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Terbium base noncrystal alloy and its preparing method

An amorphous alloy, terbium-based technology, applied in the field of alloys, can solve the problems of rare earth-based amorphous alloy preparation and performance research, etc., and achieve the effects of simple preparation, good magnetostrictive performance, and good magnetic properties.

Inactive Publication Date: 2007-01-24
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, people are constantly looking for a new system of amorphous alloys with high glass-forming ability, but there are not many studies on the preparation and properties of rare earth-based amorphous alloys, especially heavy rare earth amorphous alloys.

Method used

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  • Terbium base noncrystal alloy and its preparing method
  • Terbium base noncrystal alloy and its preparing method
  • Terbium base noncrystal alloy and its preparing method

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1, Tb 56 co 20 al 24 Preparation of Bulk Amorphous Alloy

[0031] Use Tb, Co and Al with a purity of more than 99.9% and a molar ratio of 56:20:24 to prepare a terbium-based bulk amorphous alloy. Melt in the furnace, mix evenly, and obtain the master alloy ingot of Tb-Co-Al ternary alloy after cooling; then use the conventional metal mold casting method to remelt the ingot, and use the suction casting device in the electric arc furnace to The master alloy melt is sucked into the water-cooled copper mold, and the composition is Tb 56 co 20 al 24 The bulk amorphous alloy, whose morphology is as follows figure 1 As shown, the diameter is 3mm.

[0032] Such as figure 2 X-ray diffraction (XRD) shown demonstrates that the alloy is nearly completely amorphous. Such as image 3 The thermal analysis (DSC) diagram shown, its glass transition temperature (T g ), crystallization onset temperature (T x ), the width of the subcooling interval (ΔT=T x -T g ) are...

Embodiment 2～13

[0034] Various ratios of terbium-based bulk amorphous alloys were prepared according to the method of Example 1, and their compositions and thermophysical parameters are listed in Table 1.

[0035] Reality

[0036] Note: 1) The heating rate used in the measurement of each component sample in the table is 10K / min.

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Abstract

The present invention relates to a terbium base alloy, using terbium as main constituent. It is composed of TbaCobAlc or TbdCoeAlfYgMh; said M being transition group metallic element Sc, Nb, Ti, Cr, Mn, Fe, La, Pr, Ce or Nd..Every dimensionality of said terbium base bulk amorphous alloy dimension is not less than one mm, cut-off diameter not less than 3mm, having high glass forming ability, crystallization temperature at 650-700 k, glass transition temperature at 600-650 k,supercooling liquid field width at 25-75 k; having good magnetic characteristics and magnetostrictive property.

Description

technical field [0001] The invention relates to an alloy, in particular to a terbium-based amorphous alloy mainly composed of heavy rare earth element terbium, and a preparation method thereof. Background technique [0002] Typically, metals or alloys crystallize to form crystals when cooled from a liquid state. It has been found that certain metals or alloys cool at a sufficiently fast rate, for example 10 per second 4 ~10 6 In the order of K, it will maintain an extremely viscous state when it is solidified, thereby inhibiting crystallization and obtaining an amorphous metal or alloy. However, in order to obtain such a high cooling rate, the molten metal or alloy can only be sprayed onto a conductive substrate with very good thermal conductivity, and the size of the obtained amorphous metal or alloy is very small. For example, the molten alloy is sprayed onto a high-speed rotating copper roll to obtain a thin strip, or cast into a cold substrate to obtain flakes and pow...

Claims

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Application Information

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IPC IPC(8): C22C45/00
Inventor 王永田赵德乾潘明祥汪卫华
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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