These were discovered by a scientist at the place where I work, Oak Ridge
National Lab. You can go to www.ornl.gov and search for "graphite foam" for
more information.
The following is a ~5 MB Acrobat file with lots of technical details and
pictures:
http://www.ms.ornl.gov/sections/mpst/Cimtech/foam/Graphite_Foams.pdf
-Dave
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