Preparing method of multielement nanometer composite strengthening thermal-resisting aluminum matrix composite

A composite material and nano-composite technology, which is applied in the field of preparation of heat-resistant aluminum-based materials technology, can solve the problems of difficulty in mastering, limited nano-enhanced phase dispersion ability, high energy consumption, etc., and achieves simple and easy preparation process and easy equipment requirements The effect of mastering and easy industrial production

Active Publication Date: 2016-03-09
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the main disadvantages of the above-mentioned existing technical solutions are: 1) The heat-resistant aluminum alloy prepared based on the rapid solidification method has very high requirements on the process and manufacturing equipment, and is difficult to master. 2) The method of mechanical alloying by high-energy ball milling takes a long time and consumes a lot of energy, and its ability to disperse the nano-reinforced phase is very limited; 3) The friction stir welding method is suitable for the preparation of thin plates, but it is difficult to use it for large thickness bulk material

Method used

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  • Preparing method of multielement nanometer composite strengthening thermal-resisting aluminum matrix composite
  • Preparing method of multielement nanometer composite strengthening thermal-resisting aluminum matrix composite
  • Preparing method of multielement nanometer composite strengthening thermal-resisting aluminum matrix composite

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Effect test

Embodiment 1

[0046] 6mlTiCl 4 12g of citric acid and 10ml of ethylene glycol were dissolved in 40ml of alcohol, and magnetically stirred to fully dissolve to obtain a precursor solution; 3g of carbon nanotubes were sonicated in 400ml of alcohol for 1 hour to form a dispersed carbon nanotube dispersion. Add the precursor solution dropwise to the carbon nanotube dispersion, and continue ultrasonication for 1h to coat the precursor on the surface of the carbon nanotube, add 93g of aluminum powder to the dispersion, stir magnetically for 0.5h, and then filter and dry to obtain the precursor- Carbon nanotube-aluminum composite powder. Then put the precursor-carbon nanotube-aluminum composite powder into the N 2 Heating to 230°C in a tube furnace under atmosphere protection for 1h reaction, and then heating to 600°C for 0.5h to remove residual organic matter on the surface to obtain nano-titanium oxide-carbon nanotube-aluminum composite powder. The nano-titanium oxide-carbon nanotube-aluminum ...

Embodiment 2

[0048] 9gLa 2 Cl 3 ·5H 2 O and 5g of polyvinylpyrrolidone were dissolved in 20ml of water, and magnetically stirred to make them fully dissolved to obtain a precursor solution; respectively, 1g of carbon nanotubes and 1g of graphene were sonicated in 200ml of water for 1h to form a dispersed carbon nanotube dispersion. Add half of the mass of the precursor solution to the carbon nanotube dispersion and the graphene dispersion respectively, and continue to sonicate for 1 hour to coat the precursor on the surface of the carbon nanotube and graphene, and then filter and dry to obtain the precursor - Carbon nanotube composite powder. Put the precursor-carbon nanotube composite powder into the N 2 Heating to 600° C. for 2 hours in a tube furnace under atmosphere protection to obtain nanometer lanthanum oxide-carbon nanotube composite powder. After mixing the nano-lanthanum oxide-carbon nanotube composite powder with 93g of aluminum powder, ball milled in a planetary ball mill f...

Embodiment 3

[0050] 12gNiCl 2 ·6H 2 O and 20g of glucose were dissolved in 20ml of water, and magnetically stirred to fully dissolve it to obtain a precursor solution; 0.5g of graphene oxide was ultrasonicated in 200ml of water for 1 hour to form a graphene oxide dispersion. Add the precursor solution dropwise to the graphene oxide dispersion, and continue ultrasonication for 1 h to coat the precursor on the graphene oxide surface. Put 96.5g of 2024 aluminum alloy powder in 200ml of water for magnetic stirring, and slowly add graphene oxide dispersion liquid dropwise, then vigorously stir the solution, add 8g of sodium borohydride, and then carry out suction filtration and drying to obtain nano-nickel-graphene oxide-aluminum composite powder. The nano-nickel-graphene oxide-aluminum composite powder was cold-pressed into an ingot with a diameter of 40 mm in a steel mold and then heated at 600 °C and N 2 Sintering under atmosphere for 2h. During the sintering process, the nano-nickel rea...

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Abstract

The invention provides a preparing method of a multielement nanometer composite strengthening thermal-resisting aluminum matrix composite. The surface of nanocarbon is coated with a metal ion precursor in advance, the nanocarbon is evenly scattered in aluminum powder, the precursor is converted into oxide through thermal treatment, reactive sintering and densifying treatment are carried out on the obtained composite powder, and the multielement nanometer strengthening aluminum matrix composite is obtained. The nanocarbon has the high specific surface area, the feature size of the nanocarbon is far larger than that of the nanometer oxide, and therefore a proper amount of nanometer oxide can be loaded and evenly led into the aluminum powder, metallic oxide, carbide, an intermetallic compound and other multielement nanometer strengthening phases are generated through the in-situ reaction, and the tissue stability and the thermal resistance of the aluminum matrix composite are improved coordinately. The method achieves the purposes of even leading of high-volume-content multielement nanometer strengthening phases and the space occupation control, and the conventional powder metallurgy technology can be adopted for preparing the multielement nanometer composite strengthening thermal-resisting aluminum matrix composite.

Description

technical field [0001] The invention relates to a preparation method in the technical field of heat-resistant aluminum-based materials, in particular to a preparation method for a multi-component nano-phase reinforced aluminum-based composite material. Background technique [0002] Aluminum alloys are widely used in aerospace and transportation fields due to their light weight, high strength, corrosion resistance, and easy processing. Among them, heat-resistant aluminum-based materials that can be used to prepare components that serve at high temperatures, such as tank armored vehicle engines The pistons, cylinder liners, connecting rods, boxes, cylinder heads, missile shells, empennages, aero-engine cylinders, blades, aircraft skins, etc. are all made of heat-resistant aluminum-based materials. The rapid development of aviation, aerospace and automobile industries has put forward higher and higher requirements for the heat resistance of heat-resistant aluminum-based materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C1/10C22C21/00
CPCC22C1/05C22C1/10C22C21/00
Inventor 李志强陈马林谭占秋范根莲熊定邦郭强张荻
Owner SHANGHAI JIAO TONG UNIV
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