JP2017157625A - 希土類焼結磁石 - Google Patents
希土類焼結磁石 Download PDFInfo
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- JP2017157625A JP2017157625A JP2016037793A JP2016037793A JP2017157625A JP 2017157625 A JP2017157625 A JP 2017157625A JP 2016037793 A JP2016037793 A JP 2016037793A JP 2016037793 A JP2016037793 A JP 2016037793A JP 2017157625 A JP2017157625 A JP 2017157625A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/02—Details of the magnetic circuit characterised by the magnetic material
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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
- H01F1/0536—Alloys characterised by their composition containing rare earth metals sintered
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- 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
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
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- 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
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- 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
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- 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
- C22C38/06—Ferrous alloys, e.g. steel alloys containing aluminium
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- 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
- C22C38/10—Ferrous alloys, e.g. steel alloys containing cobalt
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- 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
- C22C38/14—Ferrous alloys, e.g. steel alloys containing titanium or zirconium
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- 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
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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
-
- 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
-
- 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
- H01F1/086—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 sintered
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Hard Magnetic Materials (AREA)
- Powder Metallurgy (AREA)
- Manufacturing Cores, Coils, And Magnets (AREA)
Abstract
【解決手段】 主相および粒界を含む希土類焼結磁石である。粒界が主相より電気抵抗が高い領域を含む。
【選択図】 なし
Description
主相および粒界を含む希土類焼結磁石であって、
前記粒界が前記主相より電気抵抗が高い領域を含むことを特徴とする。
本実施形態に係る希土類焼結磁石はR−T−B系希土類焼結磁石である。
次に、本実施形態に係るR−T−B系焼結磁石の製造方法を説明する。
まず、焼結磁石の原料金属を準備し、これらを用いてストリップキャスティング法により、23.8Nd−7.2Pr―0.85B−2.0Co−0.4Al−0.3Cu−0.4Ga−0.2Zr−0.07O−0.12C−0.06N―残部Fe(単位:質量%)である焼結磁石の組成が得られるように、原料合金を作製した。なお、各元素の含有量は、Nd,Pr,Fe,Co,Ga,Al,CuおよびZrについては、蛍光X線分析により測定した。Bについては、ICP発光分析により測定した。Oについては、不活性ガス融解―非分散型赤外線吸収法により測定した。Nについては、不活性ガス融解−熱伝導度法により測定した。
上記の焼結磁石について、B−Hトレーサーを用いて、残留磁束密度Brおよび保磁力HcJをそれぞれ測定した。その結果、Br=1390mT、HcJ=1616kA/mであった。
上記の焼結磁石について、電気抵抗および硬さの観察を行った。具体的には、SPMのSSRMモードを使用した。装置は(株)日立ハイテクサイエンス製のAFM5000およびAFM5300Eを用いた。本実施例では、探針にはBドープダイヤモンドコートタイプのものを使用した。また、SSRMモードを使用する際には、探針のダメージ抑制および研磨屑の影響抑制のため、SISモードで行った。
2…主相
10,12…粒界
10a,12a…粒界三重点
10b,12b…二粒子粒界
20,22…測定線
20a,20b,22a,22b…主相と粒界との境界点
Claims (11)
- 主相および粒界を含む希土類焼結磁石であって、
前記粒界が前記主相より電気抵抗が高い領域を含むことを特徴とする希土類焼結磁石。 - 前記希土類焼結磁石全体を100質量%とする場合に、R:28.5〜33.5質量%、B:0.7〜1.1質量%、Al:0.03〜0.6質量%、Cu:0.01〜1.5質量%、Co:0〜3.0質量%(0を含まない)、Ga:0〜1.0質量%(0を含む)、Zr:0〜1.5質量%(0を含む)、O:0.03〜0.8質量%、C:0.02〜0.3質量%、N:0.01〜0.1質量%で含まれる請求項1に記載の希土類焼結磁石。
- 前記電気抵抗が高い領域が粒界三重点に存在する請求項1または2に記載の希土類焼結磁石。
- 前記電気抵抗が高い領域の中で最も高い電気抵抗が、前記主相における電気抵抗が最も低い電気抵抗の10倍以上である請求項1〜3のいずれかに記載の希土類焼結磁石。
- 前記電気抵抗が高い領域における電気抵抗の平均値が、前記主相における電気抵抗の平均値の10倍以上である請求項1〜4のいずれかに記載の希土類焼結磁石。
- 前記電気抵抗が高い領域が前記主相より柔らかい請求項1〜5のいずれかに記載の希土類焼結磁石。
- 前記粒界が前記主相より電気抵抗が低い領域を含む請求項1〜6のいずれかに記載の希土類焼結磁石。
- 前記電気抵抗が低い領域が二粒子粒界に存在する請求項7に記載の希土類焼結磁石。
- 前記電気抵抗が低い領域の中で電気抵抗が最も低い点における電気抵抗が、前記主相における電気抵抗が最も高い点の電気抵抗の0.1倍以下である請求項7または8に記載の希土類焼結磁石。
- 前記電気抵抗が低い領域における電気抵抗の平均値が、前記主相における電気抵抗の平均値の0.1倍以下である請求項7〜9のいずれかに記載の希土類焼結磁石。
- 前記電気抵抗が低い領域が前記主相より硬い請求項7〜10のいずれかに記載の希土類焼結磁石。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2016037793A JP2017157625A (ja) | 2016-02-29 | 2016-02-29 | 希土類焼結磁石 |
US15/443,748 US10453595B2 (en) | 2016-02-29 | 2017-02-27 | Rare earth permanent magnet |
DE102017203197.2A DE102017203197A1 (de) | 2016-02-29 | 2017-02-28 | Seltenerd-Permanentmagnet |
CN201710114286.XA CN107134864B (zh) | 2016-02-29 | 2017-02-28 | 稀土类永久磁铁 |
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JP2016037793A JP2017157625A (ja) | 2016-02-29 | 2016-02-29 | 希土類焼結磁石 |
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US (1) | US10453595B2 (ja) |
JP (1) | JP2017157625A (ja) |
CN (1) | CN107134864B (ja) |
DE (1) | DE102017203197A1 (ja) |
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JP6992634B2 (ja) | 2018-03-22 | 2022-02-03 | Tdk株式会社 | R-t-b系永久磁石 |
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- 2016-02-29 JP JP2016037793A patent/JP2017157625A/ja active Pending
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2017
- 2017-02-27 US US15/443,748 patent/US10453595B2/en active Active
- 2017-02-28 DE DE102017203197.2A patent/DE102017203197A1/de active Pending
- 2017-02-28 CN CN201710114286.XA patent/CN107134864B/zh active Active
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JPH09232122A (ja) * | 1996-02-27 | 1997-09-05 | Hitachi Metals Ltd | 高電気抵抗希土類永久磁石およびその製造方法 |
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Publication number | Publication date |
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US10453595B2 (en) | 2019-10-22 |
CN107134864A (zh) | 2017-09-05 |
US20170250014A1 (en) | 2017-08-31 |
CN107134864B (zh) | 2020-06-02 |
DE102017203197A1 (de) | 2017-08-31 |
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