Nitride Bonded Silicon Carbide for Superior Hardness and Strength
Nitride Bonded Silicon Carbide provides an unrivalled combination of mechanical strength, thermal stability and chemical resistance, in addition to excellent wear- and oxidation-resistance.
Refractory brick and kiln furniture applications requiring high oxidation resistance must feature superior material with no wetting issues from nonferrous metals and low thermal expansion rates. Its superior oxidation resistance makes this choice stand out among its competition.
Superior Hardness
Nitride-bonded silicon carbide offers superior mechanical strength, creep resistance, thermal stability and chemical resistance at elevated temperatures, along with superior thermal stability. It has excellent resistance to acids, molten salts and halogens which may cause corrosion; furthermore it features one of the highest hardness values among engineering materials; therefore proving highly wear resistant against both soft particles and hard surfaces.
Reaction bonded silicon carbide is a superior ceramic material with unparalleled properties, used across a wide variety of demanding industrial applications from tableware to sanitaryware, high temperature furnaces and chemical processing equipment.
Nitride bonded silicon carbide can be produced by mixing silicon of desired fineness with silicon carbide grains and molding the mixture into a mass or shape before drying and firing in an atmosphere that does not promote oxygen oxidation at temperatures and time needed to convert substantially all of it into silicon nitride, producing a body consisting of silicon carbide grains held together by their nitride bond refractory that exhibits many distinctive properties unattainable with conventional clay bodies.
Superior Strength
Nitride-bonded silicon carbide boasts outstanding strength and toughness even under heavy loads or impacts, and is resistant to most chemicals including acids and alkalis; making it suitable for use in environments where there may be corrosion issues. Furthermore, this material resists thermal shock well allowing rapid temperature changes without cracking or fracture.
NB SiC is manufactured through the process of nitridation, in which silicon carbide powder and nitrogen-containing compounds (such as silicon nitride or ammonia) are heated together under conditions with plenty of nitrogen gas to create a ceramic phase that bonds SiC grains together, producing dense and mechanically strong composite material.
NB SiC comes in various shapes, sizes and profiles to meet specific customer requirements. Thanks to its combination of mechanical strength, thermal stability, chemical resistance, wear resistance and chemical inertness properties, NB SiC makes an invaluable companion in applications from chemical processing tools to high temperature furnaces.
Excellent Resistance to Corrosion
Nitride-bonded silicon carbide stands out among engineering materials as having one of the highest load-bearing capacities and temperatures without losing strength, plus resistance against creep and oxidation.
Studies have demonstrated that bodies in which all the silicon is converted into silicon nitride during the nitriding process display superior electrical resistance properties when compared with commercial bonded silica bodies fired for one hour at 1000deg C. Additionally, these bodies feature excellent mechanical properties and moldability as they can be formed into intricate shapes without becoming difficult or expensive to mold.
Silicon carbide is an ideal material for structural applications in high temperature furnaces, such as kiln furniture that supports green refractory ware, such as supporting green refractory ware. Thanks to its superior corrosion-resistance, silicon carbide makes an excellent material choice for protecting thermocouples from direct flame impingement – perfect for protecting primary thermocouples made of mullite or alumina from direct flame impingement – or protecting weld pins and insulator components from direct flame impingement! Additionally, oxide-bonded silicon carbide offers better wear resistance than oxide-bonded silicon carbide, providing better wear resistance than oxide-bonded silicon carbide for weld pins insulator components or weld pins compared with oxide-bonded silicon carbide.
Excellent Wear Resistance
Nitride Bonded Silicon Carbide (NBSC) is an advanced refractory material, boasting superior strength and thermal stability with chemical resistance properties as well as wear resistance properties that make it suitable for a range of demanding applications such as high temperature furnaces and chemical processing tools.
Nitriding transforms silicon carbide into an inert nitride phase with atomic substitution, making it extremely hard and strong. Furthermore, this protective nitride coating protects it against corrosion for reduced maintenance costs and downtime.
NBSC boasts outstanding thermal shock resistance and can withstand rapid temperature changes, making it the ideal material for use in aluminum furnace linings, kiln furniture production facilities, and waste incineration plants.
NBSC is also an ideal material choice for refractory shapes that require withstanding the effects of abrasion. Tests have revealed that nitride-bonded silicon carbide exhibits strong impact wear resistance in light soil conditions; however, in heavier soil conditions its performance declines and it becomes limited in its usage.