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Preparation method of nano clay reinforced carbon/carbon composite

A carbon composite material and nanoclay technology, applied in the field of carbon/carbon composite material preparation, can solve the problems of long preparation period and high cost, and achieve the effects of short preparation period, quick effect and simple process

Active Publication Date: 2014-07-16
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to improve the mechanical properties of carbon / carbon composite materials and overcome the shortcomings of long preparation period and high cost of traditional carbon / carbon composite materials, the present invention provides a low-cost, simple and fast preparation of high-strength nano-clay reinforced carbon / carbon Preparation method of composite material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Put clay and pitch with a mass ratio of 1:4 into an aqueous solution containing 0.5 wt% of methylcellulose, and stir at high speed for 2 hours to obtain 150ml of a uniform dispersion, the content of which is 12 wt% of pitch in the dispersion.

[0026] Step 2: Soak 20g of PAN-based continuous carbon fiber (T300) after desizing on the surface in the uniform dispersion prepared in step 1. After soaking for 1 hour, take out the fiber from the dispersion, arrange it in a prefabricated layer, and let it dry naturally After drying, a carbon / carbon composite material preform is obtained, and the fiber content in the final preform is detected to be 50wt%.

[0027] Step 3: Cut the prefabricated body obtained in step 2 into 50*50mm, stack them into corresponding graphite molds, and put them into a hot-pressing device for hot-pressing treatment. The heating program is: from room temperature (20°C) to 300°C, 5°C / min, pressure 2MPa; 300 to 600°C, 3°C / min, pressure 20MPa; 600 ...

Embodiment 2

[0029] Step 1: Put clay and pitch with a mass ratio of 1:5 into an aqueous solution containing 3% hydroxyethyl cellulose, and stir at high speed for 3 hours to obtain 200ml of a uniform dispersion, the content of which is 10wt% of pitch in the dispersion.

[0030] Step 2: Soak 26g of mesophase pitch-based continuous carbon fibers (Thornel P-25X) after surface desizing in the uniform dispersion prepared in step 1. After soaking for 3 hours, take the fibers out of the dispersion and arrange them in a prefabricated After the body layer is dried naturally, a carbon / carbon composite material prefabricated body is obtained. The fiber content in the final preform was detected to be 52wt%.

[0031] Step 3: Cut the prefabricated body obtained in step 2 into 50*50mm, stack them into corresponding graphite molds, and put them into a hot-pressing device for hot-pressing treatment. The heating program is: from room temperature (20°C) to 300°C, 10°C / min, 1MPa; 300 to 600°C, 5°C / min, pressu...

Embodiment 3

[0033] Step 1: Put clay and pitch with a mass ratio of 1:3.5 into an aqueous solution containing 5wt% hydroxyethyl cellulose, and stir at high speed for 3 hours to obtain 200ml of a uniform dispersion, the content of which is 7wt% in pitch.

[0034] Step 2: Soak 22g of PAN-based continuous carbon fiber (T700) after desizing on the surface in the uniform dispersion prepared in step 1. After soaking for 5 hours, take the fiber out of the dispersion and arrange it in a prefabricated layer at 80°C After being dried under the hood, the carbon / carbon composite material prefabricated body is obtained. The fiber content in the final preform was detected to be 55wt%.

[0035] Step 3: Cut the prefabricated body obtained in step 2 into 100*100mm, stack them into corresponding graphite molds, and put them into a hot-pressing device for hot-pressing treatment. The heating program is: from room temperature (20°C) to 300°C, 8°C / min, pressure 2MPa; 300 to 600°C, 2.5°C / min, pressure 10MPa; 60...

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Abstract

The invention discloses a preparation method of nano clay reinforced carbon / carbon composite, which comprises the steps of dispersing clay and asphalt in dispersant-containing water for stirring to prepare uniform dispersion liquid, immersing continuous carbon fiber in the dispersion liquid and then naturally airing or drying at low temperature to prepare a composite prefabricated part, and stacking the prefabricated part for hot pressing to obtain the nano clay reinforced carbon / carbon composite. The preparation method has the advantages of low cost, simplicity, rapidness and high preparation strength.

Description

technical field [0001] The invention belongs to a preparation method of a carbon / carbon composite material, in particular to a preparation method of a nano-clay reinforced carbon / carbon composite material. technical background [0002] Carbon / carbon composite material is a composite material of carbon fiber reinforced carbon matrix, which has excellent characteristics such as light weight, corrosion resistance, high strength, high modulus, good electrical and thermal conductivity, good friction characteristics and excellent high temperature stability. In the past few decades, it has emerged as a very important structural and functional material in the field of aerospace. At present, it has gradually expanded its application to various industries such as nuclear energy, electronics, machinery, metallurgy, medical treatment, automobiles, and sporting goods. However, its complex manufacturing process, high technical difficulty, and long preparation cycle (the densification cyc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83
Inventor 高晓晴郭全贵孔垂周
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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