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(Phys Org2)   It's not transparent aluminum, but it's close   ( phys.org) divider line
    More: Interesting, silicon nitride, Boron nitride, Diamond, cubic silicon nitride, Materials science, Boron, Crystallography, Crystal system  
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4494 clicks; posted to Geek » on 17 Mar 2017 at 4:50 PM (30 weeks ago)   |   Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



41 Comments     (+0 »)
 
View Voting Results: Smartest and Funniest
 
2017-03-17 01:25:10 PM  
Sapphire IS transparent aluminum, subby.
 
2017-03-17 04:39:54 PM  
How quaint.
 
2017-03-17 04:54:56 PM  
Perfect for my 1-5mm window needs
 
2017-03-17 05:03:19 PM  
philipedwards.files.wordpress.com
 
2017-03-17 05:05:25 PM  
Transparent aluminum:

www.tssbulletproof.com

It's been around for decades, discovered by a plastics manufacturer in the late 1980s.
 
2017-03-17 05:05:33 PM  

SumFrequency: Sapphire IS transparent aluminum, subby.


It's transparent corundum, isn't it?
 
2017-03-17 05:09:30 PM  
It's not transparent aluminum, but it's close

img.fark.net
Is it a lot?
 
2017-03-17 05:14:27 PM  

This text is now purple: SumFrequency: Sapphire IS transparent aluminum, subby.

It's transparent corundum, isn't it?


Both. The name sapphire is applicable to corundum of any coloration other than red / orange.
 
2017-03-17 05:27:13 PM  
FTFA: However, because of the large pressure needed to synthesise transparent cubic silicon nitride, the possible window size is limited for practical reasons. "The raw material is cheap, but to produce macroscopic transparent samples we need approximately twice the pressure as for artificial diamonds," says Nishiyama. "It is relatively easy to make windows with diameters of one to five millimetres. But it will be hard to reach anything over one centimetre."

Well, this seems like an easy problem to solve. Just make millimeters bigger. They're metric, right?
 
2017-03-17 05:30:20 PM  

chromeburn: Perfect for my 1-5mm window needs


Look, don't use it if you don't want, but don't come crying to me when it's 800°C and your diamond windows have conked out. I'll just stare at you through my tiny little windows.
 
2017-03-17 05:32:59 PM  
That scene always annoyed the hell out of me. First, they didn't need the damn stuff to be transparent. A steel plate would have worked fine. Second, even if they did need it to be transparent, they could have used the same stuff that was used in the aquarium. There was no need to invent something that already existed.
 
2017-03-17 05:34:03 PM  
At pressures above 130 thousand times the atmospheric pressure, silicon nitride transforms into a crystal structure with cubic symmetry that experts call spinel-type in reference to the structure of a popular gemstone.

This is spinel-type
img.fark.net
 
2017-03-17 05:40:05 PM  
Why did it have to be transparent? It wasn't an aquarium. And how did Scotty know how to type?
 
2017-03-17 05:49:33 PM  

RoomFullOfMonkeys: That scene always annoyed the hell out of me. First, they didn't need the damn stuff to be transparent. A steel plate would have worked fine. Second, even if they did need it to be transparent, they could have used the same stuff that was used in the aquarium. There was no need to invent something that already existed.


They used plexiglass that they paid with the transparent aluminium formula.
 
2017-03-17 05:53:29 PM  

jake_lex: [philipedwards.files.wordpress.com image 500x214]


came for this, leaving to find the nuclear wessel.
 
2017-03-17 05:54:53 PM  

RoomFullOfMonkeys: That scene always annoyed the hell out of me. First, they didn't need the damn stuff to be transparent. A steel plate would have worked fine. Second, even if they did need it to be transparent, they could have used the same stuff that was used in the aquarium. There was no need to invent something that already existed.


But they did end up using the same stuff that was in the aquarium.  They just paid for it by giving the plexiglass corporate bigshot the formula -- which would take him years to figure out.   The "transparent aluminum" would have only needed to be 1 inch thick, but what they used was several inches thick.    Go watch it again -- They didn't even try to make the transparent aluminum... just gave him off-the-shelf stock panels to spec.  Of course, you're right that they could have used steel, but again... they had no money to purchase it.  In exchange for the formula, they got pre-cut sheets of the modern-era equivalent that they could fly in with a helicopter to slide into place.   That saved them a lot of time.

