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Silicon carbide plate is an extremely hard and dense ceramic material which offers great corrosion protection from acids and high temperatures, as well as rigidity and low thermal expansion, making it an excellent material choice for mirrors in large telescopes.

Saint-Gobain offers an impressive variety of silicon carbide products, including nitride-bonded, reaction bonded and sintered silicon carbide plates. All these fully densified ceramics exhibit excellent physical and chemical properties for use in extreme end use applications.

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Silicon carbide ceramic material has an array of applications due to its superior tribological and corrosion properties, such as seals, mechanical bearings and hot gas or molten metal filters. Furthermore, its corrosion resistance is of great interest and has led to significant research being done into SiC ceramics at elevated temperatures.

Oxide bonded silicon carbide plate stands out for its exceptional corrosion resistance, evidenced by no deep corrosion penetration even in environments containing significant quantities of salt (see sample 1 in Figure 7). As corrosion resistance is mostly determined by segregating impurities from silicon carbide raw materials used during corrosion tests, using pure and well-controlled silicon carbide raw materials ensures accurate evaluations of performance in harsh corrosive environments.

High Temperature Resistance

Silicon carbide (commonly referred to as Carborundum) is a chemical compound composed of silicon and carbon. While naturally found as moissanite mineral, large scale production began in 1893 for use as an abrasive and electronic device components as well as ceramic bulletproof vest plates.

Saint-Gobain refractory ceramics can withstand high temperatures and pressures, making them suitable for composite armor systems designed to guard against existing and emerging ballistic threats.

Oxide-bonded SiC plates are composed of SIC grains bonded together with certain bonding components such as SiO2, to increase load softening temperature, anti-oxidation, and thermal stability. They can be widely utilized in daily ceramic kiln, sanitary ceramic kiln, blast furnace lining and nonferrous metal smelting tank lining applications.

Extreme Hardness

Silicon carbide boasts a Mohs hardness rating close to that of diamond, making it one of the hardest synthetic materials on Earth. Furthermore, its light but strong design allows it to withstand most ballistic threats, making it suitable for body armor and advanced protective systems.

Silicon carbide ceramics can be manufactured through various manufacturing avenues: sintered SiSiC is a fully densified material with excellent mechanical and chemical properties; reaction bonded (SiC/SiO2) ceramic has high fracture toughness while hot isostatically pressed SiC has virtually no shrinkage and excellent properties. Saint-Gobain uses various production techniques to produce products like Hexoloy and DuraShock that combine the strengths of both boron carbide and silicon carbide for unrivalled levels of protection.

These ceramics are carefully packaged and handled in order to avoid damage during shipment and storage, and maintain their pristine condition. Furthermore, they undergo thorough quality tests in order to guarantee consistency and ensure long-term use.

High Strength

Silicon carbide’s exceptional strength enables it to withstand impact, vibration and high temperatures without suffering damage; making it an excellent material choice for heavy-duty applications like mechanical seals, kiln components and wear plates.

Reaction bonded silicon carbide (RB SiC) is an extremely durable ceramic material capable of withstanding high temperatures, corrosion and abrasion. To create this substance, molten silicon must be infiltrated into porous carbon packed in desired shapes using infiltration process; once completed it becomes highly dense material with many of the same advantages of sintered silicon carbide.

Saint-Gobain Performance Ceramics & Refractories offers Reaction Bonded Silicon Carbide plates (RBSiC) which can be machined and shaped for various applications. RBSiC plates can reduce thermal stress during firing by providing stability while decreasing stress-load levels; in kilns these are commonly used to reduce thermal strain as well as provide support beams for structure support beams or car systems.

Stability

Silicon carbide is highly stable at high temperatures and acid corrosion resistant. Furthermore, its mechanical stress tolerance and resistance to abrasive forces make it an excellent material choice for cutting tools or abrasives.

SiC and its alloy a-SiC exhibit hexagonal close-packed tetrahedra that form a hexagonal close-packed structure, with half of their tetrahedral sites filled. Both forms of SiC are covalent compounds with narrow band gaps enabling it to release electrons at elevated temperatures, making this material an excellent semiconductor material.

Sintered silicon carbide (SSiC) is the preferred choice when purchasing silicon carbide, thanks to being densified through reaction bonding and clay infusion processes, offering impressive wear resistance as well as high strength. Furthermore, this version is nontoxicologically safe, making it suitable for applications that may experience high amounts of abrasion such as seals and pump components.