High Temperature Corrosion Of Oxide Bonded Silicon Carbide
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Silicon Carbide Plate/Oxide Bonded Silicon Carbide Refractory Products Silicon carbide products have the excellent properties of high bending strength following rising temperature thermal shock resistance oxidization resistance corrosion resistance and so on The series of products are widely used in the sealing equipment and slipping equipment for the fields of metallurgy chemical
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Although the SiC nanopowder sintering typically requires relatively high processing temperature ∼1850 °C and applied pressure of ∼10 MPa this class of SiC joint exhibited the highest apparent shear strength among the different types of SiC joints
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Description Excel E is a high quality carbon bonded silicon carbide crucible manufactured using the latest roller forming techniques and incorporating a special multi phase glaze protection system This product range is designed for aluminium melting and holding applications EXCEL E is
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OSTI GOV Journal Article High temperature mixed oxidation of nitride bonded silicon carbide in oxidizing gas mixtures containing 2 Cl sub 2
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Reaction bonded silicon carbide is a multi phased material typically containing 7 15 silicon metal some minor amount of unreacted carbon with the remaining body being SiC Reaction bonded SiC materials are manufactured utilizing a variety of processes depending on desired final product geometry configuration and required tolerances
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Combined with its high thermal conductivity and superb corrosion resistant properties silicon carbide ceramics are workhorse materials for challenging application areas At International Syalons we offer high performance silicon carbide ceramics via reaction bonding and sintering
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HALSIC is the name of four exceptional high performance ceramics from the silicon carbide SiC material group made by W HALDENWANGER They share the following characteristics absolute dimensional stability despite extreme mechanical strain in high temperature applicationsvery good thermal shock resistanceexcellent high corrosion resistancelow specific weight
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Silicon nitride bonded silicon carbide has excellent wear resistance even at high temperatures and is also known for its corrosion resistance and thermal shock resistance Silicon nitride bonded silicon carbide also has ideal refractory and chemical properties NBSC resists wetting by non ferrous metals
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The oxidation characteristics of reaction bonded silicon carbide electroheating material were studied at 1 100 1 580 ℃ in air The result indicates that when the heating temperature is over 1 420 ℃ the remnant Si in substrate melts and flows to the surface to form the silica The combination of silica and the surface oxide layer enhances the compactness of the surface oxide layer which
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Chemical Industry Silicon Carbide Oxide Bonded Refractory Sic Firebrick Silicon carbide products have the excellent properties of high bending strength following rising temperature thermal shock resistance oxidization resistance corrosion resistance and so on The series of products are widely used in the sealing equipment and slipping equipment for the fields of metallurgy chemical
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NItride bonded Silicon Carbide Tubes mainly used as thermocouple protection tube in aluminium molten bath Nitride bonded silicon carbide tubes SCN have the same characteristics as Oxide bonded silicon carbide with a few exceptions They have a maximum service temperature of 2800°F 1550°C
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Damage of SiC oxide bonded refractories in waste to energy facilities WtE has been characterized Different phenomena were observed wear by slag phases volume expansion of tiles and fracture in different locations These results are in agreement with laboratory experiments The role of gas composition and tiles temperature profile on deposit composition on condensation of gaseous alkali
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Sic Oxide Bonded Silicon Carbide Kiln Plates Silicon carbide products have the excellent properties of high bending strength following rising temperature thermal shock resistance oxidization resistance corrosion resistance and so on The series of products are widely used in the sealing equipment and slipping equipment for the fields of metallurgy chemical industry pharmaceuticals
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Silicon Carbide Silicon carbide SiC is one of the hardest technical ceramics available For many years it was second only to diamond on the Mohs scale and to date sintered silicon carbide remains both a competitive and supplementary material for abrasive synthetic diamonds Combined with its high thermal conductivity and superb corrosion
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Reaction bonded silicon carbide is a multi phased material typically containing 7 15 silicon metal some minor amount of unreacted carbon with the remaining body being SiC Reaction bonded SiC materials are manufactured utilizing a variety of processes depending on desired final product geometry configuration and required tolerances
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Oxide Bonded Silicon Carbide O SiC O SiC is used for firing general chinaware and ceramic product temperature below 1 450°C is made by SiC bonded by Silicon Oxide Si2O3 and technically called Oxide Bonded Silicon Carbide This SiC refractory has very high thermal conductivity almost 10 times higher than mullite
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Typical conditions for reactors are temperatures of around 1300 °C with a maximum temperature of 1600 °C and pressures of 25–40 bar as well as typical gas compositions of 55 –60 CO 30 –35 H 2 10 –15 CO 2 and 0 4 –1 5 H 2 S 1 6 13
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Kim WJ Hwang H S Park J Y Corrosion behavior of reaction bonded silicon carbide ceramics in high temperature water Journal of Materials Science Letters 21 733–735 2002 https //doi/10 1023/A Download citation Issue Date May 2002 DOI https //doi/10 1023/A
