Silicon carbide ceramic tiles and lining can significantly extend equipment lifespan in harsh wear environments and boost production efficiency while decreasing enterprise costs. ResisTek’s Reaction Bonded Silicon Carbide (RBSC) features exceptional hardness, corrosion and abrasion resistance with tight dimensional tolerances ensuring long term use in production environments.
Reaction bonded silicon carbide differs from aluminum nitride in that its strength remains unaffected at elevated temperatures, as well as withstanding acids and alkalis with ease.
Hardness
Ceramic materials such as alumina and silicon carbide owe their hardiness to their crystalline structures, which allow for superior mechanical strength, flexural and tensile strengths, corrosion and abrasion resistance, making ceramics suitable for demanding applications where durability is key.
Advanced wear-resistant ceramics such as alumina and silicon carbide can withstand intense erosion, corrosion or abrasion environments without suffering significant degradation to equipment or substrate. Furthermore, these ceramics can withstand elevated temperatures while still maintaining their properties, making them an excellent choice for industrial processing applications.
Silicon carbide (SiC) is an extremely hard, brittle and tough technical ceramic with Moh’s hardness rating of 9; it provides outstanding corrosion and abrasion resistance and has up to six times longer service life than 92% alumina linings. Reaction bonded silicon carbide ceramic (RBSC) also boasts exceptional mechanical properties at room temperature; such as high flexural strength, good impact resistance/abrasion resistance/corrosion resistance as well as anti-oxidation and electrical insulation properties.
Laser surface treatment of alumina and silicon carbide has been demonstrated to increase their adhesive bond strength with epoxy composites, both during quasi-static tests as well as ballistic experiments. Furthermore, failure loci were observed within ceramic itself rather than at its interfaces.
Corrosion Resistance
Silicon carbide (SiC) is an advanced ceramic material with superior chemical and erosion resistance, high strength, thermal stability, thermal expansion controls and minimal expansion for use in severe wear environments that need a material with exceptional wear protection from excessive abrasion or corrosion. SiC features great thermal stability as well as minimal expansion rates that produce minimal coefficient of friction for minimal expansion costs and increased equipment longevity.
SiC boasts a unique crystalline structure that allows it to maintain strong mechanical strength at temperatures as high as 1600 deg C while remaining less sensitive to oxidation than other engineering ceramics. Furthermore, its ionic bond has only around 12-14% ionic character that’s unaffected by impurities present – making it an excellent material choice for industrial use.
Reaction bonded SiC, more commonly referred to as RBSC, is an advanced ceramic that can be utilized in harsh wear applications. Boasting an impressive hardness of Moh’s 9 and an elastic modulus of 2.9 GPa, RBSC makes for an excellent wear-resistant material in environments that exhibit extreme abrasion. Furthermore, its low elastic modulus makes RBSC easy to work with; lathes, milling machines and drills are commonly used to machine it.
Studies have proven that RBSC ceramics outshone Al2O3-based ceramics in terms of chemical and erosion resistance. Furthermore, it was easier to machine and handle, making RBSC an economical alternative to more costly materials like titanium.
Abrasion Resistance
Abrasion resistance should always be considered when selecting ceramics for wear applications, and both alumina and silicon carbide ceramics excel in this application. Alumina ceramics boast an excellent hardness rating while greatly outperforming most metals in abrasion tests – in one test where small glass beads were continuously sprayed onto both samples for eight hours, the alumina ceramics showed only 10 percent of the wear seen on metal samples.
Laser processing of the alumina ceramics used for this test added further abrasion resistance and surface roughening to an already durable material such as alumina.
To achieve this, laser ablation was used at various depths to expose different amounts of surface material. Tiles were then attached to precured panels of composite material using polyurethane glue – an adhesive widely used and reliable for this type of application.
Silicon carbide was similarly laser ablated at various depths to achieve surface characteristics similar to that of untreated alumina, with bond strength improvement significantly outpacing that seen with untreated material. This supports the hypothesis that laser processing enhances an adhesive’s ability to form strong, long-term bonds with it.
Thermal Conductivity
Thermal conductivity measures the ability of materials to transfer heat through their surfaces. It depends on their particle composition and density as well as packing. A material with higher particle density and larger particles should have lower thermal conductivity compared with those containing smaller ones; temperature exposure also plays an impactful role. In general, higher particle densities will have lower thermal conductivities while liquid or gas materials typically exhibit the highest ones.
Alumina and silicon carbide ceramics have the capability of withstanding abrasion and corrosion while remaining hard at high temperatures, with excellent resistance to acid, alkali, and oxidative environments – up to 1000 centi-degree Celsius! Additionally, these advanced materials have low coefficient of expansion making them suitable for load bearing applications.
Alumina and silicon carbide can both be utilized as protective armour layers to extend equipment lifespans in harsh wear environments while increasing production efficiencies and decreasing enterprise costs. They are commonly integrated into linings for cyclones, tubes, chutes, and hoppers as a measure against impact and abrasion while still preserving system design and functionality. ResisTek offers 92% purified alumina ceramic as the solution to applications requiring high abrasion and corrosion resistance.