Rare earth iron base soft magnetic metallic glass having very large super cooling region

An iron-based metal, soft magnetic metal technology, applied in magnetic materials, magnetic objects, electrical components, etc., can solve the problems of environmental pollution, high cost, high price of metallic glass, etc., and achieve the effect of reducing cost and high thermal stability

Inactive Publication Date: 2003-09-17
UNIV OF SCI & TECH BEIJING
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention proposes iron-based rare earth soft magnetic metallic glass (FeCoNi) 1-x-y-z-tTmyTnzLntBx material, which solves the proble

Method used

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  • Rare earth iron base soft magnetic metallic glass having very large super cooling region
  • Rare earth iron base soft magnetic metallic glass having very large super cooling region
  • Rare earth iron base soft magnetic metallic glass having very large super cooling region

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Embodiment Construction

[0021] In Ar gas, the pure metal and F-B alloy mixed according to the composition ratio are heated and melted by electric arc furnace or intermediate frequency induction furnace, and the (Fe 1-a Da) 1-x-y-z-t TMyTnzLntBx alloy. (FeCo) 71.5-x (Tb, Dy) 3 Cu 0.2 Nb x B 25 alloy. Then, the ingot was dissolved in the quartz crucible, and sprayed to the high-speed rotating copper plate through the 0.2 mm opening at the bottom of the crucible to obtain a completely amorphous thin strip. The thermal analyzer (DSC) obtained was used to measure the glass transition temperature and other parameters, and the structural analysis was carried out with a high-current and high-sensitivity X-ray diffractometer, etc., and the magnetic strength of the vibrating sample with a maximum external field of 670kA / m The magnetization curve was measured with a VSM at room temperature to obtain the saturation magnetization. In addition, the molten alloy is directly poured from the crucible into a c...

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Abstract

A soft magnetic metal glass which consists of differential value for glass transforming temperature Tg and crystallization temperature Tx as over cooling section deltaTx=Tx-Tg, 50k to 110k rare earthiron-base metal glass has the composition of (Fel-aDa)-x-y-z-tTmyTnzLntBx, where element D is 1-2 kinds of Co and Ni, element Tm is 1-2 kinds of Nb, Mo, W, Zr, Cr, Ti, V, element Tn refers to one of Al, Cu, Si, C, Ln is 1-3 kinds of rare rarth element and the atomic ratios x,y,z,t and a are 21<x<35, 0.8<t<4.5, 0.1<2<2, 0.5<y<6 and 0íœaíœ13. The product of soft magnetic metal glass with the thickness below 4 mm can be made by the abrupt quenching process.

Description

technical field [0001] The invention relates to a ferromagnetic amorphous alloy, in particular to a soft magnetic metallic glass with a super-large supercooling interval. Background technique [0002] General traditional amorphous soft magnetic materials, such as (Fe, Co, Ni)-P-B, (Fe, Co, Ni)-Si-B, (Fe, Co, Ni)-M (Zr, Nb, Hf) and other soft Magnetic amorphous materials have been widely used in power transformers, inductors, magnetic heads, and sensors because of their low coercive force, low magnetostriction coefficient, and high magnetic permeability. However, it takes up to 10 to form these amorphous 5 With a cooling rate of K / s, only thin strips and wires with a thickness of less than 100цm can be obtained, which limits their application; these traditional soft magnetic amorphous materials still have thermal stability problems because of the small supercooling range. It is easy to crystallize when it rises, and the magnetic properties are greatly reduced after crystall...

Claims

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Application Information

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IPC IPC(8): H01F1/153
Inventor 龙毅万发荣李春和
Owner UNIV OF SCI & TECH BEIJING
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