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COI Ceramics Sylramic™ Crystalline Silicon Carbide (SiC) Fiber
Categories: Ceramic; Carbide

Material Notes: Description: Sylramic™ SiC fiber is a textile grade continuous tow (yarn) made up of 800 filaments with a denier of 1600. Each filament is 10µm in diameter and is coated with a polyvinyl alcohol (PVA) sizing for improved handleability.

Product Form:
Sylramic™ SiC Fiber Tow: Continuous tow is supplied on 3 inch diameter cardboard spools. Lengths up to 800m (145g weight) are available. Tow length may vary depending upon availability and customer requirements.
Sylramic™ SiC Fiber, Woven: Cloth is available in standard weaves such as plain (PW), 5 harness satin (5HS) and 8 harness satin (8HS). As a textile grade yarn, Sylramic™ SiC Fiber can be readily incorporated into a variety of weaves, woven tapes, braids, etc.

Special Properties: Sylramic™ SiC Fiber has excellent room temperature strength and stiffness. The fiber has excellent creep resistance, maintaining strength and stiffness for extended times at extremely high temperatures (1400C [2252F]). These fiber properties are due to its chemical composition, crystalline structure, small crystal size, and very low oxygen content. This also allows it to have excellent wear and corrosion resistance capability.

Uses: Sylramic™ SiC Fiber is used as reinforcement in structures such as ceramic, plastic, and metal matrix composites. These products are used in severe environments such as aircraft and land-based turbine engines, hypersonics, thermal protection systems and chemical manufacturing. Sylramic™ SiC Fiber is used as a composite reinforcement to increase the part strength, toughness, and high temperature creep resistance.

Information from COI Ceramics, Inc.

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Physical PropertiesMetricEnglishComments
Density >= 2.95 g/cc>= 0.107 lb/in³
 3.10 g/cc0.112 lb/in³
Particle Size 0.10 µm0.10 µmB4C Crystal Size
 0.10 - 0.50 µm0.10 - 0.50 µmSiC Crystal Size
 0.50 µm0.50 µmTiB2 Crystal Size
Filament Diameter 10 µm10 µm
Fiber Count 1780 dtex1600 denier
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength 2600 MPa377000 psi
 >= 2760 MPa>= 400000 psi
Tensile Modulus >= 310.23 GPa>= 44996 ksi
 420 GPa60900 ksi
 
Thermal PropertiesMetricEnglishComments
CTE, linear 5.40 µm/m-°C
@Temperature 20.0 - 1320 °C
3.00 µin/in-°F
@Temperature 68.0 - 2410 °F
Specific Heat Capacity 0.750 J/g-°C
@Temperature 50.0 °C
0.179 BTU/lb-°F
@Temperature 122 °F
Thermal Conductivity  40.0 W/m-K
@Temperature 500 °C
278 BTU-in/hr-ft²-°F
@Temperature 932 °F
 45.0 W/m-K
@Temperature 25.0 °C
312 BTU-in/hr-ft²-°F
@Temperature 77.0 °F
Maximum Service Temperature, Air 1400 °C2550 °F
 
Component Elements PropertiesMetricEnglishComments
Oxygen, O <= 0.050 %<= 0.050 %
 0.30 %0.30 %
SiC 96 %96 %
 
Descriptive Properties
B4C(%)1
Filaments per tow800
TiB2(%)3

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CCOIC016 / 122056

Specialty Compounds RTP Company

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