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Low-density and high-entropy alloy material and preparation method thereof

A high-entropy alloy and low-density technology, applied in the field of high-entropy alloys, can solve the problems of unreported bulk materials of low-density high-entropy alloys, and achieve the effects of good promotion and application prospects, simple and stable process, and reliable process.

Active Publication Date: 2016-09-07
GUANGDONG XINGFA ALUMINUM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the above two processes, there are currently no reports on other preparation and forming processes and technologies for low-density high-entropy alloy bulk materials.

Method used

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  • Low-density and high-entropy alloy material and preparation method thereof
  • Low-density and high-entropy alloy material and preparation method thereof
  • Low-density and high-entropy alloy material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Step 1: Design of low-density high-entropy alloy

[0044] AlSiCuNiTiCr series high-entropy alloy is designed, the specific composition of the selected high-entropy alloy is AlSiCuNiTiCr, and its theoretical density is 5.76g / cm 3 , according to the molar atomic ratio and mass fraction of the main elements in the high-entropy alloy AlSiCuNiTiCr, the mass of each component is calculated as pure Al powder 60.84g, pure Si powder 63.32g, pure Cu powder 143.30g, pure Ni powder 132.34g, Pure Ti powder 107.96g, pure Cr powder 117.24g and weigh the corresponding mass with an electronic balance, and then mix the powder on a V-type powder mixer for 15 hours until uniform.

[0045] Step 2: Mechanical alloying to prepare low-density high-entropy alloy AlSiCuNiTiCr powder

[0046] Put the uniformly mixed powder in step 1 into a stainless steel ball mill tank, vacuumize and fill it with argon as a protective atmosphere, and perform mechanical alloying on a planetary ball mill, where t...

Embodiment 2

[0051] Step 1: Design of low-density high-entropy alloy

[0052] AlSiTiVCr series high-entropy alloy is designed, the specific composition of the selected high-entropy alloy is AlSiTiVCr, and its theoretical density is 4.52g / cm 3 , according to the molar atomic ratio and mass fraction of the main elements in the high-entropy alloy AlSiTiVCr, the mass of each component is calculated as pure Al powder 81.91g, pure Si powder 85.25g, pure Ti powder 145.35g, pure V powder 154.64g, Pure Cr powder is 157.85g, and the corresponding mass is weighed with an electronic balance, and then the powder is mixed on a V-type powder mixer for 24 hours until uniform.

[0053] Step 2: Preparation of low-density high-entropy alloy powder by mechanical alloying

[0054] Put the uniformly mixed powder in step 1 into a stainless steel ball mill tank, vacuumize it and fill it with argon as a protective atmosphere, and perform mechanical alloying on a planetary ball mill, where the ball-to-material rat...

Embodiment 3

[0059] Step 1: Design of low-density high-entropy alloy

[0060] AlSiCuTiCr series high-entropy alloys were designed, and the specific composition of the selected high-entropy alloys was Al 0.5 SiCu 0.5 TiCr, its theoretical density is 4.96g / cm 3 , according to the high-entropy alloy Al 0.5 SiCu 0.5 The molar atomic ratio and mass fraction of each main element in TiCr, the mass of each component is calculated as pure Al powder 7.79g, pure Si powder 16.21g, pure Cu powder 18.34g, pure Ti powder 27.64g, pure Cr powder 30.02g , and use an electronic balance to weigh the corresponding mass, and then mix the powder on a V-type powder mixer for 10 hours until uniform.

[0061] Step 2: Preparation of low-density high-entropy alloy powder by mechanical alloying

[0062] Put the uniformly mixed powder in step 1 into a stainless steel ball mill tank, vacuumize and fill it with argon as a protective atmosphere, and perform mechanical alloying on a planetary ball mill, where the ball...

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Abstract

The invention belongs to the technical field of high-entropy alloy and discloses a low-density and high-entropy alloy material and a preparation method of the low-density and high-entropy alloy material. The low-density and high-entropy alloy material belongs to the AlSiTi series and comprises all the three elements of Al, Si and Ti and two or more of the elements of V, Cr, Cu, Ni and the like, and the theoretical density is 4.52 g/cm<3>-5.76 g/cm<3>. The preparation method includes the steps that 1, material are prepared; 2, low-density and high-entropy alloy powder is prepared through mechanical alloying; and 3, a low-density and high-entropy alloy block is subjected to sintering synthesis, and the low-density and high-entropy alloy block can be obtained through sinter, specifically, the technical conditions include that a spark plasma sintering system serves as a sintering device, the temperature increase rate is 50-120 DEG C per minute, the sintering temperature is 900-1200 DEG C, the heat preservation time is 5-20 min, and the sintering pressure is 20-50 MPa. The density of the low-density and high-entropy alloy material is much lower than that of existing system high-entropy alloy.

Description

technical field [0001] The invention belongs to the technical field of high-entropy alloys, in particular to a low-density high-entropy alloy material and a preparation method thereof. The high-entropy alloy of the present invention is an AlSiTi system, including three elements of Al, Si, and Ti, and two or three of elements such as V, Cr, Cu, and Ni, and has a theoretical density of 4.52g / cm 3 ~5.76g / cm 3 . Background technique [0002] High-entropy alloys (HEAs) are a new classification in the multi-component alloy system. It breaks through the traditional alloy design framework with one or two metal elements as the main components. It is a new alloy design concept and is currently One of the hot spots in the research of new metal materials. Existing research on high-entropy alloy systems mainly focuses on transition metal elements such as Co, Cr, Fe, Ni, Mn and some metal elements with higher melting points. The alloy density is relatively high, generally at 8.0g / cm 3...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C30/02C22C1/05B22F3/105B22F9/04
CPCC22C1/05C22C30/02B22F3/105B22F9/04B22F2009/043
Inventor 朱德智丁霞张卫文戚龙飞
Owner GUANGDONG XINGFA ALUMINUM
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