1. What is Green Silicon Carbide F320?
Green Silicon Carbide (SiC): A synthetic mineral known for its exceptional hardness (9.5 on the Mohs scale, close to diamond) and sharp, brittle crystals. It has high thermal conductivity and is purer than black silicon carbide. F320: This is the grit size according to the FEPA standard. F320 corresponds to an average particle diameter of approximately 28.5 microns (0.0285 mm). This is a fine grit, similar to a very fine sandpaper.
2. Role and Advantages in Brake Pads
Increases Friction Coefficient: Its primary job is to “bite” into the brake disc surface. Through microscopic cutting and plowing actions, it creates strong, immediate friction, providing excellent braking force, especially at lower temperatures. Improves Pad Wear Resistance: The hard particles act as a reinforcing skeleton within the pad, increasing its mechanical strength and reducing its own wear rate, potentially extending pad life. Cleans the Disc Surface: It helps scour away rust, oxide layers, and old transfer films from the disc, ensuring consistent metal-to-pad contact for stable performance. Enhances Thermal Conductivity: Its good heat dissipation helps transfer heat away from the friction surface, mildly aiding in thermal management.
3. Application in Brake Pad Formulations
Binder: (e.g., Phenolic Resin) to hold everything together. Fibers: (e.g., Steel, Aramid, Glass) for structural strength. Lubricants/Solid Lubricants: (e.g., Graphite, Sb₂S₃) to stabilize friction and reduce noise. Fillers: (e.g., Barium Sulfate) to control cost and density.
4. Typical Use Cases
High-Performance & Racing Brake Pads: Where maximum friction and fade resistance are critical, and accelerated disc wear is an acceptable trade-off. Certain “Ceramic” Formulations: It may be used in small amounts to fine-tune the friction coefficient and improve consistency. It is generally NOT used in standard, low-metallic, or NAO (Non-Asbestos Organic) pads aimed at everyday drivers seeking quiet operation and long disc life.
