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A kind of high thermal conductivity and high strength particle reinforced cast aluminum alloy and its preparation method

A technology of casting aluminum alloy and particle reinforcement, which is used in chemical instruments and methods, mixers, transportation and packaging, etc., can solve the problems of uniform dispersion and low strength of high thermal conductivity aluminum alloys, reduce physical and chemical reactions at the interface, and is conducive to long-term Good service and interface combination

Active Publication Date: 2022-06-28
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problems to be solved by the present invention are: the dispersion uniformity of high-entropy alloy particles in the high-thermal-conductivity aluminum alloy matrix, the low strength of high-heat-conduction aluminum alloy, etc.

Method used

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  • A kind of high thermal conductivity and high strength particle reinforced cast aluminum alloy and its preparation method

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Embodiment 1

[0034] A preparation method of high thermal conductivity and high strength particle reinforced cast aluminum alloy:

[0035] Step 1: Preparation of high-entropy alloy powder

[0036] First of all, AlCoCrFe, AlCoCrFeNi series high-entropy alloy particles are selected as the reinforcing phase, and the ratio of each component is 1:1. According to the molar atomic ratio and mass fraction of each element, the mass of each component is calculated respectively, and then loaded into a stainless steel ball mill after weighing. In the process, the process control agent is absolute ethanol, vacuumed, filled with argon, and then mechanically alloyed on a planetary ball mill jar for 60h, the ball-to-material ratio is 8:1, and the rotational speed is 250r / min, the preparation gives a high-entropy alloy Powder, the particle size is 1-20μm after sieving.

[0037] Step 2: Weigh the high-entropy alloy powder prepared in step 1, the mass fraction is 3%, and the composition range of the high the...

Embodiment 2

[0041] A preparation method of high thermal conductivity and high strength particle reinforced cast aluminum alloy:

[0042] Step 1: Preparation of high-entropy alloy powder

[0043] First, AlSiTiNi, AlSiTiCrCu series high-entropy alloy particles are selected as the reinforcing phase, and the cost ratio of each element is 1:1. According to the molar atomic ratio and mass fraction of each element, the mass of each component is calculated respectively, and then weighed and put into a stainless steel ball mill jar In the process, the process control agent is absolute ethanol, vacuumed, filled with argon, and then mechanically alloyed on a planetary ball mill jar for 60h, the ball-to-material ratio is 8:1, and the rotational speed is 250r / min, the preparation gives a high-entropy alloy Powder, the particle size is 1-20μm after sieving.

[0044] Step 2: Weigh the high-entropy alloy powder prepared in step 1, the mass fraction is 6%, and the composition range of the high thermal co...

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Abstract

The invention discloses a particle-reinforced casting aluminum alloy with high thermal conductivity and high strength and a preparation method thereof. The invention adopts the method of gas dispersion and stirring to strengthen the alloy particles by adding a mass percentage of 0.1-10% into the aluminum alloy melt to fully disperse, vibrate and degas, and then adopts a die-casting process to prepare high-thermal conductivity and high-strength particle-reinforced cast aluminum alloys for molding parts; the high-entropy alloy particles are composed of at least four elements of Al, Fe, Cu, Co, Cr, Ni, Ti, Si, and Mg, and the aluminum alloy melt is a high thermal conductivity aluminum alloy. The high-entropy alloy particles have good structural thermal stability, slow diffusion in the aluminum alloy melt causes small lattice distortion of the α-aluminum matrix, and does not generate a large amount of intermetallic compounds. Under the condition of not greatly reducing the thermal conductivity, Improve the hardness and strength of the material.

Description

technical field [0001] The invention relates to a lightweight, high-conductivity, high-strength, and high-entropy alloy particle-reinforced cast aluminum alloy and a preparation process thereof, belonging to the technical field of aluminum-based composite material manufacturing. Background technique [0002] Aluminum-based composite materials have the advantages of light weight, high specific strength, wear resistance, etc., and have a broad application background in aerospace, automobile, electronics, transportation and other fields, especially for high-strength, high-toughness, and high thermal conductivity aluminum alloy materials. Promote the development of aluminum matrix composite materials. However, traditional non-metallic reinforced aluminum matrix composites have many problems, such as poor wettability between ceramic particles and fiber reinforcements and aluminum matrix, poor interface bonding, easy interface cracking during service, and material failure. The hi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/03C22C21/00B22D17/00B01F33/40
CPCC22C1/03C22C1/026C22C21/00B22D17/007B01F33/4021B01F33/408B01F33/4094C22C1/12
Inventor 周冰仇志艳陈可平徐春王占勇
Owner SHANGHAI INST OF TECH
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