Re: FW: [ATM] re Aluminium casting

[Charles Mitchard <charlesmitchard@iinet.net.au>]

Yes, you can check here http://home.c2i.net/metaphor/mvpage.html
Use a silicon-carbide crucible to adsorb the microwaves, this heats up and 
melts the metal.
Cant find anything about aluminium but dont see why not.

>   Could it be done by microwave?  I would
>like nothing better than to "cast" various parts (focusers, mirror
>mounts, whatever) from powdered metal, if the heating part is
>uncritical.  Surely it doesn't need a long soaking heat for small
>(1", say) cross-sections?  Clearly the heat is below the m.p. of the
>metal in question.
>
>Frankly, I'm scared of making a big cupola furnace and of handling
>fifty pounds of molten metal at once.

Why 50lbs?
Thats a lot of metal for telescope making.


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