WO2016093379A1 - 비자성 합금을 포함하는 열간가압변형 자석 및 이의 제조방법 - Google Patents
비자성 합금을 포함하는 열간가압변형 자석 및 이의 제조방법 Download PDFInfo
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Abstract
Description
비자성 합금의 첨가량 (중량%) | 열처리 전 (kOe)(실시예 2) | 열처리 후 (kOe)(실시예 4) | 향상률 (%) |
0.0 (비교예 1) | 14.2 | 15.2 | 7 |
0.5 (실시예 2-1, 4-1) | 15.9 | 17.9 | 13 |
1.0 (실시예 2-2, 4-2) | 16.6 | 18.5 | 11 |
1.5 (실시예 2-3, 4-3) | 17.1 | 18.9 | 11 |
Claims (15)
- (i) 이방화된 판상형의 결정립; 및(ii) 상기 결정립의 경계면에 분포된 비자성 합금을 포함하는 R-TM-B (여기서, R은 Nd, Dy, Pr, Tb, Ho, Sm, Sc, Y, La, Ce, Pm, Eu, Gd, Er, Tm, Yb, Lu 및 이들의 조합으로 이루어진 군에서 선택되는 희토류 금속이고, TM은 전이금속을 의미함) 열간가압변형 자석.
- 제1항에 있어서,상기 R-TM-B 열간가압변형 자석은 하기 화학식 1로 표시되는 것인 자석:[화학식 1](R'1-xR"x)2TM14B(여기서, R' 및 R"은 각각 Nd, Dy, Pr, Tb, Ho, Sm, Sc, Y, La, Ce, Pm, Eu, Gd, Er, Tm, Yb, Lu 및 이들의 조합으로 이루어진 군에서 선택되는 희토류 금속이고, x는 0≤ x ≤ 1.0인 실수이다).
- 제1항에 있어서,상기 비자성 합금은 하기 화학식 2로 표시되는 것인 자석:[화학식 2]TaM1-a(여기서, T는 Nd, Dy, Pr, Tb, Ho, Sm, Sc, Y, La, Ce, Pm, Eu, Gd, Er, Tm, Yb, Lu 및 이들의 조합으로 이루어진 군에서 선택된 어느 하나의 원소이며, M은 Cu, Al, Sb, Bi, Ga, Zn, Ni, Mg, Ba, B, Co, Fe, In, Pt, Ta 및 이들의 조합으로 이루어진 군에서 선택된 어느 하나의 금속원소이고, a는 0 < a < 1인 실수이다).
- 제1항에 있어서,상기 비자성 합금은 Nd0.84Cu0.16, Nd0.7Cu0.3, Nd0.85Al0.15, Nd0.08Al0.92, Nd0.03Sb0.97, Nd0.8Ga0.2, Nd0.769Zn0.231, Nd0.07Mg0.93, Pr0.84 Cu0.16, Pr0.7Cu0.3, Pr0.85Al0.15, Pr0.08Al0.92, Pr0.03Sb0.97, Pr0.8Ga0.2, Pr0.769Zn0.231, Pr0.07Mg0.93, Bi, Ga, Ni, Co 및 이들의 조합으로 이루어진 군으로부터 선택되는 어느 하나를 포함하는 것인 자석.
- 제1항에 있어서,상기 비자성 합금은 융점이 400 내지 700℃인 것을 특징으로 하는 자석.
- 제1항에 있어서, 상기 결정립은 그 직경이 100 내지 1000 nm인 것을 특징으로 하는 자석.
- (a) R-TM-B (여기서, R은 Nd, Dy, Pr, Tb, Ho, Sm, Sc, Y, La, Ce, Pm, Eu, Gd, Er, Tm, Yb, Lu 및 이들의 조합으로 이루어진 군에서 선택되는 희토류 금속이고, TM은 전이금속을 의미함) 합금으로부터 자성분말을 준비하는 단계;(b) 상기 자성분말을 가압소결하여 소결체를 제조하는 단계; 및(c) 열과 압력을 가하여 상기 소결체를 열간가압변형 (hot deformation) 하는 단계를 포함하고,상기 단계 (a)의 R-TM-B 합금의 제조시, 또는 상기 단계 (b)의 가압소결 전에 비자성 합금을 첨가하는 것을 포함하는 것을 특징으로 하는 R-TM-B 열간가압변형 자석의 제조방법.
- 제7에 있어서,상기 자성분말은 HDDR (Hydrogenation Disproportionation Desorption and Recombination) 공정, 용융방사 (melt spinning) 공정, 급속고형화 (rapid solidification) 공정 및 이들의 조합으로 이루어진 군에서 선택된 어느 하나의 공정에 의해 제조된 자성분말을 포함하는 것인 제조방법.
- 제7항에 있어서, 상기 비자성 합금은, 상기 자성분말의 중량을 기준으로 0.01 내지 10 중량%로 첨가되는 것을 특징으로 하는 제조방법.
- 제7항에 있어서,상기 단계 (b)는 온도 300 내지 800℃에서 수행되는 것인 제조방법.
- 제7항에 있어서,상기 단계 (c)는 온도 500 내지 1000℃에서 수행되는 것인 제조방법.
- 제7항에 있어서,상기 비자성 합금은 상기 단계 (b)의 가압소결 전에 첨가되어 자성분말과 혼합되는 것인 제조방법.
- 제12항에 있어서,상기 단계 (b) 및 (c)의 사이에, 상기 소결체에 추가열처리를 수행하는 단계를 더 포함하는 것인 제조방법.
- 제13항에 있어서,상기 추가열처리는 온도 400 내지 800℃에서 수행되는 것인 제조방법.
- 제7항에 있어서, 상기 단계 (c)에서의 열간가압변형의 변형률이 50 내지 80%인 것을 특징으로 하는 제조방법.
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JP2017522941A JP2018505540A (ja) | 2014-12-08 | 2014-12-08 | 非磁性合金を含む熱間加圧変形磁石及びその製造方法 |
PCT/KR2014/012006 WO2016093379A1 (ko) | 2014-12-08 | 2014-12-08 | 비자성 합금을 포함하는 열간가압변형 자석 및 이의 제조방법 |
CN201480083350.7A CN107077935A (zh) | 2014-12-08 | 2014-12-08 | 包含非磁性合金的热压变形的磁体及其制造方法 |
US15/521,131 US10950373B2 (en) | 2014-12-08 | 2014-12-08 | Hot-pressed and deformed magnet comprising nonmagnetic alloy and method for manufacturing same |
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US8092867B2 (en) | 2006-10-06 | 2012-01-10 | Kovio, Inc. | Silicon polymers, methods of polymerizing silicon compounds, and methods of forming thin films from such silicon polymers |
JP6610957B2 (ja) * | 2016-08-17 | 2019-11-27 | 日立金属株式会社 | R−t−b系焼結磁石の製造方法 |
CN109338166A (zh) * | 2018-09-25 | 2019-02-15 | 全球能源互联网研究院有限公司 | 一种Al-Er-B耐热合金单丝及其制备方法 |
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CN114678180B (zh) * | 2022-03-21 | 2023-04-14 | 电子科技大学 | 具有低场旋转磁热效应的多晶HoB2合金及其制备方法 |
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JP2018505540A (ja) | 2018-02-22 |
US20170330658A1 (en) | 2017-11-16 |
CN107077935A (zh) | 2017-08-18 |
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