Refractory Open-Cell Foams:
Carbon, Ceramic, and Metal

Reticulated Vitreous Carbon Foam


With its patented fabrication process, Ultramet manufactures reticulated vitreous carbon (RVC) foam in a broad variety of shapes and pore sizes. RVC foam has 97% open porosity, low pressure drop, and a three-dimensional cellular structure.



  • Extremely lightweight
  • Thermally insulating
  • Electrically conductive
  • Easily machinable to near-net-shape
  • Stable at high temperatures
  • Resistant to thermal shock
  • Chemically inert


  • Molten metal filtration
  • Energy storage devices
  • Catalysis
  • Biomedical devices
  • Furnace fixturing and tooling
  • Electric contactors

Ultramet fabricates RVC foam in pore sizes of 10, 20, 30, 45, 65, 80, and 100 ppi. In addition, Ultramet manufactures compressed RVC foam, which provides anisotropic properties.


10 ppi
45 ppi
100 ppi

Three samples of RVC foam showing pore structure at different pore sizes (all ~10)