Saturday November 21, 2009 7:19 PM AEST

Transparent aluminium now a reality!

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Transparent aluminium now a reality!

And all it takes is a silly amount of electricity.

Transparent aluminium is a substance that all trek fans will instantly recognise; with the strength of a metal but the transparency of a pane of glass, it's the material used to keep tonnes of water at bay in Star Trek IV.

Scientists at the FLASH facility in Hamburg, Germany have managed to create their own version of this wonderful metal - but this is nowhere near as useful.

They took a sheet of aluminium foil and spread it out in front of an X-ray laser, bombarding it with such high intensity X-rays that it makes the average death ray look pleasantly warm.

Ten million gigawatts of power per square centimetre, where a gigawatt is equivalent to a billion watts, means that the foil was assaulted by a phenomenal ten million billion watts per square centimetre!

Wikipedia reckons the power output of the entire planet is roughly 15 trillion watts, the average nuclear power plant will make between 500 million to 1300 million watts, and a diesel locomotive could make up to 5 million watts - making this a silly amount of train engines applied to a teensy piece of aluminium foil!

The huge amount of energy blasting against the aluminium rips electrons out of each atom, doing it so quickly that they've got no chance to replace them in time and giving the piece of metal transparency - the scientists could peek through it to see what was on the other side.

As with anything using this much energy there are problems, and the power consumption notwithstanding the ions inside the aluminium just don't like being ripped apart so violently:

This state doesn't last long, though. Within fractions of a nanosecond, the energy pumped into the electrons is delivered to the ions, and the ions fly apart violently. "As soon as you make it, the stuff blows up," says Justin Wark of the University of Oxford.

Yeah, it explodes - kind of like making nitroglycerin inside a martini shaker while hopped up on speed.

So sure we can't make the aluminium actually stay transparent for very long, but it won't take long for the principles to be applied to other alloys and it's more than possible we can find one that will do this easily later on.

For now it tells us a lot about the materials inside the cores of planets, especially those huge gassy balls Jupiter and Saturn, so head over to New Scientist to take a peek at this overly excitable metal.

 

 
 
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12 Comments
Thoughts on this article? Add a comment below.
qwakqwak
Jul 28, 2009 2:02 PM
so you use as much electricity as north korea would probably use in a decade to make a tiny bit of tin foil transparent

...then it explodes

But on the plus side i'm sure that X-ray laser would make a great weapon of sorts
HokeyWhiteBoy
Jul 28, 2009 2:21 PM
The point is that it is real!

Obviously, in the future, we learn how to stabilise it. See... Star Trek IS REAL!
thesorehead
Jul 28, 2009 3:23 PM
Isn't this more a breakthrough for detection intstruments than anything else? I mean what I read into that was that they discovered that when you rip a hole in a piece of aluminium foil with a "Maser", it turns transparent for a nanosecond first.

^_^

still cool
thesorehead
Jul 28, 2009 3:23 PM
or "Xaser" or whatever. *shrug*
Bastard Child
Jul 28, 2009 5:13 PM
Aluminium oxynitride
From Wikipedia, the free encyclopedia

Aluminium oxynitride (AlON) is a transparent ceramic composed of aluminium, oxygen and nitrogen. It is marketed under the name ALON and described in U.S. Patent 4,520,116. The material remains solid up to 1,200 °C (2,190 °F), and is harder than glass. When formed and polished as a window, the material currently (2005) costs about US$10 to US$15 per square inch (~ US$20,000/m²).

It is currently the crucial outer layer of experimental transparent armor being considered by the US Air Force for the windows of armored vehicles. Other applications include semiconductors and retail fixtures.

Objects are usually formed from pressed, cast or molded powder. The formed objects are then densified by heating in an oven, and polished until transparent. The polishing substantially improves the armor's impact resistance.



Air Force testing new transparent armor
Posted 10/17/2005
http://www.af.mil/news/story.asp?id=123012131
TheFrunj
Jul 28, 2009 5:18 PM
Yeah, but this isn't a mix of other compounds - just pure aluminium :P

-JR
Cummings
Jul 28, 2009 6:46 PM
Keep in mind that the ten million gigawatts of power per square centimeter is confined to a time period of 50 millionths of a billionth of a second, hence the average load on the power grid is quite small over a period of a second.
Athiril
Jul 29, 2009 12:39 AM
What practical use could this possibly see?

Wouldn't a forcefield use much less energy and support a much greater load? Without blowing up? :P
thesorehead
Jul 29, 2009 9:06 AM
Like most technological advancement, the implications of this experiment are unlikely to have anything to do with the eventual creation of explosive/transparent aluminium.

Rather the principles involved will probably find a use in some tech that we've not imagined yet. Which is the way things normally go! ^_^
Jeruselem
Jul 29, 2009 12:03 PM
Cool!
SpaceCadet
Jul 29, 2009 5:35 PM
"Aluminium oxynitride" is probably a lot closer to what was mentioned in Star Trek IV.

The substance mentioned in the movie was actually a polymer of some sort - hence Scotty & Bones' offerering it to a Plastics company in return for some materials they needed to make the watertight hold area for the whales.

I like the fact that scientists and companies actually go out of their way to make SciFi Tech real. ie: A scientific device was actually developed that measures three different readings (Magnetism & 2 others I can't remember) - they even called it a "Tricorder" in honour of Star Trek
Mordecai
Jul 30, 2009 1:39 AM
"It is currently the crucial outer layer of experimental transparent armor being considered by the US Air Force for the windows of armored vehicles. Other applications include semiconductors and retail fixtures."

I wonder how good it would be for case modding?
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