The specific preparation process of RBSIC ceramic for casting
The specific preparation process of reaction sintered silicon carbide for casting mainly includes steps such as raw material preparation, molding, drying, and sintering.
The specific operation process is as follows:
(1) Raw material preparation for the reaction bonded silicon carbide ceamics: the raw material mainly composed of high-quality SiC particles, processed through screening, grinding, etc., mixed in a certain proportion, and added with an appropriate amount of binder and rheological agent to make a uniform slurry.
(2) Molding of RBSIC ceramics: The mud of reaction bonded silicon carbide ceamics is formed by printing, injection, pressing, and other methods, with a molding pressure of generally 100-200Pa. After molding, the surface has a certain roughness.
(3) Drying of silicon carbide product: The formed ceramic products are dried, usually using methods such as air drying, vacuum drying, and hydrothermal treatment to accelerate the drying speed.
(4) Sintering of RBSIC wear-resistant: Place the dried ceramic products in a high-temperature furnace for sintering, with a temperature generally between 1900 and 2200 ℃ and a sintering time typically of 1-3 hours, to obtain reaction sintered silicon carbide ceramic products with high strength and good wear resistance.
