Aluminum rich bulk amorphous alloy and preparation method thereof

An amorphous alloy and bulk technology, applied in the field of alloys, can solve the problems of increased amorphous cost, poor aluminum-based amorphous formation ability, low aluminum content, etc., and achieves the effect of high strength and broad application prospects.

Inactive Publication Date: 2010-03-17
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the formation ability of aluminum-based amorphous is poor, and there is no millimeter-scale bulk amorphous
In the currently known amorphous systems, the content of aluminum is generally low (atomic ratio <25%), resulting in increased cost of the amorphous

Method used

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  • Aluminum rich bulk amorphous alloy and preparation method thereof
  • Aluminum rich bulk amorphous alloy and preparation method thereof
  • Aluminum rich bulk amorphous alloy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1, Al 40 La 35 Y 10 Ni 15 Preparation of Bulk Amorphous Alloy

[0037] Use Al, La, Y and Ni with a purity of more than 99.5% to prepare bulk amorphous alloys. First, after the four components are prepared in a molar ratio of 40:35:10:15, the argon adsorbed on titanium The ingot is repeatedly smelted in an electric arc furnace with an atmosphere, mixed evenly, and the master alloy ingot of Al-La-Y-Ni quaternary alloy is obtained after cooling; Re-melting, using the suction casting device in the electric arc furnace, sucking the master alloy melt into the water-cooled copper mold to obtain the aluminum-rich bulk amorphous alloy of the present invention, whose composition is Al 40 La 35 Y 10 Ni 15 , 1mm in diameter.

[0038] Such as figure 1 X-ray diffraction (XRD) shown proves that the alloy is completely amorphous. Such as figure 2 The thermal analysis (DSC) diagram shown, its glass transition temperature (T g ), crystallization onset temperature ...

Embodiment 2～29

[0040]Various ratios of aluminum-rich bulk amorphous alloys were prepared according to the method of Example 1, and their compositions and thermophysical parameters are listed in Table 1.

[0041] Table 1. Composition and thermophysical parameters of bulk amorphous alloys with high aluminum content

[0042] Reality

apply

example

alloy composition

T g

(K)

T x

(K)

T m

(K)

Tl

(K)

ΔTg

(K)

T rg

gamma

1

Al 40 La 35 Y 10 Ni 15

586

627

909

1092

41

0.536

0.374

2

Al 40 La 35 Y 10 Ni 10 co 5

579

619

763

1088

40

0.532

0.371

3

al 40 La 45 Ni 15

540

600

782

1097

60

0.492

0.367

4

Al 35 La 30 Ce 20 Ni 15

542

...

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Abstract

The invention relates to an aluminum rich bulk amorphous alloy which comprises Al[a]La[b]X[c]Ni[d]M[e], wherein X is cerium, yttrium, gadolinium or a combination thereof, M is cobalt or copper, a is larger than or equal to 35 but less than or equal to 40, b is larger than or equal to 30 but less than or equal to 55, c is larger than or equal to 0 but less than or equal to 20, d is larger than or equal to 5 but less than or equal to 15, e is larger than or equal to 0 but less than or equal to 10, and the sum of a, b, c, d and e is 100. The invention relates to another aluminum rich bulk amorphous alloy which comprises Al35Gd[f]Er[50-f]Co15, wherein f is larger than or equal to 0 but less than or equal to 22. The invention also relates to the preparation method of the aluminum rich bulk amorphous alloy, which comprises the following steps: preparing each metal ingredient according to the required ratio, smelting, cooling, cracking, remelting and suction-casting. The sizes of the aluminumrich bulk amorphous alloy provided by the invention are not less than 1mm in all dimensions, the aluminum rich bulk amorphous alloy has a high glass forming ability, the crystallization temperature is between about 590K and 680K, the glass transformation temperature is between 530K and 640K, and the width of a supercooled liquid phase region is between 35K and 70K.

Description

technical field [0001] The invention relates to an alloy, in particular to an aluminum-rich bulk amorphous alloy with aluminum (Al) and rare earth elements (lanthanum or gadolinium) as main components and an appropriate amount of other metal elements added. 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. [0003] 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 amorphous metal or alloy obtained in this way is very small. For example, the molten alloy is sprayed onto a high-speed rotating copper roll to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C45/00B22D18/06
Inventor 孙保安赵德乾潘明祥汪卫华
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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