Cerium-rich rare earth permanent magnet using yttrium and preparation method thereof
A cerium-rich rare earth and permanent magnet technology, applied in magnetic objects, inductance/transformer/magnet manufacturing, magnetic materials, etc., can solve the problem of yttrium element can not be used, to suppress the magnetic dilution effect, protect rare earth resources, and realize the cost of raw materials Effect
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[0017] The preparation method of the cerium-rich rare earth permanent magnet using yttrium is as follows:
[0018] 1) According to the design of the main phase components, the ingredients are separately prepared, and the vacuum degree is higher than 10 -2 Different main phase alloys are smelted in a vacuum intermediate frequency induction furnace in Pa, and different main phase alloy flakes with a thickness of 0.2-0.5 mm are obtained by using the quick-setting casting strip technology, and then prepared by hydrogen explosion and jet milling processes with an average particle size of 3-4 μm. Corresponding main phase alloy powder;
[0019] 2) Uniformly mixing the corresponding main phase alloy powders according to the ratio to obtain mixed main phase powders with different Y-Ce substitution amounts;
[0020] 3) Orienting and pressing the mixed main phase powder under a magnetic field of 1.5-2T to obtain a green body;
[0021] 4) Vacuum-encapsulate the green body obtained, cold...
Embodiment 1
[0024] 1) In terms of mass percentage, the composition is [(Y 0.2 Ce 0.8 ) 0.5 Nd 0.5 ] 30.5 Fe 67.11 co 0.8 Zr 0.59 B 1 The main phase A and Nd 30.5 Fe 67.11 co 0.8 Zr 0.59 B 1 The main phase B is batched separately, and the vacuum degree is higher than 10 -2 After smelting in a vacuum intermediate frequency induction furnace in Pa, the corresponding main phase flakes with a thickness of 0.31mm are obtained by using the quick-setting casting belt technology;
[0025] 2) Prepare the corresponding alloy powder with an average particle size of 3.3 μm by subjecting the corresponding main phase flakes to hydrogen explosion and jet milling;
[0026] 3) After uniformly mixing the A and B main phase alloy powders according to the mass ratio of 3:7, under the protection of nitrogen, the mixed main phase powders are oriented and formed under a magnetic field of 2T, and are made into a green body by 17MPa cold isostatic pressing;
[0027] 4) Put the green body in a vacuum ...
Embodiment 2
[0037] 1) In terms of mass percentage, the composition is [(Y 0.25 Ce 0.75 ) 0.6 Nd 0.4 ] 30.2 Fe 67.45 co 0.8 Ga 0.55 B 1 The main phase A, the composition is [(Y 0.25 Ce 0.75 ) 0.4 Nd 0.6 ] 30.2 Fe 67.45 co 0.8 Ga 0.55 B 1 The main phase is B and the composition is Nd 30.2 Fe 67.45 co 0.8 Ga 0.55 B 1 The main phase C is batched separately, and the vacuum degree is higher than 10 -2 After smelting in Pa's vacuum intermediate frequency induction furnace, the corresponding main phase flakes with a thickness of 0.33mm are obtained by using the quick-setting casting belt technology;
[0038] 2) Prepare the corresponding alloy powder with an average particle size of 3.1 μm by subjecting the corresponding main phase flakes to hydrogen explosion and jet milling;
[0039] 3) After the main phase alloy powders of A, B and C are uniformly mixed according to the mass ratio of 2:2:1, the mixed main phase powder is oriented and formed under a magnetic field of 2T und...
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