The preparation process of RBSIC ceramic
The preparation process of reaction bonded silicon carbide ceamic is relatively simple. Directly using particle grade silicon carbide (usually 1-10 μ m) Mix with carbon to form a blank, and then penetrate silicon at high temperatures. Part of the silicon reacts with carbon to form a bond with the silicon in the raw material, achieving the purpose of sintering.
As for the reaction bonded silicon carbide ceamic items.There are two methods for penetrating silicon. One is when the temperature reaches the melting temperature of silicon, producing the liquid phase of silicon. Through the action of capillaries, silicon directly enters the green body and reacts with carbon to produce silicon carbide, achieving sintering; Another method to preare reaction bonded silicon carbide ceamic products is to produce silicon vapor at a temperature higher than the melting temperature of silicon, which penetrates into the green body to achieve sintering.
There are three main methods for forming RBSIC reaction bonded silicon carbide ceamic, the most commonly used being casting, which involves configuring and mixing the slurry of RBSIC silicon carbide, and then pouring the slurry into the prepared mold for molding. Another method of forming RBSIC Silicon carbide ceramic is extrusion molding, which prepares the material into a mud like shape and then extrudes each piece into a mold. Another method of forming RBSIC wear-resistant is dry pressing, which prepares dry powder silicon carbide and then presses it into shape using a mold on a press.
