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2:17 type oxidation-resistant samarium-cobalt high-temperature permanent-magnet material and preparation method thereof

A permanent magnet material and anti-oxidation technology, which is applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problem of weakening the diffusion of oxygen elements, achieve good high-temperature oxidation resistance, improve mechanical properties and high-temperature oxidation resistance.

Active Publication Date: 2013-07-03
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the internal oxidation of the existing 2:17 type samarium cobalt permanent magnet material under high temperature conditions, the present invention doped element Si by alloying method and doped SmCo in the process of ball milling. 2 Sn ultrafine powder, doped with Si element to promote supersaturated phase Th during high temperature sintering 2 Ni 17 (2:17H) formation, and improve the high temperature oxidation resistance of the magnet; and doped SmCo 2 Sn ultrafine powder achieves the purpose of liquid phase sintering with its low melting point, improving the density and mechanical properties of magnets, while SmCo 2 Sn ultrafine powder effectively weakens the diffusion of oxygen, thereby further improving the high temperature oxidation resistance of the magnet

Method used

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  • 2:17 type oxidation-resistant samarium-cobalt high-temperature permanent-magnet material and preparation method thereof
  • 2:17 type oxidation-resistant samarium-cobalt high-temperature permanent-magnet material and preparation method thereof
  • 2:17 type oxidation-resistant samarium-cobalt high-temperature permanent-magnet material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] Example 1: Sm(Co 0.70 Fe 0.09 Cu 0.09 Zr 0.034 Si 0.076 sn 0.01 ) 7.61 Permanent magnet material

[0090] Step 1: Making the first target component ingot

[0091] Weighing Sm, Co, Fe, Cu, Zr and Si elements to form the first target composition;

[0092] placing the first target component in a water-cooled copper crucible of a vacuum arc melting furnace;

[0093] Adjust the vacuum degree of the vacuum chamber to 3×10 -3 Pa, then fill high-purity (mass percent purity 99.999%) argon to make the vacuum of the vacuum chamber to 0.5 × 10 5 Pa;

[0094] After arc melting for 50s, the arc is broken to form the first alloy ingot;

[0095] Turn over the first alloy ingot, and after arc melting for 50s, break the arc to form the second alloy ingot;

[0096] Turn over the second alloy ingot, and after arc melting for 50s, break the arc to form the third alloy ingot; cool with the furnace, take it out, and make the SmCoFeCuZrSi alloy ingot;

[0097] Turn over the thir...

Embodiment 2

[0135] Example 2: Sm(Co 0.73 7Fe 0.05 Cu 0.05 Zr 0.033 Si 0.1 sn 0.03 ) 6.5 Permanent magnet material

[0136] Step 1: Making the first target component ingot

[0137] Weighing Sm, Co, Fe, Cu, Zr and Si elements to form the first target composition;

[0138] placing the first target component in a water-cooled copper crucible of a vacuum arc melting furnace;

[0139] Adjust the vacuum degree of the vacuum chamber to 4×10 -3 Pa, then fill high-purity (mass percentage purity 99.999%) argon to make the vacuum of the vacuum chamber to 0.6 * 10 5 Pa;

[0140] After arc melting for 70s, the arc is broken to form the first alloy ingot;

[0141] Flip the first alloy ingot, after arc melting for 60s, break the arc to form the second alloy ingot;

[0142] Turn over the second alloy ingot, and after arc melting for 50s, break the arc to form the third alloy ingot; cool with the furnace, take it out, and make the SmCoFeCuZrSi alloy ingot;

[0143] In the present invention, ...

Embodiment 3

[0181] Example 3: Sm(Co 0.79 Fe 0.07 Cu 0.07 Zr 0.03 Si 0.02 sn 0.02 ) 8.5 Permanent magnet material

[0182] Step 1: Making the first target component ingot

[0183] Weighing Sm, Co, Fe, Cu, Zr and Si elements to form the first target composition;

[0184] placing the first target component in a water-cooled copper crucible of a vacuum arc melting furnace;

[0185] Adjust the vacuum degree of the vacuum chamber to 5×10 -3 Pa, then fill high-purity (mass percent purity 99.999%) argon to make the vacuum of the vacuum chamber to 0.8 × 10 5 Pa;

[0186] After arc melting for 90s, the arc is broken to form the first alloy ingot;

[0187] Flip the first alloy ingot, after arc melting for 90s, break the arc to form the second alloy ingot;

[0188] Turn over the second alloy ingot, and after arc melting for 90s, break the arc to form the third alloy ingot; cool with the furnace, take it out, and make the SmCoFeCuZrSi alloy ingot;

[0189] In the present invention, the ...

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Abstract

The invention discloses a 2:17 type oxidation-resistant samarium-cobalt high-temperature permanent-magnet material and a preparation method thereof. The chemical formula of the permanent-magnet material is Sm(CoaFebCucZrdSieSnf)z, wherein a+b+c+d+e+f=1, the atom number of a is 0.35-0.92, the atom number of b is 0.02-0.32, the atom number of c is 0.02-0.16, the atom number of d is 0.01-0.04, the atom number of e is 0.02-0.1, the atom number of f is 0.01-0.03 and the atom number of z is 6.5-8.5. In the invention, element Si is doped by utilizing an alloying method and SmCo2Sn ultrafine powder is doped in a ball milling process, thereby improving the high-temperature oxidation resistance of the 2:17 type samarium-cobalt high-temperature permanent-magnet material. The Si element is doped, so that the formation of supersaturated phase Th2Ni17 in a high-temperature sintering process can be promoted and the high-temperature oxidation resistance of a magnet is improved; by virtue of low melting point, the doped SmCo2Sn ultrafine powder can be used for achieving the purpose of liquid-phase sintering and improving the density and mechanical property of the magnet; and at the same time, the SmCo2Sn ultrafine powder can be used for effectively reducing the diffusion of oxygen element, thereby further improving the high-temperature oxidation resistance of the magnet.

Description

technical field [0001] The invention relates to a 2:17 type samarium cobalt permanent magnet material, more particularly, a 2:17 type anti-oxidation samarium cobalt high temperature permanent magnet material and a preparation method thereof. Background technique [0002] Permanent magnet material is an important functional material. It can provide a continuous magnetic field and has the function of energy and information conversion. It has been widely used in computer technology, microwave communication technology, automobile industry, aviation industry, automation technology, instrument technology, etc. important areas. [0003] R 2 co 17 Due to the content ratio of 3d group Co atoms in the compound to RCo 5 More, with higher saturation magnetization and Curie temperature. R 2 co 17 Compounds have Th at low temperature 2 Zn 17 Rhomboidal structure. R 2 co 17 The compound structure can be considered by RCo 5 In the structure, 1 / 3 of the R atoms are replaced by Co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/07C22C1/04H01F1/055
Inventor 蒋成保刘丽丽张天丽刘敬华王敬民郑蕾
Owner BEIHANG UNIV
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