Aluminum alloy nanoparticle reinforced composite material and preparation method thereof

A reinforced composite material and nanoparticle technology, which is applied in the field of aluminum alloy nanoparticle reinforced composite material and its preparation, can solve problems such as thermal cracks and mechanical property degradation, and limit the practical application of additive processing, so as to improve thermal cracking and guarantee performance, the effect of avoiding agglomeration

Inactive Publication Date: 2022-03-01
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the poor weldability of Al–Zn–Mg–Cu based aluminum alloys can lead to thermal cracks and deterioration of mechanical properties during additive processing, which severely limits its practical application in additive processing.

Method used

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  • Aluminum alloy nanoparticle reinforced composite material and preparation method thereof
  • Aluminum alloy nanoparticle reinforced composite material and preparation method thereof
  • Aluminum alloy nanoparticle reinforced composite material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] This embodiment provides a method for preparing an aluminum alloy nanoparticle-reinforced composite material. Among them, the chemical composition of the rare earth aluminum alloy powder includes: Zn: 6%, Mg: 5%, Cu: 3%, Mn: 0.3%, Ni: 0.3%, Cr: 0.03%, Ti: 0.03%, Zr: 0.1%, Er: 0.3%, Yb: 0.3%, oxygen content ≤ 1000ppm, the balance is Al. The reinforcement phase adopts ZrB with a mass fraction of 3% 2 Particles: the single impurity amount of P, S or N in the rare earth aluminum alloy powder is not more than 0.05%, and the total amount of impurities is not more than 0.15%.

[0048] First, step S1: manufacture spherical powder of nanoparticle-reinforced rare earth aluminum alloy composite material: use vacuum atomization method to prepare rare earth aluminum alloy powder containing the above chemical composition and ZrB 2 Granular powder, after which rare earth aluminum alloy powder and ZrB with a mass fraction of 3% were mixed by homogeneous method 2 The particle powder ...

Embodiment 2

[0055] This embodiment provides a method for preparing an aluminum alloy nanoparticle-reinforced composite material. Among them, the chemical composition of the base aluminum alloy powder is: Zn: 6%, Mg: 3%, Cu: 3%, Mn: 0.2%, Ni: 0.3%, Cr: 0.03%, Ti: 0.03%, Zr: 0.1%, Er: 0.3%, La: 0.3%, oxygen content ≤ 1000ppm, P, S, N and other individual impurities are not more than 0.05%, the total amount of impurities is not more than 0.15%, and the balance is Al. The reinforcement phase uses TiC particles with a mass fraction of 5%.

[0056] First, step S1: manufacture spherical powder of nanoparticle-reinforced rare-earth aluminum-alloy composite material: first, the rare-earth aluminum-alloy powder and TiC particle powder containing the above-mentioned chemical composition are respectively prepared by vacuum atomization method, and then the rare-earth aluminum alloy powder and TiC particle powder are prepared by homogeneous method The aluminum alloy powder and the TiC particle powder ...

Embodiment 3

[0063] This embodiment provides a method for preparing an aluminum alloy nanoparticle-reinforced composite material. Among them, the chemical composition of the base aluminum alloy powder is: Zn: 7%, Mg: 2%, Cu: 2%, Mn: 0.1%, Ni: 0.1%, Cr: 0.03%, Ti: 0.03%, Zr: 0.1%, Sc: 0.3%, La: 0.3%, oxygen content ≤ 1000ppm, P, S, N and other individual impurities are not more than 0.05%, the total amount of impurities is not more than 0.15%, and the balance is Al. The reinforcement phase adopts Al with a mass fraction of 12% 2 o 3 particles.

[0064] First, step S1: manufacture spherical powder of nanoparticle-reinforced rare-earth aluminum-alloy composite material: use vacuum atomization method to prepare rare-earth aluminum-alloy powder and Al 2 o 3 Particle powder, after which the rare earth aluminum alloy powder and the mass fraction of 12% Al were mixed by homogeneous method 2 o 3 The particle powder is mixed evenly, and the specific steps are: (1) Al 2 o 3 Granular powder an...

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Abstract

The invention discloses an aluminum alloy nano-particle reinforced composite material and a preparation method thereof.The aluminum alloy nano-particle reinforced composite material comprises rare earth aluminum alloy and reinforced phase nano-particles, the nano-particles account for 0.2%-30% of the total mass, the reinforced nano-particles and aluminum alloy matrix powder are mixed, deionized water is adopted to avoid agglomeration of the reinforced particles, and the rare earth aluminum alloy matrix powder is prepared; by means of the method, the interface bonding degree and wettability of a reinforcing body and a base body can be higher, the powder fluidity is better, and the performance of the powder used for additive manufacturing of formed parts is guaranteed, the modification effect of rare earth elements added into the base body aluminum alloy is combined with the reinforcing effect of nano particles, and the performance of the formed parts is improved. The aluminum alloy nano-particle reinforced composite material can effectively improve the phenomenon that the Al-Zn-Mg-Cu series aluminum alloy is prone to hot cracking in the additive manufacturing process, meanwhile, grains can be refined, the strength of the aluminum alloy formed through additive manufacturing is further improved, the density of the aluminum alloy nano-particle reinforced composite material reaches up to 99.7%, and the volume fraction of a reinforced phase can reach 5.0% or above.

Description

technical field [0001] The invention belongs to the field of additive manufacturing of metal-based composite materials, and in particular relates to an aluminum alloy nanoparticle-reinforced composite material and a preparation method thereof. Background technique [0002] As one of the most important lightweight materials, aluminum alloy has relatively low density and excellent thermal conductivity, and has a large number of applications in aerospace, mechanical equipment, electronic devices and other fields. Among high-strength aluminum alloys, Al–Zn–Mg–Cu series aluminum alloys have attracted extensive attention from academia and industry because of their extremely high strength, good processability, and excellent corrosion resistance. However, it is very difficult to fabricate Al–Zn–Mg–Cu alloy parts with complex shapes and ultrafine microstructures using conventional casting and forging techniques. [0003] Additive manufacturing technology is an advanced forming manuf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C32/00C22C21/12C22C21/10C22C21/06B22F9/02B22F1/054B22F1/12
CPCC22C21/10C22C21/06C22C21/12C22C32/00C22C32/0005B22F9/02
Inventor 陈祯张树哲姚森魏培李敏
Owner XI AN JIAOTONG UNIV
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