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Mn-Al-CNTs type alloy as well as preparation method and application method thereof

A mn-al-cnts, 1.mn-al-cnts technology, which is applied in the manufacture of inductors/transformers/magnets, electrical components, circuits, etc. The effect of machinability, coercivity improvement, and magnetic properties improvement

Inactive Publication Date: 2010-07-14
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fazakas et al. (E Fazakas, L K Varga, F Mazaleyrat.Preparation of nanocrystalline Mn-Al-C magnets by meltspinning and subsequent heat treatments[J].Journal of Alloys and Compounds, 434 / 435(2007)611) adopt melt fast Mn was prepared by quenching method 54 Al 44 C 2 Alloy thin strip, in which the quenching speed is 25m / s, but its magnetic properties are not very ideal: coercive force H c =141.7kA / m, maximum energy product (BH) max =12.0kJ / m 3

Method used

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  • Mn-Al-CNTs type alloy as well as preparation method and application method thereof
  • Mn-Al-CNTs type alloy as well as preparation method and application method thereof
  • Mn-Al-CNTs type alloy as well as preparation method and application method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0052] mn 50+x al 50-y (CNTs) y-x Mn in type alloy 51 al 46 (CNTs) 3 type alloy, wherein x=1, y=4, y-x=3, and the above CNTs are carbon nanotubes.

[0053] mn 51 al 46 (CNTs) 3 The preparation steps of type alloy are:

[0054] The first step, the configuration of raw materials

[0055] By atomic percentage Mn 51 al 46 (CNTs) 3 , Weigh the raw materials Mn, Al and CNTs, and add 7% Mn according to the mass percentage of Mn weighed according to the ratio of raw materials at the same time, to complete the configuration of raw materials. The purity of the three kinds of raw materials are all mass percentage ≥ 99.9%. The above CNTs are commercially available multi-walled carbon nanotubes prepared by chemical vapor deposition, with an inner diameter of 5-10 nm, an outer diameter of 25-70 nm, and a length of 5-60 microns;

[0056] The second step, melting and smelting of raw materials

[0057] Put the raw materials configured in the first step into the smelting furnace,...

Embodiment 2

[0073] mn 50+x al 50-y (CNTs) y-x Mn in type alloy 52 al 46 (CNTs) 2 type alloy, wherein x=2, y=4, y-x=2, and the above CNTs are carbon nanotubes.

[0074] mn 52 al 46 (CNTs) 2 The preparation steps of type alloy are:

[0075] The first step, the configuration of raw materials

[0076] Divided by atomic percentage Mn 52 al 46 (CNTs) 2 , except that raw materials Mn, Al and CNTs are weighed and more than 6% of the mass percentage of Mn taken by weighing Mn according to the ratio of raw materials is added during batching, other requirements are the same as in Example 1;

[0077] The second step, melting and smelting of raw materials

[0078] With embodiment 1;

[0079] The third step is to prepare Mn 52 al 46 (CNTs) 2 Master Alloy Ingot

[0080] Cool the homogeneous alloy smelted in the second step naturally to obtain Mn 52 al 46 (CNTs) 2 Master alloy ingot, ie Mn 52 al 46 (CNTs) 2 Die cast alloy.

[0081] Figure 8 Mn for this example 52 al 46 (CNTs) ...

Embodiment 3

[0092] Except Mn in embodiment 2 52 al 46 (CNTs) 2 In the application method of type alloy, Mn is obtained by melting 52 al 46 (CNTs) 2 The alloy melt is changed to carry out rapid quenching of the melt under the cooling copper roller rotating at a peripheral speed of 30m / s, and the rest are the same as in Example 2, thus obtaining Mn 52 al 46 (CNTs) 2 Type alloy 30m / s quick-quenching alloy strip magnet and corresponding annealed Mn 52 al 46 (CNTs) 2 type alloy thin strip magnets.

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Abstract

The invention discloses an Mn-Al-CNTs type alloy as well as a preparation method and an application method thereof, relating to a manganese-based alloy. The components of the Mn-Al-CNTs type alloy based on atomic percentage are as follows: Mn50+xAl50-y(CNTs)y-x, wherein the limited ranges of x and y are as follows: x is not less than 1 and not more than 3, y is not less than 4 and not more than 5, and y-x is not less than 1 and not more than 3; the preparation method of the Mn-Al-CNTs type alloy comprises the following steps of: preparing cast alloys after raw materials preparation, melting and smelting, and then preparing final Mn-Al-CNTs type alloy products after treatments of solution and annealing; and the application method of the Mn-Al-CNTs type alloy is as follows: preparing the Mn-Al-CNTs type cast alloy into an annealing Mn50+xAl50-y(CNTs)y-x type alloy thin strip magnet. The invention further improves the magnetization intensity and the coercive force of the Mn-Al type alloy so as to further improve the permanent magnetism performance and the machining property of the Mn-Al type alloy materials.

Description

technical field [0001] The technical solution of the invention relates to manganese-based alloys, specifically Mn-Al-CNTs type alloys and their preparation and application methods. Background technique [0002] Mn-Al alloy is a new type of permanent magnet material, which has the advantages of high specific strength, low density and good corrosion resistance, and has low price and good machinability. The good magnetic properties of Mn-Al alloys come from the metastable ferromagnetic τ phase. The τ phase is located in the high temperature ε phase (that is, the composition is Al 0.43 mn 0.47 Hexagonal close-packed phase) and room temperature Al 8 mn 5 ( 2 ) and β-Mn is a tetragonal structure phase, which is also the only ferromagnetic phase in Mn-Al alloys. Later, it was found that adding a small amount of C to the Mn-Al alloy can stabilize the ferromagnetic τ phase, and can improve the permanent magnetic properties and machining properties, so the Mn-Al-C permanent magn...

Claims

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Application Information

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IPC IPC(8): C22C49/04C22C49/14C22C47/08H01F41/02C22C101/10
Inventor 孙继兵田瑞婷崔春翔杨薇韩瑞平
Owner HEBEI UNIV OF TECH
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