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Oxide boned silicon carbide OSiC ceramic refractory sic plates with high loading capacity have superior properties such as high temperature resistance corrosion resistance high bending strength the thermal conductivity of oxide bonded silicon carbide is 10 times than cordierite and high alumina kiln shelves which is widely used in construction ceramics sanitary ceramics daily ceramics
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The effects of temperature and gas composition on the mechanical properties of sintered a SiC heating elements were studied during the pre melting stage of Si rich ashes resulting from the co combustion of biomass and coal in a high temperature 1600C furnace The use of elevated temperatures approximately 1600oC for the pre melting of the ashes in combination with the composition of the
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oxide nitride or carbide compounds In the reac tion bonding technique carbon siHcon metal sili con nitride or other powders may be mixed with silicon carbide powder and allowed to react at high temperature The resulting ceramic is generally a multiphase material that also may have a bimodal SiC grain size distribution
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Silicon Carbide SiC ceramics have wide applications in the fields of ceramics glass ceramics industrial kilns automobiles metallurgy petroleum chemical steel machinery electric power aerospace etc Unique key characteristics of SiC High mechanical strength at both room and high temperatures Ultrahigh thermal shock resistance
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Corrosion behavior of reaction bonded silicon carbide ceramics in high temperature water Weon Ju Kim 1 Ho Soo Hwang 1 Ji Yeon Park 1 Journal of Materials Science Letters volume 21 pages 733–735 2002 Cite this article
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The U S Department of Energy s Office of Scientific and Technical Information
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Takayuki Narushima Takashi Goto Yoshio Yokoyama Yasutaka Iguchi and Toshio Hirai High‐Temperature Active Oxidation of Chemically Vapor‐Deposited Silicon Carbide in CO─CO2 Atmosphere Journal of the American Ceramic Society 76 10 2005
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oxide nitride or carbide compounds In the reac tion bonding technique carbon siHcon metal sili con nitride or other powders may be mixed with silicon carbide powder and allowed to react at high temperature The resulting ceramic is generally a multiphase material that also may have a bimodal SiC grain size distribution
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Taking silicon carbide as the main material and adding expansion agent and anti oxidant 1400 C oxide bonded silicon carbide SiC board /slab SIC plate as kiln shelves have very high load softening temperature and excellent anti oxidative effect through vibration supported uniaxial press compaction and high temperature firing It was
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Corrosion Resistance The corrosion resistance of Hexoloy SA SiC permits superior performance in environments of hot gasses and liquids including strong acids and bases even at extremely high temperatures The results below indicate that by compari son Hexoloy SA SiC outperforms tungsten carbide and aluminum oxide in all chemical categories
Get PriceAlkali Induced Corrosion of Silicon Carbide Heating
The effects of temperature and gas composition on the mechanical properties of sintered a SiC heating elements were studied during the pre melting stage of Si rich ashes resulting from the co combustion of biomass and coal in a high temperature 1600C furnace The use of elevated temperatures approximately 1600oC for the pre melting of the ashes in combination with the composition of the
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SiC Oxide bonded Silicon Carbide plates/Slabs/Batts Silicon carbide products have the excellent properties of high bending strength following rising temperature thermal shock resistance oxidization resistance corrosion resistance and so on The series of products are widely used in the sealing equipment and slipping equipment for the fields of metallurgy chemical industry pharmaceuticals
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However when the temperature was increased from 1300 °C to 1500 °C the mass increased due to the diffusion of oxygen molecules through the silica layers into the silicon carbide layers In short the highest temperature that can be used for RBSC porous ceramics prepared in this method is 1500 °C
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oxide bonded SiC membrane supports in which oxide bonding phases were introduced to lower sintering temperature such as mullite cor dierite silica glass frit and so on 18–21 However the addition of those oxide aids would deteriorate high temperature strength and corrosion resistance of the final SiC membrane supports 7 Solid state
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Properties of Silicon Carbide SSiC SiSiC Low density 3 07 to 3 15 g/cm 3 High hardness HV10 ≥ 22 GPa High Young s modulus 380 to 430 MPa High thermal conductivity 120 to 200 W/mK Low coefficient of linear expansion 3 6 to 4 1x10 6 /K at 20 to 400°C Maximum operating temperature of SSiC under inert gas 1 800°C
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Nitride bonded silicon carbide ceramics have lower processing costs than many other SiC based ceramics and adequate properties for use as high temperature heat exchangers in oxidizing environments Silicon nitride has much better resistance to attack by chlorine at temperatures above 900 C than silicon carbide
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Corrosion mechanisms in oxide bonded silicon carbide tiles On the other hand the crystallization of the para wollastonite in the whole porosity on the hot face of the refractory tile with a thermal expansion 7–8 10 −6 /°C 28 coefficient higher than that of SiC 5 10 −6 /°C may lead to severe mechanical damage as well
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Schematic illustration of SiC oxide bonded tiles corrosion in WtE facilities Calcium sulphate and alkali compounds CaSO 4 K 2 SO 4 Na 2 SO 4 and HCl NaCl condense as molten salts on the hot face of the tile 800–900 °C
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