JP4055709B2 - アトマイズ法によるナノコンポジット磁石の製造方法 - Google Patents
アトマイズ法によるナノコンポジット磁石の製造方法 Download PDFInfo
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- H01F1/0579—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B with exchange spin coupling between hard and soft nanophases, e.g. nanocomposite spring magnets
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Description
上記組成を有する合金の溶湯からアトマイズ法によって永久磁石の粉末を作製するには、ガスアトマイズ法、遠心アトマイズ法、回転電極法、真空法、または衝撃法を用いることができる。遠心アトマイズ法および回転電極法を用いる場合には、高圧でガスを吹きつけて冷却速度を高めることが好ましい。
上述のガスアトマイズ装置によって作製された磁粉に対しては、その後に、アルゴン(Ar)などの不活性ガス雰囲気中で熱処理を実行することが望ましい。熱処理工程の昇温速度は、好ましくは、0.08℃/秒以上15℃/秒以下とし、500℃以上800℃以下の温度で30秒以上60分以下の時間保持した後、室温まで冷却する。この熱処理によって、ガスアトマイズによって粉末粒子中にアモルファス相が残存していた場合でも、ほぼ完全な結晶質組織が得られる。
Qは、その全量がB(硼素)から構成されるか、または、BおよびC(炭素)の組み合わせから構成される。Qの組成比率xが10原子%以下になると、アモルファス生成能が低くなりすぎ、ガスアトマイズ法による場合の冷却速度(102℃/秒〜104℃/秒程度)では、微細な結晶組織を形成することが困難になる。一方、Qの組成比率xが25原子%を超えると、構成相中で最も高い飽和磁化を有するα−Feの存在比率が減少し過ぎるため、残留磁束密度Brが低下してしまう。以上のことから、Qの組成比率xは10<x≦25原子%となるように設定することが好ましい。より好ましい組成比率xの範囲は10<x≦20原子%以下であり、更に好ましいxの範囲は13≦x≦18原子%である。
上記組成を有する合金の溶湯からアトマイズ法によって永久磁石の粉末を作製するには、ガスアトマイズ法、遠心アトマイズ法、回転電極法、真空法、または衝撃法を用いることができる。
表1に示す組成を有する試料(No.1〜4)の各々について、純度99.5%以上のNd、Pr、Fe、Co、B、C、Ti、Nb、Zr、Si、およびCuの材料を用いて総量が1kg(キログラム)となるように秤量し、以下の条件でガスアトマイズを行い、平均粒径50μm程度の粉末を作製した。その後、分級により粒径63μm以下の粉末を得た。
ガス圧:40kgf/cm2 (=3.92MPa)
噴霧温度:1400℃
溶湯供給速度:2.0kg/分
Claims (11)
- 組成式が(Fe1-mTm)100-x-y-z-nQxRyTizMn(TはCoおよびNiからなる群から選択された1種以上の元素、QはBおよびCからなる群から選択された少なくとも1種の元素、Rは希土類金属元素およびイットリウムからなる群から選択された少なくとも1種の元素、MはNb、Zr、Mo、Ta、およびHfからなる群から選択された少なくとも1種の元素)で表現され、組成比率x、y、z、m、およびnが、それぞれ、
10<x≦25原子%、
6≦y<10原子%、
0.1≦z≦12原子%、
0≦m≦0.5、および
0≦n≦10原子%
を満足し、
アトマイズ法によって作製された鉄基希土類合金のナノコンポジット磁石粉末であって、2種類以上の強磁性結晶相を含有し、R 2 Fe 14 B型化合物相からなる硬磁性相の平均サイズが10nm以上200nm以下、硼化物相およびα−Fe相からなる軟磁性相の平均サイズが1nm以上50nm以下の範囲内にあり、前記硼化物相およびα−Fe相の平均結晶粒径は、前記R 2 Fe 14 B型化合物相の平均結晶粒径よりも小さく、前記R 2 Fe 14 B型化合物相の粒界または亜粒界に存在している、鉄基希土類合金ナノコンポジット磁石粉末。 - 前記硼化物相は、強磁性の鉄基硼化物を含んでいる請求項1に記載の鉄基希土類合金ナノコンポジット磁石粉末。
- 前記鉄基硼化物は、Fe3Bおよび/またはFe23B6を含んでいることを特徴とする請求項2に記載の鉄基希土類合金ナノコンポジット磁石粉末。
- 平均粒径が1μm以上100μm以下の範囲内にある請求項1から3のいずれかに記載の鉄基希土類合金ナノコンポジット磁石粉末。
- 保磁力HcJ≧480kA/m、残留磁束密度Br≧0.6Tの硬磁気特性を有する請求項1から4のいずれかに記載の鉄基希土類合金ナノコンポジット磁石粉末。
- 請求項1から5のいずれかに記載された鉄基希土類合金ナノコンポジット磁石粉末を含むボンド磁石。
- 組成式が(Fe1-mTm)100-x-y-z-nQxRyTizMn(TはCoおよびNiからなる群から選択された1種以上の元素、QはBおよびCからなる群から選択された少なくとも1種の元素、Rは希土類金属元素およびイットリウムからなる群から選択された少なくとも1種の元素、MはNb、Zr、Mo、Ta、およびHfからなる群から選択された少なくとも1種の元素)で表現され、組成比率x、y、z、m、およびnが、それぞれ、
10<x≦25原子%、
6≦y<10原子%、
0.1≦z≦12原子%、
0≦m≦0.5、および
0≦n≦10原子%
を満足する合金の溶湯をアトマイズ法によって急冷することにより、希土類合金磁石粉末を作製する工程と、
