Carbon nanotube-reinforced magnesium-lithium composite material with ultra-light and high elastic modulus and preparation method thereof

A technology of carbon nanotubes and composite materials, applied in metal material coating technology, vacuum evaporation plating, coating, etc., can solve the problems of difficult preparation of magnesium-lithium-based composite materials and low elastic modulus of magnesium-lithium alloys, and achieve Protects the structure of carbon nanotubes, has good thermal stability, and improves the elastic modulus

Active Publication Date: 2021-08-03
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of low elastic modulus of magnesium-lithium alloy and difficult preparation of magnesium-lithium-based composite materials, the purpose of the present invention is to provide an ultra-light and high-elastic modulus carbon nanotube-reinforced magnesium-lithium composite material and its preparation method

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment relates to an ultra-light and high elastic modulus carbon nanotube reinforced magnesium-lithium matrix composite material, the mass percent of each component of the composite material is: Li 9%, Al 2%, Zn 0.5%, Sc 0.1% , carbon nanotube C 0.1%, the balance is Mg.

[0032] This embodiment relates to a method for preparing an ultra-light and high-elastic-modulus carbon nanotube-reinforced magnesium-lithium-based composite material. The process includes the following steps:

[0033] 1) Mg-plate the multi-walled carbon nanotubes with calculated addition amount 2 Si treatment, coating treatment adopts physical vapor deposition method, using ion plating equipment, Mg 2Si is placed in a crucible and heated to ~600°C, and the atoms are ionized by low-pressure argon discharge, and the ionized Mg is bombarded with energetic electrons. 2 Si film material, making Mg 2 Si is deposited on the surface of carbon nanotubes to form a film, and the thickness of the coat...

Embodiment 2

[0036] This embodiment relates to an ultra-light and high elastic modulus carbon nanotube reinforced magnesium-lithium matrix composite material, the mass percent of each component of the composite material is: Li 16%, Al 0.5%, Zn 2%, Sc 0.02% , nanotube C1.5%, the balance is Mg.

[0037] This embodiment relates to a method for preparing an ultra-light and high-elastic-modulus carbon nanotube-reinforced magnesium-lithium-based composite material. The process includes the following steps: MgO-plated multi-walled carbon nanotubes with a calculated addition amount, and the coating The treatment adopts the method of physical vapor deposition, using ion plating equipment, heating MgO in a crucible to ~1800 ° C, using low-pressure argon gas discharge to ionize atoms, and bombarding the ionized MgO film with energetic electrons, so that MgO is deposited A film is formed on the surface of the carbon nanotube, and the thickness of the coating is controlled at 10-50nm. After the coating...

Embodiment 3

[0040] This embodiment relates to an ultra-light and high elastic modulus carbon nanotube reinforced magnesium-lithium matrix composite material, the mass percent of each component of the composite material is: Li 12%, Al 1%, Zn 0.5%, Sc 0.2% , carbon nanotube C 2.5%, and the balance is Mg.

[0041] This embodiment relates to a method for preparing an ultra-light and high-elastic-modulus carbon nanotube-reinforced magnesium-lithium-based composite material. The process includes the following steps: plating TiB on multi-walled carbon nanotubes with calculated addition amount 2 treatment, TiB plating 2 Treatment, coating treatment adopts the method of physical vapor deposition, using ion plating equipment, TiB 2 Put it in a crucible and heat it to ~2000°C, use low-pressure argon discharge to ionize the atoms, and bombard the ionized TiB with energetic electrons 2 membrane material, thus making the TiB 2 It is deposited on the surface of carbon nanotubes to form a film, and th...

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Abstract

The invention discloses an ultra-light and high elastic modulus carbon nanotube reinforced magnesium-lithium composite material and a preparation method; its components are: Li 9-16%, Zn 0.5-2%, Al 0.5-2%, Sc 0.02-0.2 %, carbon nanotube C 0.1-2.5%, and the balance is Mg. During the preparation, the carbon nanotubes are coated; the coated carbon nanotubes, magnesium chips and stearic acid are mixed and ball-milled and pressed into prefabricated blocks; under the protection of argon, the metal raw materials are melted to obtain alloy liquid, and the melt is stirred at a low speed; Cool down to near the liquidus temperature of the melt, add prefabricated blocks during rapid mechanical stirring; heat up to the casting temperature after stirring, and cast. The invention solves the problems of excessive reaction of Li and C and poor dispersion of carbon nanotubes in the matrix during the preparation process, and enables the carbon nanotubes protected by the coating to be stably and uniformly dispersed in the matrix; the obtained carbon nanotube-reinforced magnesium-lithium composite material Low density, high modulus of elasticity and strength.

Description

technical field [0001] The invention belongs to the field of metal-based composite materials, and in particular relates to an ultra-light and high-elastic-modulus carbon nanotube-reinforced magnesium-lithium composite material and a preparation method thereof. Background technique [0002] As the lightest metal structural material, magnesium-lithium alloy has broad application prospects in aerospace, weaponry and other fields that urgently need lightweight. However, the low elastic modulus is one of the bottlenecks limiting the application of Mg-Li alloys. For components that determine the structure, the modulus of elasticity is an important factor that determines their stiffness. The rigidity of the components is not enough, and it is prone to instability and even catastrophic accidents. Therefore, improving the elastic modulus of magnesium-lithium alloys is one of the key ways to expand the application range of magnesium-lithium alloys. [0003] According to the mixing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C23/00C22C1/02C22C1/10C23C14/30C23C14/06C23C14/32C23C14/08
CPCC22C23/00C22C1/1015C22C1/1036C23C14/30C23C14/0682C23C14/32C23C14/081C23C14/067C22C1/1047
Inventor 吴国华冀浩刘文才丁德华廖光澜
Owner SHANGHAI JIAOTONG UNIV
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