Method for enhancing strength of carbon/carbon composite material

A technology of carbon composite materials and composite materials, applied in the field of carbon/carbon composite materials, to achieve the effects of improving interface bonding, simple and easy control of the process, and avoiding secondary formation

Active Publication Date: 2015-09-30
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for improving the strength of carbon / carbon composite materials in order to avoid the shortcomings of the above-mentioned prior art, and aims to solve the interface compatibility caused by introducing nanoclay into carbon / carbon composite materials question

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Weigh 4g of attapulgite and 2g of microcrystalline cellulose after grinding, add it to 80mL deionized water and magnetically stir and mix for 30min, then weigh 2.968g of ferrous ammonium sulfate hexahydrate into the solution and stir for about 5min, then pour the solution into 100ml Hydrothermal reaction at 220°C for 24 hours in a hydrothermal reaction kettle. After the hydrothermal reaction, use deionized water and ethanol to alternately wash the sample to pH = 7, then dry and grind to obtain the attapulgite / carbon nanocomposite material;

[0031] 2. Weigh 4g of the carbon matrix precursor, including 3.2g of pitch and 0.8g of attapulgite / carbon nanocomposite. The asphalt was ground to a particle size of 30 μm, and a 0.05 wt % polyethylene oxide solution was prepared, and the attapulgite / carbon nanocomposite and ground asphalt were added to 50 mL of PEO dispersant solution and magnetically stirred for 2 h.

[0032] Weigh 2 g of carbon fiber, wash it with acetone ultr...

Embodiment 2

[0037] 1. Weigh 3g of attapulgite and 3g of ground microcrystalline cellulose and add it to 80ml deionized water with magnetic stirring for 30min, then weigh 2.968g of ferrous ammonium sulfate hexahydrate into the solution and stir for about 5min, then pour the solution into 100mL Hydrothermal reaction at 220°C for 24 hours in a hydrothermal reactor. After the hydrothermal reaction, wash the sample alternately with deionized water and ethanol to pH = 7, then dry and grind to obtain the attapulgite / carbon composite material;

[0038] 2. Weigh 4g of the carbon matrix precursor, in which the mass ratio of pitch to clay is 4:1, that is, 3.2g of pitch, and 0.8g of attapulgite / carbon composite material. The asphalt was ground to a particle size of 30 μm, and a 0.05 wt % polyethylene oxide solution was prepared, and the attapulgite / carbon composite material and ground asphalt were added to 50 mL of PEO dispersant solution and magnetically stirred for 2 h.

[0039] Weigh 2 g of carbo...

Embodiment 3

[0049] 1. Weigh 4g of halloysite and 2g of ground microcrystalline cellulose into 80mL of deionized water and stir for 30min, then weigh 2.968g of ferrous ammonium sulfate hexahydrate into the solution and stir for about 5min, then pour the solution into 100ml of water Hydrothermal reaction at 220°C for 24 hours in a thermal reactor. After the hydrothermal reaction, wash the sample alternately with deionized water and ethanol to pH = 7, then dry and grind to obtain the halloysite / carbon composite material;

[0050] 2. Weigh 4g of the carbon matrix precursor, in which the mass ratio of asphalt to clay is 4:1, that is, 3.2g of asphalt and 0.8g of halloysite / carbon composite material. The pitch was ground to a particle size of 30 μm, and a 0.05 wt % polyethylene oxide solution was prepared. The halloysite / carbon composite material and the ground pitch were added to 50 ml of PEO dispersant solution and stirred magnetically for 2 h.

[0051] Weigh 2 g of carbon fiber, wash it with...

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Abstract

The invention discloses a method for enhancing strength of a carbon/carbon composite material, which is characterized by comprising the following steps: adding a clay/carbon transition layer between a carbon fiber and a carbon matrix, and carrying out one-step hot pressing to convert the clay/carbon into ceramic/carbon, thereby finally obtaining the multiphase multiscale carbon/carbon-ceramic/carbon composite material. The biomass carbon source is carbonized into nano carbon to be supported onto the clay surface by a hydrothermal process so as to form the clay/carbon nano composite material, and the composite material is introduced into the carbon/carbon composite material, thereby achieving the goal of adding a carbon transition layer between the reinforcing agent clay and the carbon fiber/carbon matrix, further improving the interface combination in the carbon/carbon composite material and enhancing the strength of the material.

Description

1. Technical field [0001] The invention belongs to the technical field of carbon / carbon composite materials, and in particular relates to a method for improving defects in carbon fiber-reinforced carbon-based composite materials. 2. Background technology [0002] Carbon fiber is a fiber material with a carbon content of more than 90% that is close to pure carbon. Carbon / carbon composites are composite materials that use carbon fibers as structural materials to reinforce the carbon matrix. Because carbon / carbon has high specific strength, high specific modulus, good thermal conductivity and superior friction characteristics, and can maintain high strength and modulus under high temperature environment, carbon / carbon composite materials are widely used in aerospace field. There are many applications, and it is mainly used for friction materials. With the rapid development of carbon / carbon composite material research and development technology, its application has involved ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/80C04B35/83C04B35/622
Inventor 吴雪平王翀吴力伟吴玉程张先龙
Owner HEFEI UNIV OF TECH
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