−ジヒドロキシメチルイミダゾール) 1.8 vol.%、およびすべり変形相の鎖状分子として、前記オリゴマーのオキサゾリドン環と化学結合する分子鎖内アミノ活性水素をもつ平均分子量Mw 4000〜12000の線状ポリアミド9.1 vol.%、内部滑剤としてペンタエリスリトールと高級脂肪酸との部分エステル化物1.8 vol.%を使用した。これは、1分子中1つの水酸基(−OH)、炭素数16のヘキサデシル基(−(CH2)16CH3)を3つ有するものであり、これにより極性基は鎖状分子との相溶性、ヘキサデシル基はすべり流動による自己修復性の向上を図る。
図6(a)に示す断面形状の自己修復性セグメントSeg.61を図5(b)のM−H ループが得られる調整条件、すなわち温度160℃、磁界1.4 MA/m、圧力50 MPaで本実施例にかかるコンパウンドを用いて用意した。図6(a)のように自己修復性セグメントの形状は外半径3.46 mm、内半径1.84 mmであり、一様な磁界Hexの方向との関係から磁石粉体の整列はC axisで示す方向、いわゆるパラレル配向である。
つぎに、図3(a)(b)(c)で示したような、本発明にかかる自己修復性セグメントの内外周面を拘束し、熱と外力に応じた破断面の生成、並びにすべり変形に基づき異方性の程度を崩さずに異方性の方向のみが変化する自己修復作用を原理とした異方性方向制御に関する実施例を説明する。
10−2: 自己修復したセグメント断面
Hex: 外部磁界
Hθ: 10−1の外周接線とHexとのなす角
Mθ: 10−2外周接線とC軸とのなす角
11、12、13: 10−1から得た円柱試料
21、22、23: 10−2から得た円柱試料
Claims (6)
- 整列した1種または2種以上の希土類−鉄系磁石粉体を架橋反応相で固定化するとともに、該粉体間で架橋反応相と粘性流動に基づくすべり変形相を化学的に結合し、ゲル化した不完全3次元網目構造を有するマトリクスを介在させたセグメントとし、さらにその内外周面を拘束し、熱と外力に応じたすべり変形と架橋反応に基づく自己修復作用で破断面、必要に応じてセグメント相互を統合し、一体的に剛体化した自己修復性希土類−鉄系磁石。
- 希土類−鉄系磁石粉体の1種、または2種以上の最大エネルギー積(BH)maxが250 kJ/m3以上であり、かつ、その体積分率が80 vol.%以上である請求項1記載の自己修復性希土類−鉄系磁石。
- 希土類−鉄系磁石粉体、架橋反応相、すべり変形相の体積分率の総和が97 vol.%以上、空隙が3 vol.%以下である請求項1記載の自己修復性希土類−鉄系磁石。
- セグメント、並びにそれに対応する磁石の最大磁化Mmaxの差が0.03 T以下、異方性分散σの差が7%以下である請求項1記載の自己修復性希土類−鉄系磁石。
- 残留磁化Mr 0.95T以上、保磁力HcJ 0.95 MA/m以上、(BH)max 160 kJ/m3以上である請求項1記載の自己修復性希土類−鉄系磁石。
- 円弧状、円筒状など環状形状、極対数1以上、およびパーミアンス係数Pc 3以上で鉄心との磁気回路を構成する請求項1記載の自己修復性希土類−鉄系磁石。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009044970A JP5267800B2 (ja) | 2009-02-27 | 2009-02-27 | 自己修復性希土類−鉄系磁石 |
US12/706,389 US20100219921A1 (en) | 2009-02-27 | 2010-02-16 | Rare-earth iron-based magnet with self-recoverability |
EP10001666.6A EP2226814B1 (en) | 2009-02-27 | 2010-02-18 | Rare-earth iron-based magnet with self-recoverability |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009044970A JP5267800B2 (ja) | 2009-02-27 | 2009-02-27 | 自己修復性希土類−鉄系磁石 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2010199448A JP2010199448A (ja) | 2010-09-09 |
JP5267800B2 true JP5267800B2 (ja) | 2013-08-21 |
Family
ID=42194706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2009044970A Expired - Fee Related JP5267800B2 (ja) | 2009-02-27 | 2009-02-27 | 自己修復性希土類−鉄系磁石 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20100219921A1 (ja) |
EP (1) | EP2226814B1 (ja) |
JP (1) | JP5267800B2 (ja) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
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US9064625B2 (en) * | 2011-08-09 | 2015-06-23 | Electron Energy Corporation | Methods for sequentially laminating rare earth permanent magnets with suflide-based dielectric layer |
JP5752094B2 (ja) * | 2012-08-08 | 2015-07-22 | ミネベア株式会社 | フルデンス希土類−鉄系ボンド磁石の製造方法 |
KR101696710B1 (ko) * | 2015-01-28 | 2017-01-16 | 엘지전자 주식회사 | 비엘디시 모터 및 그를 갖는 청소기 |
DE102015107486A1 (de) * | 2015-05-12 | 2016-11-17 | Technische Universität Darmstadt | Künstlicher Dauermagnet und Verfahren zur Herstellung des künstlichen Dauermagneten |
JP2017022191A (ja) * | 2015-07-08 | 2017-01-26 | 株式会社ジェイテクト | 磁石の製造方法及び磁石 |
CN105218999B (zh) * | 2015-09-22 | 2017-03-29 | 清华大学 | 一种磁致发热自修复热塑型纳米复合材料 |
CN108701518B (zh) * | 2016-03-04 | 2020-12-22 | 国立研究开发法人产业技术综合研究所 | 钐-铁-氮合金粉末及其制造方法 |
WO2018071723A1 (en) * | 2016-10-12 | 2018-04-19 | Joseph Wang | Printed flexible electronic devices containing self-repairing structures |
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-
2009
- 2009-02-27 JP JP2009044970A patent/JP5267800B2/ja not_active Expired - Fee Related
-
2010
- 2010-02-16 US US12/706,389 patent/US20100219921A1/en not_active Abandoned
- 2010-02-18 EP EP10001666.6A patent/EP2226814B1/en not_active Not-in-force
Also Published As
Publication number | Publication date |
---|---|
US20100219921A1 (en) | 2010-09-02 |
EP2226814B1 (en) | 2015-10-07 |
JP2010199448A (ja) | 2010-09-09 |
EP2226814A1 (en) | 2010-09-08 |
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