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Aluminum-based amorphous/high-entropy alloy composite and preparation method thereof

A high-entropy alloy and composite material technology, applied in the field of aluminum-based amorphous/high-entropy alloy composite materials and preparation, can solve the problems of high compressive strength, low composite material strength, and low composite material density, and achieve compressive strength. High, improve the relative density, the effect of high relative density

Active Publication Date: 2015-12-16
北京中辰至刚科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the strength of the composite material is low due to the enhancement of the deformability of the aluminum-based amorphous composite material by adding second phase particles, one of the purposes of the present invention is to provide an aluminum-based amorphous / high-entropy alloy composite material, the density of which is Low, high compressive strength, and has a certain deformation ability

Method used

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  • Aluminum-based amorphous/high-entropy alloy composite and preparation method thereof
  • Aluminum-based amorphous/high-entropy alloy composite and preparation method thereof
  • Aluminum-based amorphous/high-entropy alloy composite and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] (1) Put Al, Cu and Ti metal powders with a purity of ≥99.5% and a particle size of ≤50 μm into a ball mill jar at an atomic percentage of 65:16.5:18.5, with a ball-to-material ratio of 10:1, in a glove box with an Ar atmosphere Inject 6ml of toluene into the ball mill jar, and seal the jar; take out the ball mill jar from the glove box and put it into a ball mill, and ball mill it at a speed of 800r / min for 25h to obtain an aluminum-based amorphous powder;

[0039] (2) Al, Co, Cr, Fe and Ni metal blocks with a purity ≥ 99.9% are made into raw materials in a molar ratio of 0.4:1.6:1.0:1.0:1.0, and the vacuum degree is 2.5×10 -3 Under Pa, use argon as a protective gas, and smelt under stirring for 15 minutes to obtain an alloy liquid; cool the alloy liquid to obtain an alloy ingot; turn over the obtained alloy ingot, and repeat the smelting 4 times to obtain AlCoCrFeNi high-entropy Alloy master alloy ingot; put the prepared master alloy ingot into a vacuum metal atomizati...

Embodiment 2

[0045] (1) Put Al, Fe and Ti metal powders with a purity of ≥99.5% and a particle size of ≤50 μm into a ball mill jar at an atomic percentage of 70:25:5, with a ball-to-material ratio of 15:1, in a glove box with an Ar atmosphere Inject 10ml of toluene into the ball mill jar, and seal the jar; take out the ball mill jar from the glove box and put it into a ball mill, and ball mill it at a speed of 600r / min for 35h to obtain an aluminum-based amorphous powder;

[0046] (2) Al, Co, Cr, Fe and Ni metal blocks with a purity of ≥99.9% are made into raw materials in a molar ratio of 0.4:1.6:1.0:1.0:1.0, and the vacuum degree is 1.0×10 -4 Under Pa, use argon as a protective gas, and smelt under stirring for 10 minutes to obtain an alloy liquid; cool the alloy liquid to obtain an alloy ingot; turn the obtained alloy ingot over and repeat the smelting 4 times to obtain AlCoCrFeNi high-entropy Alloy master alloy ingot; put the prepared master alloy ingot into a vacuum metal atomization ...

Embodiment 3

[0052] (1) Put Al, Ni and Ti metal powders with a purity of ≥99.5% and a particle size of ≤50 μm into a ball mill jar at an atomic percentage of 88:6:6, with a ball-to-material ratio of 20:1, in a glove box with an Ar atmosphere Inject 7ml of toluene into the ball mill jar, and seal the jar; take out the ball mill jar from the glove box and put it into a ball mill, and ball mill it at a speed of 800r / min for 30h to obtain an aluminum-based amorphous powder;

[0053] (2) Al, Co, Cr, Fe and Ni metal blocks with a purity of ≥99.9% are made into raw materials in a molar ratio of 0.6:1.4:1.0:1.0:1.0, and the vacuum degree is 5.0×10 -4 Under Pa, use argon as a protective gas, and smelt under stirring for 10 minutes to obtain an alloy liquid; cool the alloy liquid to obtain an alloy ingot; turn the obtained alloy ingot over and repeat the smelting 4 times to obtain AlCoCrFeNi high-entropy The master alloy ingot of the alloy; the prepared master alloy ingot is put into a vacuum metal ...

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Abstract

The invention relates to an aluminum-based amorphous / high-entropy alloy composite and a preparation method thereof, belonging to the field of metal composites. The composite is relatively low in density and high in compressive strength and has certain deformability. The preparation method comprises the steps of placing metal powder of Al, Cu and Ti or Al, Fe and Ti or Al, Ni and Ti into a ball milling tank, injecting methylbenzene from a glove box with an Ar atmosphere to the ball milling tank, taking all the components out of the glove box after sealing the tank, and carrying out ball milling to obtain aluminum-based amorphous powder; preparing an original material from Al, Co, Cr, Fe and Ni metal blocks, and carrying out alloy smelting in vacuum by taking Ar as a protective gas to obtain a mother alloy ingot of AlCoCrFeNi high-entropy alloy; atomizing the obtained mother alloy ingot, and screening to obtain spherical high-entropy alloy powder with the particle size of 20-100mu m; and after carrying out ball milling and mixing on the obtained aluminum-based amorphous powder and the high-entropy alloy powder, placing the mixture into a hard alloy die to sinter to obtain the aluminum-based amorphous / high-entropy alloy composite.

Description

technical field [0001] The invention relates to an aluminum-based amorphous / high-entropy alloy composite material and a preparation method thereof, belonging to the field of metal composite materials. Background technique [0002] Due to the characteristics of low density and high strength, aluminum-based amorphous alloys have attracted great attention from the majority of scientific researchers. Studies have shown that the tensile strength of amorphous alloys containing 84 to 86 atomic percent of aluminum can reach more than 1000 MPa, which is 2 to 4 times that of traditional aluminum alloys (about 600 MPa). [0003] When a small amount of α-Al nanoparticles are diffusely distributed in the aluminum-based amorphous matrix, its strength is as high as 1560MPa, which is 1.5 times the strength of single-phase amorphous alloys. Alloy strength and ductility. The aluminum-based amorphous alloy reinforced by nanocrystalline phase can reach or exceed the strength of steel, but its...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C21/00B22F3/105
Inventor 薛云飞谈震曹堂清王鲁张鹏
Owner 北京中辰至刚科技有限公司
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