Silicon carbide tube is made of ceramic material used to protect thermocouple tubes in high temperature furnace applications. They have excellent corrosion resistance and thermal conductivity properties, providing added protection to thermocouples during high temperature furnace operation.
Castable ceramic can be produced in various shapes via casting, dry press, isostatic pressing and injection molding processes, with varieties including oxide bonded, nitride bonded and carbon bonded (isopressed) available.
Hardness
Silicon carbide ceramic has the same hardness as diamond, making it one of the strongest industrial materials available. As it features low thermal expansion and resistance to acid corrosion, as well as being lightweight and chemically stable - which make it perfect for various applications as it resists both abrasion and erosion.
Silicon carbide ceramics have an array of applications in industries such as power generation, coal chemical industry, metallurgy and mining. Produced through hot pressing or sintered processes that guarantee superior mechanical properties and uniformity are often suitable for high voltage/high power applications while their excellent thermal conductivity makes them suitable for higher temperature processes.
Silicon carbide boasts an exceptionally durable Mohs hardness rating of 9, which rivals that of diamond, making it an excellent material choice for blasting and grinding applications. Furthermore, due to its recycling ability and environmental advantages, silicon carbide was considered to be the hardest synthetic material until boron carbide came along a decade later.
Based on its production method, silicon carbide hardness varies between reaction bonded and pressureless sintered varieties. Reaction bonded silicon carbide tends to be cheaper to produce with finer grains, lower use temperatures and abrasion resistance. By contrast, pressureless sintered versions feature higher strength/hardness ratings while being capable of withstanding higher temperatures.
This material comes in a wide variety of shapes and sizes, such as tubes, rings, tee pipes, cone cyclones, elbows and more. With excellent thermal conductivity and wear resistance properties that make them the ideal material choice for many applications in metallurgy and power plants such as elbow pipes - providing reliable abrasion-resistant elbow pipes; long service lives that are easily installed; insulation to prevent leakage; lightweight properties ideal for high temperature environments - this material also makes an excellent addition.
Corrosion resistance
Silicon carbide ceramic is a durable material with excellent corrosion resistance. It does not react with acid, resist thermal shock, oxidation and chemical degradation as well as thermal shock - making it the ideal material for protecting applications from corrosion and erosion such as beams, cooling air tubes, thermocouple protection tubes, temperature sensors, burner nozzles or any other special-shaped structural parts.
Corrosion is a progressive process that gradually degrades materials through surface flaws and weak spots, ultimately weakening them over time and decreasing strength in service. Corrosion processes are particularly problematic in complex environments; nevertheless, we have made significant strides toward understanding their mechanisms while isolating specific environmental components affecting SiC corrosion behavior.
Sintered silicon carbide's superior corrosion resistance is attributable to its hard surfaces, which are easily machined for smooth finishes with low coefficients of friction and wear resistance compared to tungsten carbide or alumina materials. Sintered silicon carbide makes an excellent choice for demanding applications like handling acid solutions in high concentration or rare earth processing, as well as handling chemicals containing hydrofluoric acids or rare earth processing. Furthermore, its wear resistance in acidic environments makes it superior than both these options.
Sintered silicon carbide is an ideal material for making valves, as it can be machined into precise shapes with ease. Furthermore, its hardness and low porosity ensure it can withstand heavy-duty applications with little risk of cracking under stress. Furthermore, sintered silicon carbide offers greater corrosion resistance than its reaction bonded counterpart which may also be used.
Pressureless sintered silicon carbide is an ideal choice for shell and tube heat exchangers in the chemical industry, due to its excellent resistance against acids (hydrochloric, sulfuric and hydrofluoric), bases (ammonia and caustic soda) and oxidizing agents like nitric acid. Furthermore, this material comes in various diameters and lengths (up to 4 meters).
Sintered silicon carbide boasts high temperature resistance, withstanding temperatures up to 1,400 deg C. Additionally, its Young's modulus exceeds 400 GPa providing exceptional dimensional stability.
Thermal conductivity
Silicon carbide possesses excellent thermal conductivity, low thermal expansion and corrosion resistance properties that make it suitable for high temperature sensors and systems that require fast response times. Furthermore, its toxicologically safe nature means it can even be used in food industry applications. Furthermore, this material possesses good abrasion and wear resistance making it suitable for many metallurgy industry applications including lining large blast furnaces as well as transporting coal, steel, iron ore and other raw materials; chemical industries papermaking as well as pipeline system components all utilize silicon carbide components.
Materials made of this lightweight yet impact-resistant material can serve as a replacement for metal in applications where resistance against abrasion and impact are key, including grinding tools and ballistic missiles, providing superior bullet protection from bullets and shrapnel. Furthermore, its resistance to chemicals - specifically acids - and temperature fluctuations makes for easy handling and installation processes.
Silicon carbide is an exceptional thermal conductor and corrosion-resistant ceramic material. Not only is it suitable for high temperatures, with its low melting point and ease of machining to precise dimensions, it is also versatile enough to be made into rods, bars, rings, pellets targets for thin film deposition as well as machined shapes - American Elements offers standard diameter silicon carbide tubes as well as custom made materials to your exact specifications.
Silicon Carbide tube is manufactured by firing high-purity green SiC powder at high temperature in an oxygen-free atmosphere and at an oxygen-depleting atmosphere, producing dense structures with high hardness and low porosity. The resultant product can be formed into various shapes, such as plain tube, straight pipe, tee pipes, nozzle, burner cylinder or other unique structures. Reaction bonded and nitride bonded versions of this material are available, with reaction bonded versions providing coarser grain structures and the latter boasting higher hardness, lower use temperature and superior corrosion resistance than its reaction bonded counterpart. Their thermal diffusivity depends on microstructure, porosity and impurities present within their material composition.
Wear resistance
Silicon carbide tube is an excellent choice for use in high-temperature furnaces and thermocouple protection tubes, due to their resistance to corrosion, heat and wear as well as excellent thermal conductivity and light weight. There are various varieties of SiC tubes available: oxide-bonded, nitride bonded and carbon bonded (isopressed). Before selecting one for your application it is essential that you understand their differences before making your selection.
Oxide bonded silicon carbide thermocouple protection tubes are frequently employed as secondary shielding in oxygen atmosphere furnaces to protect Mullite or Alumina primary thermocouples from flame impingement, making these an excellent choice for use with nonferrous metals due to their resistance to oxidation and slag attack. They come in sizes and shapes ranging from 2mm diameter up to 30 mm diameter with lengths reaching up to 4.5 meters long - available now!
Nitride-bonded silicon carbide is an exceptional refractory material with excellent strength, hardness and chemical resistance. It can be machined into special parts such as screws and plates for applications involving acidic environments such as factories. Furthermore, this material withstands both acids and alkalis as well as strong vibration loads without succumbing to degradation.
Refractory ceramic pipe comes in various sizes and shapes, from straight tubes, tee pipes, elbows, rings and shrimp waist bends, all the way to being custom cut to length and flanged according to customer specifications. Wear life is three to five times greater than with ordinary carbon steel or cast stone pipes while providing superior performance price ratio.
Reaction bonded silicon carbide stands up well against both acids and alkalis, with particular success in environments with high concentrations of silt and dust. Due to its superior temperature strength and corrosion resistance, reaction bonded SiC can also be used in applications sensitive to abrasion such as mining, petrochemical manufacturing, aerospace applications and mining operations - in addition to being an ideal material choice for thrust bearings. Reaction bonded SiC can even be produced in various shapes such as screws, plates and impellers.