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Preparing method of nanometer alumina reinforced A356 aluminum alloy

A nano-alumina and aluminum alloy technology, applied in the field of material preparation, can solve problems such as weak bonding strength and poor coating effect, and achieve the effects of low cost, reduced agglomeration probability, and increased wettability

Inactive Publication Date: 2019-01-15
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In fact, due to the physical and mechanical combination of Mg and nano-alumina in this method, the bonding strength is weak, and the coating effect is not good, which brings a certain degree of randomness to subsequent production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Nano Al 2 o 3np Place in 10% NaOH solution and boil for 30 minutes, filter off the NaOH solution and rinse the particles with deionized water until the pH value is neutral, then filter and dry. The particles were boiled in concentrated hydrochloric acid for 30 minutes for coarsening, then washed with deionized water and dried. Under mechanical stirring, 10 g of SnCl 2 • 2H 2O was dissolved in 20ml of hydrochloric acid, then diluted with 100ml of distilled water, and then 25g of NaCl was added, and the sensitization solution was obtained after the solid was completely dissolved. Then the particle powder was placed in the sensitization solution and mechanically stirred for 10 min. 1g of PdCl 2 Add 100ml of distilled water, wait for complete dissolution, add 50ml of hydrochloric acid while stirring, stir until transparent. Add the activation solution to the sensitized powder, stir for 10 minutes and let stand. After the powder is precipitated, filter and wash the po...

Embodiment 2

[0032] Nano Al 2 o 3np Place in 10% NaOH solution and boil for 30 minutes, filter off the NaOH solution and rinse the particles with deionized water until the pH value is neutral, then filter and dry. The particles were boiled in concentrated hydrochloric acid for 30 minutes for coarsening, then washed with deionized water and dried. Under mechanical stirring, 10 g of SnCl 2 • 2H 2 O was dissolved in 20ml of hydrochloric acid, then diluted with 100ml of distilled water, and then 25g of NaCl was added, and the sensitization solution was obtained after the solid was completely dissolved. Then the particle powder was placed in the sensitization solution and mechanically stirred for 10 min. 1g of PdCl 2 Add 100ml of distilled water, wait for complete dissolution, add 50ml of hydrochloric acid while stirring, stir until transparent. Add the activation solution to the sensitized powder, stir for 10 minutes, and then let stand. After the powder is precipitated, filter and wash...

Embodiment 3

[0036] Nano Al 2 o 3np Place in 10% NaOH solution and boil for 30 minutes, filter off the NaOH solution and rinse the particles with deionized water until the pH value is neutral, then filter and dry. The particles were boiled in concentrated hydrochloric acid for 30 minutes for coarsening, then washed with deionized water and dried. Under mechanical stirring, 10 g of SnCl 2 • 2H 2 O was dissolved in 20ml of hydrochloric acid, then diluted with 100ml of distilled water, and then 25g of NaCl was added, and the sensitization solution was obtained after the solid was completely dissolved. Then the particle powder was placed in the sensitization solution and mechanically stirred for 10 min. 1g of PdCl 2 Add 100ml of distilled water, wait for complete dissolution, add 50ml of hydrochloric acid while stirring, stir until transparent. Add the activation solution to the sensitized powder, stir for 10 minutes, and then let stand. After the powder is precipitated, filter and wash...

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PUM

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Abstract

The invention relates to a preparing method of nanometer alumina reinforced A356 aluminum alloy. The preparing method comprises the following steps of: adsorbing Sn2+ ions on the surface of nanometerAl2O3np by using sensitizing liquid in an acidic environment, obtaining shell-type particles with nanometer Al2O3np as a core and Pd-Sn adsorbed on the surface as a chemical plating reaction center ina later activation process, and finally obtaining Cu-coated Al2O3np particles through chemical plating. Obtained powder and pure aluminum powder are mixed according to a certain proportion and are cold pressed to obtain prefabricated blocks. The prefabricated blocks are added into A356 aluminum alloy melt as required, Cu-coated Al2O3np is dispersed under the action of a high-energy ultrasonic instrument, grains are refined by high-energy ultrasonic vibration in the casting solidification process, and the whole process is carried out in a gas atmosphere. The product prepared by the method hasexcellent mechanical properties, and meanwhile the preparing method has the advantages of being simple, safe, low in cost, easy to apply and controllable.

Description

technical field [0001] The invention belongs to the technical field of material preparation. Background technique [0002] Particle-reinforced aluminum matrix composites have the advantages of light weight, high specific strength, high specific stiffness, low density, wear resistance and low cost, and have become one of the promising new materials. Therefore, they are used in the automotive industry, aerospace, electronics, It has been widely used in many fields such as military industry and sports. Among them, alumina-reinforced aluminum matrix composites have become the composite materials with the most attention, the most research and the widest potential application among metal matrix composites. [0003] A large number of studies have found that when the size of the reinforcement reaches the micron level, the mechanical properties of the composite material decrease with the increase of the reinforcement content, and the weak bonding interface and the crack coarsening i...

Claims

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Application Information

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IPC IPC(8): C22C1/10B22D27/08
CPCB22D27/08C22C1/1015C22C1/1036
Inventor 闫洪魏志帆
Owner NANCHANG UNIV
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