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Method for preparing self-lubricating silicon carbide composite ceramic-based sealing material

A technology of composite ceramics and sealing materials, which is applied in the field of ceramic production, can solve problems that affect product life, fracture, and wear of silicon carbide ceramic composite materials, and achieve the effects of prolonging service life, simple process methods, and increasing self-lubricating properties

Inactive Publication Date: 2015-06-03
ANHUI HEHAN OPTOELECTRONICS TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, silicon carbide ceramic composites are prone to wear and even fracture during work, which affects the service life of the product

Method used

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Embodiment Construction

[0012] specific implementation plan

[0013] The present invention will be described in detail below through specific examples.

[0014] A preparation method of a self-lubricating silicon carbide composite ceramic-based sealing material, which is made of the following raw materials in parts by weight (kg): silicon carbide 85, stainless steel powder 10, molybdenum disulfide 7, carbon powder 4, magnesium oxide 3, silane disulfide Joint agent KH-5502, boron fiber 4, polyvinylidene fluoride 3, polyvinylpyrrolidone 1, sintering aid 3, deionized water 90;

[0015] The sintering aid is made of the following raw materials in parts by weight (kg): aluminum oxide 5, yttrium oxide 2, ammonium chloride 2, iridium nitrate 6, carbon nanoparticles 5, clay powder 4, dimethyl silicone oil 2, Liquid paraffin 3, silane coupling agent KH-5501, artificial diamond powder 3, vinyl acetate resin 2, tricresyl phosphate 1, purified water 5; the preparation method is to combine aluminum oxide, yttrium...

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PUM

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Abstract

The invention discloses a method for preparing a self-lubricating silicon carbide composite ceramic-based sealing material. The self-lubricating silicon carbide composite ceramic-based sealing material is characterized by comprising the following raw materials in parts by weight: 70-90 parts of silicon carbide, 8-12 parts of stainless steel powder, 5-7 parts of molybdenum disulfide, 2-5 parts of carbon powder, 2-3 parts of magnesium oxide, 1-2 parts of silane coupling agent KH-550, 4-5 parts of boron fibre, 2-3 parts of polyvinylidene fluoride, 1-2 parts of polyvinylpyrrolidone, 3-5 parts of sintering aids and 80-100 parts of deionized water. The self-lubrication of the ceramic is increased, the abrasion is reduced and the service life is prolonged by adding molybdenum disulfide and the carbon powder into the silicon carbide composite ceramic; the added stainless steel powder has the characteristics of low sintering temperature, low sintering aid proportion and high silicon carbide ceramic performance. The method is simple in process, moderate in cost and suitable for mass production.

Description

technical field [0001] The invention relates to a preparation method of a self-lubricating silicon carbide composite ceramic-based sealing material, which belongs to the technical field of ceramic production. Background technique [0002] Silicon carbide ceramic matrix composites are a new generation of thermal structural materials with strong high temperature resistance, strong oxidation resistance, wear resistance, small linear expansion coefficient, chemical corrosion resistance, and low density, which can effectively increase the operating temperature of the engine and reduce the structural weight , has broad application prospects in the field of high thrust-to-weight ratio aeroengines. However, silicon carbide ceramic composite materials are prone to wear and even fracture during work, which affects the service life of the product. Therefore, the present invention adds lubricating molybdenum disulfide and carbon powder to increase the lubricity of the silicon carbide ...

Claims

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Application Information

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IPC IPC(8): C04B35/565C04B35/622
Inventor 夏云
Owner ANHUI HEHAN OPTOELECTRONICS TECH
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