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Silicon carbide/graphene bionic composite material for bulletproof armor and preparation method thereof

A technology of biomimetic composite materials and composite materials, which is applied in the field of silicon carbide/graphene biomimetic composite materials for bulletproof armor and its preparation, can solve the problem that the mechanical properties of composite materials cannot be fully utilized, and fracture toughness and impact toughness are resistant to multiple impacts Performance is difficult to be significantly improved and other issues

Active Publication Date: 2020-10-27
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantage of the above silicon carbide / graphene composite material and its preparation method is that the microstructure of the composite material is isotropic, and the graphene nanosheets are randomly oriented in the silicon carbide matrix.
On the one hand, this prevents the mechanical properties of composite materials from being fully utilized along the direction of actual use; on the other hand, the propagation of cracks in composite materials cannot be effectively hindered by graphene sheets, so the fracture toughness, impact toughness and It is difficult to significantly improve the resistance to multiple impacts

Method used

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  • Silicon carbide/graphene bionic composite material for bulletproof armor and preparation method thereof
  • Silicon carbide/graphene bionic composite material for bulletproof armor and preparation method thereof
  • Silicon carbide/graphene bionic composite material for bulletproof armor and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] In this example, a silicon carbide / graphene biomimetic composite material for bulletproof armor with a graphene volume fraction of 1% was prepared. The raw materials used mainly include α-phase silicon carbide powder (average particle size 50nm), β-phase silicon carbide powder (average particle size 50nm), graphene nanosheets (average sheet diameter 20μm, average thickness 3nm), yttrium oxide powder (average particle size 30nm), alumina powder (average particle size 20nm), deionized water, hydroxypropyl methylcellulose powder (average particle size 180μm), polyvinyl alcohol, sodium lauryl sulfate and Darvan CN dispersant, Darvan CN The dispersant is a slurry dispersant produced by R.T.Vanderbilt (R.T.Vanderbilt). Concrete preparation process is as follows:

[0033] 1) Weigh 500g of deionized water, 0.72g of graphene nanosheets and 3.5g of sodium lauryl sulfate in sequence and add them to a 2L ball mill jar. After stirring evenly, use an ultrasonic disperser to disperse...

Embodiment 2

[0038] In this embodiment, the silicon carbide / graphene biomimetic composite material for bulletproof armor with a graphene volume fraction of 3%. The raw material used is identical with embodiment 1. Concrete preparation process is as follows:

[0039] 1) The difference between this step and step 1 in Example 1 is that the addition of graphene is 2.16g, the addition of sodium lauryl sulfate is 4.5g, and the addition of yttrium oxide powder is 4.97g, the added amount of alumina powder was 3.73g, and the added amount of polyvinyl alcohol was 3g.

[0040] 2) This step is the same as step 2) in Example 1.

[0041] 3) This step is the same as step 3) in Example 1.

[0042] Through the above-mentioned process, it is possible to prepare a silicon carbide / graphene biomimetic composite material for bulletproof armor with a graphene volume fraction of 3%, and its microstructure is shown in figure 2 . Depend on figure 2 It can be seen that the graphene in the composite material ...

Embodiment 3

[0044] In this example, a silicon carbide / graphene biomimetic composite material for bulletproof armor with a graphene volume fraction of 0.5% was prepared. The raw material used is identical with embodiment 1. Concrete preparation process is as follows:

[0045] 1) The difference between this step and step 1) in Example 1 is that the addition of graphene is 0.36g, the addition of sodium lauryl sulfate is 2g, and the addition of yttrium oxide powder is 7.79g g, the addition amount of alumina powder is 5.85g, the addition amount of polyvinyl alcohol is 0.5g, the addition amount of α-phase silicon carbide powder is 7g, and the addition amount of β-phase silicon carbide powder is 93g.

[0046] 2) This step is the same as step 2) in Example 1.

[0047] 3) This step is the same as step 3) in Example 1.

[0048] Through the above-mentioned process, silicon carbide / graphene biomimetic composite material for bulletproof armor with a graphene volume fraction of 0.5% can be prepared,...

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Abstract

The invention relates to the field of composite materials for bulletproof armor, particularly to a silicon carbide / graphene bionic composite material for bulletproof armor, and a preparation method thereof, wherein the composite material is composed of graphene with a volume percentage of 0.3-6% and silicon carbide, and graphene lamellas are preferentially and directionally distributed in a silicon carbide matrix microscopically. The preparation method of the composite material comprises the following steps: preparing mixed slurry of graphene and silicon carbide, then carrying out freeze casting and vacuum freeze drying treatment on the slurry to obtain a porous blank with an oriented lamellar structure, then compressing the blank along the direction vertical to the lamellar structure, andfinally carrying out organic matter removal treatment and sintering densification to obtain the silicon carbide / graphene composite material. According to the invention, the composite material is highin strength, high in hardness and simple in production process, has good fracture toughness, impact toughness and repeated impact resistance, can effectively improve the protection effect and durability of the bulletproof armor, and has a considerable application prospect.

Description

technical field [0001] The invention relates to the field of composite materials for bulletproof armor, in particular to a silicon carbide / graphene biomimetic composite material for bulletproof armor and a preparation method thereof. Background technique [0002] Bulletproof armor is a kind of protective device that can absorb the kinetic energy of dissipated warheads and fragments and prevent penetration, thereby effectively protecting the human body and the protected parts of equipment. It can effectively reduce the casualty rate of one's own soldiers and preserve vitality to the greatest extent. Realizing the toughness and lightweight of bulletproof armor materials can effectively improve the protective effect and service life of bulletproof armor, and at the same time reduce the load of soldiers and equipment, so it has important practical significance. As an important bulletproof armor material, silicon carbide ceramics have a low density (the density is about 3.2g / cm ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565
CPCC04B35/565C04B2235/3217C04B2235/3225C04B2235/3232C04B2235/3244C04B2235/3418C04B2235/3821C04B2235/3865C04B2235/425C04B2235/77C04B2235/96
Inventor 刘增乾张立龙张逸宁张健张哲峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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