Reaction Bonded SiC – Optimal Performance for Extreme Conditions

Reaction Bonded SiC (RBSC) is a dense ceramic material composed of silicon carbide and carbon particles. Firing results in minimal changes to its dimensions, permitting near net shape production without additional post firing machining costs.

RBSC pore structures were found to depend on several key variables related to graphitisation degree, size and morphology of carbon sources; their influence over how reactive carbon was with respect to silicon melt was immense.

Высокая прочность

Silicon carbide is an extremely strong and stiff material that can withstand high levels of stress without failing its structural integrity. Due to its low density and high specific stiffness, silicon carbide makes a desirable material in situations like space telescopes where weight restrictions must be considered.

Chemical inertness of RB SiC makes it ideal for applications where aggressive chemicals will come into contact. Furthermore, its temperature shock resistance enables it to withstand sudden changes in environmental conditions.

To increase the flexural strength and elastic modulus of RB SiC, we investigated how different carbon contents affect its microstructure. By using a composite precursor solution of PF and FA precursors, we were able to control both content and crystallinity of carbon in our porous preform, producing RB SiC with higher flexural strength and elastic modulus properties.

Высокая теплопроводность

SiC is highly thermal conductive, with an approximate conductivity of 300 W/mK – making RBSC an excellent option for applications requiring high temperature performance.

RBSC boasts excellent resistance to abrasive and erosive wear, making it ideal for demanding industrial environments. Furthermore, its low coefficient of thermal expansion enables rapid temperature fluctuations without compromise to structural integrity.

Raw material particle size distribution used in the preparation of RBSC preforms has an enormous effect on their microstructure and physical properties, such as their flexural strength and elastic modulus values. An increase in carbon black content results in enhanced microstructure with greater flexural strength and elastic modulus values in finished products with better microstructure.

Low Temperature Expansion

Reaction Bonded SiC offers applications that require resistance to high temperatures an outstanding thermal expansion capability, achieved through using carbon black and micro-spherical graphite in its fabrication process. The composition, structure, and properties of Reaction Bonded SiC vary based on its carbon content, proportion, morphology and form of carbon sources used.

Reaction bonding provides an effective method for producing ceramic materials such as refractories, porous filter bodies and wear components like mechanical seals and bearings.

RB SiC is an extremely robust and reliable material that excels in multiple environments. Due to its low thermal expansion rate, this material makes for perfect applications requiring precise dimensional stability such as pumps, bearings and flow control chokes. Furthermore, this versatile material can also be used to manufacture components for semiconductor manufacturing equipment like wafer handling components.

Low Friction

Reaction Bonded Silicon Carbide (RBSC) is an adaptable ceramic material, capable of being formed into intricate forms for professional and industrial uses. RBSC boasts excellent wear resistance with low coefficient of expansion; corrosion resistance; as well as outstanding electrical properties.

RBSC is produced by infiltrating porous silicon carbide preforms with liquid silicon. This creates a ceramic with an impervious structure, resistant to moderately caustic and acidic fluids as well as light hydrocarbons. Furthermore, its impervious composition and surface texture reduce friction for extended component life and it is lightweight and stiff making it suitable for space telescopes where payload weight limits exist; its highly dimensionally stable surface further adds value.

High Chemical Resistance

Reaction Bonded SiC is highly resistant to chemical corrosion, making it ideal for environments using corrosive materials. Furthermore, its low thermal expansion and strength enable it to withstand extreme temperatures.

Reaction bonded production involves injecting molten silicon into porous carbon material packed into the shape of your desired part, where it then reacts with carbon molecules to form silicon carbide.

Research has established that RBSC ceramics’ flexural strength, elastic modulus and porosity depend on their content and proportion of carbon source material. Achieving reasonable gradation in both terms of carbon source and morphology significantly enhances performance; this ensures even distribution of free sic particles within close-packed microstructure and superior properties for final products.