Methods and apparatus are provided for forming a diffusion bonded composite structure. The composite structure includes at least one internal void or feature. Surfaces to be bonded are cleaned and prepared for bonding. The exposed joints of the composite structure where the surfaces interface are sealed....http://www.google.com.au/patents/US8225481?utm_source=gb-gplus-sharePatent US8225481 - Diffusion bonded composite material and method therefor
