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Method for preparing carbon/carbon composite material profile by slurry casting

A carbon composite material and slurry technology, which is applied in the field of materials for preparing complex components, can solve the problems of long preparation period and high preparation cost, and achieve the effects of avoiding cutting or cutting operations, low preparation cost and low gas permeability

Active Publication Date: 2014-12-03
SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of long preparation period and high preparation cost in the prior art, the present invention aims to provide a method for preparing carbon / carbon composite profiles by slurry casting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Mix phenolic resin and chopped carbon fiber (fiber length 2mm-5mm) uniformly at a mass ratio of 5:5 to make a mixture; fully mix the mixture with water to make a slurry; use a ball mill at a speed of 150 rpm Ball mill for 5 hours to ensure that the components in the slurry are mixed evenly; pour the slurry prepared in the above steps into a gypsum mold made according to the mesophase heat exchanger to remove water;

[0021] Put the chopped carbon fiber reinforced resin body prepared in the above steps into a muffle furnace for pre-oxidation treatment. During pre-oxidation, heat up to 160°C at 5°C / day and hold for 10 hours; heat up from 160°C to 250°C at a rate of 10°C / day and hold for 10 hours; then cool down at 20°C / h;

[0022] Put the material after the pre-oxidation treatment in the above steps into a carbonization furnace for carbonization. During carbonization, heat up to 250°C at a heating rate of 50°C / h, and hold for 2 hours; heat up from 250°C to 450°C at a hea...

Embodiment 2

[0027] Mix phenolic resin and chopped carbon fiber (fiber length 2mm-5mm) uniformly at a mass ratio of 4:6 to make a mixture; fully mix the mixture with water to make a slurry; use a ball mill at a speed of 150 rpm Ball mill for 5 hours to ensure that the components in the slurry are mixed evenly; pour the slurry prepared in the above steps into a gypsum mold made according to the mesophase heat exchanger to remove water;

[0028] Put the chopped carbon fiber reinforced resin body prepared in the above steps into a muffle furnace for pre-oxidation treatment. During pre-oxidation, heat up to 160°C at 5°C / day and hold for 10 hours; heat up from 160°C to 250°C at a rate of 10°C / day and hold for 10 hours; then cool down at 20°C / h;

[0029] Put the material after the pre-oxidation treatment in the above steps into a carbonization furnace for carbonization. During carbonization, heat up to 250°C at a heating rate of 50°C / h and hold for 2 hours; heat up from 250°C to 500°C at a heat...

Embodiment 3

[0034] Mix phenolic resin and chopped carbon fiber (fiber length 2mm-5mm) uniformly at a mass ratio of 3:7 to make a mixture; fully mix the mixture with water to make a slurry; use a ball mill at a speed of 150 rpm Ball mill for 5 hours to ensure that the components in the slurry are evenly mixed;

[0035] Pour the slurry prepared in the above steps into the gypsum mold made according to the mesophase heat exchanger, and remove the water;

[0036] Put the chopped carbon fiber reinforced resin body prepared in the above steps into a muffle furnace for pre-oxidation treatment. During pre-oxidation, heat up to 160°C at 5°C / day and hold for 10 hours; heat up from 160°C to 250°C at a rate of 10°C / day and hold for 10 hours; then cool down at 20°C / h;

[0037] Put the material after the pre-oxidation treatment in the above steps into a carbonization furnace for carbonization. During carbonization, heat up to 250°C at a heating rate of 50°C / h, and hold for 2 hours; heat up from 250°C...

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Abstract

The invention relates to a method for preparing a carbon / carbon composite material profile by slurry casting. The method comprises the following steps: 1, mixing phenolic resin with chopped carbon fiber so as to prepare a mixed material, and mixing the mixed material with water so as to prepare slurry, wherein the mass percentage of the chopped carbon fiber in the mixed material is no greater than 70%; 2, pouring the slurry into a plaster mold, and removing the water in the slurry so as to obtain a blank; 3, performing preoxidation treatment on the blank so as to obtain oxysome; 4, performing carbonization treatment on the oxysome so as to obtain a carbonized body; and 5, performing densification treatment on the carbonized body so as to obtain the carbon / carbon composite material profile. The mixed material and water are prepared into the slurry, the slurry is further introduced into the plaster mold, and the moisture in the slurry is adsorbed and removed by plaster, so that the blank is rapidly obtained; after the blank is pre-oxidized, carbonized and densified, the profile of an approximate net size is obtained; the profile can be made into a component without subsequent machining or only slight machining is needed, and thus the method is particularly applicable to preparation of the carbon / carbon composite material profile which is complex in structure.

Description

technical field [0001] The invention relates to a material for preparing complex components, in particular to a method for preparing a carbon / carbon composite profile by slurry casting. Background technique [0002] Carbon / carbon composite materials have a series of excellent properties such as excellent high-temperature mechanical properties, good thermal shock resistance, high thermal conductivity, low expansion coefficient, and good chemical stability, so they are widely used in aviation, aerospace, military industry, nuclear energy, etc. field. At present, the mature processes for preparing carbon / carbon composite materials mainly include chemical vapor deposition, resin or pitch impregnation-carbonization-graphitization. The prefabricated body of carbon / carbon composite materials mainly has one-dimensional, two-dimensional, three-dimensional and multi-dimensional carbon fiber fabrics; the matrix of carbon / carbon composite materials mainly includes pyrolytic carbon, res...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/622
Inventor 张东生夏汇浩周兴泰杨新梅宋金亮
Owner SHANGHAI INST OF APPLIED PHYSICS - CHINESE ACAD OF SCI
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