Are there two types of silicon carbide for machine seals?
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Are there two types of silicon carbide for machine seals? Is silicon carbide suitable for use as a rotating ring or a stationary ring? Why does silicon carbide used for static rings appear and feel like ceramic (with a smooth surface and a slight shine), and is it prone to breaking? And the silicon carbide used for the rotating ring seems to feel like black, hard rubber or plastic (with a matte surface)? Are they two different types of silicon carbide?
Generally, hard rings have a wider torus shape; the commonly used silicon carbide is available in both reaction-sintered and pressureless-sintered forms
One should be silicon carbide, and the other one should be tungsten carbide
The one with a metallic luster is tungsten carbide, while the one without a metallic luster is silicon carbide.
Silicon carbide can be sintered through either reactive sintering or pressureless sintering; it belongs to the category of ceramics, is relatively brittle, but highly wear-resistant. In mechanical seal friction pairs, silicon carbide can be used as either the moving ring or the stationary ring, and a silicon carbide-silicon carbide pairing can also be employed in media containing particles. The moving ring that lacks luster, as you mentioned, might be made of graphite material.
It indicates that your moving ring is not made of silicon carbide
It indicates that your moving ring is not made of silicon carbide
There are two types: one is pressureless sintered silicon carbide, and the other is reaction-sintered silicon carbide