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Preparation method of a high-volume-fraction ceramic reinforced aluminum-based composite material

A high volume fraction, reinforced aluminum-based technology, applied in the field of aluminum-based composite materials, can solve the problems of difficult to achieve low thermal expansion coefficient, difficult to disperse ceramic reinforcements uniformly, poor mechanical properties, etc., to achieve fine grain size, low thermal expansion coefficient, The effect of low equipment requirements

Active Publication Date: 2020-10-02
范语楠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main disadvantages of these two methods are that the ceramic reinforcement is difficult to disperse uniformly, the mechanical properties are poor, it is difficult to achieve low thermal expansion coefficient and high thermal conductivity, and the processing of the product is difficult and costly

Method used

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  • Preparation method of a high-volume-fraction ceramic reinforced aluminum-based composite material
  • Preparation method of a high-volume-fraction ceramic reinforced aluminum-based composite material

Examples

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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, this embodiment provides a device for producing high volume fraction ceramic reinforced aluminum matrix composites, the working process of which is as follows: the aluminum wire 1 wrapped with ceramic particles is transported to the induction heater 3 through the conveying device 2, Perform rapid induction heating and melting to form molten droplets 5 wrapped with ceramic particles, and then high-pressure nitrogen gas 4 atomizes the molten droplets 5 from the surroundings of the molten droplets 5 to form micro-nano aluminum alloy droplets 7 and The ceramic particles 6 are co-deposited to form a high volume fraction ceramic reinforced aluminum matrix composite material 8 .

[0033] The aluminum alloy used in this application is 2024 aluminum alloy, and the mass percentages are as follows: 4% Cu, 1.8% Mg, 0.4% Mn, and the balance Al.

Embodiment 2

[0035] This example provides a method for preparing a high volume fraction ceramic reinforced aluminum matrix composite material, which is completed based on the device in Example 1. The specific preparation method includes the following steps:

[0036] S1. Pretreatment: Wrap SiC particles into aluminum alloy thin strips, and then weld the sealing part of the aluminum alloy thin strips to prepare aluminum wires filled with SiC particles, wherein the volume fraction of SiC particles is 45%;

[0037] S2. Heating and melting: transport the aluminum wire prepared in step S1 to an induction heater, rapidly induce heating and melting to form molten droplets filled with SiC particles, and the induction heating temperature is 1000°C;

[0038] S3. Atomization deposition: Use high-pressure nitrogen to atomize the molten droplets in step S2 into micro-nano-scale aluminum alloy droplets and SiC particles. The nitrogen pressure is 3MPa, the temperature is -15°C, and the deposition distance ...

Embodiment 3

[0040] This example provides a method for preparing a high volume fraction ceramic reinforced aluminum matrix composite material, which is completed based on the device in Example 1. The specific preparation method includes the following steps:

[0041] S1. Pretreatment: Wrap SiC particles into aluminum alloy thin strips, and then weld the sealing part of the aluminum alloy thin strips to prepare aluminum wires filled with SiC particles, wherein the volume fraction of SiC particles is 65%;

[0042] S2. Heating and melting: transport the aluminum wire prepared in step S1 to an induction heater, rapidly induce heating and melting to form molten droplets filled with SiC particles, and the induction heating temperature is 850°C;

[0043] S3. Atomization deposition: Use high-pressure nitrogen to atomize the molten droplets in step S2 into micro-nano-scale aluminum alloy droplets and SiC particles. The nitrogen pressure is 5MPa, the temperature is -20°C, and the deposition distance i...

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Abstract

The invention discloses a preparation method of a high-volume-fraction ceramic reinforced aluminum-based composite material. The preparation method comprises the following step of by using an aluminumalloy thin strip and ceramic particles as raw materials, conducting pretreating, heating, melting, atomizing and depositing to obtain the high-volume-fraction ceramic reinforced aluminum-based composite material. By means of the preparation method, the ceramic particle reinforced aluminum-based composite material with any high volume fraction can be prepared, ceramic particles are uniformly distributed in the aluminum-based composite material, the thermal expansion coefficient of the aluminum-based composite material can be remarkably reduced, and the comprehensive mechanical property of thecomposite material is improved. According to the method, deposition forming is adopted, the size of the ceramic reinforced aluminum matrix composite material can be adjusted by controlling the deposition distance and the aluminum wire conveying rate, and a ceramic reinforced aluminum matrix composite semi-finished product with the near-net size is prepared and can be applied to industrial production.

Description

technical field [0001] The invention relates to the technical field of aluminum-based composite materials, and more particularly, to a method for preparing a high-volume ceramic-reinforced aluminum-based composite material. Background technique [0002] Ceramic-reinforced aluminum matrix composites generally have excellent comprehensive properties such as low density, high specific stiffness, low expansion, and high thermal conductivity, and are expected to become new structural materials after aluminum alloys and titanium alloys. However, with the rapid development of aerospace technology and space exploration technology, ceramic-reinforced aluminum matrix composites with low volume fraction (5-30%) have been difficult to meet the requirements of the harsh environment of space, such as various structural parts widely used in aerospace. , electronic packaging, measuring instruments, optical devices, sensitive components, satellite lens tubes, etc., require lower thermal expa...

Claims

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Application Information

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IPC IPC(8): C22C29/06C22C29/12C22C21/16C22C1/04C22C1/10B22F9/08
CPCC22C29/065C22C29/12C22C21/16C22C1/1005C22C1/1042C22C1/1068B22F9/082B22F2009/0824B22F2009/0848B22F2009/0876
Inventor 范语楠范才河阳建君欧玲严红革何世文郑东升
Owner 范语楠
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