Steel would have weighed a lot more (not good for the helicopter!)  which combined with the weight of the whales and water would have added to their mass calculations...    and Spock was having enough trouble guessing for his calculations as it was.

Do you want to get lost in time?   b/c messin' w/ Spock's time warp calculations in accounting for the additional mass is how you end up lost in time ;-)
 
2017-03-17 07:00:28 PM  

Xuss: This text is now purple: SumFrequency: Sapphire IS transparent aluminum, subby.

It's transparent corundum, isn't it?

Both. The name sapphire is applicable to corundum of any coloration other than red / orange.


To clarify, corundum is the name for a crystalline type of aluminum oxide (also called alumina).  Sapphires and rubies are both corundum.
 
2017-03-17 07:31:11 PM  

Lochsteppe: FTFA: However, because of the large pressure needed to synthesise transparent cubic silicon nitride, the possible window size is limited for practical reasons. "The raw material is cheap, but to produce macroscopic transparent samples we need approximately twice the pressure as for artificial diamonds," says Nishiyama. "It is relatively easy to make windows with diameters of one to five millimetres. But it will be hard to reach anything over one centimetre."

Well, this seems like an easy problem to solve. Just make millimeters bigger. They're metric, right?


I suppose they could also just sinter in a 1300km deep hole full of water. Probably wouldn't even need a heater at that depth.
 
2017-03-17 07:45:10 PM  

talkertopc: They used plexiglass that they paid with the transparent aluminium formula.


Not according to the novel I read when I was ten. The ship wasn't big enough to hold two whales anyway.
 
2017-03-17 07:59:53 PM  

semiotix: chromeburn: Perfect for my 1-5mm window needs

Look, don't use it if you don't want, but don't come crying to me when it's 800°C and your diamond windows have conked out. I'll just stare at you through my tiny little windows.


Give it time.  We're not even two months into the Trump administration.
 
2017-03-17 08:02:15 PM  

Mugato: talkertopc: They used plexiglass that they paid with the transparent aluminium formula.

Not according to the novel I read when I was ten. The ship wasn't big enough to hold two whales anyway.


Since when do novels == movies?   Also, the ship was plenty big in the movie at least.  There's a lot more to the ship than just the bridge and the engine room.   The movie did a poor job of scaling as depending on the scene, the Bird of Prey looked anywhere from 50 meters to 330 meters wide, but the ST Canon says it was between 110 m and 230 meters in that era.   The size variation was dependent upon the prop or special effect used and whether there were humans physically interacting with the hull -- big props aren't cheap.

Whales only needed about 20 meters long, and less wide for their short-term purposes... well... really less if they only wanted to keep the whales wet and comfortable (about 15 meters).   2 of them could easily fit in the cargo area.    What space-faring, looting band of warrior pirates wouldn't have a 60' x 60' area to store their pillaged goods?!?

A thorough discussion on BoP sizes:
http://www.ex-astris-scientia.org/articles/bop-size.htm
 
2017-03-17 08:31:32 PM  

KingRamze: http://www.ex-astris-scientia.org/articles/bop-size.htm


I remember this article from like a millions years ago. The answer is "The size is whatever the hell we feel like now shut up and enjoy the spacefuture lazer pew pew show"
 
2017-03-17 08:57:53 PM  

KingRamze: Also, the ship was plenty big in the movie at least.


Would the Klingons build a warship that had oodles of space for cargo? It seems a bit at odds with the goals of a warship. I know, it's just a movie.
 
2017-03-17 09:55:57 PM  

Befuddled: KingRamze: Also, the ship was plenty big in the movie at least.

Would the Klingons build a warship that had oodles of space for cargo? It seems a bit at odds with the goals of a warship. I know, it's just a movie.


Wasn't it originally supposed to be a Romulan ship?
 
2017-03-17 10:09:51 PM  
upload.wikimedia.org
That is one hell of a dense structure.  No wonder it can only be made through extreme pressure techniques.
 
