4D images show spacecraft heat shield damage goes below the surface Jul 29, 2025 2:15 pm by Debra Levey LarsonResearch Share on Facebook Tweet Email Images Carbon fiber heat shields decompose to dissipate heat during re-entry. It was assumed this only happens on the surface, but new U. of I. research show degradation beneath the surface as well, possibly threatening the life of the vehicle. Share on Facebook Tweet Email