High-performance macroscopic foam-state Fe73Ga27 magnetostrictive material and preparation process thereof

A magnetostrictive material, fe73ga27 technology, applied in the direction of material selection for magnetostrictive devices, device material selection, etc., can solve the problem of alloy magnetostrictive strain increase, alloy energy density increase, limit magnetostrictive performance, etc. problem, to achieve the effect of high magnetostrictive coefficient, high yield and excellent magnetostrictive performance

Inactive Publication Date: 2015-07-15
ZHEJIANG UNIV +1
View PDF6 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, people have done a lot of research work on Fe-Ga magnetostrictive materials theoretically and experimentally, but the mechanism of the large magnetostriction of Fe-Ga alloys is still unclear, which limits the further development of magnetostrictive properties. improve
[0004] The ...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-performance macroscopic foam-state Fe73Ga27 magnetostrictive material and preparation process thereof
  • High-performance macroscopic foam-state Fe73Ga27 magnetostrictive material and preparation process thereof
  • High-performance macroscopic foam-state Fe73Ga27 magnetostrictive material and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: Preparation of foamed Fe with a porosity of 33.65% 73 Ga 27 alloy

[0039] Use an electronic balance to take the raw materials required for the design composition, and add 3wt% more Ga burning loss, with a total weight of 40g, of which 99.99% purity Fe and 99.99% Ga are used, and the prepared raw materials are placed in a vacuum for non-consumption Arc melting furnace.

[0040] Vacuumize the vacuum non-consumable arc melting furnace to 5*10 -3 Pa, flushed into the furnace with 10kPa argon gas, and then vacuumed to 3*10 -3 Pa; the volume percent purity of argon is 99.99%.

[0041] Then fill it with argon to melt to a vacuum degree of 50kPa, and melt the ingredients at a melting current of 100A~150A. The melting time is 5 minutes, and the melting is repeated 5 times to obtain an alloy ingot.

[0042] The purpose of smelting 5 times is to ensure the uniformity of the composition of the alloy ingot.

[0043] Process the alloy ingot into a 6mm*6mm*10mm cub...

Embodiment 2

[0051] Example 2: Preparation of foamed Fe with a porosity of 47.88% 73 Ga 27 alloy

[0052] Use an electronic balance to take the raw materials required for the design composition, and add 3wt% more Ga burning loss, with a total weight of 40g, of which 99.99% purity Fe and 99.99% Ga are used, and the prepared raw materials are placed in a vacuum for non-consumption Arc melting furnace.

[0053] Vacuumize the vacuum non-consumable arc melting furnace to 5*10 -3 Pa, flushed into the furnace with 10kPa argon gas, and then vacuumed to 3*10 -3 Pa; the volume percent purity of argon is 99.99%.

[0054] Then fill it with argon to melt to a vacuum degree of 50kPa, and melt the ingredients at a melting current of 100A~150A. The melting time is 5 minutes, and the melting is repeated 5 times to obtain an alloy ingot.

[0055] The purpose of smelting 5 times is to ensure the uniformity of the composition of the alloy ingot.

[0056] Process the alloy ingot into a 6mm*6mm*10mm cub...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
Magnetostriction coefficientaaaaaaaaaa
Magnetostriction coefficientaaaaaaaaaa
Login to view more

Abstract

The invention discloses a high-performance macroscopic foam-state Fe73Ga27 magnetostrictive material and a preparation process thereof. Holes are introduced into an Fe73Ga27 alloy by preparing a porous sodium metaaluminate precursor so as to ensure that the magnetostrictive performance of the Fe73Ga27 alloy can be improved; the pore size is 20-100 microns, and the porosity is 30-50%; and the preparation process comprises the following step: performing spray casting in a copper mold by using a vacuum spray casting furnace. According to the high-performance macroscopic foam-state Fe73Ga27 magnetostrictive material and the preparation process thereof disclosed by the invention, the hindering effect of magnetic domain rotation in Fe73Ga27 can be reduced based on introduced pores, the macroscopic foam-state Fe73Ga27 magnetostrictive material can be developed, and large magnetic-induced strain, low driving fields and relatively high mechanical performance can be achieved; and a foam material prepared by using a method disclosed by the invention is uniform in pore, ensures that the magnetostrictive coefficient exceeds 300ppm, also is simple and convenient in process and high in finished product rate, and is beneficial to popularization and application.

Description

technical field [0001] The invention belongs to the field of magnetostrictive materials, and relates to a high-performance macroscopic foam Fe 73 Ga 27 Magnetostrictive material and its preparation process. Background technique [0002] Fe-Ga is a solid solution material formed by Ga atoms and Fe atoms. Its saturation magnetostriction coefficient (single crystal material λs~400 ppm) is more than ten times that of traditional iron-based and nickel-based magnetostrictive materials, and it drives The magnetic field is very low (~100 Oe), only 1 / 10 of that of terb-dysprosium-iron giant magnetostrictive materials. Compared with traditional rare-earth giant magnetostrictive materials, iron-gallium alloys also have good mechanical properties and magnetostrictive temperature stability (the tensile strength is as high as 500 MPa, which is about 23 times that of terbium-dysprosium-iron alloys; the Curie temperature ~ 675°C, which is 300°C higher than that of terbium-dysprosium-iron...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C22C38/00C22C33/00H01L41/20
Inventor 胡姗姗马天宇刘孝莲周向志
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap