Nitride Bonded Silicon Carbide

Nitride-bonded silicon carbide boasts excellent mechanical strength and toughness, impact resistance and chemical resistance – as well as being suitable for manufacturing into different shapes and sizes, from cone and sleeve types to complex engineered pieces for equipment involved with mining or processing raw materials.

Nitride-bonded silicon carbide offers less wear resistance than steel and the padding weld, which are both commonly employed in metal-mineral tribological pairs. To counteract this disadvantage, adequate embedding material should be employed.

Wear Resistance

Nitride-bonded silicon carbide can be utilized for an array of applications due to its extraordinary mechanical strength, high temperature stability and wear resistance. Produced by mixing coarse and medium-grained SiC grit with finely ground Si powder (and biners), cast, pressed or injection moulded into desired shapes before firing in a nitrous atmosphere, its tribological properties mirror those of non-oxide bonded silicon carbide ceramics while offering increased impact resistance and thermal shock resistance.

Nitride-bonded silicon carbide stands up well against soil abrasion tests, with light soils with loose grains of sand showing the least wear from micro-cutting caused by free movement of grains across friction surfaces and micro-cutting caused when these grains scratch surfaces freely – producing far fewer dents than any of the other top layer materials tested.

Nitride-bonded silicon carbide can be formed into complex shapes using the Blasch process, making it a fantastic choice for applications requiring very accurate dimensions. Nitride bonded silicon carbide is often manufactured as cast refractories used in furnaces, kilns and other heavy duty equipment as a cast refractory; other uses may include cyclone liners for mineral and coal plants as well as chemical plant abrasion resistant components and pump parts. Nitride-bonded silicon carbide is highly robust making it suitable for harsh service environments subjected to extreme temperatures, pressures and abrasion.

Thermal Stability

Silicon nitride boasts a high melting point and excellent thermal stability when exposed to extreme temperatures, even at subzero temperatures. Nitride bonded silicon carbide does not experience thermal shock or erosion when subjected to these extreme temperatures, making it suitable for use in harsh industrial environments and resisting many alkali metal melts such as non-ferrous metal melts. Nitride bonded silicon carbide refractory bricks made with this material can also be found used for steel- and nonferrous metal metallurgy as well as waste incineration or mineral processing applications.

Nitride-bonded silicon carbide (NBSIC) is produced through reaction bonding, in which a SiC-Carbide powder binder is heated under carefully controlled temperatures and pressures to produce sintered silicon carbide. Once sintered, silicon nitride infiltrates its way into the SiC-Carbide body creating dense material; producing an end result with large grains of silicon carbide separated by small needle-like grains of silicon nitride with strong interfaces between phases.

These materials are highly stable at high temperatures and possess very low linear expansion coefficients, in addition to being very mechanically strong – resisting compression, stretching, and bending with no problem at all. Molded using the Blasch process, they can be made into intricate and precise shapes for applications including cyclone liners for mineral plant processes with aggressive wear-resistant minerals; corrosion-resistant components in chemical plants and pumps; valve liners, nozzles and spigots in slurry pumps; near net shapes suitable for precision applications like kiln furniture fabrications.

Thermal Conductivity

Nitride-bonded silicon carbide is highly thermally conductive and capable of dissipating energy at high temperatures. This property makes it especially useful in applications requiring materials that maintain strength and stability even at very high temperatures.

Nitride-bonded silicon carbide material’s superior thermal conductivity also aids in keeping workpieces cooler during processing, helping increase productivity while decreasing damage risk.

Nitride bonded silicon carbide’s secondary advantage lies in its resistance to oxidation. The protective nitride coating shields it from this issue in high temperature environments; making nitride bonded silicon carbide suitable for applications that demand materials resistant to the formation of oxides like refractories or industry applications that need material with this property.

Nitride-bonded silicon carbide can be produced in many shapes and sizes, making it a versatile material suitable for various uses from metal casting to kiln furniture production.

Nitride coating makes ceramic more impermeable, increasing its ability to resist corrosion and other environmental contaminants, which makes nitride-bonded silicon carbide ideal for use in highly stressed kiln furniture, such as aluminium reduction cells and copper shaft furnaces.

Chemical Resistance

Nitride-bonded silicon carbide is an exceptional high-performance material with excellent chemical resistance. Able to tolerate extreme temperatures and harsh chemicals while being resistant to corrosion, creep, and oxidation; its wear resistance makes it an excellent choice for environments requiring strength and toughness.

Silicon Carbide is an extremely hard synthetic material with a Mohs hardness rating of 9, which puts it close to diamond in terms of toughness and scratch resistance. This material is commonly found in cutting tools and grinding wheels. Nitride-bonded silicon carbide ceramics are produced by mixing SiC grit with silica powder and binder to form a reaction-bonded matrix, then cast, pressed, or injection moulded into blocks or tiles for use in various applications.

Nitride-bonded silicon carbide properties vary depending on its application; generally it can withstand temperatures up to 1650degC while being resistant to thermal shock. Furthermore, its highly resistant qualities make it suitable for environments such as acids, molten salts, and halogens as well as being poorly wettable by nonferrous metal melts such as zinc, aluminum and tw. copper melting points making it suitable for refractory use in steel and non-ferrous metallurgy industries.

Scroll to Top