The potting material becomes very hard.

It contains many isolated pores – ideal tiny pressure vessels for the retention of fission gases. The diameter of the pores is up to 3 mm.

Because of the pores, the density is quite low (about 1.2 grams per cubic centimetre, resp. 37 % of dense silicon carbide).

Potting improves important safety features to a great extent. Positive effects are highlighted by improved:

  • retention capability
  • protection of SSiC (corrosion stability)
  • heat conductivity
  • seam tightness between segments
  • sub-criticality
  • overall mechanical stability