Nitride Bonded Silicon Carbide

Nitride-bonded silicon carbide is an exceptional engineering material with superior inherent strength, temperature toughness and oxidation resistance properties. It boasts superior hot strength when compared with all known refractory bodies while showing lower wear rates than special steels in all soil conditions tested.

NBSCs are created by intimately mixing dry silicon powder of an impalpably fine texture with SiC powder, then shaping into a moldable mass. They are then fired in an atmosphere which does not permit oxygen, to transform most of the silicon to silicon nitride.

High wear resistance

Nitride-bonded silicon carbide is a tough material designed to withstand high temperatures while still offering mechanical strength and good abrasion resistance, making it an economical solution for applications requiring high wear resistance.

Nitride-bonded silicon carbide outperformed XAR 600 steel, F-61 padding weld and 38GSA steel in all of the soil conditions tested; particularly, light soil conditions with loose grains of sand.

NBSC bricks are ideal for use in various refractory applications, including hearth plates, recuperator tubes, pusher slabs, girders, stub outs and stringers in kiln furniture. Their versatile nature enables casting into large, complex shapes while their chemical and thermal shock resistance makes this material suitable for industrial settings.

High thermal shock resistance

Nitride-bonded silicon carbide is widely recognized for its superior thermal shock resistance, making it useful in demanding environments. Furthermore, its ability to withstand abrasion in different soil conditions and high abrasive wear resistance make it superior than steels and boron steel materials used as work parts to work soil masses; however, special-shaped materials do not transmit compressive loads as effectively.

Nitride-bonded silicon carbide (NBSC) is produced in an electric furnace at controlled temperatures and pressures, and comes in various standard and custom sizes and shapes, along with various thicknesses. Due to its resistance against alkali erosion, water vapor oxidation resistance, thermal shock resistance and corrosion protection properties it makes an excellent material choice for use in iron blast furnace stacks, bells, boshes and tuyeres.

High oxidation resistance

Nitride-bonded silicon carbide is an advanced refractory material and structural material with numerous beneficial characteristics, including high strength at elevated temperatures, exceptional erosion resistance, thermal shock resilience, oxidation resistance and the ease of sintering processes that allows intricate shapes to be easily formed into intricate designs.

This material offers high load-bearing capacity and exceptional corrosion resistance against acids, molten salts, and halogens. Furthermore, its resistance to brittle cracking makes it a good option.

Aluminum composite material (ACM) offers good resistance against abrasion in loose soil conditions but may not compare favorably to steel and padding weld against impact wear. Abrasion resistance increases with grain size and coating type. ACM can be found used for kiln furniture applications in high temperature metallurgical processes while its excellent oxidation resistance makes this an invaluable material in high temperature situations.

High strength

Nitride-bonded silicon carbide boasts extremely high strength, making it an excellent material choice for precision technical ceramics. Furthermore, this material features low thermal expansion rates, making it suitable for mirrors for astronomical telescopes.

Resistance to brittle cracking in ceramic is linked to its grain size distribution, and ceramic showed less intensive wear than steel in all conditions studied, with heavy soil showing 9x less intense wear compared to 3x in medium soil conditions.

Nitrogen bonded silicon carbide (NBC) refractories are cast refractories typically used to form complex shapes using various techniques, including uniaxial pressing and slip casting. Both techniques have their own set of benefits: uniaxial pressing allows for high production efficiency but is limited to simple geometry shapes; slip casting enables green shapes but requires time for drying before demolding occurs.

Low density

Nitride-bonded silicon carbide (NBSiC) is an exceptional composite refractory material, offering exceptional thermal shock, oxidation resistance and high strength properties. Furthermore, NBSiC resists wetting by nonferrous metals molten into it during melting processes; unlike natural moissanite which occurs only rarely in meteorites, corundum deposits or kimberlite; most NBSiC sold worldwide today is manufactured synthetically.

NB SiC can be produced through nitridation, in which a mixture of silicon carbide and nitrogen-containing compounds are heated at high temperatures to form dense and consolidated materials. The process can be conducted using two distinct forming methods: uniaxial pressing and slip casting. While uniaxial pressing yields simple geometric compacts while slip casting produces complex-shaped ceramic green parts with unique structures; their density depends on solids loading and binder content in their respective slurries.