h a l f b a k e r yNaturally, seismology provides the answer.
add, search, annotate, link, view, overview, recent, by name, random
news, help, about, links, report a problem
browse anonymously,
or get an account
and write.
register,
|
|
|
Please log in.
Before you can vote, you need to register.
Please log in or create an account.
|
A pure graphite pencil which has a diamond blade at the other end.
This is made by taking a hexagonal column of graphite and applying
extreme pressure and heat to half of it along a transverse axis,
squashing it and converting it to diamond. This enables one end to be
used as a very durable,
sharp blade and the other as a writing
implement. Alternatively, the blade can be used as a pen by drawing
blood and writing with it. It needs to be held with some kind of spongy
protective holder when written or drawn with.
I have a question. If the pressure in forming such a device is applied as
a gradient, are there intermediate graphite/carbon allotropes and if so,
what are they like?
Obviously you'd throw it away when you ran out of graphite.
https://www.newscie...s-hardest-material/
[hippo, Jan 09 2017]
[link]
|
| |
If you break it in half you can sharpen the pencil. |
|
| |
Hardness and durability are different things. |
|
| |
I don't think there is a smooth transition. The heat/pressure will make a fracture gap. |
|
| |
Maybe if the intervening Carbon continuum was all different C containing molecules, just like the Metamorphosis print, then you could get something that stuck to graphite and transition to something that stuck to/into diamond. All solidified with pressure and heat. |
|
| |
Also thanks I will look into the canadian programme Continuum. |
|
| |
Is there a reason why there can't be bits of graphite
embedded in diamond or vice versa? What happens with
black diamonds? |
|
| |
Diamond would make a fairly crappy knife blade. It's
way too brittle (as well as not being heat-resistant,
etc.) |
|
| |
Wurtzite boron nitride, of course (see link) |
|
| |