This seems unlikley.  There is probably a technical error as translated by 
New Scientist.  Heating in oxygen will cause graphite to burn.  This probably 
was an  environment with no oxygen, like under a forming gas [N2/H2 mixture]. 
 Though they did not state the temperature, could be very low, but then this 
not seem probable to transform the foamed structure to graphite.   
Perhaps I can track down the original source.
Thats the problem with all us carbon units, we are unstable with respect to 
oxygen [oxidation].  So for space it has to be coated to protect it in low  
to medium earth orbit, to protect it from ionic bombardment from atmosphere 
and solar particles.
-Jay
This archive was generated by hypermail 2b30 : Mon May 28 2001 - 09:50:15 MDT