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Method for preparing high-performance silicon carbide coating on the surface of carbon-carbon composite insulation material

A technology of high-performance silicon carbide and thermal insulation materials, applied in the field of thermal insulation materials, can solve problems such as wear of thermal insulation materials, erosion of carbon/carbon composite thermal insulation materials, and shortened life of carbon/carbon composite thermal insulation materials, so as to improve strength and combine The effect of firmness and service life improvement

Active Publication Date: 2020-01-31
ANHUI HONGCHANG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, some high-temperature industrial equipment (such as monocrystalline silicon growth furnaces, atmosphere sintering furnaces, etc.) mostly use inert gas for furnace temperature cooling, in which the particulate matter in the furnace will be mixed in the gas to form a high-speed particle flow, scouring the surface of the insulation material , so that the insulation material is subjected to a large amount of wear due to the erosion of the high-speed particle flow; in addition, there is a large amount of silicon vapor in the single crystal silicon growth furnace, which will react with the carbon / carbon composite insulation material at high temperature and gradually erode The carbon / carbon composite insulation material makes it invalid, and the existence of the above two factors will lead to a serious shortening of the life of the carbon / carbon composite insulation material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation method of silicon carbide coating on the surface of carbon / carbon composite thermal insulation material includes the following steps:

[0025] Step 1: The production of the carbon / carbon composite insulation material initial blank, according to the size of the required product, the customized initial density is 0.20g / cm 3 According to the designed product structure and size, the hard carbon felt is machined to dimensional accuracy to obtain the carbon / carbon composite thermal insulation material initial blank;

[0026] Step 2: Pretreatment of the carbon / carbon composite thermal insulation material preliminary blank, grinding and polishing the surface of the carbon / carbon composite thermal insulation material preliminary blank, ultrasonic cleaning, drying for use, grinding and polishing the surface of the carbon / carbon composite thermal insulation material preliminary blank, grinding The sandpaper for polishing is #600 sandpaper, ultrasonically cleaned in...

Embodiment 2

[0034] The preparation method of silicon carbide coating on the surface of carbon / carbon composite thermal insulation material includes the following steps:

[0035] Step 1: The production of the carbon / carbon composite thermal insulation material initial blank, according to the size of the required product, the customized initial density is 0.17g / cm 3 According to the designed product structure and size, the hard carbon felt is machined to dimensional accuracy to obtain the carbon / carbon composite thermal insulation material initial blank;

[0036] Step 2: Pretreatment of the initial blank of the carbon / carbon composite thermal insulation material, grinding and polishing the surface of the initial blank of the carbon / carbon composite thermal insulating material, ultrasonic cleaning, and drying for use. The surface of the carbon / carbon composite thermal insulation material was ground and polished. The sandpaper used for grinding and polishing was #600 sandpaper. Ultrasonic cle...

Embodiment 3

[0044] The preparation method of silicon carbide coating on the surface of carbon / carbon composite thermal insulation material includes the following steps:

[0045] Step 1: The production of the carbon / carbon composite insulation material initial blank, according to the size of the required product, the customized initial density is 0.18g / cm 3 According to the designed product structure and size, the hard carbon felt is machined to dimensional accuracy to obtain the carbon / carbon composite thermal insulation material initial blank;

[0046] Step 2: Pretreatment of the initial blank of the carbon / carbon composite thermal insulation material, grinding and polishing the surface of the initial blank of the carbon / carbon composite thermal insulating material, ultrasonic cleaning, and drying for use. The surface of the carbon / carbon composite thermal insulation material was ground and polished. The sandpaper used for grinding and polishing was #600 sandpaper. Ultrasonic cleaning wa...

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Abstract

The invention discloses a method for preparing a high-performance silicon carbide coating on the surface of a carbon-carbon composite thermal insulation material, which belongs to the technical field of thermal insulation materials and includes the following steps: making a carbon / carbon composite thermal insulation material blank according to the size of the required product , customize the rigid carbon felt with a certain initial density, according to the designed product structure and size, machine the hard carbon felt to the dimensional accuracy, and obtain the carbon / carbon composite thermal insulation material blank; the carbon / carbon composite thermal insulation material preliminary blank Pretreatment: grinding and polishing the surface of the carbon / carbon composite thermal insulation material blank, drying it after ultrasonic cleaning; coating slurry and ceramic treatment; carbon deposition treatment; high temperature sintering treatment. The silicon carbide coating prepared by the method of the present invention is firmly combined with the carbon / carbon composite thermal insulation material matrix, and the coating has no cracking phenomenon, which greatly improves the strength of the surface coating of the carbon / carbon composite thermal insulation material, and the service life is significantly improved improvement.

Description

technical field [0001] The invention relates to a method for preparing a high-performance silicon carbide coating on the surface of a carbon-carbon composite thermal insulation material, and belongs to the technical field of thermal insulation materials. Background technique [0002] Carbon-carbon composite insulation material is a carbon / carbon composite material composed of carbon fiber as reinforcement and resin carbon or deposited carbon as matrix. It is a new type of advanced thermal field material that can be used in high temperature environments. Carbon-carbon composite insulation The material has excellent properties such as low density, low coefficient of linear expansion, high temperature resistance, strong thermal shock resistance, strong chemical corrosion resistance, high purity and no pollution. Therefore, it has very outstanding thermal insulation properties, so it is widely used in the manufacture of thermal insulation parts for single crystal furnaces and po...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/83C04B35/622C04B41/87
CPCC04B35/622C04B35/83C04B41/87C04B41/009C04B41/5059C04B41/4517C04B41/4539C04B41/4554
Inventor 蔡昌海肖孝天洪亮熊永祥宋良芬
Owner ANHUI HONGCHANG NEW MATERIAL CO LTD