The ways of handling the surface of silicon carbide ceramics
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By means of surface controlled corrosion and surface coupling, the surface controlled corrosion of silicon carbide ceramics was realized under relatively mild conditions to improve the interfacial bonding properties of silicon carbide ceramics and organic systems. Silicon carbide ceramic surface treatment methods, including pretreatment, surface treatment and post-treatment process, the use of potassium dichromate aqueous solution, potassium dichromate and potassium hydroxide mixed aqueous solution, potassium ferricyanide and potassium hydroxide in a mixed aqueous solution Or its combination system as a surface etching solution, the mass concentration between 5% to 50%, room temperature soak 2 to 8 hours.
The treatment method significantly improves the surface wettability of the silicon carbide ceramics and also improves the interfacial bonding strength of the silicon carbide ceramic / fiber reinforced resin matrix composites. It is suitable for the treatment of the bonding surface of silicon carbide ceramic and organic system, and is particularly suitable for the processing technology of silicon carbide ceramic / fiber reinforced resin matrix composite material. The silicon carbide ceramic surface treatment method comprises a pretreatment, a surface treatment and a post-treatment process, characterized in that the surface treatment comprises surface-controlled corrosion and surface coupling; the surface-controlled corrosion is carried out using an aqueous solution of potassium dichromate, potassium dichromate and hydroxide Potassium mixed aqueous solution, potassium ferricyanide and potassium hydroxide mixed aqueous solution as a surface etching solution, the mass concentration between 5% to 50%, room temperature soak for 2 hours to 8 hours.