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Surface treatment method for silicon carbide ceramic

A silicon carbide ceramic and surface treatment technology, applied in the field of materials, can solve the problems of unsuitable silicon carbide ceramic/fiber reinforced resin matrix composite material, good corrosion resistance of silicon carbide ceramic, unsatisfactory corrosion effect of corrosive liquid, etc. The effect of industrialization promotion, stable process quality and easy control

Active Publication Date: 2015-09-02
山东三达科技发展有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Silicon carbide ceramics have good corrosion resistance, and the corrosion effect of conventional corrosion solutions is not ideal
In the study of the microstructure of silicon carbide ceramics, treatment processes such as strong acid and high-temperature molten salt are generally used, but this method causes a significant decrease in the performance of the ceramic, and is not suitable for use as silicon carbide ceramics / fiber-reinforced resin matrix composites

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Put the silicon carbide ceramics in an acetone solution with a mass concentration of 5% trichlorethylene for cleaning treatment, soak for 2 hours, clean it with clean water, and place it in a mixed aqueous solution of potassium ferricyanide and potassium hydroxide with a mass concentration of 30%. (Mass ratio of potassium ferricyanide to potassium hydroxide is 1:0.5), soak at room temperature for 5 hours, wash with water until the washing liquid is neutral; place in γ-aminopropyltriethoxysilane coupling agent (KH550) Soak in ethanol solution with a mass concentration of 3% for 3 minutes, and dry at room temperature to complete the surface treatment.

[0022] The interface contact angle between silicon carbide ceramics and EVA resin after surface treatment by this method is 89°

[0023] Lay the treated silicon carbide ceramics, EVA hot melt adhesive film, and aramid fiber fabric in sequence, and hot press on a flat vulcanizing machine to prepare silicon carbide ceramic / E...

Embodiment 2

[0027] Put the silicon carbide ceramics in an alcohol solution with a mass concentration of 8% trichlorethylene for cleaning treatment, soak for 1.5 hours, wash it with clean water, place it in an aqueous solution of potassium dichromate with a mass concentration of 15%, and let it soak at room temperature For 8 hours, wash with water until the washing liquid is neutral; soak for 1 minute in an ethanol solution with a mass concentration of 5% of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane coupling agent (KH792) , dry at room temperature to complete the finish.

[0028] The interface contact angle between silicon carbide ceramics and EVA resin after surface treatment by this method is 86°.

[0029] Lay the treated silicon carbide ceramics, EVA hot melt adhesive film, and aramid fiber fabric in sequence, and hot press on a flat vulcanizing machine to prepare silicon carbide ceramic / EVA resin / aramid fiber composite material samples, silicon carbide ceramic / EVA The resin inter...

Embodiment 3

[0033] Put the silicon carbide ceramics in an alcohol solution with a mass concentration of 10% trichlorethylene for cleaning treatment, soak for 1 hour, wash it with clean water, and place it in an aqueous solution of potassium dichromate with a mass concentration of 5% and a mass concentration of 20%. In the mixed aqueous solution (mixing mass ratio of solution 1:3) of potassium ferricyanide and potassium hydroxide aqueous solution (mass ratio of potassium ferricyanide to potassium hydroxide is 1:3), soak at room temperature for 7 hours, and wash with water until The washing liquid is neutral; put in γ-glycidyl etheroxypropyl trimethoxysilane coupling agent (KH560), γ-(methacryloyloxy)propyltrimethoxysilane coupling agent (KH570) and other quality Mix, soak in ethanol solution with a total mass concentration of 1% for 5 minutes, and dry at room temperature to complete the surface treatment.

[0034] The interface contact angle between silicon carbide ceramics and EVA resin a...

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Abstract

The invention belongs to the surface treatment technology of materials. By adopting a method of combining surface control corrosion and surface coupling, surface control corrosion of the silicon carbide ceramic is realized in a relatively mild condition, so that the interface bonding property of the silicon carbide ceramic and an organic system is improved. The surface treatment method for silicon carbide ceramic provided by the invention comprises the following steps: pre-treatment; surface treatment; and post-treatment. By using one or a combination system of a potassium dichromate aqueous solution, a mixed aqueous solution of potassium dichromate and potassium hydroxide and a mixed aqueous solution of potassium ferricyanide and potassium hydroxide as a surface corrosion liquid, the mass concentration is between 5% and 50%, and the ceramic is soaked for 2-8 hours at the room temperature. The treatment method can be used for remarkably improving the surface wettability of the silicon carbide ceramic and improving the interface bonding strength of the silicon carbide ceramic / fiber-reinforced resin-based composite material, is simple to operate and easy to control, and is suitable for treatment of the bonding face of the silicon carbide ceramic and the organic system, particularly the technical field of processing of silicon carbide ceramic / fiber-reinforced resin-based composite material.

Description

technical field [0001] The invention belongs to the field of material technology and relates to surface treatment technology, in particular to ceramic surface treatment technology. Background technique [0002] Silicon carbide ceramics have excellent characteristics such as high hardness, low density, high temperature strength, strong oxidation resistance, wear resistance, good thermal stability and strong chemical corrosion resistance. Silicon carbide ceramics / fiber-reinforced resin matrix composites have light weight , good impact resistance and other characteristics, it is a special protective material widely used in the field of public safety. Due to the smooth surface of silicon carbide ceramics, its strong covalent bond leads to high inertia of the ceramic surface, which makes the interface bonding strength between ceramics and fiber reinforced resin matrix composites low, which affects the resistance of silicon carbide ceramics / fiber reinforced resin matrix composites...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/91C04B35/565
Inventor 魏汝斌李锋翟文梁勇芳张文婷陈青香
Owner 山东三达科技发展有限公司
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