[MHml] Dont carbon beams get hot

[Martin Schöön]

2009/10/14 Lance Gascoigne <lancegas at yahoo.com>:
> According to this research paper carbon is very thermally conductive - so as
> long as there is a good place to dump the heat (metal connector/mounting,
> proximity to cold water, etc) it should never get hot or deform.
>
> "Carbon fibers have a variety of thermal advantages for many
> high-temperature uses in military and civilian applications:
> for instance, thermal stability, high thermal conductivity, low
> thermal expansion, thermal shock resistance, and ablation
> resistance [1-3]."  http://pdf.ricta.or.kr/fap/05010031.pdf
>
I see no data better than 10 W/m/K which in my book is pretty poor
heat conduction. This, of course, depends on your point of reference.
If I compare it to the glass-epoxy laminates used in printed circuit
boards it is pretty good as 0.3 W/m/K is the reference. If I, on the
other hand, compare with metals...:
Cu: 380 W/m/K
Al:  200 W/m/K (extruded) or 120 W/m/K (high pressure injection molded)

The champion is diamond, it can reach 2300 W/m/K.

-- 
Martin Schöön

"Problems worthy of attack
prove their worth by hitting back"
                                         Piet Hein