No offense, Bladestrike, but it could be the username set him back a bit.....
;-)
Seriously, cooling technologies are where its at these days. The idea is that air is pumped up through the blade's interior, cooling the metal from within, then passes to the surface in slots that allow it to produce a film of air to protect and cool the surface. That way the temperature of the hot gas can be many degrees higher than the temperature of the metal itself.