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Ferromagnetic shape memory alloy with ultra high strength and its preparation method

An ultra-high-strength, memory alloy technology, applied in the field of metal alloys, can solve problems such as low restoring force, limiting the development of material engineering applications, and high brittleness of Ni-Mn-Ga bulk materials

Inactive Publication Date: 2012-11-21
DALIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type metal material called nickel (Ni) can be used for various applications such as batteries or fuel cells due its high tensile strength compared with traditional materials like copper.

Problems solved by technology

This patented technology describes an improved method for producing nickel-manganese-gallium (Ni—Mg) shape memory metal called nitrogen gas spring or simply nitroge). By controlling how much pressure on certain parts of the device changes when heated up, these shapes are able to transform into different forms depending upon their environment. They may find use in various applications like actuators and sensor devices due to their superior properties compared to other types of metals currently available at present time.

Method used

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  • Ferromagnetic shape memory alloy with ultra high strength and its preparation method
  • Ferromagnetic shape memory alloy with ultra high strength and its preparation method
  • Ferromagnetic shape memory alloy with ultra high strength and its preparation method

Examples

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Embodiment 1

[0022] According to the atomic percentage, take 52 parts of Ni, 29 parts of Mn, 15 parts of Ga and 4 parts of Cu and put them into a vacuum non-consumable electrode electric arc furnace, wherein the placement order from top to bottom is Ni, Ga, Mn, Cu, Ni; under argon protection, 100A smelting current, 8A magnetic stirring current, arc melting for 20min, suction casting into a rod-shaped sample of Φ10mm×75mm in the device at the bottom of the water-cooled copper crucible, and then mechanical polishing, with Clean the alloy rod body with acetone, and then put it into a vacuum of 10 -2 In the quartz tube of Pa, it is kept at 850°C for 24 hours, and then quenched into water; that is, high-strength Ni 52 mn 29 Ga 15 Cu 4 Ferromagnetic shape memory alloys.

[0023] The Ni prepared in this example 52 mn 29 Ga 15 Cu 4 Alloys and Existing Ni 50 mn 30 Ga 18 Cu 2 The alloy was tested for fracture strength and fracture strain, and the test results were as follows: figure 1 ...

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Abstract

The invention relates to a ferromagnetic shape memory alloy with ultra high strength. The alloy comprises the following chemical components expressed in atomic percent: 52 parts of Ni, 29 parts of Mn, 15 parts of Ga and 4 parts of Cu; the alloy has fracture strength of 3171 MPa and saturation magnetization of 51 emu/g; and the microstructure of the alloy is tetragonal structured non-modulated T martensite. The Ni52Mn29Ga15Cu4 alloy prepared in the invention has the characteristics of high fracture strength and great toughness.

Description

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Claims

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Application Information

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Owner DALIAN UNIV
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