CMC SiC/SiC

Verifiedcomposite
· SiC/SiC CMC· Ceramic Matrix Composite

SiC/SiC ceramic matrix composite (CMC) reinforced with Hi-Nicalon S silicon carbide fibers in a dense SiC matrix, produced via chemical vapor infiltration (CVI) combined with polymer infiltration and pyrolysis (PIP). This cross-ply laminate architecture ([0/90]₂) delivers excellent damage tolerance and thermal stability compared to monolithic ceramics. Used in extreme-temperature structural applications where thermal shock resistance, light weight, and retention of strength at elevated temperatures are critical, particularly in aerospace propulsion (engine hot sections) and next-generation power generation systems; offers a significant advantage over superalloy alternatives by operating at higher temperatures while maintaining lower density.

Aircraft engine turbine blades and vanesHypersonic vehicle thermal protectionGas turbine combustor linersRocket nozzle insertsIndustrial heat exchangersBrake discs for high-speed applications

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65
Units:
siimperial
Composite Layup4 plies · 0.80 mm total

Fiber Direction

+0°
+90°
Drag to rotate · Scroll to zoom · → = 0° reference
FiberHi-Nicalon S SiC Fiber
MatrixSiC (CVI + PIP)
ProcessChemical vapor infiltration (CVI)
Cure1000°C CVI + polymer infiltration & pyrolysis
Vf35%

Ply Schedule

+0°SiC Fiber/SiC Matrix0.2 mm
+90°SiC Fiber/SiC Matrix0.2 mm
+0°SiC Fiber/SiC Matrix0.2 mm
+90°SiC Fiber/SiC Matrix0.2 mm

Laminate Code

[0/90/0/90]T

Fiber angles relative to the 0° reference direction (red arrow in 3D view). 0° = longitudinal, 90° = transverse, ±45° = shear paths.

Property OverviewNormalized to typical max values
PropertyValueUnitConditionsSource
Ultimate Tensile Strength(σUTS)
50.76
ksi—
Young's Modulus(E)
33,358.7
ksi—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Maximum Service Temperature(Tmax)
2,371.5
°F—
Thermal Conductivity(k)
6.933
BTU/(hr·ft·°F)—
Coefficient of Thermal Expansion(α (CTE))
2.500
µin/in·°F—
Verified Unverified Low confidence (<80%) Link to source
PropertyValueUnitConditionsSource
Density(ρ)
0.09032
lb/in³—
Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.
CMC SiC/SiC — Properties & Data | MatWorld