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A kind of surface modification method of carbon/carbon composite material

A carbon composite material and surface modification technology, applied in the field of material surface modification, can solve the problems of shedding, low interface bonding strength, insufficient interface bonding strength, etc., and achieve the effects of enhancing cohesion, promoting chemical bonding, and improving interface bonding strength.

Active Publication Date: 2020-11-20
无锡博智复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the interfacial bonding strength between the modified coating and carbon / carbon composites in the above literature is generally low, which may lead to peeling and peeling of the modified coating, thereby damaging its surface modification effect.
Aiming at the problem of insufficient interfacial bonding strength between the modified coating and the carbon / carbon composite matrix

Method used

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  • A kind of surface modification method of carbon/carbon composite material
  • A kind of surface modification method of carbon/carbon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) The carbon / carbon composite material was ultrasonically cleaned with acetone, absolute ethanol, and deionized water in sequence, and the sample obtained after drying was marked as A;

[0027] (2) disperse graphene oxide into water according to the concentration of 0.1g / L and stir evenly to obtain liquid B;

[0028] (3) Soak A completely in B for 24 hours, take it out and dry it to get C;

[0029] (4) Graphite powder and silicon powder are evenly mixed according to the mass ratio of 1:4, mixed with a planetary ball mill for 2 hours, and powder D is obtained after drying;

[0030] (5) Put C and powder D into a graphite crucible, wherein powder D completely wraps C, put the graphite crucible into a vacuum high-temperature furnace, heat up to 2000°C at a heating rate of 5°C after vacuuming, and keep it for 1 hour Naturally cool to room temperature, take out the sample, ultrasonically clean it with water and dry it, and the obtained sample is marked as E;

[0031] (6) ...

Embodiment 2

[0037] (1) The carbon / carbon composite material was ultrasonically cleaned with acetone, absolute ethanol, and deionized water in sequence, and the sample obtained after drying was marked as A;

[0038] (2) disperse graphene oxide into water according to the concentration of 0.3g / L and stir evenly to obtain liquid B;

[0039] (3) Soak A completely in B for 48 hours, take it out and dry it to get C;

[0040] (4) Graphite powder and silicon powder are uniformly mixed according to the mass ratio of 1:8, mixed with a planetary ball mill for 4 hours, and powder D is obtained after drying;

[0041] (5) Put C and powder D into a graphite crucible, wherein powder D completely wraps C, put the graphite crucible into a vacuum high-temperature furnace, heat up to 2200°C at a heating rate of 10°C after vacuuming, and keep it for 2 hours Naturally cool to room temperature, take out the sample, ultrasonically clean it with water and dry it, and the obtained sample is marked as E;

[0042]...

Embodiment 3

[0048] (1) The carbon / carbon composite material was ultrasonically cleaned with acetone, absolute ethanol, and deionized water in sequence, and the sample obtained after drying was marked as A;

[0049] (2) disperse graphene oxide into water according to the concentration of 0.2g / L and stir evenly to obtain liquid B;

[0050] (3) Soak A completely in B for 36 hours, take it out and dry it to get C;

[0051] (4) Graphite powder and silicon powder are uniformly mixed according to the mass ratio of 1:6, mixed with a planetary ball mill for 3 hours, and powder D is obtained after drying;

[0052] (5) Put C and powder D into a graphite crucible, wherein powder D completely wraps C, put the graphite crucible into a vacuum high-temperature furnace, heat up to 2100°C at a heating rate of 8°C after vacuuming, and keep warm for 1.5h After cooling down to room temperature naturally, take out the sample, ultrasonically clean it with water and dry it, and the obtained sample is marked as ...

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Abstract

The invention relates to a carbon / carbon composite surface modification method which comprises the following steps of firstly, preparing a C-Si-SiC phase structure on the surface of a carbon / carbon composite to be used as a transition structure of the carbon / carbon composite and a subsequent CaP phase; secondly, constructing an ultrathin flake carbon layer on the surface of the C-Si-SiC phase structure to be used as a reinforcing phase of the subsequent CaP phase; and thirdly, grafting oxygen-containing functional groups to the ultrathin flake carbon layer to be used for chemical bonding between the ultrathin flake carbon layer and the CaP phase, then preparing a velvet-shaped CaP which is capable of forming a self-reinforcing interlocking structure, and forming a C-Si-SiC-C-CaP compositecoating to realize surface modification of the carbon / carbon composite. A maximum value of an interfacial bonding strength of a prepared C-Si-SiC-C-CaP modified coating and a carbon / carbon composite matrix is 16.26MPa and is increased by 159.3 percent compared with a maximum value of an interfacial bonding strength reported by the background art.

Description

technical field [0001] The invention belongs to a method for modifying the surface of a material, and relates to a method for modifying the surface of a carbon / carbon composite material. Background technique [0002] Carbon / carbon composites are mainly composed of carbon elements, which inherit the inherent biocompatibility of carbonaceous materials, and also have the characteristics of high strength, high toughness and good fatigue resistance, especially its elastic modulus is close to that of human bones , is a bone repair and bone replacement material with broad application prospects. However, the surface of carbon / carbon composites is biologically inert, not biologically active, and unable to form chemical bonds with human bone tissue, which may lead to loosening of carbon / carbon composite bone implants and affect their service life. Therefore, it is necessary to modify the surface of carbon / carbon composites to endow them with surface bioactivity, thereby promoting the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/89
CPCC04B41/009C04B41/52C04B41/89C04B35/83C04B41/5059C04B41/5001C04B41/5096C04B41/455C04B41/4564C04B41/5015
Inventor 张磊磊管科杰李贺军宋强
Owner 无锡博智复合材料有限公司
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