Silicon carbide (SiC) is one of the hardest technical ceramics, second only to diamond on Mohs’ Hardness scale. It boasts excellent corrosion-resistance and thermal conductivity/insulation qualities as well as electrical insulation properties.
Since it is originally manufactured from an electro-chemical reaction of silica and carbon, it has evolved into one of the most advanced structural ceramics with applications in national defense, aviation, metallurgical machinery production, microelectronic devices and aerospace.
Temperature Resistance
Silicon carbide ceramic is a material with exceptional thermal and mechanical properties. Able to withstand high temperatures without incurring damage, it is often utilized in kiln components, furnaces and other equipment. Furthermore, its corrosion-resistance, high flexural strength and modulus of elasticity make it suitable as bulletproof armor component material.
Ceramic mesh is a three-dimensional porous ceramic material featuring uniform pore distribution, small relative density, large specific surface area, selective permeability to liquid and gas media as well as excellent energy absorption properties and pressure resistance properties that make it suitable for use in many fields such as metallurgy, chemical industry, transportation machinery, national defense, environmental protection, biology etc.
Dense SiC stands out as having superior flexural strength and fracture toughness when compared with conventional ceramic materials, with its flexural strength more than double that of steel; and its tensile strength exceeding those of titanium, aluminum and alumina but lower than that of alumina.
Dense silicon carbide can be produced using either reaction sintering or the use of oxygen-free sintering aids, with each method and additive having an impactful result in terms of microstructure and mechanical properties, particularly for products that require precision machining processes such as shaped ones.
Corrosion Resistance
Silicon carbide is one of the hardest and lightest advanced ceramic materials. Found naturally as moissanite mineral, synthetic silicon carbide grains are fused by sintering into very hard ceramics for manufacturing purposes. Silicon carbide offers superior corrosion-resistance for liquid or gaseous chemicals with pH values from 3-14; excellent erosion-abrasion resistance; low coefficient thermal expansion rates; good chemical stability and high mechanical strength make this material highly prized in industrial settings.
Corrosion of silicon carbide occurs in diverse environments, including dry and moist oxygen environments, mixtures of hot gases with oxidants, molten metals, or complex environments such as coal slags. Corrosion depends on both its physical properties and environmental reaction sequences to occur in any given setting.
Silicon carbide corrosion often exhibits parabolic kinetics, related either to its surface oxide layer or to complex environmental reactions. SiC corrosion rates depend upon how permeable its oxide coating is to oxygen molecules; whether other oxidation barriers exist; temperature, diffusion rate of oxygen into silicon carbide surfaces and more.
Foamed silicon carbide features an advanced three-dimensional network structure with high porosity, low pressure and selective permeability properties for liquid and gaseous media, providing it with excellent physical, electrical, magnetic optical and chemical functions that make it suitable for many industries, including metallurgy, petroleum engineering transportation machinery national defense aviation aerospace biological. It finds widespread application throughout these fields.
Wear Resistance
Silicon carbide ceramic is one of the hardest and lightest advanced materials, second only to diamond. It boasts outstanding physical wear resistance that makes it a prime candidate for applications where wear resistance is of primary concern, such as shot blast nozzles. Furthermore, this material exhibits exceptional abrasive and erosion resistance as well as low thermal expansion coefficient that makes it suitable for high temperature environments.
Silicon carbide ceramic has exceptional chemical and physical properties that make it a versatile structural material, and are widely applied across a range of fields such as national defense, military industry, environmental protection, chemical machinery and semiconductor technology. Furthermore, silicon carbide ceramic is also key material used in producing industrial refractory bricks as well as serving as high temperature kiln material in roller, tunnel and shuttle kilns.
Ceramic materials’ excellent mechanical properties (hardness, flexural strength and compressive strength) and corrosion resistance enable them to maximize equipment performance and extend service life – this is particularly essential in chemical processing industries where operating levels, uptimes and waste reduction are of vital importance.
SiC is also widely used in high-temperature furnace components such as SiC beams and cooling tubes, due to its exceptional high-temperature strength, creep resistance, thermal conductivity, thermal shock resistance and shock absorption properties. Due to this unique combination, static hot sections in rockets, airplanes, car engines and gas turbines often rely on SiC for static hot sections.
Thermal Shock Resistance
Silicon carbide possesses exceptional thermal shock resistance due to its unique lattice structure of carbon and silicon atoms bonded together in an intricate lattice network, giving rise to properties such as hardness, mechanical strength, low density, elastic modulus and inertness while remaining thermal expansion-free – giving rise to significant mechanical and chemical stability even under intensely hot environments.
silicon carbide ceramics’ ability to withstand extreme temperatures has made them an excellent choice for applications including hot gas filtration, heat exchangers and high structural materials. Silicon carbide also boasts excellent corrosion resistance, oxidation resistance, compressive strength and thermal shock resistance properties that make it the go-to material for filtration applications as well as heat exchangers and high structural materials.
Saint-Gobain offers a comprehensive range of high performance refractory ceramics such as Hexoloy and SIC that can help reduce maintenance costs, boost production throughput and increase overall operating efficiencies. These cutting edge products help save businesses money through reduced maintenance expenses and higher throughput rates as well as better efficiency across their operations.
Silicon carbide is one of the world’s hardest materials, second only to diamond and cubic boron nitride. Due to its superior strength, silicon carbide makes an excellent material choice for applications including abrasives, grinding wheels, machining tools and cutting tools. Furthermore, silicon carbide furnaces can use it to improve combustion process while lowering power consumption resulting in lower energy bills and reduced environmental impacts; furthermore it is often employed for nuclear technology and aerospace applications.