JP5153643B2 - 希土類磁石 - Google Patents
希土類磁石 Download PDFInfo
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- C22C38/00—Ferrous alloys, e.g. steel alloys
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- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/18—Ferrous alloys, e.g. steel alloys containing chromium
- C22C38/32—Ferrous alloys, e.g. steel alloys containing chromium with boron
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- 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
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- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
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- B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
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- C22C2202/02—Magnetic
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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
- H01F1/058—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IVa elements, e.g. Gd2Fe14C
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Description
(実施例1〜23、比較例1〜9)
まず、希土類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、下記表1で表される実施例1〜23及び比較例1〜9の希土類磁石の組成が得られるように、それぞれ原料合金を作製した。
(Br、HcJ及びHk/HcJの測定)
実施例1〜23、比較例1〜9で得られた希土類磁石について、B−Hトレーサーを用いてBr(残留磁束密度)、HcJ(保磁力)及びHk/HcJ(角形比)をそれぞれ測定した。得られた結果を表1にまとめて示す。
Oの含有割合が0.05wt%であり、Bの含有割合が0.84〜1.00の範囲で異なる希土類磁石(比較例1、2及び実施例1〜5)、及び、Oの含有割合が0.036wt%であり、Bの含有割合が0.88〜0.96の範囲で異なる希土類磁石(実施例10〜13)について、Bの含有割合に対するBrの値をプロットしたグラフを図1に、HcJの値をプロットしたグラフを図2にそれぞれ示す。また、これらの図中には、比較のため、Oの含有割合が0.21又は0.22wt%(「約0.22wt%」とまとめて示す)であり、Bの含有割合が0.90〜0.97の範囲で異なる希土類磁石(比較例3〜6)について、Bの含有割合に対するBr又はHcJの値をそれぞれプロットして得られたグラフも併せて示す。
Cuの含有割合が0.00〜0.18の範囲で異なる希土類磁石(実施例4、6及び7並びに比較例8及び9)について、Cuの含有割合に対するBrの値をプロットしたグラフを図3に、HcJの値をプロットしたグラフを図4にそれぞれ示す。
Bの含有割合が0.90wt%であり、Oの含有割合が0.037〜0.22の範囲で異なる希土類磁石(実施例4、8、9及び12並びに比較例6)、及び、Bの含有割合が0.96又は0.97wt%(「0.97wt%」とまとめて示す)であり、Oの含有割合が0.036〜0.21の範囲で異なる希土類磁石(実施例1、10及び比較例3)について、Oの含有割合に対するBrの値をプロットしたグラフを図5に、HcJの値をプロットしたグラフを図6にそれぞれ示す。
(実施例24〜28)
下記表2で表される実施例24〜28の組成が得られるようにしたこと以外は、実施例1等と同様にして実施例24〜28の希土類磁石をそれぞれ作製した。これらは、実施例1等の組成に加えて、更にGaを主たる構成元素として含む組成を有するものである。
(Br、HcJ及びHk/HcJの測定)
実施例24〜28で得られた希土類磁石について、実施例1等と同様にしてBr(残留磁束密度)、HcJ(保磁力)及びHk/HcJ(角形比)をそれぞれ測定した。得られた結果を表2にまとめて示す。
Claims (2)
- R(但し、RはYを含む希土類元素から選ばれる1種以上の元素であって、Nd及びDyを必須成分として含む)、B、Al、Cu、Zr、Co、O、C及びFeから主として構成され、
各元素の含有割合が、
R:25〜34質量%(但し、Dyが0.1〜8質量%)、
B:0.87〜0.97質量%、
Al:0.03〜0.3質量%、
Cu:0.03〜0.11質量%、
Zr:0.03〜0.25質量%、
Co:3質量%以下(但し、0質量%を含まず。)、
O:0.03〜0.1質量%、
C:0.03〜0.15質量%、
Fe:残部、
である、ことを特徴とする希土類磁石。 - R(但し、RはYを含む希土類元素から選ばれる1種以上の元素であって、Nd及びDyを必須成分として含む)、B、Al、Cu、Zr、Co、O、C、Fe及びGaから主として構成され、
各元素の含有割合が、
R:25〜34質量%(但し、Dyが0.1〜8質量%)、
B:0.87〜0.97質量%、
Al:0.03〜0.3質量%、
Cu:0.03〜0.11質量%、
Zr:0.03〜0.25質量%、
Co:3質量%以下(但し、0質量%を含まず。)、
O:0.03〜0.1質量%、
C:0.03〜0.15質量%、
Ga:0.2質量%以下(但し、0質量%を含まず)、
Fe:残部、
である、ことを特徴とする希土類磁石。
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JP2008544690A JP5153643B2 (ja) | 2007-06-29 | 2008-06-27 | 希土類磁石 |
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JP2007172789 | 2007-06-29 | ||
JP2007172789 | 2007-06-29 | ||
JP2008544690A JP5153643B2 (ja) | 2007-06-29 | 2008-06-27 | 希土類磁石 |
PCT/JP2008/061704 WO2009004994A1 (ja) | 2007-06-29 | 2008-06-27 | 希土類磁石 |
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JP5153643B2 true JP5153643B2 (ja) | 2013-02-27 |
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US (1) | US8152936B2 (ja) |
EP (1) | EP2172947B1 (ja) |
JP (2) | JP5153643B2 (ja) |
CN (2) | CN105118593A (ja) |
WO (1) | WO2009004994A1 (ja) |
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JP4766453B2 (ja) * | 2005-03-16 | 2011-09-07 | Tdk株式会社 | 希土類永久磁石 |
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JP5310923B2 (ja) | 2013-10-09 |
US20100233016A1 (en) | 2010-09-16 |
CN105118593A (zh) | 2015-12-02 |
CN101542644A (zh) | 2009-09-23 |
JPWO2009004994A1 (ja) | 2010-08-26 |
EP2172947A4 (en) | 2017-03-22 |
EP2172947A1 (en) | 2010-04-07 |
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EP2172947B1 (en) | 2020-01-22 |
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