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Hard as Diamond?

 
Anonymous Coward
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02/19/2009 07:18 AM
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Hard as Diamond?
From our own news ticker to the left.

Diamond is no longer nature’s hardest material

India News

2009-02-18

London: Diamond will always be a woman’s best friend but the gemstone is no longer the world’s hardest material, according to scientists.



Instead, a rare natural substance, called lonsdaleite, which is made from carbon atoms just like diamond, has emerged as 58 per cent harder than the gemstone, according to a report in the New Scientist.



An international team, led by Zicheng Pan at Shanghai Jiao Tong University, simulated how atoms in two substances believed to have promise as very hard materials would respond to the stress of a finely tipped probe pushing down on them.



The simulation revealed that the first one, wurtzite boron nitride, withstood 18 per cent more stress than diamond, while the second, the mineral lonsdaleite, 58 per cent more.



Rare mineral lonsdaleite is sometimes formed when meteorites containing graphite hit Earth, while wurtzite boron nitride is formed during volcanic eruptions that produce very high temperatures and pressures.



If confirmed, however, wurtzite boron nitride may turn out most useful of the two, because it is stable in oxygen at higher temperatures than diamond.



And, according to the scientists, this makes it ideal to place on the tips of cutting and drilling tools operating at high temperatures, or as corrosion resistant films on the surface of a space vehicle, for example. Paradoxically, wurtzite boron nitrides hardness appears to come from the flexibility of the bonds between the atoms that make it up.



When its stressed some bonds tend to re-orientate themselves by about 90 to relieve the tension.



Although diamond undergoes a similar process, something about the structure of wurtzite boron nitride makes it nearly 80 per cent stronger after the process takes place, the studys co-author Changfeng Chen of University of Nevada wrote in the Physical Review Letters journal.
Anonymous Coward (OP)
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02/19/2009 07:19 AM
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Re: Hard as Diamond?
Dont tell the ladies chuckle
SubarcticBeef

User ID: 560939
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02/19/2009 07:26 AM
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Re: Hard as Diamond?
I've been told my skull was the hardest material known to science. I welcome all challengers, however.
Large and Powerful
[link to i154.photobucket.com]
Anonymous Coward (OP)
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02/19/2009 07:34 AM
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Re: Hard as Diamond?
I've been told my skull was the hardest material known to science. I welcome all challengers, however.
 Quoting: SubarcticBeef

Dont let them turn you into a drill bit! tomato
SubarcticBeef

User ID: 560939
United States
02/19/2009 07:37 AM
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Re: Hard as Diamond?
I've been told my skull was the hardest material known to science. I welcome all challengers, however.

Dont let them turn you into a drill bit! tomato
 Quoting: RememberThis

A battering ram, maybe. But my head isn't pointed.(I hope)
Large and Powerful
[link to i154.photobucket.com]
Winningjob

User ID: 385114
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02/19/2009 07:40 AM
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Re: Hard as Diamond?
Kiss Black Diamond 1975 Midnight Special


[link to www.youtube.com]
Anonymous Coward (OP)
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02/19/2009 07:40 AM
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Re: Hard as Diamond?
Kiss Black Diamond 1975 Midnight Special


[link to www.youtube.com]
 Quoting: Winningjob

LOL
Anonymous Coward (OP)
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02/19/2009 07:40 AM
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Re: Hard as Diamond?
Geraldine!
Anonymous Coward (OP)
User ID: 615909
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02/19/2009 07:47 AM
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Re: Hard as Diamond?
Kiss Black Diamond 1975 Midnight Special


[link to www.youtube.com]

LOL
 Quoting: RememberThis

<<Closet Kiss fan Awesome applause2
Winningjob

User ID: 385114
United States
02/19/2009 07:48 AM
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Re: Hard as Diamond?
hf
Anonymous Coward
User ID: 616732
United Kingdom
02/19/2009 07:49 AM
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Re: Hard as Diamond?
wow. so where does this ionsdaleite and wurzle gumage boron nitride, stand with ultra hard fulerite and aggregate carbon nanorods???...
Anonymous Coward (OP)
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02/19/2009 07:49 AM
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Re: Hard as Diamond?
OldFav
Anonymous Coward (OP)
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02/19/2009 07:52 AM
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Re: Hard as Diamond?
Old Fav..this may post twice...gremlins'

Anonymous Coward (OP)
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02/19/2009 07:52 AM
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Re: Hard as Diamond?
It did LOL....fuk it laugh
Anonymous Coward (OP)
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02/19/2009 07:55 AM
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Re: Hard as Diamond?
wow. so where does this ionsdaleite and wurzle gumage boron nitride, stand with ultra hard fulerite and aggregate carbon nanorods???...
 Quoting: Anonymous Coward 616732

beats the hell outta me
Winningjob

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02/19/2009 07:57 AM
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Re: Hard as Diamond?
Old Fav..this may post twice...gremlins'


 Quoting: RememberThis

NICE! I love when they all sing the chorus!
Anonymous Coward (OP)
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02/19/2009 07:57 AM
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Re: Hard as Diamond?
I still think the memory metal the found at Roswell is the shit LOL...Too bad they didnt make the ship out of it chuckle
Anonymous Coward (OP)
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02/19/2009 07:58 AM
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Re: Hard as Diamond?
Old Fav..this may post twice...gremlins'



NICE! I love when they all sing the chorus!
 Quoting: Winningjob

Looks like Im going to have to fire up Rhapsody and wake up the neighbors
Anonymous Coward (OP)
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02/19/2009 07:58 AM
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Re: Hard as Diamond?
With my headphones even wahahahaha
Anonymous Coward (OP)
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02/19/2009 08:02 AM
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Re: Hard as Diamond?
Youtube has the video down...the audio is .....lacking LOL
Anonymous Coward (OP)
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02/19/2009 08:19 AM
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Re: Hard as Diamond?
KOTD
Anonymous Coward
User ID: 416242
Slovakia
02/19/2009 05:50 PM
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Re: Hard as Diamond?
They forgot to tell us what material did they use to produce the drill that drilled into the most hard stuff at all... wtf
Anonymous Coward
User ID: 618387
United States
02/19/2009 06:30 PM
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Re: Hard as Diamond?
They forgot to tell us what material did they use to produce the drill that drilled into the most hard stuff at all... wtf
 Quoting: Anonymous Coward 416242

You know how they do it ...they just cram it in till it breaks and then look at what they have LOL





GLP