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Preparation method of low-cost ultra-large and ultra-thick carbon/carbon composite material

A carbon composite material, low-cost technology, applied in the field of preparation of low-cost ultra-large and ultra-thick carbon/carbon composite materials, can solve the problems of large-scale production process control difficulty, high scrap rate, product deformation, etc.

Pending Publication Date: 2021-06-08
HUNAN BOYUN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, carbon / carbon composite materials generally have a long production cycle, and it is difficult to control the mass production process
Especially in the production process of ultra-large and ultra-thick (1000mm×300mm×150mm or more) carbon / carbon composite materials, quality problems such as product deformation, delamination, and cracks are prone to occur during high-temperature heat treatment, resulting in high scrap rates and high production costs.

Method used

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  • Preparation method of low-cost ultra-large and ultra-thick carbon/carbon composite material
  • Preparation method of low-cost ultra-large and ultra-thick carbon/carbon composite material
  • Preparation method of low-cost ultra-large and ultra-thick carbon/carbon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] a. Prepare 20 carbon fiber prefabricated bodies. The carbon fiber prefabricated body is a 2D needle-punched structure. A layer of PANCF non-weft cloth and a layer of PANCF non-weft cloth mesh are alternately laid, and the non-weft cloth is alternately laid at 0° / 90°. Made by continuous needle punching; the size of the carbon fiber preform is 1380mm×400mm×200mm, and the density is 0.38g / cm 3 ;

[0041] b. Graphitize the carbon fiber prefabricated body to obtain a carbon fiber green body; put the carbon fiber prefabricated body into a heat treatment furnace, first evacuate, raise the temperature to 2000°C and keep it warm for 2 hours, during which argon gas is filled, and the furnace pressure is 0.2-3KPa, Graphitize the carbon fiber preform, and then cool it naturally with the furnace;

[0042] c. Carry out impregnation and curing treatment, carbonization treatment, high temperature heat treatment and mechanical processing on the carbon fiber green body in sequence;

[...

Embodiment 2

[0051] a. Prepare 40 carbon fiber prefabricated bodies. The carbon fiber prefabricated body is a 2D needle-punched structure. A layer of PANCF non-weft cloth and a layer of PANCF non-weft cloth mesh are alternately laid, and the non-weft cloth is alternately laid at 0° / 90°. Continuous needle punching; the size of the carbon fiber preform is 1250mm×350mm×180mm, and the density is 0.45g / cm 3 ;

[0052] b. Graphitize the carbon fiber prefabricated body to obtain a carbon fiber green body; put the carbon fiber prefabricated body into a heat treatment furnace, first evacuate, raise the temperature to 2000°C and keep it warm for 2 hours, during which argon gas is filled, and the furnace pressure is 0.2-3KPa, Graphitize the carbon fiber preform, and then cool it naturally with the furnace;

[0053] c. Carry out impregnation and curing treatment, carbonization treatment, high temperature heat treatment and mechanical processing on the carbon fiber green body in sequence;

[0054] Fu...

Embodiment 3

[0062] a. Prepare 60 pieces of carbon fiber prefabricated body. The carbon fiber prefabricated body is a 2D needle-punched structure. A layer of PANCF non-weft cloth and a layer of PANCF non-weft cloth mesh tire are alternately laid, and the non-weft cloth is alternately laid at 0° / 90°. It is made by continuous needle punching; the size of the carbon fiber preform is 1020mm×310mm×160mm, and the volume density of the felt body is 0.50g / cm 3 ;

[0063] b. Graphitize the carbon fiber prefabricated body to obtain a carbon fiber green body; put the carbon fiber prefabricated body into a heat treatment furnace, first evacuate, raise the temperature to 2000°C and keep it warm for 2 hours, during which argon gas is filled, and the furnace pressure is 0.2-3KPa, Graphitize the carbon fiber preform, and then cool it naturally with the furnace;

[0064] c. Carry out impregnation and curing treatment, carbonization treatment, high temperature heat treatment and mechanical processing on th...

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Abstract

The invention provides a preparation method of a low-cost ultra-large and ultra-thick carbon / carbon composite material. The preparation method comprises the following steps: a, preparing a carbon fiber preform; b, carrying out graphitization treatment on the carbon fiber preform to obtain a carbon fiber blank; c, sequentially carrying out dipping curing treatment, carbonization treatment, high-temperature heat treatment and machining treatment on the carbon fiber blank; d, repeating the step c until the density of the carbon fiber green body reaches a target value to obtain a primary finished product; and e, carrying out finish machining on the primary finished product to obtain a finished product. The method is simple in process and low in production cost, the prepared product is high in percent of pass, the production cost is low, and low-cost batch preparation of the ultra-large and ultra-thick carbon / carbon composite material can be achieved.

Description

technical field [0001] The invention relates to the technical field of composite material preparation and processing, in particular to a method for preparing a low-cost super-large and super-thick carbon / carbon composite material. Background technique [0002] Carbon / carbon composite materials have the advantages of low density, high strength, high specific modulus, high thermal conductivity, low expansion coefficient, good friction performance, good thermal shock resistance, and high dimensional stability. They are often used in high temperature ablation materials, High-temperature structural materials have good application prospects in aviation, aerospace, nuclear energy, medicine and other fields, and can be used in photovoltaics, rail transit and other civil materials and components. [0003] In the prior art, carbon / carbon composite materials generally have a long production cycle, and it is difficult to control the mass production process. Especially in the production...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/84C04B35/64
CPCC04B35/83C04B35/64C04B2235/6562C04B2235/6567C04B2235/77C04B2235/48C04B2235/96C04B2235/95C04B2235/9607
Inventor 左劲旅熊杰徐惠娟杨波江丙武
Owner HUNAN BOYUN NEW MATERIALS
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