Method and application for preparing magnetic Sm2Co17/Al-Ni-Co composite through spark plasma sintering

A discharge plasma and composite material technology, applied in the field of composite material preparation, can solve the problems of restricting industrialization development, complex sintering process, inclusion and fouling, etc., and achieves the effect of solving poor magnetic properties, simple process and stable structure.

Inactive Publication Date: 2018-11-02
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects existing in the prior art, such as: the traditional powder sintering process of Al-Ni-Co permanent magnet is complex, the cycle is long, and defects are prone to occur, such as pores, deformation, inclusions and dirt, and low density. Poor magnetic properties, while Sm 2 (CoFeCuZr) 17 Type alloy contains a large amount of rare resource Sm and strategic reserve resource Co in its alloy, has limited its industrialization development etc. greatly, the invention provides a kind of spark plasma sintering preparation magnetic Sm 2 co 17 / Al-Ni-Co Composite Method

Method used

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  • Method and application for preparing magnetic Sm2Co17/Al-Ni-Co composite through spark plasma sintering
  • Method and application for preparing magnetic Sm2Co17/Al-Ni-Co composite through spark plasma sintering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Milling:

[0028] The aluminum powder used in the experiment is 99.85% pure powder with an average particle size of 10 μm; general-purpose cobalt powder with an average particle size of 2 μm; nickel powder with an average particle size of 2 μm; industrial production 2:17 type Sm-Co permanent magnet material (Sm 2 co 17 Magnetic powder), the average particle size after powder making is about 5 μm;

[0029] (2) Ball milling:

[0030] Weigh 18gSm 2 co 17 Magnetic powder, 18g aluminum powder, 18g cobalt powder, 18g nickel powder, mix the above powders, add ethanol, make the ethanol cover the above mixed powder, wet mill in planetary ball mill for 12h, put the powder after ball milling into a vacuum oven for drying dry to obtain mixed powder;

[0031] (3) Compression molding:

[0032] The mixed powder after drying is compressed by cold isostatic pressing, pressurized at 90MPa, and kept under pressure for 5min to obtain a compact composite billet;

[0033] (4) Spar...

Embodiment 2

[0038] (1) Milling:

[0039] The aluminum powder used in the experiment is 99.85% pure powder with an average particle size of 10 μm; general-purpose cobalt powder with an average particle size of 2 μm; nickel powder with an average particle size of 2 μm; industrial production 2:17 type Sm-Co permanent magnet material (Sm 2 co 17 Magnetic powder), the average particle size after powder making is about 5 μm;

[0040] (2) Ball milling:

[0041] Weigh 25gSm 2 co 17Magnetic powder, 15g aluminum powder, 15g cobalt powder, 15g nickel powder, mix the above powders, add ethanol, make the ethanol cover the above mixed powder, wet mill in a planetary ball mill for 10h, put the ball milled powder into a vacuum drying oven and dry dry to obtain mixed powder;

[0042] (3) Compression molding:

[0043] The dried mixed powder is compressed by cold isostatic pressing, pressurized at 100MPa, and kept under pressure for 2min to obtain a dense composite billet;

[0044] (4) Spark plasma s...

Embodiment 3

[0049] (1) Milling:

[0050] The aluminum powder used in the experiment is 99.85% pure powder with an average particle size of 10 μm; general-purpose cobalt powder with an average particle size of 2 μm; nickel powder with an average particle size of 2 μm; industrial production 2:17 type Sm-Co permanent magnet material (Sm 2 co 17 Magnetic powder), the average particle size after powder making is about 5 μm;

[0051] (2) Ball milling:

[0052] Weigh 36gSm 2 co 17 Magnetic powder, 12g aluminum powder, 12g cobalt powder, 12g nickel powder, mix the above powders, add ethanol, make the ethanol cover the above mixed powder, wet grind in planetary ball mill for 11h, put the ball milled powder into vacuum drying oven and dry dry to obtain mixed powder;

[0053] (3) Compression molding:

[0054] The mixed powder after drying is compressed by cold isostatic pressing, pressurized at 95MPa, and kept under pressure for 3min to obtain a compact composite billet;

[0055] (4) Spark pl...

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Abstract

The invention belongs to the technical field of composite preparation, in particular to a method and application for preparing a magnetic Sm2Co17 / Al-Ni-Co composite through spark plasma sintering. Themethod for preparing the magnetic Sm2Co17 / Al-Ni-Co composite through spark plasma sintering specifically comprises the steps of mixing Sm2Co17 magnetic powder with aluminum powder, cobalt powder andnickel powder evenly, adding ethyl alcohol, conducting wet grinding in a ball grinding machine and conducting vacuum drying to obtain mixed powder; pressing and molding the mixed powder through cold isostatic pressing; putting an obtained composite billet into a graphite mold to conduct vacuum sintering in a spark plasma sintering furnace and cooling the composite billet to the indoor temperatureto obtain a Sm2Co17 / Al-Ni-Co composite after completion of sintering; and conducting magnetizing on the composite to obtain the magnetic Sm2Co17 / Al-Ni-Co composite. The magnetic Sm2Co17 / Al-Ni-Co composite obtained through the method has higher magnetism and better permanent magnetic effect. The composite is uniform and stable in structure has higher tensile strength and yield strength. The methodhas the advantages that the preparation process is simple, the controllability is high, sintering is fast and the sintering temperature is low and can be applied to production.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, in particular to the preparation of magnetic Sm by spark plasma sintering. 2 co 17 / Al-Ni-Co composites methods and applications. Background technique [0002] The preparation of magnetic composite materials is mostly prepared by smelting method and powder sintering method. The smelting method has disadvantages such as complicated procedures, long time consumption, high heating temperature, and difficult control of the reaction. Magnetic materials manufactured by powder metallurgy are an important part of the field of magnetic materials. In recent years, powder metallurgy magnetic materials have developed rapidly, especially the Nd-Fe-B permanent magnet materials known as the king of permanent magnets. Only the powder metallurgy process In order to give full play to its excellent performance. However, the traditional powder metallurgy method has a long sintering time and...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/04B22F3/105B22F3/24C22C30/00C22C1/04H01F1/057H01F41/02
CPCH01F1/0577H01F41/0266C22C30/00B22F3/04B22F3/105B22F3/24B22F2999/00B22F2998/10B22F2009/043B22F1/10C22C1/047B22F2201/20B22F2202/05Y02P10/25
Inventor 李桂荣张德王宏明解萌蕾
Owner JIANGSU UNIV
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