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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

Active Publication Date: 2012-08-29
GRIREM ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since there is no low melting point alloy component in the sintered body, the sintering temperature is high during the sintering process, and the density of the magnet is low, which affects the performance of the sintered composite magnet

Method used

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  • Sintered composite soft magnetic material and method for preparing same
  • Sintered composite soft magnetic material and method for preparing same
  • Sintered composite soft magnetic material and method for preparing same

Examples

Experimental program
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Effect test

no. 1 example

[0037] FeNi alloy powder, soft magnetic ferrite powder and low melting point soft magnetic alloy powder are mixed in a mass ratio of 4:5:1 (wherein the FeNi alloy composition is: Fe50wt%, Ni50wt%, the composition of MnZn ferrite is: 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. Put the mixed composite soft magnetic powder into a mould, press and form it on a compression molding machine, the pressure applied during the pressing process is 20 MPa, and the pressure holding time is 5 minutes. Put the pressed green body into a common atmosphere sintering furnace for sintering. The sintering temperature is 900°C, 1000°C, 1100°C, and 1200°C. The sintering time is 10 hours. The sintering atmosphere is a mixed gas of argon and oxygen, of which oxygen is The pressure is 0.1MPa. The operation process is as follows: first use a vacuum p...

no. 2 example

[0042] Mix Fe-Ni-Cu alloy powder, soft magnetic ferrite powder and low melting point soft magnetic alloy powder in a mass ratio of 12:7:1 (wherein the FeNiCu composition is: Fe50wt%, Ni45wt%, Cu5wt%, NiZn ferrite The composition of the body is: 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. Put the mixed composite soft magnetic powder into a mould, press and form it on a compression molding machine, the pressure applied during the pressing process is 40 MPa, and the holding time is 10 minutes. Put the pressed green body into a common atmosphere sintering furnace for sintering. The sintering temperature is 1200°C, 1300°C, 1400°C, and the sintering time is 1 hour at 1500°C. The sintering atmosphere is a mixed gas of argon and oxygen, of which oxygen is The pressure is 0.001MPa. The operation process is as follows: fi...

no. 3 example

[0046] Fe-Co alloy powder, soft magnetic ferrite powder and low melting point soft magnetic alloy powder are mixed in the ratio of mass ratio 8:1:1 (wherein FeCo composition is: Fe50wt%, Co50wt%, 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 is: the composition of the DyFeCo alloy is: Dy55wt%, Fe40wt%, Co5wt%), and then mixed and ball milled for 10 minutes. Put the mixed composite soft magnetic powder into a mould, press and form it on a compression molding machine, the pressure applied during the pressing process 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°C, 1100°C, 1200°C, and the sintering time is 3 hours at 1300°C. The sintering atmosphere is a mixed gas of argon and oxygen, of which oxygen is The pressure is 0.04MPa. The operation process is as follo...

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Abstract

The invention relates to a sintered composite soft magnetic material and a method for preparing the same. The material comprises a metal soft magnetic material, a soft magnetic ferrite and a low-melting-point soft magnetic alloy, wherein the metal soft magnetic material is formed by at least one of an Fe-Ni system, an Fe-Co system, an Fe-Co-V system, an Fe-Al system and an Fe-Al-Me system (Me is one or more than two of Co, Cr and Mo), the soft magnetic ferrite is formed by at least one of an Mn-Zn system, an Ni-Zn-based, an Li-Zn system and a Cu-Zn system, and the low-melting-point soft magnetic alloy is an Re-Fe-M system alloy (Re comprises one or more of 17 rare earth elements including Sc and Y, and M is one or more of metal elements including B, Al, Si, Ti, V, Cr, Mn, Co, Cu, Mo, Ni, Zn, Ga, Nb, Ta and W). The method for preparing the soft magnetic material formed by the components has the advantages that cold pressing and then sintering or hot pressing or spark plasma sintering are selected, and the soft magnetic material not only overcomes the low resistivity of the metal soft magnetic material and the low magnetic induction of the ferrite, but also maintains the excellent performance of the metal soft magnetic material and the soft magnetic ferrite.

Description

technical field [0001] The invention belongs to the field of magnetic materials, and relates to a composition and a preparation method of a sintered soft magnetic material composed of metal soft magnetic powder, soft magnetic ferrite and low melting point soft magnetic powder. Background technique [0002] The commonly used soft magnetic materials mainly include electrical pure iron, silicon steel sheets, iron-nickel alloys, ferrites, and amorphous and nanocrystalline materials. Electrical pure ferromagnetic properties and mechanical properties are excellent (high magnetic permeability, high saturation magnetic induction (-2T), mechanical strength), but the electrical properties are poor (low resistivity), and the eddy current loss is large under the alternating field, which cannot meet the requirements. Used under the condition of alternating electromagnetic field; silicon steel sheet has excellent magnetic and electrical properties (high saturation magnetization, high magn...

Claims

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Application Information

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IPC IPC(8): H01F1/33H01F1/14H01F1/36B22F3/16B22F3/105
Inventor 于敦波杨红川罗阳李红卫李世鹏彭海军李扩社袁永强张洪滨
Owner GRIREM ADVANCED MATERIALS CO LTD
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