Silicon Carbide Ceramic Sleeve

Semicorex Silicon Carbide Ceramic Sleeve stand out as the premier choice for these high-performance hard rings, offering a unique combination of physical and chemical properties that outperform metals and standard ceramics.

To guarantee the normal running of the seal rings in the mechanical equipment, considering the aspects of less abrasion, corrosion resistance and biting preventing, the Silicon Carbide Ceramic Sleeve is usually prepared into a pair of hard and soft rings with different hardness. In common, the hard ring act as dynamic ring, so the material choice of the hard ring should have enough strength and rigidity, good friction properties, good thermal conductivity and heat resistance, and good corrosion resistance.

Silicon carbide has high hardness and low coefficient of friction, this property make it excellent wear resistance, it is particularly suitable for various sliding friction and wear conditions. Silicon carbide also possesses high high-temperature strength. The bending strength at 1400℃ is the same as its bending strength at room temperature. It can be processed into the seal rings with different shapes, dimension accuracy and with high surface finish. It also has good airtightness and long service life. As a result, SiC ceramic can be used in the mechanical seals in high temperature working environment.

Silicon carbide has excellent chemical stability, making it suitable for use in mechanical seals with corrosive media, including acids and alkalis. Corrosion and wear are the primary reasons of failure in friction pair materials. Hot-pressed sintered SiC forms a protective silica film on the surface in an oxidizing atmosphere. It can maintain excellent chemical stability and strong corrosion resistance even at 900℃.

Key Performance Advantages

1. Exceptional Friction Resistance and Wear Resistance

Silicon Carbide is known for its exceptionally great hardness, an attribute that makes it the second-hardest material (after diamond) along with Boron Carbide; therefore, the hardness of Silicon Carbide and the naturally existent low coefficient of friction presented within Silicon Carbide offer it extremely wear-resistance characteristics. This quality of wear-resistance is extremely helpful when used in sliding environments that create an aggressive environment (high-speed or having an abrasive material) to quickly wear down conventional materials. due to this wear-resistance, SiC sleeves will maintain the seal interface tightly over a significantly longer period of service life than standard industrial sealing sleeves.

2. Superior Thermal Stability

Unlike metals, which can lose strength or integrity under extreme heat, Silicon Carbide stays together under intense thermal exposure, which provides Silicon Carbide with excellent thermal stability integrity. The flexural strength of Silicon Carbide at a temperature of 1400 degrees Celsius (1400° C) is virtually identical to the flexural strength of the same material at room temperature. The thermal stability of Silicon Carbide sleeves will allow producers to produce them at an extremely high level of precision and an ideal surface finish, with no warpage due to thermal stress. Silicon Carbide sleeves are an efficient gas-tight seal and provide a long service life in the extreme industrial processes characterized by the use of high temperature.

3. Superior Chemical and Corrosion Resistance

Seals that are used in the chemical processing, pharmaceutical, and oil & gas industries must exhibit a high degree of chemical stability. The chemical inertness of SiC sleeves allows for their use in applications involving highly acidic or alkaline (i.e., corrosive) media.

Corrosive wear is one of the primary causes of failure of seals. The process of manufacturing Hot-Pressed Sintered Silicon Carbide produces a natural defense mechanism against corrosion: when placed in oxidizing conditions, a protective layer of $SiO_2$ is formed on the outer surface of the material. This thin film has excellent chemical stability up to temperatures of 900°C and protects the underlying material from being corrupted by aggressive chemicals.

Technical Specifications & Applications

Our Silicon Carbide Ceramic Sleeve is engineered to meet the stringent demands of modern sealing technology:

Industrial Applications

Chemical Processing: Handling aggressive acids, lyes, and organic solvents.

Mining & Slurry: Resisting abrasion from grit and mineral particulates.

Power Generation: High-temperature boiler feed pumps and cooling systems.

Refineries: Managing high-pressure hydrocarbons and volatile fluids.

Conclusion

Semicorex Silicon Carbide Ceramic Sleeve, you are investing in a component that addresses the four pillars of seal reliability: Hardness, Thermal Management, Chemical Inertness, and Precision. Whether you are dealing with high-speed rotation or toxic chemical transport, our SiC sleeves provide the "hard-face" security required to keep your operations running smoothly, safely, and efficiently.