Pure SiCTM CVD Silicon Carbide CoorsTek manufactures bulk SiC using a high temperature Chemical Vapor Deposition (CVD) process. Ultra-pure raw materials and carefully controlled processing conditions create exceptionally clean, dense, and corrosion resistant SiC. Pure SiC can be manufactured to meet both high and low resistivity requirements. • Purity greater than 99.9995% • Excellent mechanical properties • High thermal conductivity • Superior corrosion resistance • Near-net shape deposition • Sizes up to 20" Reaction Bonded Silicon Carbide CoorsTek employs a reaction-bonding process to manufacture SiC that retains approximately 10% free silicon. Our bonded SiC can be formed by casting, dry pressing, or isostatic pressing. • Excellent wear properties • Thermal shock resistance • Sizes up to 20" Direct Sintered Silicon Carbide CoorsTek produces high-purity SiC using a direct sintering process. This process allows for low-cost forming methods such as casting, dry pressing, and isostatic pressing, while retaining high-purity levels. • Purity greater than 99% • Thermal shock resistance • Near-net shape forming • Excellent mechanical properties • Sizes up to 36" x 75" Graphite Loaded Direct Sintered Silicon Carbide CoorsTek has combined the lubricating properties of graphite into their already established high-purity sintered silicon carbide to create the next generation in friction and wear materials. This engineered material designated as SC-DSG offers the stability of sintered silicon carbide and the low frictional characteristics of graphite. This chemically inert combination can be formed utilizing the latest technologies of dry pressing, casting, and isostatic pressing. • Excellent Thermal Shock Properties • Excellent Chemical Resistance • Near Net Shape Forming • "Built-in" lubrication • Sizes up to 20" CoorsTek Silicon Carbide Materials and Their Properties | | | Density | gm/cc | ASTM-C 20 | 3.10 | 3.15 | 2.80 | 3.18 | 3.21 | 3.21 | | Crystal Size, Average | MICRONS | THIN-SECTION | 12 | 5 | 5 | 8 | 3 – 10 | 3 - 10 | | Color | * | * | Black | Black | Black | Black | Black | Black | | Flexural Strength (MOR), 20° C | MPa (psi X 103) | ASTM-F417 | 462 (67) | 480 (70) | 220 (21) | 540 (78) | 468 (68) | 517 (75) | | Elastic Modulus, 20° C | GPa (psi X 106) | ASTM-C848 | 393 (57) | 410 (59) | 310 (32) | 375 | 462 (67) | 434 (63) | | Poisson's Ratio, 20° C | * | ASTM-C848 | 0.20 | 0.21 | 0.18 | 0.38 | 0.21 | 0.21 | | Compressive Strength, 20° C | MPa (psi X 103) | ASTM-C773 | 2700 (363) | 3500 (507) | 675 (91) | * | * | * | | Hardness | GPa (kg/mm2) | KNOOP 1000 gm | 26 (2500) | 26 (2500) | 26 (2500) | 24 | 27 (2750) | 27 (2750) | | Tensile Strength, 25° C | MPa (psi X 103) | ACMA TEST #4 | 307 (44.5) | * | * | * | * | * | | Fracture Toughness, Klc | MPa.m½ | Notched Beam | 4 | 4 | 3.2 | 6.9 | 3.5 | 3.5 | | Thermal Conductivity, 20° C | W/m.K | ASTM-C408 | 125 | 150 | 125 | 80 | 115 | 115 | | CTE, 25-1000° C | 1X 10-6/ °C | ASTM-C372 | 4.3 | 4.4 | 4.4 | 3.3 | 4.6 | 4.6 | | Specific Heat, 100° C | J/kg*K | ASTM-E1269 | 820 | 800 | 820 | 820 | 665 | 665 | | Thermal Shock Resistance, ΔTc | °C | NOTE 3 | 400 | 300 | 600 | 300 | * | * | | Maximum Use Temperature | °C | NO-LOAD COND. | 1000 | 1600 | 1600 | 1000 | 1600 | 1600 | | Volume Resistivity, 25° C | log (ohm-cm) | ASTM-D1829 | < 103 | < 105 | < 105 | * | > 106 | < 0.1 | | Volume Resistivity, 500° C | log (ohm-cm) | ASTM-D1829 | < 103 | < 103 | < 103 | * | * | * | | Volume Resistivity, 1000° C | log (ohm-cm) | ASTM-D1829 | < 103 | < 103 | < 103 | * | * | * | * Not available Note: The chart is intended to illustrate typical properties. Engineering data is representative. Property values vary somewhat with method of manufacture, size, and shape of part. This data is not to be construed as absolute and does not construe a warranty for which we assume legal responsibility. Materials and Manufacturing Experts CoorsTek is uniquely capable of providing advanced materials and manufacturing technologies. Let the CoorsTek team help you select the best materials and design for manufacturability. |