2017-03-17 10:54:31 PM  

Befuddled: KingRamze: Also, the ship was plenty big in the movie at least.

Would the Klingons build a warship that had oodles of space for cargo? It seems a bit at odds with the goals of a warship. I know, it's just a movie.


Use as a troop transport?
 
2017-03-17 11:43:34 PM  

phlegmmo: At pressures above 130 thousand times the atmospheric pressure, silicon nitride transforms into a crystal structure with cubic symmetry that experts call spinel-type in reference to the structure of a popular gemstone.

This is spinel-type
[img.fark.net image 240x180]


To get such high pressure, I imagine they must have turned their machine up to 11.
 
2017-03-17 11:48:19 PM  

StatelyGreekAutomaton: phlegmmo: At pressures above 130 thousand times the atmospheric pressure, silicon nitride transforms into a crystal structure with cubic symmetry that experts call spinel-type in reference to the structure of a popular gemstone.

This is spinel-type
[img.fark.net image 240x180]

To get such high pressure, I imagine they must have turned their machine up to 11.


*snert*
 
2017-03-18 12:33:28 AM  

SumFrequency: Sapphire IS transparent aluminum, subby.


This is a confusing question. It's quite a corundum.
 
2017-03-18 12:43:27 AM  
Well, double dumbass on you!
 
2017-03-18 01:39:07 AM  
nerds!.jpg

Carry on.
 
2017-03-18 01:48:52 AM  
Does anyone else feel that ST IV has aged horribly?    25 years ago it was easily the second best Trek after Khan but now I find it unwatchable, mostly because of that awful, can't act whale expert.
 
2017-03-18 01:50:19 AM  

This text is now purple: SumFrequency: Sapphire IS transparent aluminum, subby.

It's transparent corundum, isn't it?


And what is corrundum?
 
2017-03-18 01:50:46 AM  

Befuddled: KingRamze: Also, the ship was plenty big in the movie at least.

Would the Klingons build a warship that had oodles of space for cargo? It seems a bit at odds with the goals of a warship. I know, it's just a movie.


Stowage of plunder and booty, arrrgh!
 
2017-03-18 08:49:11 AM  

Befuddled: KingRamze: Also, the ship was plenty big in the movie at least.

Would the Klingons build a warship that had oodles of space for cargo? It seems a bit at odds with the goals of a warship. I know, it's just a movie.


If you want to shoot lots of torpedos, you need a place to put them.
 
2017-03-18 09:29:01 AM  
Formed at 130,000 bar!? Holy shiat. How hell did they do that?
 
2017-03-18 10:13:12 AM  

Mugato: Why did it have to be transparent? It wasn't an aquarium. And how did Scotty know how to type?


He minored in the history of technology. They kept a Selectric in the lab.
 
2017-03-18 03:20:17 PM  

Benjimin_Dover: Befuddled: KingRamze: Also, the ship was plenty big in the movie at least.

Would the Klingons build a warship that had oodles of space for cargo? It seems a bit at odds with the goals of a warship. I know, it's just a movie.

If you want to shoot lots of torpedos, you need a place to put them.


I'd integrate a replicator in the torpedo tube.
 
2017-03-18 05:51:26 PM  

skeevy420: I'd integrate a replicator in the torpedo tube.


You'd still have to store the matter the replicator uses. Maybe that's whats in all those cargo bays that are constantly being referenced in Trek shows. Lots of boxes labeled "MISCELLANEOUS ATOMS."
 
2017-03-18 08:09:53 PM  

Befuddled: KingRamze: Also, the ship was plenty big in the movie at least.

Would the Klingons build a warship that had oodles of space for cargo? It seems a bit at odds with the goals of a warship. I know, it's just a movie.


Half the ship is a torpedo tube. Probably warhead storage.
 
2017-03-18 10:37:31 PM  

skeevy420: Benjimin_Dover: Befuddled: KingRamze: Also, the ship was plenty big in the movie at least.

Would the Klingons build a warship that had oodles of space for cargo? It seems a bit at odds with the goals of a warship. I know, it's just a movie.

If you want to shoot lots of torpedos, you need a place to put them.

I'd integrate a replicator in the torpedo tube.


That's what she said.
 
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