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High-entropy alloy particle reinforced cryogenic treatment aluminum-based composite material and preparation method thereof

A technology of aluminum-based composite materials and high-entropy alloys, which is applied in the field of cryogenically treated aluminum-based composite materials reinforced by high-entropy alloy particles and its preparation, can solve the problems of small size, poor performance of alloy materials, and high cost, and achieve grain boundaries Smooth, reliable coercive force, high energy product effect

Active Publication Date: 2019-12-03
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-entropy alloys can have high strength and good plasticity through composition design, but there are few studies on their magnetic properties, and the existing high-entropy alloy systems often contain ferromagnetic elements Fe, Co, and Ni. Therefore, the research has good Magnetic high-entropy alloy reinforced aluminum matrix composites with comprehensive performance is imperative
[0003] When using high-entropy alloy particles to reinforce aluminum matrix composites, there are many ways to prepare high-entropy alloy reinforcements. At present, the most mature and widely used method is to use vacuum arc melting and copper mold rapid water cooling; but button ingots prepared by arc melting The size is small, and the coarse as-cast structure of the high-entropy alloy makes the performance of the alloy material poor. In addition, as a particle reinforcement, the as-cast high-entropy alloy must be crushed before it can be added to the aluminum-based matrix; the efficiency of this traditional method Lower, higher cost, and to some extent affect the performance of reinforced aluminum matrix composites

Method used

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  • High-entropy alloy particle reinforced cryogenic treatment aluminum-based composite material and preparation method thereof
  • High-entropy alloy particle reinforced cryogenic treatment aluminum-based composite material and preparation method thereof
  • High-entropy alloy particle reinforced cryogenic treatment aluminum-based composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] This example is based on figure 1 The shown process flow prepares aluminum matrix composites, specifically:

[0037] (1) Selection of raw materials, the purity of the prepared high-entropy alloy metal powder is 99.9% and above, the powder particle size is not more than 45 μm, and the high-entropy alloy components are prepared according to the molar ratio; the purity of the pure aluminum powder is 99.9wt% and above. , the particle size of pure aluminum powder is not more than 300μm, and the metal powder is weighed by an electronic balance with an accuracy of 0.01g. The high-entropy alloy particles are reinforcements, and the composition atomic ratio expression of the prepared high-entropy alloy is FeCoNi 1.5 CrCuM, M is Nb and B;

[0038] The aluminum matrix is ​​an aluminum alloy to which microalloying elements Ti, La, Sc and Sm are added. The micro-alloying elements added to pure aluminum are Ti, La, Sc and Sm; the micro-alloying elements are added by volume fractio...

Embodiment 2

[0051] Preparation of high-entropy alloy powder: the mass content of the high-entropy alloy powder is 40 wt % and the mass content of the aluminum matrix alloy powder is 60 wt % when mixing powders in the experimental design; other preparation methods are the same as those in Example 1.

[0052] a. From the microstructure diagram Figure 5 Compared with the sample in Example 1, the cryogenically treated aluminum matrix composite material with a mass content of 40wt% high-entropy alloy reinforced obtained according to the preparation method of Example 1, it is obvious that the content of the high-entropy alloy phase in the aluminum matrix composite material increases. . image 3 The XRD before and after cryogenic treatment in this example is shown. The XRD analysis found that some main magnetic phase Nd with changes in diffraction peaks was marked. 2 Fe 14 B and non-main magnetic phase, by comparing the PDF card, it can be found that the main magnetic phase Nd of the aluminum...

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Abstract

The invention belongs to the technical field of composite material preparation, and particularly relates to a high-entropy alloy particle reinforced cryogenic treatment aluminum-based composite material and a preparation method thereof. High-entropy alloy components are optimally designed, then vacuum ball milling is conducted to prepare high-entropy alloy, and high-entropy alloy powder and microalloyed aluminum matrix powder are evenly mixed in proportion and dried to obtain mixed powder; compression molding is performed by utilizing isostatic cool pressing to obtain a composite billet; a microwave sintering process is adopted to obtain a high-entropy alloy particle reinforced aluminum-based composite material; and finally, cryogenic treatment is performed on the aluminum-based compositematerial. According to the high-entropy alloy particle reinforced aluminum-based composite material, the strength and plasticity of the aluminum-based composite material are improved, and meanwhile the aluminum-based composite material can have good magnetic performance.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a cryogenically treated aluminum matrix composite material reinforced by high-entropy alloy particles and a preparation method thereof. Background technique [0002] With the in-depth research on aluminum matrix composites, it is found that the use of particle reinforced aluminum matrix composites has excellent properties such as high specific strength, high specific modulus, wear resistance and dimensional stability. Due to the natural interface bonding characteristics between metals and metals, the interfacial lubricity and interfacial compatibility between high-entropy alloys and aluminum-based substrates are good; using specific high-entropy alloy particles as the reinforcement phase of aluminum-based materials can break through the traditional The bottleneck of ceramic particle reinforcement and toughening of aluminum matrix materials can improve the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04B22F3/04B22F3/105B22F3/24B22F1/00C22C21/00C22C1/04
CPCB22F9/04B22F3/04B22F3/105B22F3/24C22C21/00C22C1/0416B22F2009/043B22F2009/042B22F2003/1054B22F2999/00B22F1/052B22F2201/11B22F2201/20B22F2202/05Y02P10/25
Inventor 李桂荣文浩然王宏明刘明赵玉涛
Owner JIANGSU UNIV
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