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Preparation method of rare earth toughening carbon/carbon composite material

A carbon composite material and rare earth material technology, which is applied in the field of carbon/carbon composite material preparation, can solve the problems of long densification period, complicated process, unfavorable material cost, etc., to improve fracture toughness and mechanical strength, reduce Densification cycle, the effect of promoting rapid deposition

Active Publication Date: 2013-06-05
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

This method has many control parameters, complex process and long densification cycle, which is not conducive to the reduction of material cost

Method used

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  • Preparation method of rare earth toughening carbon/carbon composite material
  • Preparation method of rare earth toughening carbon/carbon composite material
  • Preparation method of rare earth toughening carbon/carbon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1: step one, the density is 0.40g / cm 3 The carbon fiber prefabricated body was ultrasonically cleaned with absolute ethanol for 30 minutes to remove impurities adhering to the carbon fiber, and the carbon fiber prefabricated body was taken out and dried in an oven at 100°C for later use;

[0018] Step 2, take by weighing 5wt.% lanthanum chloride (LaCl 3 ) and 95wt.%C 2 h 5 OH is mixed into a mixed solution, the carbon fiber preform treated in step 1 is immersed in the mixed solution, ultrasonically oscillated for 2 hours, the carbon fiber preform is taken out and placed in an oven for 6 hours at 80°C;

[0019] Step 3, take by weighing the carbon fiber prefabricated body weight that step 2 handles, calculate lanthanum chloride (LaCl 3 ) content, if lanthanum chloride (LaCl 3 ) content does not reach 5(±0.5)wt.%, then repeat step two, step three, until lanthanum chloride (LaCl 3 ) content reaches a predetermined value of 5 (±0.5) wt.%;

[0020] Step 4. Pl...

Embodiment 2

[0021] Embodiment 2: step one, the density is 0.40g / cm 3 The carbon fiber prefabricated body was ultrasonically cleaned with absolute ethanol for 25 minutes to remove impurities adhering to the carbon fiber, and the carbon fiber prefabricated body was taken out and put into an oven for drying at 110°C for later use;

[0022] Step 2, take by weighing 10wt.% cerium chloride (CeCl 3 ) and 90wt.%C 2 h 5 OH is mixed into a mixed solution; the carbon fiber preform prepared in step 1 is immersed in the mixed solution, ultrasonically oscillated for 3 hours, and the carbon fiber preform is taken out and dried in an oven at 90°C for 5 hours;

[0023] Step 3, take by weighing the carbon fiber prefabricated body weight that step 2 handles, calculate rare earth cerium chloride (CeCl 3 ) content, if cerium chloride (CeCl 3 ) content does not reach 10(±0.5)wt.%, then repeat step two, step three, until cerium chloride (CeCl 3 ) content reaches a predetermined value of 10 (±0.5) wt.%;

...

Embodiment 3

[0025] Embodiment 3: step one, the density is 0.40g / cm 3 The carbon fiber prefabricated body was ultrasonically cleaned with absolute ethanol for 35 minutes to remove impurities adhering to the carbon fiber, and the carbon fiber prefabricated body was taken out and put into an oven for drying at 120°C for later use;

[0026] Step 2, weigh 8wt.% lanthanum chloride (LaCl 3 ) and 92wt.%C 2 h 5 OH is mixed into a mixed solution, the carbon fiber preform prepared in step 1 is immersed in the mixed solution, ultrasonically oscillated for 4 hours, the carbon fiber preform is taken out and put into an oven for 4 hours at 100°C;

[0027] Step 3, take by weighing the carbon fiber prefabricated body weight that step 2 handles, calculate lanthanum chloride (LaCl 3 ) content, if lanthanum chloride (LaCl 3 ) content does not reach 8(±0.5)wt.%, then repeat step two, step three, until lanthanum chloride (LaCl 3 ) content reaches a predetermined value of 8 (±0.5) wt.%;

[0028] Step 4. P...

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Abstract

The invention discloses a preparation method of a rare earth toughening carbon / carbon composite material to solve the technological problem of long densification period by present preparation methods of a high strength and high toughness carbon / carbon composite material. The technical scheme is to add a rare earth material into a carbon fiber prefabricated part and use the rare earth material to accelerate cracking and condensation reaction of a precursor and further promote rapid deposition of the carbon matrix. By the adoption of the preparation method provided by the invention, the preparation time is reduced from 80-100 hours by the background art to 15-20 hours; the densification period of the high strength and high toughness carbon / carbon composite material is reduced; and the cost is effectively decreased. In the meanwhile, as the carbon matrix-carbon fiber interface and the carbon matrix microstructure can be modified by the doping of the rare earth material, the fracture toughness and mechanical strength of the carbon / carbon composite material in deposited state are raised.

Description

technical field [0001] The invention relates to a preparation method of a carbon / carbon composite material, in particular to a preparation method of a rare earth toughened carbon / carbon composite material. Background technique [0002] Carbon / carbon composite materials, that is, carbon fiber reinforced carbon matrix composite materials, combine the essential properties of high temperature resistance of carbon materials and the excellent mechanical properties of composite materials. They have light specific gravity, high specific strength and thermal conductivity, good thermal stability, and With the characteristics of ablation, high temperature mechanics and excellent friction properties, as an advanced composite material integrating high temperature thermal structure and function, it has been widely used in the fields of aviation, aerospace, nuclear energy and transportation. The fracture behavior of carbon / carbon composites is the key to the normal performance of their mec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/83C04B35/622
Inventor 李克智邓海亮李贺军李鑫郭领军
Owner 无锡博智复合材料有限公司