Preparation method of carbon/carbon composite material flat plate with carbide coating on surface

A carbon composite material and carbide technology, which is applied in the field of preparation of carbon/carbon composite material flat plates, can solve the problems of easy delamination, short service life, surface silicon corrosion, etc., and achieves high bonding strength between layers, improved service life, Good surface smoothness

Inactive Publication Date: 2013-08-07
HUNAN YOUYUAN MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a carbon / carbon composite flat plate with a carbide coating on the surface, so as to solve the problem of large deformation and easy separation of the commonly used carbon cloth laminated carbon / carbon composite flat plate. layer, local bubbling, surface silicon erosion and short service life etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0024] A. Alternately stack plain carbon cloth or twill carbon cloth and short carbon fiber mesh tires, and needle punch on a knitting machine to form a quasi-three-dimensional needle-punched integral felt. The size of the needle-punched felt plate is 1000×1000×9mm (length×width × thickness), the surface density is 0.45g / cm3;

[0025] B. Pre-press forming: the needle-punched integral felt obtained in step A is warm-pressed and pre-formed on a flat machine at a temperature of 180°C and a pressure of 120 MPa for 10 hours to obtain a flat pre-formed body with a density of 0.50 g / cm3 , the thickness is 6.5mm;

[0026] C. Densification by chemical vapor deposition: put the above-mentioned flat plate preform into a chemical vapor deposition furnace, raise the temperature to 1150°C, feed natural gas and hydrogen, and obtain a density of 1.35g / cm3 carbon / carbon composite flat plate;

[0027] D. High-temperature graphitization: the carbon / carbon composite material flat plate obtaine...

example 2

[0031] The temperature of the pre-compression forming step is 240°C, the pressure is 155MPa, and the time is 15 hours, and a flat plate preform with a density of 0.75g / cm3 is obtained; the densification time of the chemical vapor deposition densification step is 200 hours, and the density is 1.55g / cm3 carbon / carbon composite flat plate, all the other are the same as example 1.

example 3

[0033] The temperature of the pre-compression forming step is 210°C, the pressure is 135MPa, and the time is 12 hours, and the flat plate preform with a density of 0.60g / cm3 is obtained; the densification time of the chemical vapor deposition densification step is 180 hours, and the density is 1.50g / cm3. The charcoal / carbon composite flat plate of cm3, all the other are with example 1.

[0034] Plain carbon cloth, twill carbon cloth and short carbon fiber mesh tires are all supplied to our company after being made into quasi-three-dimensional needle-punched integral felt on its weaving machine by Jiangsu Hengli Technology Co., Ltd.

[0035] The chemical vapor deposition furnace and graphitization furnace are designed by our company and assembled from parts purchased in the market.

[0036] The lathes used for machining are ordinary lathes manufactured by Changsha Jinling Lathe Co., Ltd.

[0037] The flatbed machine is produced by Qingdao Guangyue Rubber Machinery Manufacturin...

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Abstract

The invention discloses a preparation method of a carbon / carbon composite material flat plate with a carbide coating on the surface. The preparation method is characterized by comprising the following steps of: A, alternately superposing plain carbon cloth or twilled carbon cloth with a short carbon fiber net blank and needling on a knitting machine to form quasi-three-dimensional needled integrated felt; B, performing warm-pressing preforming on the integrated felt on a flat plate machine to obtain a flat plate preformed body with the density of 0.50 to 0.75 g / cm<3>; C, placing the flat plate preformed body into a chemical vapor deposition furnace and densifying to obtain a carbon / carbon composite material flat plate with the density of 1.35 to 1.55 g / cm<3>; D, placing the densified flat plate into a high-temperature graphitization furnace and performing treatment at 2,200 DEG C for 2 hours; E, placing the flat plate subjected to high-temperature graphitization treatment on a lathe and cutting into a flat plate with the designed size; and F, placing the cut flat plate into the chemical vapor deposition furnace and depositing one layer of carbide on the surface of the flat plate to obtain the finished product. The method is mainly used for preparing the carbon / carbon composite material flat plate with the carbide coating on the surface.

Description

technical field [0001] The invention relates to a preparation method of a carbon / carbon composite material flat plate, in particular to a preparation method of a carbon / carbon composite material flat plate with a carbide coating on the surface. Background technique [0002] At present, solar power generation technology has been widely used, but improving the conversion efficiency of silicon wafers and reducing costs has always been the direction of efforts of relevant enterprises and researchers. With the increasing maturity and application of polysilicon ingot technology to prepare polysilicon wafers, polysilicon ingot technology has been further developed, especially the manufacturing technology of ingot furnace with larger feeding capacity has matured, which will further reduce the cost of silicon wafers. At present, the carbon / carbon composite material flat plate is mainly used in the top insulation felt bearing plate and the crucible cover plate in the ingot furnace...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83C04B41/85C04B35/622
Inventor 陈旭军黄建中谭跃伍
Owner HUNAN YOUYUAN MATERIALS
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