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MnAlV permanent magnetic alloy and preparation method thereof

A permanent magnetic alloy and alloy technology, which is applied in the manufacture of inductors/transformers/magnets, magnetic materials, manufacturing tools, etc., can solve problems such as the decrease of the net magnetic moment of the unit cell, achieve simplification of the preparation process, promote industrial production, and excellent magnetic properties performance effect

Active Publication Date: 2019-02-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some of the redundant Mn atoms will occupy the structure of Al atoms in the unit cell, so that the Mn atoms occupying the Al position in the unit cell will form antiferromagnetic coupling with the Mn atoms in the adjacent unit cell due to the small distance, resulting in crystal The net magnetic moment in the cell drops

Method used

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  • MnAlV permanent magnetic alloy and preparation method thereof
  • MnAlV permanent magnetic alloy and preparation method thereof
  • MnAlV permanent magnetic alloy and preparation method thereof

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Embodiment 1

[0031] In the present embodiment, the composition chemical formula of MnAlV alloy is (Mn 0.55 al 0.45 ) 99.5 V 0.5 .

[0032] The preparation method of above-mentioned MnAlV alloy is as follows:

[0033] (1) Mn, Al, and V pure raw materials with a purity of 99.99% are compounded according to the atomic percentage of the alloy composition, and 8% (mass percentage) of Mn sheets are added in consideration of the volatilization of the Mn element.

[0034] (2) Place the raw materials weighed in step (1) in an electric arc melting furnace for smelting. When placing the raw materials, place Mn sheets and V particles at the bottom, and place Al particles on top. First evacuate to 5×10 -3 Below Pa, then fill in an appropriate amount of high-purity protective gas argon, and after igniting the arc, adjust the current slowly from small to large, and melt the Al particles first, so that the liquid Al can wrap Mn, thereby reducing the loss of Mn, and the alloy The ingot is smelted 5 t...

Embodiment 2

[0041] In the present embodiment, the compositional chemical formula of MnAlV alloy is (Mn 0.55 al 0.45 ) 99 V 1 .

[0042] The preparation method of above-mentioned MnAlV alloy is as follows:

[0043] (1) Mn, Al, and V pure raw materials with a purity of 99.99% are compounded according to the atomic percentage of the alloy composition, and 8% (mass percentage) of Mn sheets are added in consideration of the volatilization of the Mn element.

[0044](2) Place the raw materials weighed in step (1) in an electric arc melting furnace for smelting. When placing the raw materials, place Mn sheets and V particles at the bottom, and place Al particles on top. First evacuate to 5×10 -3 Below Pa, then fill in an appropriate amount of high-purity protective gas argon, and after igniting the arc, adjust the current slowly from small to large, and melt the Al particles first, so that the liquid Al can wrap Mn, thereby reducing the loss of Mn, and the alloy The ingot is smelted 6 time...

Embodiment 3

[0049] In the present embodiment, the composition chemical formula of MnAlV alloy is (Mn 0.55 al 0.45 ) 98.5 V 1.5 .

[0050] The preparation method of above-mentioned MnAlV alloy is as follows:

[0051] (1) Mn, Al, and V pure raw materials with a purity of 99.99% are compounded according to the atomic percentage of the alloy composition, and 8% (mass percentage) of Mn sheets are added in consideration of the volatilization of the Mn element.

[0052] (2) Place the raw materials weighed in step (1) in an electric arc melting furnace for smelting. When placing the raw materials, place Mn sheets and V particles at the bottom, and place Al particles on top. First evacuate to 5×10 -3 Below Pa, then fill in an appropriate amount of high-purity protective gas argon, and after igniting the arc, adjust the current slowly from small to large, and melt the Al particles first, so that the liquid Al can wrap Mn, thereby reducing the loss of Mn, and the alloy The ingot is smelted 5 t...

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Abstract

The invention relates to an MnAlV permanent magnetic alloy and a preparation method thereof. The chemical formula of the alloy components of the permanent magnetic alloy is (Mn0.55Al0.45)100-xVx, wherein each subscript x refers to the atom percentage content of a corresponding element (component), and x is greater than 0 but not greater than 3.0. The preparation method comprises the following steps of firstly preparing raw materials of a master alloy; then, crushing a master alloy ingot obtained after smelting, cleaning up surface impurities, and performing drying treatment to obtain broken bulk alloys; putting the broken bulk alloys in a quartz tube, and preparing an alloy strip by utilizing a melt spinning technology; and performing heat treatment on the alloy strip to obtain the MnAlV permanent magnetic alloy material. Compared with the prior art, the preparation method has the characteristic that a magnetic phase is stabilized by taking element doping control as a measure, and thebalance is sought between the magnetic performance and the price on the basis of completely not using a rare earth element, and the magnetic material having high performance is obtained through heat treatment.

Description

technical field [0001] The invention relates to permanent magnet materials in the field of functional materials, in particular to a MnAlV permanent magnet alloy and a preparation method thereof. Background technique [0002] Permanent magnet materials are widely used in magnetic levitation, medical equipment, electric vehicles, and motor systems for wind power generation. With the development of new energy and electric vehicles, the demand for high-performance permanent magnet materials is increasing. At present, the permanent magnet materials widely used mainly include ferrite and rare earth permanent magnets. Among them, 1 / 3 is Ba or Sr hexagonal ferrite, its maximum energy product is lower than 5MGOe, but the cost is relatively low, and the other 2 / 3 is based on rare earth permanent magnet materials including SmCo5, Sm2 (Fe, Cu, Zr, Co)17 (2:17) and Nd-Fe-B, etc., have high performance and high cost, and the magnetic product of Nd-Fe-B material has reached a theoretical...

Claims

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Application Information

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IPC IPC(8): B22D11/06C22C1/02C22C22/00C22F1/16C21D9/52H01F1/147H01F41/02
Inventor 陆伟向震邓柏闻熊娟王萧
Owner TONGJI UNIV