There's at least one known case where someone attempted to grind a
beryllium mirror substrate using conventional methods without proper
control of dust resulting in his death.
Bruce
Neville Michie wrote:
Just in case anyone finds a beryllium brick somewhere and tries to use
it:
Beryllium is very very poisonous.
cheers,
Neville Michie
On 11/03/2010, at 10:08 AM, Bruce Griffiths wrote:
p...@pseng.org.uk wrote:
Looking at the specific heat of metals:
http://www.engineeringtoolbox.com/specific-heat-metals-d_152.html
Wouldn't Beryllium be better instead of aluminium?
I could foresee a few problems though eg machining holes at home,
never mind where to get a block from.
Phil
Actually in this application minimising the volume of the metal block
rather than its weight is probably better so one should use specific
heat*density as a figure of merit.
METAL Specific heat*density (W/J/cubic cm)
Aluminium 2.46
Beryllium 3.29
Copper 3.49
Silver 2.41
Iron 3.87
Thus copper and iron are better choices than Beryllium they also
poses fewer machining diffculties
Bruce
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
_______________________________________________
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
