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A kind of ceramic-aluminum composite material for additive manufacturing, preparation method and additive manufacturing method of ceramic-aluminum composite structural parts

An aluminum composite material and additive manufacturing technology, applied in the field of additive manufacturing, can solve the problems of easy oxidation, difficult forming, insufficient strength of aluminum alloy, etc., and achieve high hardness and wear resistance, good dimensional stability, and low thermal expansion The effect of the coefficient

Active Publication Date: 2021-02-19
XI AN JIAOTONG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As the most widely used metal material in the aerospace industry, high-strength aluminum alloys have great potential in the application of additive manufacturing structures; however, high-strength aluminum alloys have low absorption rate of laser light, high thermal conductivity, easy oxidation and strong heat dissipation. Tendency, forming is difficult, and the printed aluminum alloy is not only insufficient in strength, but also has defects such as cracks
[0004] In order to solve the above problems, most of the current high-energy ball milling method is used to attach ceramic materials to aluminum alloy powder. The defects of this method include: the chemical composition of the powder will be changed, the safety is poor, the powder is easy to agglomerate, and the nano-ceramic powder cannot effectively Dispersed on the surface of aluminum powder

Method used

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  • A kind of ceramic-aluminum composite material for additive manufacturing, preparation method and additive manufacturing method of ceramic-aluminum composite structural parts
  • A kind of ceramic-aluminum composite material for additive manufacturing, preparation method and additive manufacturing method of ceramic-aluminum composite structural parts

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Embodiment 1

[0054] A method for preparing a ceramic-aluminum composite material for additive manufacturing according to an embodiment of the present invention includes the following steps:

[0055] S1, dispersing the aluminum alloy powder in an aqueous solution of cetyltrimethylammonium bromide, stirring, filtering, washing, and vacuum drying, to obtain positively charged aluminum alloy powder particles;

[0056] S2, disperse the nano ceramic powder and the positively charged aluminum alloy powder particles obtained in step S1 in deionized water; mix and stir to obtain negatively charged nano ceramic powder particles and make the negatively charged nano ceramic powder The particles are adsorbed on the surface of the positively charged aluminum alloy powder particles; after filtration, vacuum drying and sieving, the ceramic-aluminum composite powder for additive manufacturing is obtained;

[0057] Wherein, in step S1 and step S2, ultrasonic dispersion is used as the dispersion method; magn...

Embodiment 2

[0061] In the embodiment of the present invention, there are only the following differences from Embodiment 1, and the rest are the same, and the difference is:

[0062] In step S1, the aluminum alloy powder is Al-Cu-based and Al-Si-based mixed aluminum alloy powder; the average particle size range of the aluminum alloy powder is 50um; the cetyltrimethylammonium bromide aqueous solution The concentration range is 1mol / L.

[0063] In step S2, the mass of negatively charged nano-ceramic powder particles is 15% of the mass of positively charged aluminum alloy powder particles; the nano-ceramic powder is a mixture of silicon nitride and silicon carbide; the nano-ceramic powder The average particle size range is 300nm. A 300-mesh sieve was used for sieving.

Embodiment 3

[0065] In the embodiment of the present invention, there are only the following differences from Embodiment 1, and the rest are the same, and the difference is:

[0066] In step S1, the aluminum alloy powder is Al-Mg mixed aluminum alloy powder; the average particle size range of the aluminum alloy powder is 80um; the concentration range of the cetyltrimethylammonium bromide aqueous solution is 2mol / L.

[0067] In step S2, the mass of the negatively charged nano-ceramic powder particles is 20% of the mass of the positively charged aluminum alloy powder particles; the nano-ceramic powder is silicon carbide; the average particle diameter of the nano-ceramic powder ranges from 500nm. A 500-mesh sieve was used for sieving.

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Abstract

The invention discloses a ceramic-aluminum composite material for additive manufacturing, a preparation method and an additive manufacturing method for ceramic-aluminum composite structural parts, comprising: dispersing aluminum alloy powder in cetyl trimethyl bromide In the ammonium aqueous solution, after stirring, filtering, washing and vacuum drying, positively charged aluminum alloy powder particles are obtained; nano-ceramic powder and positively charged aluminum alloy powder particles are dispersed in deionized water; mixed and stirred, Obtain negatively charged nano-ceramic powder particles and adsorb the negatively-charged nano-ceramic powder particles on the surface of positively charged aluminum alloy powder particles; after filtering, vacuum drying, and sieving, obtain ceramic‑aluminum composite powder. The preparation method of the present invention does not change the chemical composition of the powder, and is safe and efficient; the additive manufacturing method of the present invention has higher strength of the manufactured structural parts and less cracks.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a ceramic-aluminum composite material for additive manufacturing, a preparation method, and a method for additive manufacturing of ceramic-aluminum composite structural parts. Background technique [0002] Metal additive manufacturing is a disruptive technology for the aerospace, biomedical and automotive industries, enabling the rapid manufacture of parts of any complexity. Metal additive manufacturing is a metal additive technology process that directly uses 3D CAD data as the source of digitization. It directly uses 3D CAD data to export the industry standard format STL for printing, which can be manufactured into high-density metal products. [0003] Selective Laser Melting (SLM) uses metal powder as the raw material for processing, and accumulates the metal powder with the help of a high-energy-density laser beam. As the most widely used metal mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C32/00C22C21/00C22C1/05C22C1/10B22F3/105B22F10/28B33Y10/00B33Y70/00
CPCC22C32/0068C22C32/0063C22C21/00C22C1/05B33Y10/00B33Y70/00B22F10/00B22F10/34B22F12/17B22F10/28B22F10/36B22F10/366B22F10/32Y02P10/25
Inventor 鲁中良王程冬高云鹏苗恺邓欣李涤尘
Owner XI AN JIAOTONG UNIV
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