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A kind of alloy material comnsi with giant magnetostrictive effect at room temperature and its preparation

A giant magnetostrictive and alloy material technology, applied in the material selection of magnetostrictive devices, device material selection, etc., can solve the problems of elastic energy loss, unfavorable processing and application, metal fragility, etc., and achieve no hysteresis Effect

Inactive Publication Date: 2017-03-01
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The elastic energy will be lost on the cracks in the process of transmission, resulting in the reduction of magnetostriction, and the metal full of cracks is brittle, which is not conducive to actual processing and application

Method used

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  • A kind of alloy material comnsi with giant magnetostrictive effect at room temperature and its preparation
  • A kind of alloy material comnsi with giant magnetostrictive effect at room temperature and its preparation
  • A kind of alloy material comnsi with giant magnetostrictive effect at room temperature and its preparation

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Effect test

Embodiment Construction

[0024] A kind of alloy material CoMnSi with room temperature magnetostrictive effect 1-x It can be composed of three elements: cobalt (Co), manganese (Mn) and silicon (Si), and the molecular formula is CoMnSi 1-x (x=0-0.02, such as 0; 0.01; 0.02).

[0025] Its preparation method is:

[0026] 1) According to the molecular formula of the alloy, the corresponding elements Co (59g), Mn (55g) and Si (27.44-28g are all acceptable) are precisely proportioned according to the molar ratio, and smelted into an alloy ingot.

[0027] 2) The alloy ingot is made into a small block with a size of about 0.5 cm, and the small block is vacuum-sealed in a quartz tube.

[0028] 3) Seal the sealed quartz tube into a larger-diameter quartz tube to form a double-layer tube.

[0029] 4) Burn the above-mentioned double-layer tube to 1250°C, then cool it to 850°C (degrees Celsius) under a 6T external field, and then remove the magnetic field to cool down naturally.

[0030] 5) The alloy obtained in...

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Abstract

An alloy material with room temperature giant magnetostriction effect, composed of three elements: cobalt (Co), manganese (Mn), and silicon (Si). The molecular formula is CoMnSi1‑x (x=0‑0.02). The sample is dense and has no cracks; it has a metamagnetic phase transition induced by a magnetic field; the prepared alloy has a <111> direction orientation texture parallel to the magnetic field; the metamagnetic phase transition near room temperature has no hysteresis; it has a huge magnetostrictive effect at room temperature , the absolute value is greater than 1000ppm. Through the above preparation method, the metamagnetic critical field of CoMnSi alloy is significantly reduced.

Description

technical field [0001] The invention relates to an alloy material CoMnSi with room temperature giant magnetostrictive effect 1-x (especially x=0-0.02) and preparation method thereof [0002] technical background [0003] Magnetostrictive materials have high application value and can be used as high-precision devices such as sensors and inductors. The most famous magnetostrictive material is Terfenol-D. (The magnetostriction of polycrystalline Terfenol-D at room temperature is about 1800 ppm.) However, Terfenol-D contains expensive rare earth elements, which increases its production cost and is not sustainable. Therefore, the research focus is on finding other inexpensive materials with magnetostrictive effects similar to Terfenol-D. The current study found that magnetic field-induced magnetic phase transitions may be accompanied by considerable magnetostrictive effects. In NiMn-based ferromagnetic shape memory alloys (NiMnIn, NiMnSn, NiMnSb), the magnetic field-induced ph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C19/07C22C30/00C22C1/02H01L41/20H10N35/85
Inventor 王敦辉龚元元
Owner NANJING UNIV