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Oxidation-resistant SmCoX-Y(SiaGebSnc)Y high-temperature permanent-magnet material for aeroengine and preparation method thereof

A technology of aero-engines and permanent magnet materials, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of inability to store to room temperature, sample magnetic performance attenuation, etc., achieve good high-temperature oxidation resistance, and improve high-temperature oxidation resistance effect of ability

Active Publication Date: 2012-01-04
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since TbCu 7 SmCo 7 The alloy is a high-temperature metastable phase, which will decompose into SmCo at higher temperatures 5 and Sm 2 co 17 Two phases, the phase cannot be preserved to room temperature during the equilibrium solidification process; at the same time, when the SmCo alloy is applied to a high temperature of 500 ° C, the Sm element will be oxidized inside the alloy to form Sm 2 o 3 , leading to changes in the microstructure of the alloy, resulting in a gradual decline in the magnetic properties of the sample

Method used

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  • Oxidation-resistant SmCoX-Y(SiaGebSnc)Y high-temperature permanent-magnet material for aeroengine and preparation method thereof
  • Oxidation-resistant SmCoX-Y(SiaGebSnc)Y high-temperature permanent-magnet material for aeroengine and preparation method thereof
  • Oxidation-resistant SmCoX-Y(SiaGebSnc)Y high-temperature permanent-magnet material for aeroengine and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Example 1 Antioxidant SmCo 6.1 (Si 0.98 Ge 0.01 sn 0.01 ) 0.9 High temperature permanent magnet material

[0063] Step 1: Quaternary Alloy Preparation

[0064] Weigh Sm, Co, Si and Ge to configure the target composition;

[0065] Place the target components in a water-cooled copper crucible in a vacuum arc melting furnace;

[0066] 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;

[0067] After arc melting for 50s, the arc is broken to form the first alloy ingot;

[0068] Turn over the first alloy ingot, and after arc melting for 50s, break the arc to form the second alloy ingot;

[0069] 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 SmCoSiGe quaternary alloy ingot;

[0070] In the present invention, the mass percent p...

Embodiment 2

[0091] Example 2 Antioxidant SmCo 8.1 (Si 0.7 Ge 0.2 sn 0.1 ) 0.5 High temperature permanent magnet material

[0092] Step 1: Quaternary Alloy Preparation

[0093] Weigh Sm, Co, Si and Ge to configure the target composition;

[0094] Place the target components in a water-cooled copper crucible in a vacuum arc melting furnace;

[0095] Adjust the vacuum degree of the vacuum chamber to 4×10 -3 Pa, then fill high-purity (mass percent purity 99.999%) argon to make the vacuum of the vacuum chamber to 0.7 × 10 5 Pa;

[0096] After arc melting for 70s, the arc is broken to form the first alloy ingot;

[0097] Flip the first alloy ingot, after arc melting for 60s, break the arc to form the second alloy ingot;

[0098] 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 SmCoSiGe quaternary alloy ingot;

[0099] Turn over the third alloy ingot, and after arc melting f...

Embodiment 3

[0119] Example 3 Antioxidant SmCo 5.1 (Si 0.2 Ge 0.7 sn 0.1 ) 1.9 High temperature permanent magnet material

[0120] Step 1: Quaternary Alloy Preparation

[0121] Weigh Sm, Co, Si and Ge to configure the target composition;

[0122] Place the target components in a water-cooled copper crucible in a vacuum arc melting furnace;

[0123] 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;

[0124] After arc melting for 40s, the arc is broken to form the first alloy ingot;

[0125] Flip the first alloy ingot, after arc melting for 60s, break the arc to form the second alloy ingot;

[0126] 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 SmCoSiGe quaternary alloy ingot;

[0127] In the present invention, the mass percent purity of Sm ...

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Abstract

The invention discloses an oxidation-resistant SmCoX-Y(SiaGebSnc)Y high-temperature permanent-magnet material for an aeroengine and a preparation method thereof. The expression formula of the permanent-magnet material is SmCoX-Y(SiaGebSnc)Y, wherein the atom number of X is 5.0-8.5 and the atom number of Y is 0.01-1.90; and a+b+c=1, the atom number of a is 0.20-0.98, the atom number of b is 0.01-0.70 and the atom number of c is 0.01-0.10. In the invention, Si, Ge and Si elements are doped in SmCo7 alloy, and the ratio of three elements (Si, Ge and Sn) is properly adjusted to achieve the purposes of simultaneously stabilizing the structure of TbCu7 and improving the high-temperature oxidation resistant capacity of a magnet. The Si element is doped, so that the formation of a TbCu7 phase canbe promoted and the high-temperature oxidation resistance of the material can be improved; the Ge element is doped, so that the growth of crystal grains in the sintering process can be inhibited; andthe Sn element is doped, so that the sintering temperature can be reduced, the sintering efficiency can be improved and the mechanical performance of the material can be enhanced at the same time.

Description

technical field [0001] The present invention relates to a kind of 1:7 type samarium cobalt permanent magnet material used as aeroengine, more particularly, refers to a kind of anti-oxidation SmCo used for processing aeroengine permanent magnet magnetic bearing X-Y (Si a Ge b sn c ) Y High temperature permanent magnet material and its preparation method. Background technique [0002] Aeroengines are characterized by small size, high power, and harsh working conditions for each component. Especially when the rotating parts work under different temperatures, loads, and environmental media (air, gas), most of them must be used with high specific strength and good heat resistance. Made of materials with strong corrosion resistance. [0003] Permanent magnet material is an important functional material, which can provide a continuous magnetic field, has the function of energy and information conversion, and is the main material for processing magnetic bearings. [0004] 1:7 ...

Claims

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Application Information

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IPC IPC(8): C22C19/07C22C1/04H01F1/055
Inventor 蒋成保刘丽丽张天丽
Owner BEIHANG UNIV
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