Nitride Bonded SiC

Nitride-bonded sic is an outstanding material for wear-resisting applications, yet its resistance to brittle cracking may be limited due to uneven grain size distribution in abraded material.

This study evaluated the abrasive wear resistance of nitride-bonded sic under various soil conditions and compared these results with steel and padding weld commonly found in soil working parts.

High Temperature Strength

Nitride-bonded sic is capable of maintaining its strength at high temperatures, making it an excellent way to withstand chemical and mechanical degradation under extreme operating conditions. As such, this material makes for ideal applications where materials must remain stable and functional at elevated temperatures.

RB SiC is widely utilized in furnaces and kilns where temperature, normal strength and corrosion resistance are crucial – such as tunnel and shuttle kilns used to produce ferro silicon, steel and nonferrous metals. Furthermore, its hardiness allows it to resist erosion caused by slag, water vapor or other means.

RB SiC can also be used in the construction of components requiring high dimensional stability and mechanical strength, such as pumps, shaft seals and bearings. When manufacturing these items, the material may be combined with alumina to increase fracture toughness and thermal shock resistance.

Nitride-bonded sic offers another advantage over conventional steel; it can be produced into near-net shapes without grinding or other finishing processes, making it particularly cost effective. Duratec offers several RBSiC products such as CarSiK-G, CarSiK-Z, CarSiK-GD and CarSiK-NT that come in various thicknesses for applications that demand it – each providing exceptional normal and high temperature strength as well as resistance against corrosion wear and radiation damage.

Extreme Hardness

Nitride-bonded sic is one of the hardest materials on Earth. It offers exceptional abrasion resistance even in water environments, making it suitable for mining applications. Furthermore, this material makes an excellent lining material for furnace walls or equipment in harsh environments.

NBSIC not only stands out for its strength but also has an economical coefficient of expansion and chemical inertness, making it relatively unaffected by harsh environments like acidic and alkaline solutions, thereby decreasing maintenance costs and downtime.

NBSIC is typically formed through the reaction of silicon powder with ammonium in an oxygen-free atmosphere, producing various forms of refractory shapes such as ceramics and castable liners. It’s an excellent material to use as kiln furniture; its high thermal conductivity makes it great for heating elements; plus it makes ideal refractory bricks with superior oxidation resistance and thermal shock resistance.

Field tests conducted to test soil erosion revealed that the abrasion resistance of nitride bonded sic was significantly higher than steel in light and medium soil conditions, wearing out only about 1.2 times more intensively than XAR 600 steel in heavy soil conditions and nine times less than steel types intended for padding weld use.

Excellent Wear Resistance

Nitride-bonded sic is an exceptional engineering material. With one of the highest hardness values among engineering materials and outstanding wear resistance even at elevated temperatures, this high-performance material boasts one of the highest hardness values among engineering materials – making it perfect for wear-resistance at high temperatures. Furthermore, this material features corrosion and thermal shock resistance, perfect refractory properties as well as ideal chemical and refractory characteristics; furthermore it resists wetting by nonferrous metals while remaining a semiconductor at high temperatures.

Engineered textile materials boast one of the highest abrasion resistance values among engineering materials and excel in various test methods, making it suitable for use in harsh applications such as mining, petrochemical plants, red metal processing plants and monolithic cyclone liners.

Though these impressive properties make nitride-bonded sic an attractive material choice, its resistance to tribological wear decreases with increasing grain size. Therefore, large-sized abrasive particles may reduce durability; smaller-sized particles would thus be preferable.

NBSC is created through a complex manufacturing process involving reactive bonding and infiltrating of molten silicon into porous carbon material packed in desired shape. The end product boasts high thermal and chemical stability as well as being easily fabricatable into various shapes and sizes – commonly found in pumps, mechanical seals, bearings, linings, flow control chokes, larger wear components for mining applications.

Chemical Resistance

Nitride-bonded silicon carbide boasts impressive chemical resistance, repelling aluminum melts and being well suited for use in Aluminum electrolysis cells (WTE). Furthermore, this material offers good corrosion and wear resistance from copper and aluminium slags, as well as being highly resistant to water vapor oxidation and alkali erosion.

These characteristics make nitride bonded sic an indispensable material in numerous demanding applications in fields like steel, machinery, electrical power and aerospace. For instance, it can be used as an accurate temperature measuring thermocouple protection tube in high temperature environments for accurate temperature readings and extended thermocouple life; or used as furnace linings/kiln furniture because of its resistance to thermal shock and oxidation.

NB SiC is produced through direct nitridation of SiC grains with a nitride ceramic phase to form a dense structure. To obtain desired properties, SiC-to-nitride ratio, temperature and time parameters must be optimized accordingly to obtain desirable results. Nitride bonded silicon carbide exhibits excellent fracture toughness, thermal conductivity superiority compared to sintered SiC as well as higher abrasion resistance indexes and cracking resistance values than sintered SiC, along with increased erosion protection from hard particles or surfaces and high impact resistance properties compared to sintered SiC.