JP2022549995A - 焼結磁石の製造方法 - Google Patents
焼結磁石の製造方法 Download PDFInfo
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- JP2022549995A JP2022549995A JP2022506941A JP2022506941A JP2022549995A JP 2022549995 A JP2022549995 A JP 2022549995A JP 2022506941 A JP2022506941 A JP 2022506941A JP 2022506941 A JP2022506941 A JP 2022506941A JP 2022549995 A JP2022549995 A JP 2022549995A
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- sintered magnet
- eutectic alloy
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- powder
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Abstract
Description
本出願は、2019年10月7日付韓国特許出願第10-2019-0123870号に基づいた優先権の利益を主張し、当該韓国特許出願の文献に開示された全ての内容は本明細書の一部として組み含まれる。
Nd2O3 104.975g、Pr2O3 54.368g、Fe 294.75g、Cu 0.45g、Co 13.5g、B 4.95g、Al 1.35g、Ca 91.5gおよびMg 9gを均一に混合して混合物を製造する。
PrH2 85.74g、Al 4.6g、Cu 5.4gおよび液状のGa 6.0gを利用して実施例1と同様な方法で共晶合金を製造した。このように製造された共晶合金は、Pr 63.6at%、Al 18.2at%、Cu 9.1at%、Ga 9.1at%である。
PrH2 89.4g、Al 4.9g、およびCu 5.8gを利用して実施例1と同様な方法で共晶合金を製造した。このように製造された共晶合金は、Pr 70at%、Al 20at%、Cu 10at%である。
図1~図3は、それぞれ実施例1、実施例2および比較例1で製造された焼結磁石に対するB-H測定グラフである。
Claims (7)
- R-Fe-B系磁石粉末を製造する段階;
前記R-Fe-B系磁石粉末を焼結して焼結磁石を製造する段階;
Pr、Al、CuおよびGaを含む共晶合金(Eutectic alloy)を製造する段階;および
前記共晶合金を前記焼結磁石に溶浸(Infiltration)処理する段階を含み、
前記Rは、Nd、Pr、Dy、CeまたはTbであり、
前記溶浸処理する段階は、前記共晶合金を前記焼結磁石に塗布する段階、および前記共晶合金が塗布された焼結磁石を熱処理する段階を含む焼結磁石の製造方法。 - 前記熱処理する段階は、摂氏500度~1000度で加熱する段階を含む、請求項1に記載の焼結磁石の製造方法。
- 前記熱処理する段階は、摂氏800度~1000度で加熱する1次熱処理段階、および摂氏500度~600度で加熱する2次熱処理段階を含む、請求項1に記載の焼結磁石の製造方法。
- 前記R-Fe-B系磁石粉末を製造する段階は、還元拡散法を通じて前記R-Fe-B系磁石粉末を合成する段階を含む、請求項1に記載の焼結磁石の製造方法。
- 前記Gaの含有量は、前記共晶合金に対して1~20at%である、請求項1に記載の焼結磁石の製造方法。
- 前記共晶合金を製造する段階は、
PrH2、Al、CuおよびGaを混合して共晶合金用混合物を製造する段階、前記共晶合金用混合物を冷間等方圧加圧法で加圧する段階、および前記加圧した共晶合金用混合物を加熱する段階を含む、請求項1に記載の焼結磁石の製造方法。 - 前記R-Fe-B系磁石粉末は、NdFeB系磁石粉末を含む、請求項1に記載の焼結磁石の製造方法。
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KR10-2019-0123870 | 2019-10-07 | ||
KR1020190123870A KR102632582B1 (ko) | 2019-10-07 | 2019-10-07 | 소결 자석의 제조 방법 |
PCT/KR2020/013643 WO2021071236A1 (ko) | 2019-10-07 | 2020-10-07 | 소결 자석의 제조 방법 |
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