Sm-Al-Co system Sm base ternary block amorphous alloy

A kind of amorphous alloy, 1.sm-al-co technology, applied in the field of Sm-Al-Co bulk amorphous alloy, can solve the problem of easy oxidation burning and volatilization, difficult composition control, and easy deviation of alloy composition from amorphous composition and other problems, to achieve the effect of simple alloy components

Inactive Publication Date: 2009-11-18
DALIAN UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this five-element alloy are: ①The multi-component optimization of the components is complicated, which makes it difficult to improve the performance of the alloy through component optimization on the basis of this composition, and the cost of the alloy is also increased due to the large number of components; ②In order to determine the bulk non- The composition of crystal alloys needs a lot of tests, which inevitably has a certain degree of subjectivity and arbitrariness; ③Since Sm, a rare earth metal, is easy to oxidize, burn and volatilize during smelting, the alloy composition is easy to deviate from the amorphous composition, and the composition control Difficulties, these make the development of Sm-based bulk amorphous alloys quite difficult

Method used

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  • Sm-Al-Co system Sm base ternary block amorphous alloy
  • Sm-Al-Co system Sm base ternary block amorphous alloy

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment one, Sm 50 al 25 co 25 Preparation of Bulk Amorphous Alloy and Its Properties Test

[0036] The first step, the weighing of the composition ratio

[0037] According to the atomic percentage in the design composition, it is converted into a weight percentage wt.%, and the pure metal Sm, Al, and Co raw materials with a purity of 99.9% are weighed in proportion for use; 2% more Sm has been added in advance for weighing. Compensation for volatilization during alloy melting;

[0038] The second step, Sm 50 al 25 co 25 Melting of ternary alloy ingot

[0039] The mixture of Al, Co and rare earth metal Sm is placed in a water-cooled copper crucible of a non-consumable arc melting furnace, and melted under the protection of argon. First, the vacuum is evacuated to 10 -2 Pa, then filled with argon until the pressure is 0.06MPa, the melting current density range is 140A / cm 2 , after melting, continue to smelt for 10 seconds, turn off the power, let the alloy co...

Embodiment 2

[0046] Embodiment 2, Sm 58 al 21 co 21 Preparation of Bulk Amorphous Alloy and Its Properties Test

[0047] The first step, the weighing of the composition ratio

[0048] According to the atomic percentage in the design composition, it is converted into a weight percentage wt.%, and the pure metal Sm, Al, and Co raw materials with a purity of 99.9% are weighed in proportion for use; 2% more Sm has been added in advance for weighing. compensate for its volatilization;

[0049] The second step, Sm 58 al 21 co 21 Melting of ternary alloy ingot

[0050] The smelting method of alloy ingot adopts the method for the second step in the embodiment one to carry out; Vacuumizing is 10 -2 Pa, filled with argon gas pressure is 0.08MPa, the current density used for melting is 120A / cm 2 , repeated smelting 3 times to obtain a ternary alloy ingot with uniform composition;

[0051] The third step, Sm 58 al 21 co 21 Composition inspection of ternary alloy ingot

[0052] The inspec...

Embodiment 3

[0059] Embodiment three, Sm 54 al 19.8 co 26.2 Bulk amorphous alloy preparation

[0060] The first step, the weighing of the composition ratio

[0061] According to the atomic percentage in the design composition, it is converted into a weight percentage wt.%, and the pure metal Sm, Al, and Co raw materials with a purity of 99.9% are weighed in proportion for use; 2% more Sm has been added in advance for weighing. compensate for its volatilization;

[0062] The second step, Sm 54 al 19.8 co 26.2 Melting of ternary alloy ingot

[0063] The smelting method of alloy ingot adopts the method for the second step in the embodiment one to carry out; Vacuumizing is 10 -2 Pa, filled with argon gas pressure is 0.07MPa, the current density used for melting is 130A / cm 2 , repeated smelting 3 times to obtain a ternary alloy ingot with uniform composition;

[0064] The third step, Sm 54 al 19.8 co 26.2 Composition inspection of ternary alloy ingot

[0065] The inspection method o...

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Abstract

Sm-Al-Co system Sm-based ternary bulk amorphous alloy in the field of new materials, features: its composition range is Smx(Al50-yCo50+y)100-x(x=50~58 at.%, y= -10~+7at.%); the best amorphous forming composition is Sm50Al25Co25; the method of preparing the above alloy is: batching, non-consumable arc melting of alloy ingot, inspection and compensation of volatilization of rare earth Sm, bulk amorphous Negative pressure suction casting of the copper mold of the alloy, wherein the argon pressure used is 0.06-0.08MPa, the current density range is 120-140A / cm2, and the pressure difference of the negative pressure suction casting is 0.04±0.005MPa to obtain a bulk amorphous alloy with a diameter of 3mm. The advantages are: to overcome the shortcomings of complex optimization of Sm-based bulk amorphous components and random composition selection, a new Sm-Al-Co system Sm-based ternary bulk amorphous alloy system has been developed, and the most optimal alloy system has been determined. It is beneficial to the development of Sm-based bulk amorphous alloys with more than quaternary elements on the basis of this ternary composition; the method of checking and supplementing the volatilization of Sm reduces the composition deviation.

Description

technical field [0001] The invention relates to a series of Sm-Al-Co bulk amorphous alloys with strong amorphous forming ability, belonging to the field of new materials. Background technique [0002] Amorphous metal alloys are a class of metals or alloys with short-range order and long-range disorder structures, and they have high comprehensive mechanical properties and unique physical and chemical properties. However, due to the influence of metal or alloy amorphous forming ability (that is, the ability to form amorphous alloy), the preparation of such materials requires a higher cooling rate, and the general critical cooling rate is 10 5 K / s. In the order of cooling speed from high to low, commonly used quenching technologies include: melt atomization, thin film deposition technology, and copper roller quenching strip machine technology. The material form is often low-dimensional materials such as powder, thin strip, etc., and its application range are therefore greatly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C45/00C22C1/02
Inventor 董闯吴江王清羌建兵王英敏
Owner DALIAN UNIV OF TECH
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