Properties of Foam Materials

Properties of Foam Materials

Abundant data on various foam materials offered by Ultramet are available on request. Selected information follows.

Reticulated Vitreous Carbon Foam

Typical Physical Properties of Open-Cell Reticulated Vitreous Carbon

Silicon Carbide Foam

Typical Physical Propertiesof Open-Cell Silicon Carbide

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Pore sizes available
Ash content
Bulk density
Ligament density
Resistivity
Specific heat
Maximum use temperature

Thermal expansion, ppm/°C
0–200°C
0–500°C
0–1000°C
Thermal conductivity, W/m · K
at 200°C
at 300°C
at 400°C
at 500°C
at 650°C
at 800°C
at 950°C
Compressive strength, kPa
at 20°C

at 1000°C in argon

Shear strength at 20°C
Tensile strength at 20°C
Flexural strength at 20°C
Flexural modulus

10, 20, 30, 45, 65, 80, and 100 ppi
0.39 wt% at 1000°C
0.045 g/cm3
1.538 g/cm3
0.75 Ω · cm
0.30 cal/g/°C
350°C in air
3500°C inert

1.15
1.65
1.65

0.085
0.125
0.180
0.252
0.407
0.625
0.882

625 (10% deflection)
763 (ultimate)
391 (10% deflection)
628 (ultimate)
290 kPa
690 kPa
690 kPa
58.6 MPa

Pore sizes available
Bulk density
Relative density
Theoretical ligament density
Specific heat (10% SiC)
Maximum use temperature

Thermal expansion
Thermal conductivity
Strength
Young’s modulus
Strain to failure

10, 20, 30, 45, 65, 80, and 100 ppi
0.16–1.28 g/cm3
5–40%
3.2 g/cm3
0.34 cal/g/°C
1650°C in air
2500°C inert
see below
see below
see below
see below
0.07% at 20°C

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Thermal properties of silicon carbide foam produced to 10 vol% dense (0.32 g/cm3). Thermal expansion is independent of vol% density and matches that of solid silicon carbide.

Strength and Young’s modulus as a function of bulk density for open-cell silicon carbide foam

Pressure drop data for water flow through 2 × 3 × ½” slabs of silicon carbide foam with water flowing parallel to the long axis of the sample; 80- and 100-ppi foams with relative densities of 20 and 30% were tested.

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