发明名称 |
Rare earth element-iron-boron alloy and magnetically anisotropic permanent magnet powder and method for production thereof |
摘要 |
A method of making a magnetically anisotropic magnet powder according to the present invention includes the steps of preparing a master alloy by cooling a rare-earth-iron-boron based molten alloy and subjecting the master alloy to an HDDR process. The step of preparing the master alloy includes the step of forming a solidified alloy layer, including a plurality of R2Fe14B-type crystals (where R is at least one element selected from the group consisting of the rare-earth elements and yttrium) in which rare-earth-rich phases are dispersed, by cooling the molten alloy through contact with a cooling member.
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申请公布号 |
US7550047(B2) |
申请公布日期 |
2009.06.23 |
申请号 |
US20040496504 |
申请日期 |
2004.05.21 |
申请人 |
HITACHI METALS, LTD. |
发明人 |
TOMIZAWA HIROYUKI;KANEKO YUJI |
分类号 |
H01F1/057;C22C1/04;C22C38/00;C22C38/10;C22C38/14 |
主分类号 |
H01F1/057 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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