前記磁石粉末に熱処理を施すことにより、2種類以上の強磁性結晶相を含有し、R 2 Fe 14 B型化合物相からなる硬磁性相の平均サイズが10nm以上200nm以下、硼化物相 およびα−Fe相からなる軟磁性相の平均サイズが1nm以上50nm以下の範囲内にあり、前記硼化物相およびα−Fe相の平均結晶粒径は、前記R 2 Fe 14 B型化合物相の平均結晶粒径よりも小さく、前記R 2 Fe 14 B型化合物相の粒界または亜粒界に存在している組織を形成する工程と、
を包含する鉄基希土類合金ナノコンポジット磁石粉末の製造方法。 - 前記アトマイズ法による急冷工程において、体積比率で60%以上のR2Fe14B型化合物相を含む急冷合金を作製する請求項7に記載の鉄基希土類合金ナノコンポジット磁石粉末の製造方法。
- 前記軟磁性相は、強磁性の鉄基硼化物を含んでいる請求項7または8に記載の鉄基希土類合金ナノコンポジット磁石粉末の製造方法。
- 前記鉄基硼化物は、Fe3Bおよび/またはFe23B6を含んでいる請求項9に記載の鉄基希土類合金ナノコンポジット磁石粉末の製造方法。
- 請求項7から10のいずれかに記載の製造方法によって作製された鉄基希土類合金ナノコンポジット磁石粉末を用意する工程と、
前記磁石粉末を用いてボンド磁石を作製する工程と
を包含するボンド磁石の製造方法。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001231560 | 2001-07-31 | ||
| JP2001231560 | 2001-07-31 | ||
| PCT/JP2002/007369 WO2003012802A1 (fr) | 2001-07-31 | 2002-07-19 | Procede de production d'aimant nanocomposite a l'aide d'un procede d'atomisation |
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| Publication Number | Publication Date |
|---|---|
| JPWO2003012802A1 JPWO2003012802A1 (ja) | 2004-11-25 |
| JP4055709B2 true JP4055709B2 (ja) | 2008-03-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2003517890A Expired - Fee Related JP4055709B2 (ja) | 2001-07-31 | 2002-07-19 | アトマイズ法によるナノコンポジット磁石の製造方法 |
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| Country | Link |
|---|---|
| US (1) | US7507302B2 (ja) |
| EP (1) | EP1414050B1 (ja) |
| JP (1) | JP4055709B2 (ja) |
| KR (1) | KR100535944B1 (ja) |
| CN (1) | CN1220990C (ja) |
| AT (1) | ATE343842T1 (ja) |
| DE (1) | DE60215665T2 (ja) |
| WO (1) | WO2003012802A1 (ja) |
Cited By (1)
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|---|---|---|---|---|
| CN108660307A (zh) * | 2018-04-16 | 2018-10-16 | 江苏大学 | 一种振动辅助激光冲击处理金属构件的表面强化方法 |
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| KR100562681B1 (ko) * | 2000-05-24 | 2006-03-23 | 가부시키가이샤 네오맥스 | 복수의 강자성상을 포함하는 영구자석 및 그 제조방법 |
| US7217328B2 (en) * | 2000-11-13 | 2007-05-15 | Neomax Co., Ltd. | Compound for rare-earth bonded magnet and bonded magnet using the compound |
| EP1388152A2 (en) * | 2001-05-15 | 2004-02-11 | Sumitomo Special Metals Company Limited | Iron-based rare earth alloy nanocomposite magnet and method for producing the same |
| ATE343842T1 (de) | 2001-07-31 | 2006-11-15 | Neomax Co Ltd | Verfahren zum herstellen eines nanozusammensetzungsmagneten unter verwendung eines atomisierungsverfahrens |
| AU2002366140A1 (en) * | 2001-11-22 | 2003-06-10 | Sumitomo Special Metals Co., Ltd. | Nanocomposite magnet |
