Carbon/carbon composite material flat plate preparation method

A carbon composite material and flat plate technology, which is applied in the field of carbon/carbon composite material preparation from flat plates, can solve the problems of layered local bubbling, easy deformation of flat plates, affecting normal production, etc., and achieves enhanced flatness, short process cycle, interlayer High bonding strength

Inactive Publication Date: 2012-12-19
湖南省鑫源新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Carbon / carbon composite flat plates are prone to deformation, delamination and partial bubbling during use, which will affect normal production in severe cases

Method used

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  • Carbon/carbon composite material flat plate preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1) The fine-woven carbon fiber fabric and the short carbon fiber mesh are laminated alternately, and the upper and lower layers are fine-woven carbon fiber fabric;

[0032] 2) Arranging connecting reinforcement lines between the finely woven carbon fiber braid and the short carbon fiber mesh by needling to obtain an apparent density of 0.4 g / cm 3 carbon fiber needle-punched integral felt;

[0033] 3) Impregnating the carbon fiber needle-punched integral felt with resin, curing it at 240°C, and keeping it under pressure;

[0034] 4) The resin-impregnated and cured carbon fiber needle-punched monolithic felt was subjected to graphitization treatment at 2200°C, the holding time was 1.5h, and pressure was maintained to obtain a density of 0.80 g / cm 3 Carbon / carbon composite flat plate preform;

[0035] 5) Put the carbon / carbon composite flat plate preform into a chemical vapor deposition furnace and raise the temperature to 1000°C, feed in natural gas as carbon source gas...

Embodiment 2

[0041] 1) The fine-woven carbon fiber fabric and the short carbon fiber mesh are laminated alternately, and the upper and lower layers are fine-woven carbon fiber fabric;

[0042] 2) Arranging connecting reinforcing lines between the finely woven carbon fiber braid and the short carbon fiber mesh by needling to obtain an apparent density of 0.6g / cm 3 carbon fiber needle-punched integral felt;

[0043] 3) Impregnating the carbon fiber needle-punched integral felt with resin, curing it at 255°C, and keeping it under pressure;

[0044] 4) The resin-impregnated and cured carbon fiber needle-punched monolithic felt was subjected to graphitization treatment at 2300°C, the holding time was 2.5h, and pressure was maintained to obtain a density of 1.02 g / cm 3 Carbon / carbon composite slab preforms;

[0045] 5) Put the carbon / carbon composite flat plate preform into a chemical vapor deposition furnace and raise the temperature to 1200°C, feed propane as carbon source gas, hydrogen as d...

Embodiment 3

[0051] 1) The fine-woven carbon fiber fabric and the short carbon fiber mesh are laminated alternately, and the upper and lower layers are fine-woven carbon fiber fabric;

[0052] 2) Arranging connecting reinforcing lines between the finely woven carbon fiber braid and the short carbon fiber mesh by needling to obtain an apparent density of 0.95 g / cm 3 carbon fiber needle-punched integral felt;

[0053] 3) Impregnating the carbon fiber needle-punched integral felt with resin, curing it at 278°C, and keeping it under pressure;

[0054]4) The resin-impregnated and cured carbon fiber needle-punched integral felt was subjected to graphitization treatment at 2400°C, the holding time was 3.6h, and the pressure was kept to obtain a density of 1.10 g / cm 3 Carbon / carbon composite slab preforms;

[0055] 5) Put the carbon / carbon composite flat plate preform into a chemical vapor deposition furnace and raise the temperature to 1580°C, feed in propane as natural gas and hydrogen as dilu...

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Abstract

The invention discloses a carbon/carbon composite material flat plate preparation method, which comprises the following steps that 1) finely woven carbon fiber fabric and short carbon fiber nets are subjected to alternating lamination; 2) a carbon fiber needling integral felt is obtained in a needling mode; 3) resin dipping and curing are carried out; 4) graphitization treatment is carried out; and 5) chemical gas phase decomposition and density enhancement are carried out. The carbon/carbon composite material flat plate preparation method disclosed by the invention can be used for preparing carbon/carbon composite materials with good surface flatness and high interlayer combination degree.

Description

technical field [0001] The invention relates to a method for preparing a carbon / carbon composite material from a flat plate. Background technique [0002] Carbon / carbon composites, namely carbon fiber reinforced carbon matrix composites, are excellent thermal structural materials. It not only has excellent mechanical properties of composite materials, but also has special properties of carbon materials, such as: low density, high specific strength, high specific modulus, high thermal conductivity, low expansion coefficient, good thermal shock resistance and stable size Therefore, carbon / carbon composite flat plates and their processed parts are widely used in the field of thermal processing. [0003] In the prior art, the top plate and crucible cover plate of polysilicon ingot furnace mainly use carbon / carbon composite material flat plate, and the carbon / carbon composite material flat plate currently used is mainly made of plain carbon cloth or twill carbon cloth laminated....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B35/622
Inventor 姜勇
Owner 湖南省鑫源新材料股份有限公司
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