Rare earth permanent magnet produced by applying abundant rare earth cerium (Ce) and preparation method thereof
A rare earth permanent magnet, high abundance technology, used in magnetic objects, inductor/transformer/magnet manufacturing, magnetic materials, etc., to achieve cost control, high magnetic performance and corrosion resistance, and improve grain boundary phase distribution.
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[0022] The steps of the preparation method of the rare earth permanent magnet produced by using high-abundance rare earth Ce are as follows:
[0023] 1) The main phase alloy powder was prepared by quick-setting flake ingot, hydrogen explosion and jet milling;
[0024]2) The grain boundary complementary alloy powder is prepared by coarse crushing and mechanical ball milling after vacuum intermediate frequency induction melting;
[0025] 3) The nano-powder and the grain boundary complementary alloy powder are uniformly mixed to perform nano-modification, and the mass fraction of the added nano-powder is 0.001~10% to obtain the nano-modified grain boundary complementary alloy powder;
[0026] 4) The main phase alloy powder and the nano-modified grain boundary complementary alloy powder are uniformly mixed and then subjected to magnetic field orientation pressing to obtain a green body. Among them, the nano-modified grain boundary complementary alloy powder accounts for 3% of the ...
Embodiment 1
[0030] 1) The main phase alloy powder is prepared by rapid-setting flake ingot, hydrogen explosion and jet milling process. The main phase alloy is calculated in atomic percentage, and its composition is (Nd 0.9 Ce 0.1 ) 12 Fe 82 B 6 ;
[0031] 2) The grain boundary complementary alloy powder is prepared by coarse crushing and mechanical ball milling after vacuum intermediate frequency induction melting. The grain boundary complementary alloy is calculated in atomic percentage, and its composition is Ce 72 Cu 28 ;
[0032] 3) The nano-powder and the grain boundary complementary alloy powder are uniformly mixed to perform nano-modification, and the added nano-dy 2 O 3 The powder mass fraction is 3%, and the nano-modified grain boundary complementary alloy powder is obtained;
[0033] 4) The main phase alloy powder and the nano-modified grain boundary complementary alloy powder are uniformly mixed and then subjected to magnetic field orientation pressing to obtain a gree...
Embodiment 2
[0037] 1) The main phase alloy powder is prepared by adopting the fast-setting flake ingot, hydrogen explosion and jet milling process, and the main phase alloy is calculated in atomic percentage, and its composition is (Nd 0.6 Ce 0.4 ) 15 Fe 78.4 Ga 0.5 Al 0.5 Co 0.1 B 5.5 ;
[0038] 2) Coarse crushing and mechanical ball milling after vacuum intermediate frequency induction melting to prepare grain boundary complementary alloy powder. The grain boundary complementary alloy is calculated in atomic percentage and its composition is Nd 70 Cu 30 ;
[0039] 3) The nano powder and the grain boundary complementary alloy powder are uniformly mixed to perform nano modification, and the mass fraction of the added nano Cu powder is 0.05% to obtain the nano modified grain boundary complementary alloy powder;
[0040] 4) The main phase alloy powder and the nano-modified grain boundary complementary alloy powder are uniformly mixed and then subjected to magnetic field orientation...
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