发明名称 |
MAGNETICALLY ANISOTROPIC R-T-B MAGNET |
摘要 |
A magnetically anisotropic R-T-B magnet having crystal grains having aspect ratios of 2 or more and showing a substantially uniform maximum energy product distribution is produced by (a) rapidly quenching an alloy melt; (b) finely pulverizing the rapidly quenched alloy to provide magnetic powder; (c) mixing the magnetic powder with a carbon-containing additive; (d) coating the resulting mixture with a protective layer of a first lubricant such as BN substantially unreactive with the alloy components; (e) compressing it; (f) further coating the resulting compressed body with a second lubricant such as graphite or graphite+glass; and (g) further compressing it.
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申请公布号 |
US5162063(A) |
申请公布日期 |
1992.11.10 |
申请号 |
US19900612379 |
申请日期 |
1990.11.14 |
申请人 |
HITACHI METALS LTD. |
发明人 |
SHINODA, MAKOTO;IWASAKI, KATSUNORI;TANIGAWA, SHIGEHO;TOKUNAGA, MASAAKI |
分类号 |
B22F3/00;B22F3/02;B22F3/14;B22F3/17;C22C19/00;C22C33/02;C22C38/00;H01F1/053;H01F1/057 |
主分类号 |
B22F3/00 |
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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