High-iron-content samarium-cobalt permanent magnet material and preparation method

A technology of permanent magnet material and content, applied in the direction of magnetic material, inorganic material magnetism, magnetic object, etc., can solve the problem of poor squareness of samarium cobalt permanent magnet, and achieve the effect of improving magnetic field, reducing cost and high magnetic energy product

Active Publication Date: 2018-04-10
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the problem: overcomes the problem of poor squareness of the existing high-iron-content samarium-cobalt permanent magnet, and provides a high-i

Method used

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  • High-iron-content samarium-cobalt permanent magnet material and preparation method

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preparation example Construction

[0031] like figure 1 As shown, a method for preparing a high iron content samarium cobalt permanent magnet material of the present invention comprises the following steps:

[0032] The first step is to smelt the ingot

[0033] Configure the target composition alloy, put the target composition master alloy in the vacuum arc melting furnace and smelt until the alloy melt is in a uniform state, and the arc is broken to form an alloy ingot; turn the alloy ingot, and repeatedly smelt 3 to 5 times to prepare an alloy ingot with uniform composition.

[0034] Step 2: Milling

[0035] Sm to be prepared 1-p M p (Co 1-x-y-w Fe x Cu y Zr w ) z The alloy ingot is crushed by a pulverizer to a coarse powder that can pass through an 80-mesh sieve, and then a ball mill or jet mill is used to obtain Sm with a particle size of 3-5μm 1-p M p (Co 1-x-y-w Fe x Cu y Zr w ) z powder;

[0036] The third step, magnetic field forming and cold isostatic pressing

[0037] The dried powder ...

Embodiment 1

[0042] Example 1: Preparation of Sm 0.90 Pr 0.10 (Co 0.62 Fe 0.30 Cu 0.06 Zr 0.02 ) 7.7 Permanent magnet material, no third step sintering is added in the sintering process

[0043] The first step is to smelt the ingot

[0044] Configure the target component as Sm 0.90 Pr 0.10 (Co 0.62 Fe 0.30 Cu 0.06 Zr 0.02 ) 7.7 Alloy, put the target composition master alloy in a vacuum arc melting furnace until the alloy melt is in a uniform state, and the arc is broken to form an alloy ingot; turn the alloy ingot, and repeatedly smelt 3 to 5 times to prepare an alloy ingot with uniform composition.

[0045] The second step, milling

[0046] Sm to be prepared 0.90 Pr 0.10 (Co 0.62 Fe 0.30 Cu 0.06 Zr 0.02 ) 7.7 The alloy ingot is crushed by a pulverizer to a coarse powder that can pass through an 80-mesh sieve, and then a ball mill or jet mill is used to obtain Sm with a particle size of 3-5μm 0.90 Pr 0.10 (Co 0.62 Fe 0.30 Cu 0.06 Zr 0.02 ) 7.7 powder;

[0047] ...

Embodiment 2

[0057] Example 2: Preparation of Sm 0.90 Pr 0.10 (Co 0.62 Fe 0.30 Cu 0.06 Zr 0.02 ) 7.7 For permanent magnet materials, 1h is added to the third step of sintering in the sintering process.

[0058] The only difference between this example and Example 1 is that in the fourth step, the temperature is lowered to 1190°C for 1 hour after sintering in an argon atmosphere at 1210°C for 1 hour, and then solution aging treatment is performed under the same conditions. Get the target sample.

[0059] The magnetic properties of the samples were measured with a permanent magnet material measurement system NIM-500C. Its magnetic performance parameters are shown in Table 2.

[0060] Table 2. Example 2 Sample Sm 0.90 Pr 0.10 (Co 0.62 Fe 0.30 Cu 0.06 Zr 0.02 ) 7.7 Magnetic properties

[0061]

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Abstract

The invention provides a high iron content samarium cobalt permanent magnet material and preparation method. The expression of the high-iron-content samarium-cobalt permanent magnetic material is Sm1-pMp(Co1-x-y-wFexCuyZrw)z, where M is at least one of the selected elements Pr, La, Ce, Nd, Y, Dy, and Er, p=0.02 to 0.15, x=0.28 to 0.36, y=0.04 to 0.08, w=0.015 to 0.025, z=7.5 to 8.2, and z is an atomic ratio of a transition metal to a rare earth metal. The invention adopts a multi-step sintering process to improve the squareness of the high-iron-content Sm1-pMp (Co1-x-y-wFexCuyZrw) z permanentmagnet material, and solves the problem that the decrease of the squareness of the iron content leads to the decrease of the magnetic performance. The goal of increasing the maximum energy product byincreasing the Fe content has been achieved. The magnetic properties were as follows: remanence Br = 11.18-12.07 kGs, the maximum energy product (BH) max = 28 - 34 MGOe, the square degree Hk/Hcj = 0.311 - 0.504, and the coercive force Hcj = 21.32 - 26.94 kOe.

Description

technical field [0001] The invention relates to the technical field of magnetic materials, in particular to a samarium cobalt permanent magnet material with high iron content and a preparation method thereof, which improves the squareness of the samarium cobalt permanent magnet material with high iron content. Background technique [0002] As an important functional material, permanent magnet materials have been widely used in various important fields such as computer technology, micro-communication technology, automobile industry, aviation industry, automation technology, and instrument technology. The 2:17 type samarium cobalt permanent magnet material has high saturation magnetization, high coercivity, high Curie temperature and good corrosion resistance, making it the best choice for permanent magnet materials in many industries. As the demand for clean energy is becoming more and more urgent, the high-performance permanent magnets required in wind turbines have also rec...

Claims

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Application Information

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IPC IPC(8): H01F1/055H01F1/08C22C30/02C22C1/04
Inventor 蒋成保王文龙张天丽
Owner BEIHANG UNIV
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