How about the manufacturing process for RBSIC products? It is a precise and systematic procedure that combines powder metallurgy and chemical reaction principles.
First, raw material preparation is critical. Fine silicon carbide (SiC) powder (as the main aggregate) and a small amount of carbonaceous powder (such as graphite or carbon black) are uniformly mixed. The carbon content is strictly controlled to ensure complete reaction with silicon later. A suitable binder (e.g., wax or resin) is added to the mixture to enhance its plasticity for molding.
Next is molding. The mixed powder is shaped into green bodies using methods like die pressing, isostatic pressing, or extrusion, depending on the product’s shape and size. The green bodies are then "debindered" – heated at a low temperature (around 400-600°C) to remove the binder, avoiding cracking during subsequent high-temperature processes.
The core step is reaction bonding. The debindered green bodies are placed in a high-temperature furnace (1600-1700°C) under an inert atmosphere. Molten silicon is infiltrated into the green body’s pores. The silicon reacts chemically with the carbon in the green body to form new SiC, which bonds the original SiC particles tightly. This process ensures the product has high density and strength.
Finally, post-processing is conducted. The bonded products undergo machining (e.g., cutting, grinding, polishing) to achieve the required dimensions and surface finish. Some products may also go through quality inspection, such as density and hardness testing, to ensure they meet application standards.
Post time: 2025-10-27