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A cryogenically treated aluminum matrix composite material reinforced by high-entropy alloy particles and its preparation method

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: 2022-05-20
JIANGSU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A cryogenically treated aluminum matrix composite material reinforced by high-entropy alloy particles and its preparation method
  • A cryogenically treated aluminum matrix composite material reinforced by high-entropy alloy particles and its preparation method
  • A cryogenically treated aluminum matrix composite material reinforced by high-entropy alloy particles and its preparation method

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Experimental program
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Embodiment 1

[0036] According to this embodiment figure 1 The process shown in the preparation of aluminum matrix composites, specifically:

[0037] (1) Raw material selection, the purity of the prepared high-entropy alloy metal powder is 99.9% and above, the particle size of the powder is not greater than 45 μm, and the high-entropy alloy components are compounded according to the molar ratio; the purity of the prepared 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 atomic ratio expression of the selected high-entropy alloy components is FeCoNi 1.5 CrCuM, M is Nd and B;

[0038] The aluminum matrix is ​​an aluminum alloy added with microalloying elements Ti, La, Sc and Sm. The microalloying elements added to pure aluminum are Ti, La, Sc and Sm; the microalloying elements are weighe...

Embodiment 2

[0051] Preparation of high-entropy alloy powder: the mass content of high-entropy alloy powder was 40wt% and the mass content of aluminum matrix alloy powder was 60wt% when the experimental design was mixed; the rest of the preparation method was the same as that of Example 1.

[0052] a. From the microstructure diagram Figure 5 It can be seen that the cryogenically treated aluminum-based composite material with a mass content of 40wt% high-entropy alloy reinforced according to the preparation method of Example 1 is compared with the sample in Example 1, and the content of high-entropy alloy phase in the aluminum-based composite material is obviously increased. . image 3 Shown is the XRD before and after cryogenic treatment in the present embodiment, and XRD analysis finds, marked the main magnetic phase Nd that some diffraction peaks change 2 Fe 14 B and the non-main magnetic phase, by comparing the PDF cards, it can be found that the main magnetic phase Nd 2 Fe 14 The ...

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Abstract

The invention belongs to the technical field of composite material preparation, and in particular relates to a cryogenically treated aluminum-based composite material reinforced by high-entropy alloy particles and a preparation method thereof. In the present invention, the high-entropy alloy composition is optimally designed, and then the high-entropy alloy is prepared by vacuum ball milling, and the high-entropy alloy powder and the micro-alloyed aluminum matrix powder are mixed in proportion and uniformly dried to obtain a mixed powder; and the cold isostatic pressing is used to form the obtained Composite material billet; aluminum matrix composite material reinforced by high entropy alloy particles is obtained by microwave sintering process; finally, the aluminum matrix composite material is subjected to cryogenic treatment. The invention realizes the improvement of the strength and plasticity of the aluminum-based composite material while the high-entropy alloy particles reinforce the aluminum-based composite material, and at the same time enables the aluminum-based composite material to have good magnetic properties.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, in particular to a cryogenically treated aluminum-based composite material reinforced by high-entropy alloy particles and a preparation method thereof. Background technique [0002] With the deepening of research on aluminum matrix composites, it is found that aluminum matrix composites reinforced with particles have excellent properties such as high specific strength, high specific modulus, wear resistance and good dimensional stability. Due to the natural interfacial bonding characteristics between 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 reinforcing phase of aluminum-based materials can break through the traditional Ceramic particles strengthen and toughen the bottleneck of aluminum-based materials, which can improve the strength a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/04B22F3/04B22F3/105B22F3/24B22F1/052C22C21/00C22C1/04
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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