发明名称 |
A METHOD FOR PRODUCING A RARE EARTH METAL-IRON-BORON ANISOTROPIC SINTERED MAGNET FROM RAPIDLY-QUENCHED RARE EARTH METAL-IRON-BORON ALLOY RIBBON-LIKE FLAKES |
摘要 |
In a method for producing a rare earth metal-iron-boron (R-Fe-B) anisotropic sintered magnet from R-Fe-B alloy ribbon-like flakes, each flake is formed with a thickness of about 20-500 mu m and contains R2Fe14B crystal grains dispersed in the flake with an average grain size of 10 mu m or less. The flakes are ground into a powder having an average particle size less than the thickness value of the flake. The powder is magnetically aligned and compacted into a compact body which is then sintered. Thus, the anisotropic sintered magnet is obtained with a high energy product and a high anti-corrosion property. The ribbon-like flakes are prepared by the continuous splat-quenching method. Alternatively, the flakes can be prepared by spraying the molten R-Fe-B alloy in a form of particles and cooling the particles on a cooling plate into flat small pieces. |
申请公布号 |
WO8804098(A1) |
申请公布日期 |
1988.06.02 |
申请号 |
WO1987JP00917 |
申请日期 |
1987.11.26 |
申请人 |
TOKIN CORPORATION |
发明人 |
SATO, TADAKUNI;TACHIYA, YUICHI |
分类号 |
B22D11/06;B22F9/10;H01F1/057;(IPC1-7):H01F1/04;H01F1/08 |
主分类号 |
B22D11/06 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|