High-entropy alloy reinforced magnesium-based composite material and preparation method thereof

A high-entropy alloy and composite material technology is applied in the field of high-entropy alloy reinforced magnesium-based composite materials and their preparation, and can solve the problems of poor creep resistance, insufficient strength and hardness, and too fast deformation rate. , to achieve the effect of good industrialization prospects, high hardness and low cost

Inactive Publication Date: 2020-02-21
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the field of magnesium-based composite materials currently being studied, there are few types of matrix alloys. For example, although the commonly used AZ91D magnesium alloy has good tensile strength and die-casting performance, its creep resistance is not very good; the creep resistance of AS41B magnesium alloy Good, but the strength and hardness are not high enough to meet the needs of improving the overall performance of magnesium-base

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  • High-entropy alloy reinforced magnesium-based composite material and preparation method thereof

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Effect test

Example Embodiment

[0037] Implementation case 1

[0038] The preparation method of the above-mentioned high-entropy alloy reinforced magnesium-based composite material includes the following steps:

[0039] (1) Preparation of high-entropy alloy ingots:

[0040] The high-entropy alloying element FeCoCrNiMn to be prepared is weighed according to the equal atomic ratio and placed in a water-cooled copper mold fixed in a vacuum arc furnace, smelted in a vacuum environment, and argon gas is introduced for protection. Repeated smelting 5 times to prevent component segregation and obtain a high-entropy alloy ingot with uniform composition;

[0041] The purity of each raw material is not less than 99.5wt.%. When placed in a water-cooled copper crucible, each raw material is placed from bottom to top according to its melting point from low to high;

[0042] (2) Preparation of high-entropy alloy powder:

[0043] First, the high-entropy alloy ingot is milled into chips, and then the metal chips are ball-milled to a ...

Example Embodiment

[0053] Implementation case 2

[0054] (1) Preparation of high-entropy alloy ingots:

[0055] Weigh the required high-entropy alloying element FeCoCrNiCu according to the equivalent atomic ratio, place it in a water-cooled copper mold fixed in a vacuum arc furnace, smelt in a vacuum environment, and breathe in argon for protection. Smelt more than 5 times to prevent component segregation and obtain a high-entropy alloy ingot with uniform composition

[0056] The purity of each raw material is not less than 99.5wt.%. When placed in a water-cooled copper crucible, each raw material is placed from bottom to top according to its melting point from low to high;

[0057] (2) Preparation of high-entropy alloy powder:

[0058] First, the high-entropy alloy ingot is milled into chips, and then the metal chips are ball-milled to a particle size of 30μm in a ball mill in which argon is introduced in vacuum to prepare high-entropy alloy powder particles; the ball milling process parameters are: bal...

Example Embodiment

[0068] Implementation case 3

[0069] (1) Destined steps for preparing high-entropy alloys:

[0070] Weigh the required FeCoCrNiAl high-entropy alloy elements according to the equal atomic ratio and place them in a water-cooled copper mold fixed in a vacuum electric arc furnace. Melt in a vacuum environment and pass argon gas for protection and repeated smelting Prevent component segregation for more than 5 times and obtain high-entropy alloy ingot with uniform composition

[0071] The purity of each raw material is not less than 99.5wt.%. When placed in a water-cooled copper crucible, each raw material is placed from bottom to top according to its melting point from low to high;

[0072] (2) Preparation of high-entropy alloy powder:

[0073] First, the high-entropy alloy ingot is milled into chips, and then the metal chips are ball-milled to a particle size of 30μm in a ball mill in which argon is introduced in vacuum to prepare high-entropy alloy powder particles; the ball milling pr...

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Abstract

The invention discloses a high-entropy alloy reinforced magnesium-based composite material and a preparation method thereof. A high-entropy alloy is used as a reinforced phase of the composite material; and a magnesium alloy is used as a matrix of the composite material. The preparation method comprises the following steps of: firstly preparing a high-entropy alloy ingot; then preparing high-entropy alloy powder; preparing composite powder by using the high-entropy alloy powder and magnesium alloy powder; and finally performing sintering molding, hot extrusion molding and extrusion molding. The high-entropy alloy powder and the magnesium alloy matrix in the interface of the composite material have relatively good wettability, and are beneficial to the uniform diffusion of the high-entropyalloy in the magnesium alloy; a physical bonding type interface can be formed; the bonding strength of the interface is high; the interface state is good; and the problem that the generation of an effective interface between an existing magnesium alloy composite material and a reinforced body is difficult is solved.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and more specifically relates to a high-entropy alloy-reinforced magnesium-based composite material and a preparation method thereof. Background technique [0002] Magnesium-based composites have low density, high specific stiffness and specific strength, and also have good high temperature resistance, wear resistance, impact resistance, excellent shock absorption performance and good dimensional stability. In addition, it also has the characteristics of electromagnetic shielding and hydrogen storage. It is an excellent structural and functional material, and it is also one of the composite materials expected to be used in today's high-tech fields. The preparation methods include casting metallurgy, powder metallurgy, spray deposition, in-situ synthesis, etc. The commonly used reinforcement phases mainly include fiber reinforcement, whisker reinforcement and particle reinforcement. A...

Claims

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Application Information

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IPC IPC(8): C22C1/04C22C23/00
CPCC22C1/0408C22C23/00
Inventor 胡绳荪崔妍申俊琦
Owner TIANJIN UNIV
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