| EP1589544A4 (en) * | 2003-01-28 | 2008-03-26 | Tdk Corp | HARD MAGNETIC COMPOSITION, PERMANENT MAGNET POWDER, PROCESS FOR PREPARING POWDER FOR PERMANENT MAGNET AND AGGLOMERIC MAGNET |
| KR101311058B1 (ko) * | 2004-12-16 | 2013-09-24 | 히타치 긴조쿠 가부시키가이샤 | 철기재의 희토류계 나노컴포지트 자석 및 그 제조방법 |
| JP5139386B2 (ja) * | 2009-09-01 | 2013-02-06 | 有限会社 ナプラ | コンポジット構造を有するナノ球状粒子、粉末、及び、その製造方法 |
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| US8891335B2 (en) | 2012-10-26 | 2014-11-18 | Laserphon, Inc. | Generation of ultra-high frequency sound |
| US9132451B1 (en) | 2012-10-26 | 2015-09-15 | Boris G. Tankhilevich | Using tunnel junction and bias for effective current injection into magnetic phonon-gain medium |
| WO2014205002A2 (en) | 2013-06-17 | 2014-12-24 | Miha Zakotnik | Magnet recycling to create nd-fe-b magnets with improved or restored magnetic performance |
| KR101683439B1 (ko) * | 2014-01-28 | 2016-12-08 | 한국생산기술연구원 | 희토류를 함유하는 영구자석 분말 및 이의 제조 방법 |
| US9336932B1 (en) | 2014-08-15 | 2016-05-10 | Urban Mining Company | Grain boundary engineering |
| US9418648B1 (en) | 2014-10-18 | 2016-08-16 | Boris G. Tankhilevich | Effective generation of ultra-high frequency sound in conductive ferromagnetic material |
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-
2002
- 2002-07-19 AT AT02749324T patent/ATE343842T1/de not_active IP Right Cessation
- 2002-07-19 CN CNB028022394A patent/CN1220990C/zh not_active Expired - Fee Related
- 2002-07-19 EP EP02749324A patent/EP1414050B1/en not_active Expired - Lifetime
- 2002-07-19 KR KR10-2003-7003240A patent/KR100535944B1/ko not_active Expired - Fee Related
- 2002-07-19 DE DE60215665T patent/DE60215665T2/de not_active Expired - Lifetime
- 2002-07-19 WO PCT/JP2002/007369 patent/WO2003012802A1/ja not_active Ceased
- 2002-07-19 JP JP2003517890A patent/JP4055709B2/ja not_active Expired - Fee Related
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108660307A (zh) * | 2018-04-16 | 2018-10-16 | 江苏大学 | 一种振动辅助激光冲击处理金属构件的表面强化方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| US20040194856A1 (en) | 2004-10-07 |
| KR20030041985A (ko) | 2003-05-27 |
| US7507302B2 (en) | 2009-03-24 |
| DE60215665D1 (de) | 2006-12-07 |
| EP1414050A4 (en) | 2005-03-16 |
| JPWO2003012802A1 (ja) | 2004-11-25 |
| ATE343842T1 (de) | 2006-11-15 |
| EP1414050B1 (en) | 2006-10-25 |
| CN1465076A (zh) | 2003-12-31 |
| EP1414050A1 (en) | 2004-04-28 |
| WO2003012802A1 (fr) | 2003-02-13 |
| DE60215665T2 (de) | 2007-02-08 |
| KR100535944B1 (ko) | 2005-12-12 |
| CN1220990C (zh) | 2005-09-28 |
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