JP2010245392A - ネオジウム鉄ボロン系の焼結磁石 - Google Patents
ネオジウム鉄ボロン系の焼結磁石 Download PDFInfo
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- JP2010245392A JP2010245392A JP2009094068A JP2009094068A JP2010245392A JP 2010245392 A JP2010245392 A JP 2010245392A JP 2009094068 A JP2009094068 A JP 2009094068A JP 2009094068 A JP2009094068 A JP 2009094068A JP 2010245392 A JP2010245392 A JP 2010245392A
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- sintered magnet
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- 229910001172 neodymium magnet Inorganic materials 0.000 title claims abstract description 15
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 title claims abstract description 13
- 239000012071 phase Substances 0.000 claims abstract description 38
- 229910052692 Dysprosium Inorganic materials 0.000 claims abstract description 33
- 229910052771 Terbium Inorganic materials 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 22
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 20
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 15
- 239000000956 alloy Substances 0.000 claims abstract description 15
- QEFYFXOXNSNQGX-UHFFFAOYSA-N neodymium atom Chemical compound [Nd] QEFYFXOXNSNQGX-UHFFFAOYSA-N 0.000 claims abstract description 15
- KBQHZAAAGSGFKK-UHFFFAOYSA-N dysprosium atom Chemical compound [Dy] KBQHZAAAGSGFKK-UHFFFAOYSA-N 0.000 claims abstract description 14
- GZCRRIHWUXGPOV-UHFFFAOYSA-N terbium atom Chemical compound [Tb] GZCRRIHWUXGPOV-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 239000002994 raw material Substances 0.000 claims abstract description 13
- 229910052761 rare earth metal Inorganic materials 0.000 claims abstract description 12
- 238000005245 sintering Methods 0.000 claims abstract description 9
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract description 6
- 239000007791 liquid phase Substances 0.000 claims abstract description 5
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims abstract description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 9
- 239000001301 oxygen Substances 0.000 claims description 9
- 229910052760 oxygen Inorganic materials 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 2
- 239000013078 crystal Substances 0.000 abstract description 36
- 238000001704 evaporation Methods 0.000 description 42
- 230000008020 evaporation Effects 0.000 description 35
- 239000000463 material Substances 0.000 description 35
- 239000011261 inert gas Substances 0.000 description 27
- 239000000047 product Substances 0.000 description 19
- 238000000034 method Methods 0.000 description 16
- 229910052751 metal Inorganic materials 0.000 description 15
- 239000002184 metal Substances 0.000 description 15
- 125000006850 spacer group Chemical group 0.000 description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 13
- 238000009792 diffusion process Methods 0.000 description 8
- 230000005347 demagnetization Effects 0.000 description 7
- 230000001771 impaired effect Effects 0.000 description 7
- 238000004453 electron probe microanalysis Methods 0.000 description 6
- 230000004907 flux Effects 0.000 description 6
- 238000010298 pulverizing process Methods 0.000 description 6
- 239000010409 thin film Substances 0.000 description 6
- 238000004458 analytical method Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 229910052742 iron Inorganic materials 0.000 description 5
- 230000005415 magnetization Effects 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 238000000137 annealing Methods 0.000 description 3
- 229910052796 boron Inorganic materials 0.000 description 3
- 238000000748 compression moulding Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 239000010408 film Substances 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 238000013507 mapping Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910001182 Mo alloy Inorganic materials 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052733 gallium Inorganic materials 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 229910052758 niobium Inorganic materials 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- JZQOJFLIJNRDHK-CMDGGOBGSA-N alpha-irone Chemical compound CC1CC=C(C)C(\C=C\C(C)=O)C1(C)C JZQOJFLIJNRDHK-CMDGGOBGSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000009750 centrifugal casting Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 239000000700 radioactive tracer Substances 0.000 description 1
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Abstract
【解決手段】 本発明のネオジウム鉄ボロン系の焼結磁石は、ネオジウム、プラセオジウム、ジスプロシウム及びテルビウムのうち少なくとも1つを含む希土類元素を有する合金原料を磁場配向させて液相焼結してなるものであり、焼結磁石表面に付着させたジスプロシウム及びテルビウムのうち少なくとも一方を熱処理により焼結磁石の結晶粒界に拡散させることで、前記焼結磁石の結晶粒界のネオジウムの濃度が主相のものより低く、かつ、前記結晶粒界のジスプロシウムまたはテルビウムの濃度が主相のもの高い組成を備える。
【選択図】 図4
Description
S 焼結磁石
S1 二次焼結体
v 蒸発材料
Claims (2)
- ネオジウム、プラセオジウム、ジスプロシウム及びテルビウムのうち少なくとも1つを含む希土類元素を有する合金原料を磁場配向させて液相焼結してなるネオジウム鉄ボロン系の焼結磁石であって、
前記焼結磁石表面に付着させたジスプロシウム及びテルビウムのうち少なくとも一方を熱処理により焼結磁石の結晶粒界に拡散させることで、前記焼結磁石の結晶粒界のネオジウムの濃度が主相のものより低く、かつ、前記結晶粒界のジスプロシウムまたはテルビウムの濃度が主相のもの高い組成を備えることを特徴とするネオジウム鉄ボロン系の焼結磁石。 - 前記結晶粒界のジスプロシウムまたはテルビウムが磁石表面からその中心に向かって含有濃度が薄くなる分布を持って存在し、その表面にDy及びTbの少なくとも一方が均一に存在し、かつ、酸素濃度が均一であることを特徴とする請求項1記載のネオジウム鉄ボロン系の焼結磁石。
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JP2010245392A true JP2010245392A (ja) | 2010-10-28 |
JP2010245392A5 JP2010245392A5 (ja) | 2012-05-10 |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007102391A1 (ja) * | 2006-03-03 | 2007-09-13 | Hitachi Metals, Ltd. | R-Fe-B系希土類焼結磁石およびその製造方法 |
WO2008023731A1 (en) * | 2006-08-23 | 2008-02-28 | Ulvac, Inc. | Permanent magnet and process for producing the same |
WO2009004794A1 (ja) * | 2007-07-02 | 2009-01-08 | Hitachi Metals, Ltd. | R-Fe-B系希土類焼結磁石およびその製造方法 |
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2009
- 2009-04-08 JP JP2009094068A patent/JP2010245392A/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007102391A1 (ja) * | 2006-03-03 | 2007-09-13 | Hitachi Metals, Ltd. | R-Fe-B系希土類焼結磁石およびその製造方法 |
WO2008023731A1 (en) * | 2006-08-23 | 2008-02-28 | Ulvac, Inc. | Permanent magnet and process for producing the same |
WO2009004794A1 (ja) * | 2007-07-02 | 2009-01-08 | Hitachi Metals, Ltd. | R-Fe-B系希土類焼結磁石およびその製造方法 |
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