h a l f b a k e r yRenovating the wheel
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I propose constructing a Tokamak to magnetically
levitate/contain a six-foot diameter tungsten carbide trough.
The trough would be filled with pure carbon, spun up to
500RPM (about Mach 9), and heated. Silica and iron would be
added to the trough as well. The weight of the silica would
compress
the carbon between it and the iron, making
diamond. The result would be hoops of pure diamond, useful
for construction.
http://xkcd.com/123/
[hippo, Feb 07 2013]
Centripugal Force
attribution goes to [Basepair] [lurch, Feb 08 2013]
Takhomasak
http://www.yelp.com...asak-cape-girardeau
[RayfordSteele, Feb 12 2013]
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Annotation:
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Construction of what, exactly? |
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Diamond is pretty brittle. |
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^Bracelets for Queen Kong? |
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While you're at it, can you please explain how you're going
to achieve the 50,000-70,000 atmospheres of pressure
needed to create diamonds with this magical device? |
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I believe the compression arises from the
centripugal force. Quite how the trough is going to
sustain that force is not made clear. |
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Tungsten carbide melting point, 2870 C, diamond melting point 3550 C. |
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[marked-for-deletion] bad science. |
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But "Ferromagnetic behaviour has so far been observed in pressure and light polymerised fullerenes and irradiated graphite", so it might be possible just with the magnetic field of the tokomak and then you can dispense with the trough. |
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Do not ask me what will happen to the incredibly hot and rapidly spinning carbon circle if, due to a state change, it suddenly becomes non-magnetic. |
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[unmarked-for-deletion] as wonderful to watch, from a considerable distance. |
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It would be wonderful to watch. I think a few tons of
tungsten carbide fragments, re-entering the atmosphere,
would make a lovely meteor shower. |
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Nice link, [hippo]. I also like the way [Max] created the
neologism "centripugal", for the occasion. |
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Very tempted to allow [Max] to take the blame for one further bit of vandalism of the Queen's English, as it is a thing he is wont to do; but this particular vocabularic anomaly is rightfully blamed on another - see link. |
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how would it be cheaper/better than chemical vapor deposition? |
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In accordance with tradition, I shall endeavor to
clear/muddy the waters of scientific truth as it
relates to this idea. |
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The brittleness problem could be avoided by
laminating multiple diamond hoops with a polymer,
as in carbon fiber. Other more speculative
methods might work as well (rapid cooling of very
pure carbon to get amorphous diamond). |
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There would need to be a layer of Tantalum
Carbide (melting point >4000C) between the
tungsten carbide and the carbon/diamond. |
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You know what? This is a terrible idea. Here's a
better one: take a big lump of pure carbon, put
some silica rocks around it, put the block in the
exact center of some fusion bomb(s), put it
underwater (for rapid cooling), and detonate it. |
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Yep. I'm pretty sure the people who live nearest to the
cooling pond would welcome your idea with open arms. |
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All seven of them,due to the radiation. |
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Incidentally, howcome Spiderman doesn't have eight limbs? |
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