Method for producing rare-earth permanent magnet high in Ce content through one-step heat treatment technology
A technology of rare earth permanent magnets and rare earth permanent magnets, which is applied in the field of production of rare earth permanent magnets with high Ce content, can solve the problems of restricting the development and utilization of light rare earth elements, difficulty in obtaining commercial magnets, and destroying the core-shell structure, so as to alleviate the magnetic dilution effect , Protect from damage, improve the effect of magnet coercive force
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Embodiment 1
[0010] 1) It will be calculated in mass percentage, and the composition is (Pr, Nd) 15.25 Ce 15.25 Fe 67.11 Al 1.39 B 1 main phase A and
[0011] (Pr,Nd) 30.55 Fe 67.11 Al 1.39 B 1 The two main phase alloys of the main phase B are separately proportioned, and two kinds of flakes with a thickness of 0.3mm are obtained by using the quick-setting casting strip technology;
[0012] 2) Prepare the alloy powder with an average particle size of 3.1 μm by subjecting the two main phase flakes to hydrogen explosion and jet milling;
[0013] 3) In terms of mass percentage, after mixing 54wt.% of the main phase A alloy powder and 46wt.% of the main phase B alloy powder evenly, the magnetic powder was oriented and formed under a 2T magnetic field under the protection of nitrogen, and subjected to 17MPa cold isostatic pressed into a green body;
[0014] 4) Put the green body in a vacuum sintering furnace for sintering, the sintering temperature is 1040°C, the sintering time is 3h,...
Embodiment 2
[0017] 1) It will be calculated in mass percentage, and the composition is (Pr, Nd) 15.25 Ce 15.25 Fe 67.11 co 1.39 B 1 main phase A and
[0018] (Pr,Nd) 30.55 Fe67.11 co 1.39 B 1 The two main phase alloys of the main phase B are batched separately, and two types of flakes with a thickness of 0.3mm are obtained by using the quick-setting casting strip technology;
[0019] 2) The alloy powder with an average particle size of 3.3 μm was prepared by hydrogen explosion and jet milling processes of the two main phase flakes;
[0020] 3) In terms of mass percentage, after mixing 72wt.% of the main phase A alloy powder and 28wt.% of the main phase B alloy powder evenly, the magnetic powder is oriented and formed under a 2T magnetic field under the protection of nitrogen, and subjected to 17MPa cold isostatic pressed into a green body;
[0021] 4) Put the green body in a vacuum sintering furnace for sintering, the sintering temperature is 1040°C, the sintering time is 3h, and...
Embodiment 3
[0024] 1) It will be calculated in mass percentage, and the composition is (Pr, Nd) 15.25 Ce 15.25 Fe 67.11 Ga 1.39 B 1 Main Phase A and (Pr,Nd) 30.55 Fe 67.11 Ga 1.39 B 1 The two main phase alloys of the main phase B are batched separately, and two types of flakes with a thickness of 0.3mm are obtained by using the quick-setting casting strip technology;
[0025] 2) The alloy powder with an average particle size of 3.3 μm was prepared by hydrogen explosion and jet milling processes of the two main phase flakes;
[0026] 3) In terms of mass percentage, after mixing 90wt.% of the main phase A alloy powder and 10wt.% of the main phase B alloy powder evenly, under the protection of nitrogen, the magnetic powder is oriented and formed under a magnetic field of 2T, and subjected to 17MPa cold isostatic pressed into a green body;
[0027] 4) Put the green body in a vacuum sintering furnace for sintering, the sintering temperature is 1040°C, the sintering time is 2.5h, and t...
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