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Method for preparation of graphite surface silicon carbide coating

A silicon carbide coating and graphite technology, applied in the field of silicon carbide coating on graphite surface, can solve the problems of high energy consumption, complex production process, low performance of graphite silicon carbide material, etc., and achieve the effects of reduced energy consumption and simple process

Inactive Publication Date: 2013-01-02
QINGDAO TIANDI CARBON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, graphite silicon carbide material graphite silicon carbide coating is mostly produced by vapor deposition method, but looking at the existing vapor deposition method, it mainly has complex production process, high energy consumption in the production process, and the production of graphite silicon carbide The problem of relatively low material performance

Method used

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Embodiment 1

[0022] A method for silicon carbide coating on a graphite surface, comprising:

[0023] Take 99.99% of the graphite material and silane and mix them in a weight ratio of 1:1 to make a graphite silane mixed material, then pretreat according to the furnace, turn on the electricity to heat up, secondly heat up and keep warm, three times heat up and keep warm, four times heat up, keep warm and The temperature is lowered; the furnace pretreatment is filled with nitrogen, nitrogen is filled during the electrification and heating process, and nitrogen and hydrogen gas are filled during the four heating and heat preservation processes. The details are as follows:

[0024] Furnace pretreatment: evacuate the deposition furnace to -10KPa and let it stand for 1.5 minutes, then fill the deposition furnace with nitrogen until the furnace reaches the normal pressure position;

[0025] Power on and heat up: After the pretreatment of the deposition furnace, put the graphite-silane mixed materi...

Embodiment 2

[0031] A method for silicon carbide coating on a graphite surface, comprising:

[0032] Take 99.99% graphite material and silane and mix them in a weight ratio of 1 to 1 to make a graphite silane mixed material, then pretreat according to the furnace, power on and heat up, heat up twice, keep warm, heat up three times, keep warm, heat up four times, keep warm and The temperature is lowered; the furnace pretreatment is filled with nitrogen, nitrogen is filled during the electrification and heating process, and nitrogen and hydrogen gas are filled during the four heating and heat preservation processes. The details are as follows:

[0033] Furnace pretreatment: evacuate the deposition furnace to -10KPa and let it stand for 2 minutes, then fill the furnace with nitrogen until the furnace reaches normal pressure;

[0034] Power on and heat up: After pretreatment of the deposition furnace, put the graphite-silane mixed material into the furnace, turn on the power switch of the depo...

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Abstract

The invention discloses a method for preparation of a graphite surface silicon carbide coating. The method includes: mixing 99.99% of a graphite material with silane in a weight ratio of 1:1 to prepare a graphite-silane mixed material, then conducting furnace pretreatment, energization warming, secondary warming and heat preservation, third warming and heat preservation, fourth warming and heat preservation, and cooling. Specifically, nitrogen charging is carried out during the furnace pretreatment and the energization warming, and charging of a nitrogen-hydrogen mixed gas is performed during the fourth warming and heat preservation. A graphite carbon material workpiece treated by the method can endure a high temperature up to 1600DEG C, is not oxidized below 2000DEG C under an aerobic state, and can resist corrosion of various acid and alkali salts.

Description

technical field [0001] The invention belongs to the field of new carbon materials, and in particular relates to a method for coating silicon carbide on the surface of graphite. Background technique [0002] Graphite silicon carbide material is coated with silicon carbide on the surface of graphite. This material has excellent mechanical, physical and chemical properties, and has the remarkable characteristics of high temperature resistance, aging resistance and acid, alkali and salt resistance. It can be widely used in nuclear energy, high temperature carrier, Aviation, aerospace and high-speed brake products. [0003] At present, the graphite silicon carbide coating method of graphite silicon carbide material is mostly produced by vapor deposition method, but looking at the existing vapor deposition method, it mainly has complex production process, high energy consumption in the production process, and the production of graphite silicon carbide The problem of relatively lo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/65
Inventor 孙丰武单连文孙鹏飞
Owner QINGDAO TIANDI CARBON
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