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Actually, if we're talking about quantum materials ...
Superfluidity (ex: in liquid helium-4 near absolute zero)
"If a system is at such a low temperature that it is in the lowest energy state, it is no longer possible for it to reduce its energy, not even by friction. Without friction, the fluid will easily overcome gravity because of adhesion between the fluid and the container wall, and it will take up the most favorable position, all around the container."
Therma Hall Effect (thermal superconductivity)
The temperature of the thermally superconducting system increases instantaneously across the system, after a delay (which slows this effect to less than lightspeed)
We can imagine a sci-fi superconductor that could take kinetic force and distribute it across the entire kinetically superconducting system (after a delay) ... there was even a science fiction book about that, which I don't remember right now ...
Anyway, a kinetic superconductor sounds like an EXCELLENT armor, but remember it's brittle to the extent that if there's enough force even on just one point, then ALL of the armor fails or maybe you just lose superconductivity as the armor heats up from a simple RPG.
Diamond is visually so cool, but diamonds (like all crystals) are made up of regular patterns of atoms, so if you angle your strike just right (with reference to the material's cleavage), then you can hit at an angle where the crystal structure is weak, especially with diamond's cleavage:
"Toughness relates to the ability to resist breakage from falls or impacts: due to diamond's perfect and easy cleavage, it is vulnerable to breakage. A diamond will shatter if hit with an ordinary hammer."
http://en.wikipedia.org/wiki/Material_properties_of_diamond
Besides, if something is too brittle then it shatters rather than deforms. Ceramic armor for armies is tougher than steel, and it resists bullets better, but if you hit the ceramic with a sword it shatters and then your second strike can kill, whereas metal might just have deformed.
Impulse = Force/Time
Impulse is like stress on the object.
So if you increase the time the force acts (for example with deformation) that decreases the impulse, so deformation and metal is actually a good thing to decrease stress on the armor.
__________________ I shall be telling this with a sigh
Somewhere ages and ages hence:
two roads diverged in a wood, and I --
I took the one less traveled by,
And that has made all the difference.
- "The Road Not Taken" by Robert Frost
This post has been edited 2 time(s), it was last edited by Hari Seldon on 02-07-2007 at 14:35.
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02-07-2007 14:22 |
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| quote: | Originally posted by D4U2
| quote: | | Ceramic armor for armies is tougher than steel, and it resists bullets better, but if you hit the ceramic with a sword it shatters and then your second strike can kill, whereas metal might just have deformed. |
| how can a sword easily break it but a fast moving ,sometimes sharp, bullet would not break it. |
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A bullet, particularly armor-peircing, can punch a hole straight through a steel plate with ease. Against a ceramic armor, the ceramic will absorb the impact of the bullet, protecting the wearer. In most cases, the ceramic will still break, but it certainly is better than steel at protecting from bullets.
__________________ Inactive for 6 months, and still 5th by post count.




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02-15-2007 23:22 |
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