A hot gas valve disc for a divert and attitude control disc switching element used in a propelled craft. The hot gas valve disc comprises a first layer comprising a first metal material having a first grain size and a first grain orientation, and at least one additional layer comprising a second metal...http://www.google.es/patents/US7509738?utm_source=gb-gplus-sharePatente US7509738 - Solid-free-form fabrication of hot gas valve discs
Solid-free-form fabrication of hot gas valve discs
