发明名称 |
IRON BASED RARE EARTH ALLOY MAGNET AND METHOD FOR MANUFACTURING THE SAME |
摘要 |
<P>PROBLEM TO BE SOLVED: To provide a permanent magnet with high coercivity and excellent rectangularity in demagnetization curve although containing less rare earth. <P>SOLUTION: The magnet has a composition which is described by a formula (Fe<SB>1-m</SB>T<SB>m</SB>)<SB>100-x-y-z</SB>Q<SB>x</SB>R<SB>y</SB>Ti<SB>z</SB>(wherein T denotes one or more elements selected from the group consisting of Co and Ni, Q denotes one or more elements selected from the group consisting of B and C, and R denotes one or more rare earth metals not substantially including La or Ce) and contains R<SB>2</SB>T<SB>14</SB>Q type compound crystal grains and a ferromagnetic iron based boride. The ferromagnetic iron based boride forms a film along the boundaries in between R<SB>2</SB>T<SB>14</SB>Q type compound crystal grains, and covers the grain surfaces. <P>COPYRIGHT: (C)2003,JPO |
申请公布号 |
JP2003224008(A) |
申请公布日期 |
2003.08.08 |
申请号 |
JP20020136134 |
申请日期 |
2002.05.10 |
申请人 |
SUMITOMO SPECIAL METALS CO LTD |
发明人 |
KANEKIYO HIROKAZU;MITSUGI TOSHIO;HIROZAWA SATORU |
分类号 |
C22C38/00;C22C38/10;H01F1/053;H01F1/08 |
主分类号 |
C22C38/00 |
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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