A kind of highly plastic magnetostrictive material and preparation method thereof

A technology of magnetostrictive material and high plasticity, applied in the direction of material selection for magnetostrictive devices, device material selection, etc., can solve the problems that the mechanical properties of single crystal materials need to be further improved, the preparation process is complicated, etc., and achieve good production. High rate, simple and convenient process, small saturation magnetic field effect

Active Publication Date: 2019-02-19
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this material is relatively complicated, and the mechanical properties of single crystal materials need to be further improved

Method used

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  • A kind of highly plastic magnetostrictive material and preparation method thereof
  • A kind of highly plastic magnetostrictive material and preparation method thereof
  • A kind of highly plastic magnetostrictive material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1 prepares Fe 83 Ga 17 Tb 0.05 High plastic magnetostrictive material

[0046] The preparation formula is Fe 83 Ga 17 Tb 0.05 The steps of highly plastic magnetostrictive material are as follows:

[0047] 1. Ingredients

[0048] The purity of the selected raw materials Fe, Ga and Tb (RE raw materials) is greater than 99.99wt%, and in order to prevent the elements from burning during the smelting process, when the Fe, Ga and Tb raw materials are prepared according to the above composition, the burning loss of about 2wt% Add Ga and Tb respectively. Specifically, 26.5 g of Fe, 6.91 g of Ga, and 0.049 g of Tb were weighed and set aside. Weigh 27.72g of Fe, 7.158g of Ga and 0.048g of Tb for subsequent use.

[0049] 2. Preparation of master alloy ingot

[0050] Put the above-mentioned raw materials Fe, Ga and Tb into the crucible of the vacuum non-consumable arc melting furnace. When placing, put the metal elements that are easy to burn at the bottom of t...

Embodiment 2

[0065] Embodiment 2 prepares Fe 81 Ga 19 PR 0.2 High plastic magnetostrictive material

[0066] In addition to the batching step, take 27.8g of Fe, 8.31g of Ga and 0.088g of Pr for subsequent use; in the step of preparing high plastic magnetostrictive material, the furnace body is heated to 1650 ° C, and the temperature gradient is controlled to be 5 × 10 5 K / m, except that the growth rate is 3000mm / h, other steps are the same as in Example 1, and the obtained composition is Fe 81 Ga 19 PR 0.2High plastic magnetostrictive material (size Φ7mm×20mm).

[0067] Adopt embodiment 1 method to the Fe of above-mentioned preparation 81 Ga 19 PR 0.2 High plastic magnetostrictive materials were tested; the results showed that: the Fe 81 Ga 19 PR 0.2 The highly plastic magnetostrictive material is polycrystalline material with orientation, and the orientation degree of crystal direction is 96%. The precipitated phases are arranged vertically along the grain growth direction. ...

Embodiment 3

[0069] Embodiment 3 prepares Fe 76.5 Ga 23.5 Dy 0.1 High plastic magnetostrictive material

[0070] In addition to the batching step, weigh 26.2g of Fe, 10.25g of Ga and 0.1g of Dy for later use; in the step of preparing high plastic magnetostrictive material, the furnace body is heated to 1625 ° C, and the temperature gradient is controlled to be 3 × 10 5 K / m, except that the growth rate is 1000mm / h, other steps are the same as in Example 1, and the obtained composition is Fe 76.5 Ga 23.5 Dy 0.1 High plastic magnetostrictive material (size Φ7mm×20mm).

[0071] Adopt embodiment 1 method to the Fe of above-mentioned preparation 76.5 Ga 23.5 Dy 0.1 High plastic magnetostrictive materials were tested; the results showed that: the Fe 76.5 Ga 23.5 Dy 0.1 The highly plastic magnetostrictive material is a polycrystalline material with orientation, and the orientation degree of crystal direction is 98%. The precipitated phases are arranged vertically along the grain grow...

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Abstract

The invention provides a highly plastic magnetostrictive material and a preparation method thereof. The chemical formula of the highly plastic magnetostrictive material of the present invention is Fe 100‑x Ga x RE y , wherein 16.9≤x≤20.6 or 22.5≤x≤28.5, 0.01≤y≤1, RE is selected from one or more of Tb, Dy, Ho, Nd, Pr and Ce. After the Fe, Ga and RE raw materials prepared according to the composition requirements are melted into master alloy ingots, the master alloy ingots are melted, and master alloy rods are made by vacuum suction casting, and then the master alloy rods are placed in a heat preservation In the crucible of the sleeve, heat the master alloy rod to completely melt, draw the molten material into the cooling liquid for directional solidification, and obtain the high-plasticity magnetostrictive material. The highly plastic magnetostrictive material of the invention has excellent magnetostrictive properties and mechanical properties.

Description

technical field [0001] The invention relates to a magnetic material, in particular to a highly plastic magnetostrictive material and a preparation method thereof. Background technique [0002] Magnetostrictive materials are an important class of intelligent functional materials. Such materials can produce intrinsic deformation under the drive of a magnetic field. This dimensional change is called "magnetostriction". Since the British physicist Joule first observed magnetostriction in pure Fe in 1842, the development of magnetostrictive materials has gone through a long process from simple metals such as Fe and Ni to ferrite alloys and rare earth intermetallic compounds. development path. At present, magnetostrictive materials represented by Tb-Dy-Fe (Terfenol-D) alloy and Fe-Ga (Galfenol) alloy have become the mainstream of intelligent functional materials. Industrial fields such as safety monitoring play an irreplaceable role. [0003] Table 1 shows the main technical pa...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/00C22C33/06H01L41/20
CPCC22C33/06C22C38/002C22C38/004C01P2002/72H10N35/85
Inventor 蒋成保吴煜烨孟崇峥王敬民张天丽刘敬华徐惠彬
Owner BEIHANG UNIV
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