RARE-EARTH METAL MAGNET AND METHOD OF ITS MANUFACTURING Russian patent published in 2019 - IPC H01F1/57 H01F1/53 H01F41/02 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to a rare earth metal magnet based on R-Fe-B, and a method for production thereof. Magnet from rare-earth metals contains the main phase and grain boundary phase located around the main phase, the total composition is expressed by formula: (Nd_x(Ce, La)_(1-x-y)R¹_y)_pFe_{(100-p-q-r-s)}Co_qB_rM¹_s⋅(R²_zR³_wM²_1-z-w)_t, where R¹ is one or more elements selected from rare earth elements other than Nd, Ce and La, R² is one or more elements selected from the series Pr, Nd, Pm, Sm, Eu and Gd, R³ is one or more elements selected from rare-earth elements other than R², M¹ and M² are a predetermined element, 5.0≤p≤20.0; 0≤q≤8.0; 4.0≤r≤6.5; 0≤s≤2.0; 0≤t≤10.0; 0.4≤x≤0.8; 0≤y≤0.1; 0.5≤z≤0.8 and 0≤w≤0.1; and La is contained in amount of 1/9 to 3 times in molar ratio to Ce.

EFFECT: invention makes it possible to create a magnet from rare-earth metals protected against reduction of coercive force even at high temperatures.

11 cl, 26 dwg, 3 tbl