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Preparation method and application of graphene reinforced AlSi10Mg nanocomposite

A nanocomposite material and graphene technology, applied in the field of graphene-enhanced AlSi10Mg nanocomposite material preparation, can solve problems such as inability to meet the mechanical properties of parts, achieve high interface bonding and wettability, uniform distribution of graphene, and avoid agglomeration Effect

Pending Publication Date: 2021-07-27
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the development of science and technology, traditional alloys or simple materials have gradually been unable to meet the mechanical properties of parts.

Method used

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  • Preparation method and application of graphene reinforced AlSi10Mg nanocomposite
  • Preparation method and application of graphene reinforced AlSi10Mg nanocomposite
  • Preparation method and application of graphene reinforced AlSi10Mg nanocomposite

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preparation example Construction

[0030] A kind of graphene reinforced AlSi10Mg nano composite material preparation method, comprises the following steps:

[0031] S1, preparation of graphene oxide-deionized water suspension:

[0032] Mix the graphene oxide powder and deionized water evenly to obtain suspension A;

[0033] Specifically, the graphene oxide powder and deionized water are uniformly mixed by an ultrasonic vibration method to obtain a graphene oxide-deionized water suspension;

[0034] Among them, the number of film layers of graphene oxide powder is 1-2 layers, the particle size is 0.2-5nm, and the purity is 99.9%, such as figure 2 and image 3 As shown; the mass of graphene oxide powder and the volume ratio of deionized water are (1-20mg): 1ml, and the time of ultrasonic vibration is not less than 2h.

[0035] S2, mixing the suspension A and the AlSi10Mg powder uniformly under an ammonia atmosphere at a mixing temperature of 500-800° C., and then drying in a vacuum environment to obtain a gra...

Embodiment 1

[0042] (1) Take AlSi10Mg powder as the matrix powder, with a particle size of 15-53 μm. The mass of graphene oxide powder and the volume ratio of deionized water are 5mg:1ml, and the mass of graphene oxide in the graphene oxide-deionized water suspension is 0.3% of the mass of AlSi10Mg powder. Weigh 3g of graphene oxide and measure 600ml of deionized water. Sonicate and mix for 2h.

[0043] (2) Add 997g of AlSi10Mg powder and graphene oxide-deionized water suspension into the homogenizer. Set the revolution speed of the homogenizer to 20r / min, the autopropagation speed to 1000r / min, the flow rate of ammonia gas to 100ml / min, and the temperature to 500°C. Mixed reaction 5min, obtains mixture A.

[0044] (3) The mixture A was dried in vacuum for 12 hours, the drying temperature was set at 110°C, and the graphene-reinforced AlSi10Mg nanocomposite was obtained by drying.

[0045] (4) Use the laser selective melting technology to print samples with the powder, and carry out mecha...

Embodiment 2

[0048] (1) Take AlSi10Mg powder as the matrix powder, with a particle size of 15-53 μm. Take the mass of graphene oxide powder and the volume ratio of deionized water as 10mg:1ml, and the mass of graphene oxide in the graphene oxide-deionized water suspension is 0.6% of the mass of AlSi10Mg powder. Weigh 6g of graphene oxide and measure 600ml of deionized water. Sonicate and mix for 2h.

[0049] (2) Add 994g of AlSi10Mg powder and graphene oxide-deionized water suspension into the homogenizer together. Set the revolution speed of the homogenizer to 20r / min, the autopropagation speed to 1000r / min, the flow rate of ammonia gas to 100ml / min, and the temperature to 500°C. Mixed reaction 5min, obtains mixture A.

[0050] (3) The mixture A was dried in vacuum for 12 hours, the drying temperature was set at 110°C, and the graphene-reinforced AlSi10Mg nanocomposite was obtained by drying.

[0051] (4) Use the laser selective melting technology to print samples with the powder, and...

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Abstract

The invention discloses a preparation method and application of a graphene reinforced AlSi10Mg nanocomposite. Graphene oxide and deionized water are mixed to form turbid liquid, then mixing is performed at a high temperature of 500-800 DEG C in an ammonia gas atmosphere, ammonia gas is dissolved in the deionized water to be alkaline and can be decomposed into nitrogen gas and hydrogen gas at a high temperature, the nitrogen gas is used as a protective gas, the hydrogen gas is used as a reducing atmosphere, reduction of the graphene oxide can be accelerated in an alkaline and high-temperature environment, the reduced graphene can be more uniformly distributed in an AlSi10Mg matrix in the high-temperature environment, the reducing atmosphere and the protective atmosphere can be synchronously realized by utilizing decomposition of the ammonia gas in the high-temperature environment, and the proportion is uniform. According to the prepared graphene reinforced AlSi10Mg nanocomposite, the graphene oxide is reduced very thoroughly, graphene distribution is more uniform, the deionized water is mixed with the graphene oxide at first, agglomeration of graphene is avoided, the interface bonding degree and wettability of a reinforced phase and a matrix are higher, and the powder flowability is better.

Description

technical field [0001] The invention relates to the fields of AlSi10Mg nanocomposite materials and metal additive manufacturing, in particular to a preparation method and application of graphene-reinforced AlSi10Mg nanocomposite materials. Background technique [0002] 3D printing technology is based on the principle of accumulation, through the gradual accumulation of materials to achieve manufacturing technology. It uses the computer to cut the 3D model of the formed part into a series of "thin slices" of a certain thickness, and then uses the 3D printing equipment to manufacture each layer of thin slices from top to bottom and then superimpose to form a three-dimensional solid part. This technology does not require traditional tools, and can realize the manufacture of complex structures that cannot be processed by traditional processes. 3D printing technology has the advantages of not being limited by the structure and materials of parts, short cycle time, and simple pro...

Claims

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Application Information

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IPC IPC(8): B22F1/00B22F3/105B22F10/20C01B32/184B33Y10/00B33Y70/00
CPCB22F1/0007B22F3/105C01B32/184B33Y70/00B33Y10/00B22F1/145Y02P10/25
Inventor 陈祯张树哲姚森卢秉恒雷云佩魏培邹亚桐
Owner XI AN JIAOTONG UNIV
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