Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Iron-based amorphous alloy having magnetothermal effect as well as application of iron-based amorphous alloy and method for regulating and controlling magnetic transition temperature of iron-based amorphous alloy

An iron-based amorphous alloy, magnetocaloric effect technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems of inability to prepare into blocks, high Curie temperature, poor amorphous formation ability, etc.

Inactive Publication Date: 2015-01-28
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
View PDF3 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, among the iron-based amorphous alloys that have been studied, Nanoperm amorphous alloy has the largest magnetocaloric effect, and its magnetic refrigeration capacity is significantly greater than that of Gd 5 Si 2 Ge 1.9 Fe 0.1 alloy, but its Curie temperature (i.e. working temperature) is high, and its amorphous formation ability is poor, so it cannot be prepared into a block (the magnetocaloric materials used in practice are sheet-like, spherical and wire-mesh bulk materials), Seriously affected its application as a magnetocaloric material

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
  • Iron-based amorphous alloy having magnetothermal effect as well as application of iron-based amorphous alloy and method for regulating and controlling magnetic transition temperature of iron-based amorphous alloy
  • Iron-based amorphous alloy having magnetothermal effect as well as application of iron-based amorphous alloy and method for regulating and controlling magnetic transition temperature of iron-based amorphous alloy
  • Iron-based amorphous alloy having magnetothermal effect as well as application of iron-based amorphous alloy and method for regulating and controlling magnetic transition temperature of iron-based amorphous alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] In the present embodiment, the molecular formula of the iron-based amorphous alloy is (Fe 0.71 T m 0.05 B 0.24 ) 96 Nb 4 .

[0048] Utilize the following method to prepare the diameter of this (Fe 0.71 T m 0.05 B 0.24 ) 96 Nb 4 Bulk amorphous alloy round rod:

[0049] (1) Pure metal Fe, B, Nb, Tm elements with a purity of more than 99% are calculated according to the molecular formula (Fe 0.71 T m 0.05 B 0.24 ) 96 Nb 4 The atomic percentage in the preparation of raw materials;

[0050] (2) the raw material prepared by step (1) is placed in the water-cooled copper crucible of the electric arc melting furnace, and first vacuumized to 10 -5 Pa, then fill it with argon gas until the pressure is 600mbar for smelting, and then continue smelting for 5 minutes after melting, then let the alloy cool with the copper crucible until it solidifies, turn it over quickly, and repeatedly smelt 3 to 5 times to obtain a mother with uniform composition. alloy ingot;

[00...

Embodiment 2

[0060] In the present embodiment, the molecular formula of the iron-based amorphous alloy is (Fe 0.71 Er 0.05 B 0.24 ) 96 Nb 4 .

[0061] The (Fe 0.71 Er 0.05 B 0.24 ) 96 Nb 4 Bulk amorphous alloy rods. The preparation method is basically the same as that in Example 1, except that Er is used as the rare earth element in step 1, and the diameter of the cylindrical copper mold in step 3 is 5.5 mm.

[0062] The X-ray diffraction pattern of the above-mentioned amorphous alloy bar made is as follows Figure 9 As shown, the rod has a broadened diffraction peak, indicating that the alloy rod is an amorphous structure.

[0063] The thermodynamic parameters of the amorphous alloy rods prepared above were measured by differential scanning calorimetry. Its DSC heating curve is as follows Figure 10 shown.

[0064] It has been determined that the relationship between the change of magnetic entropy and temperature of the bulk amorphous alloy under an applied magnetic field of...

Embodiment 3

[0066] In the present embodiment, the molecular formula of the iron-based amorphous alloy is (Fe 0.71 Tb 0.05 B 0.24 ) 96 Nb 4 .

[0067] (Fe 0.71 Tb 0.05 B 0.24 ) 96 Nb 4 Bulk amorphous alloy rods. The preparation method is basically the same as that in Example 1, except that Tb is selected as the rare earth element in the batching in step 1, and the diameter of the cylindrical copper mold in step 3 is 3.5 mm.

[0068] The X-ray diffraction pattern of the above-mentioned amorphous alloy bar made is as follows Figure 9 As shown, the rod has a broadened diffraction peak, indicating that the alloy rod is an amorphous structure.

[0069] The thermodynamic parameters of the amorphous alloy rods prepared above were measured by differential scanning calorimetry. Its DSC heating curve is as follows Figure 10 shown.

[0070] It has been determined that the relationship between the change of magnetic entropy and temperature of the bulk amorphous alloy under an applied mag...

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
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses an iron-based amorphous alloy having a magnetothermal effect. The iron-based amorphous alloy has a chemical formula of FeaREbBcNbd, wherein RE is one or more rare earth elements selected from Gd, Tb, Dy, Ho, Er and Tm; a, b, c and d are atomic percentages, a is equal to or greater than 50 and less than or equal to 75, b is greater than 0 and less than or equal to 30, c is equal to or greater than 20 and less than or equal to 25, d is equal to or greater than 3 and less than or equal to 5 and the sum of a, b, c and d is equal to 100. The iron-based amorphous alloy has good magnetothermal effect as well as high glass forming capability, is a good magnetothermal material and can be applied as a magnetic refrigerant. In addition, by regulating and controlling types of the rare earth elements in the amorphous alloy and content of the rare earth elements, the magnetic transition temperature of the iron-based amorphous alloy can be regulated and controlled and thus the magnetic transition region can be widened and the iron-based amorphous alloy has large magnetothermal effect in a wider temperature range.

Description

technical field [0001] The invention belongs to the technical field of iron-based amorphous alloys, and in particular relates to an iron-based amorphous alloy with magnetocaloric effect, its application and a method for regulating its magnetic transition temperature. Background technique [0002] Magnetic refrigeration technology based on the magnetocaloric effect has many advantages, such as high efficiency and energy saving, no environmental pollution, reliable operation, small size, light weight, low noise, etc., and can replace traditional gas compression refrigeration technology. [0003] In the past ten years, people have developed many magnetic refrigeration materials with excellent performance, which can be roughly divided into two categories: primary phase change materials and secondary phase change materials. First-order phase change materials usually have a large magnetocaloric effect, but also have severe thermal hysteresis. Although the magnetocaloric effect of...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/02H01F1/057
Inventor 黎嘉威常春涛霍军涛马浩然王新敏李润伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com