Hexoloy®Silicon Carbide Noralide®Silicon Nitride Ceramic Materials

Hexoloy® Silicon CarbideNoralide® Silicon NitrideCeramic Materials

Chemical processingHexoloy® SiC – A Superior Bearing Material For the MostDifficult Applications• Extreme Hardness and High Strength• High Abrasion and Wear Resistance• Excellent Corrosion Resistance• Superior Thermal Shock ResistanceClean room/semiconductor applicationsFood ProcessingSaint-Gobain Ceramics offers a family of Hexoloy® sintered alpha silicon carbidegrades, providing high performance materials that have proven successfulin a wide variety of applications and pump design types including:• Gear Pumps• Magnetically-driven Pumps• Canned Motor Pumps• Multi-stage Pumps• Vertical Pumps• Down Hole PumpsThe advantages of Hexoloy SiC• As one of the hardest commerciallyavailable materials, it provideswear resistant, long service life.• Its universal corrosion resistance offers abearing material with unlimited applicationpotential.Internal Gear Pumps – Hexoloy SiC bearings• Low friction and high strength characteristics deliver reliable performance in pumps usedin tank car unloading and other continuousresult in superior high PV performance.service applications• It has high thermal conductivity for excellentthermal shock resistance.• Net shape manufacturing capabilities eliminate costly machining operations.• Hexoloy SP’s unique spherical pore based lubrication provides the ability tosurvive marginal operating or upset conditions.There’s a Hexoloy® SiC Materialfor your bearing applicationHexoloy SA Silicon CarbideHexoloy SA SiC is a pressureless, sintered form of alpha silicon carbide,with a density greater than 98 percent theoretical. It has a very fine grainstructure (less than 10µm) for excellent wear resistance and contains nofree silicon, which makes it highly chemically resistant in both oxidizingand reducing environments. These abilities coupled with excellent surfacefinish characteristics make it ideally suited to product lubricatedbearing applications.

Hexoloy SP Silicon CarbideHexoloy SP SiC is a sintered alpha silicon carbide material designed specificallyfor optimum performance in sliding contact applications such as product lubricatedbearings. This material improves upon the exceptional corrosion and erosionresisting properties of Hexoloy SA SiC through the addition ofunique spherical pores. These discrete, evenly dispersed poresact as fluid or lubricant reservoirs helping to promotethe retention of a fluid film at the interface of slidingcomponent surfaces.Design AssistanceOur application engineers can help you withdesign recommendations that allow for cost-effectiveHexoloy SiC bearing solutions for your applications.Please contact us to discuss how Hexoloy SiC can benefityour bearing needs.Metering Pumps –Hexoloy SiC providesthe low wear requiredto maintain criticalclearancesKnoop Hardness (kg/mm 2 )3000250020001500HexoloySAReactionBondedSiCHardnessTungstenCarbideAluminumOxideFeatures of Hexoloy SiC BearingsWear ResistanceIn thrust and journal bearings, wear can occur due to upset conditions, abrasivefluids, shaft deflections and general abuse, ultimately causing a complete failureof the bearing. Hexoloy SiC is an extremely hard and wear resistant material. Itcan be used up to a PV limit of 500,000 psi ft/min when self-mated.Corrosion ResistanceHexoloy SiC exhibits excellent corrosion resistance over a broad range of pHvalues. It is chemically inert to strong oxidizers unlike tungsten carbide orreaction bonded silicon carbide. Hexoloy SiC outperforms tungsten carbideand aluminum oxide in all chemical categories.Mechanical and Physical PropertiesHexoloy SiC offers the optimal combination of mechanical and physical properties.The high strength and modulus of elasticity are complemented by low coefficientof thermal expansion and high thermal conductivity. This combination of propertiesallows the designer to build rigid, high load bearings while maintainingdesign clearances across a wide range of operating temperatures.Comp. Strength (s/rx10 3 m)Weight Loss in 53% HF (mg/cm 2 yr)20151051251007550250.2HexoloySAHexoloySACorrosion ResistanceReactionBondedSiCSpecific Compressive StrengthReactionBondedSiCTungstenCarbideTungstenCarbideAluminumOxideAluminumOxideSealless Magnetic Centrifugal Pumps – Hexoloy SiCbearings withstand highly corrosive, high temperaturechemicals handled by magnetic drive pumps

Material Properties – Typical ValuesNorth AmericaSaint-Gobain CeramicsStructural CeramicsHexoloy® Products23 Acheson DriveNiagara Falls, New York 14303Telephone: 716-278-6233Fax: 716-278-2373E-mail: scd.sales@saint-gobain.comwww.hexoloy.comEuropeSaint-Gobain Ceramics GmbHPostfach 401254 • Nobelstrasse 641189 Monchengladbach, GermanyPhone: 49-21665-509-0Fax: 49-21665-509-10Hexoloy Hexoloy Enhanced Noralide®Property Units SA SiC SP SiC Hexoloy®SA NBD-200 Si3N4Composition* – SiC SiC SSiC Si•NGrain Size µm 4-10 4-10 4-10 10 12@ 1000˚C ohm-cm 0.01-0.2 N/A 0.01-0.2Emissivity 0.9 0.9 0.9 N/APore Volume Fraction % N/A 4.0-6.0 N/A N/APore Size µm N/A 50 N/A N/A*Composition code: Si = free silicon metal;C = free graphite; SiC = silicon carbide;N = nitrogen; Si 3N 4= silicon nitride**Test Bar Size: 3 x 4 x 45 mm(0.118” x 0.157” x 1.772”)***RT to 1000°C****Dependent upon dopants in Hexoloy® SASiC which will decrease electrical resistivityYour Source for Hexoloy® SiC Seal Faces...Worldwide.Saint-Gobain Ceramics offers vast resources to meet your needs for silicon carbideproducts. With representation in Asia by Norton KK (a Saint-Gobain company)and locations in Europe, Australia and South America, we can deliver your solutionwhen you need it, where need you need it, in virtually every corner of the world.Contact Saint-Gobain Ceramics for more information©2003 Saint-Gobain CeramicsAll Rights ReservedForm No. B-104110/03The information, recommendations and opinions set forth herein are offered solely for your consideration,inquiry, and verification and are not, in part or total, to be construed as constituting a warranty or representationfor which we assume legal responsibility. Nothing contained herein is to be interpreted as authorizationto practice a patented invention without a license.Hexoloy® is a registered trademark of Saint-Gobain Ceramics.