Sintered composite soft magnetic material and method for preparing same
A technology of composite soft magnetic and soft magnetic materials, which is applied in the field of magnetic materials, can solve the problems of high sintering temperature, low magnet density, and affecting the performance of sintered composite magnets, so as to reduce the sintering temperature, improve the microstructure, improve the mechanical properties and The effect of soft magnetic properties
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[0036] The first embodiment:
[0037] Mix FeNi alloy powder, soft ferrite powder and low melting point soft magnetic alloy powder in a mass ratio of 4:5:1 (the FeNi alloy composition is: Fe50wt%, Ni50wt%, and the composition of MnZn ferrite: Mn 0.64 Zn 0.29 Fe 2.07 O 4 , The composition of the low melting point soft magnetic alloy is: the composition of the NdFe alloy is: Nd60wt%, Fe40%), and then mixed and ball milled for 30 minutes. The mixed composite soft magnetic powder is put into a mold, and it is press-formed on a compression molding machine. During the pressing process, the applied pressure is 20 MPa, and the pressure holding time is 5 minutes. Put the pressed green body into a common atmosphere sintering furnace for sintering and molding. The sintering temperature is 900℃, 1000℃, 1100℃, and 1200℃. The sintering time is 10 hours. The sintering atmosphere is a mixed gas of argon and oxygen. The pressure is 0.1 MPa. The operation process is as follows: first use a vacuum ...
Example
[0041] The second embodiment:
[0042] Mix Fe-Ni-Cu alloy powder, soft ferrite powder and low melting point soft magnetic alloy powder in a mass ratio of 12:7:1 (the FeNiCu composition is: Fe50wt%, Ni45wt%, Cu5wt%, NiZn ferrite Body composition: No 0.5 Zn 0.5 Fe 2.04 O 4 , The composition of the low melting point soft magnetic alloy is: the composition of the NdFeCu alloy is: Nd55wt%, Fe40wt%, Cu5wt%), and then mixed and ball milled for 30 minutes. The mixed composite soft magnetic powder is put into a mold, and it is press-formed on a compression molding machine. During the pressing process, the applied pressure is 40 MPa, and the pressure holding time is 10 minutes. Put the pressed green body into a common atmosphere sintering furnace for sintering. The sintering temperature is 1200℃, 1300℃, 1400℃, and 1500℃. The sintering time is 1 hour. The sintering atmosphere is a mixed gas of argon and oxygen. The pressure is 0.001 MPa. The operation process is as follows: first use a va...
Example
[0045] The third embodiment:
[0046] Mix Fe-Co alloy powder, soft ferrite powder and low melting point soft magnetic alloy powder in a mass ratio of 8:1:1 (the FeCo composition is: Fe50wt%, Co50wt%, and the composition of NiZnCu ferrite is: Ni 0.4 Zn 0.5 Cu 0.1 Fe 2.04 O 4 , The composition of the low melting point soft magnetic alloy: DyFeCo alloy composition: Dy55wt%, Fe40wt%, Co5wt%), and then mixed ball milling for 10 minutes. The mixed composite soft magnetic powder is put into a mold, and it is press-formed on a compression molding machine. The pressure applied during the pressing is 10 MPa, and the pressure holding time is 30 minutes. Put the pressed green body into a common atmosphere sintering furnace for sintering. The sintering temperature is 1000℃, 1100℃, 1200℃, and 1300℃. The sintering time is 3 hours. The sintering atmosphere is a mixed gas of argon and oxygen. The pressure is 0.04MPa. The operation process is as follows: first use a vacuum pump to vacuum the fur...
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