Chainglass!
(props to Neal Asher)
As this is metal with some properties of glass, not glass with some properties of metal, I presume it is not transparent; so calling it 'metallic glass' is a bit misleading.
A new breakthrough in superspeed pulse mould technology will allow aeroplanes, mobile phone casings and suchlike to be made out of a miraculous type of glass which is as tough as metal, according to the inventors of the new process. So-called "metallic glass" has been well known since 1960 and has been in industrial production …
I wondered the same thing, and as far as I can see this stuff can't be made transparent. It seems it's more often known as "amorphous metal", though naturally the media prefer the far cooler sounding "metallic glass".
So I guess we won't be looking down through a glass floor from 30,000 feet any time soon.
for these disorder states of matter. Amorphous could also be applied. Most non-crystalline materials are not transparent. One of the routine challenges most organic chemists face when synthesising new compounds is to convert an often mass of sticky gum or stiff glass into a crystalline material.
"(Humphrey) Davy settled on aluminum by the time he published his 1812 book Chemical Philosophy: "This substance appears to contain a peculiar metal, but as yet Aluminum has not been obtained in a perfectly free state, though alloys of it with other metalline substances have been procured sufficiently distinct to indicate the probable nature of alumina."
(source - wikimadeupstuff.com)
Last time I checked, he was British...
From last August (Liquidmetal counter-inuitively makes solid metal glass):
http://www.crunchgear.com/2010/08/09/apple-buys-out-liquidmetal-patents-to-stay-one-step-ahead-in-materials-game/
According to the vid, metal glass is also super-bouncy. Paris, as she's super-bouncy too.
The biggest bugbear with plastics are the things like the European Waste disposal directive and/or further tightening of the recycling regime. Plastic can never be recycled properly. The recycled material is always inferior mechanically to the original one. Glass does not have this problem. So if you have to take back stuff the way electronics, cars and white goods are regulated in the EU (and most of the world) and if you are obliged to recycle at least 90%+ of it metal glass starts making LOTS of sense.
So if apple has bought the IPR on this it can now start driving 99% recycling or force the issue on recycling all casings, etc. It will be able to do it at much lower cost than its competitors and can demonstrate some green cred and keep the greenies happy.
As i understand it, while amorphous metal has some fantastic properties, it's not too good for load bearing or high stress use as small cracks propogate far easier through amorphous materials as crystal boundaries usually stop cracks propogating (this is why regular glass shatters so easily)
The "Glass" part of this is the structure, not the fact it is transparent. Metallic glass will look like metal but be an order of magnitude stronger because of it's glass like structure. Like how a glass vase is stronger whole than broken to bits and glued together.
So, another news article that is nothing to do with Apple (no more than any other phone or computer manufacturer), but we still have to have the obligitary Apple mention.
(If history is anything to go by, this feature will appear first in other smartphones, perhaps even feature phones, whilst Apple fans say "But why would I want that?" Then later it'll be featured in an Apple phone, and be hailed as revolutionary...)
A metalglass SIM removal tool? Couldn't they just have designed the phone properly so I didn't need specialised tooling to do something that every user (or at least every secondhand user) will have to do? You're right, that is mildly annoying.
Also, is it actually Metalglass or just perspex? using Metalglass seems like a lot of trouble to go to for a tool that shouldn't exist...
@"An injection moulding process that requires a megawatt or more for a fist-sized bullet is NOT going to be scaled up to the size of aircraft wings any time soon."
"a sub-millisecond period a full megawatt of power" ... is not the same as a megawatt hour. (Because its only a sub-millisecond period).
A capacitor bank could easily achieve a brief pulse at a megawatt. Also capacitor banks have been built much bigger than 1 megawatt per pulse.
In fact opacity depends on the bonding between different atoms. The near *total* lack of order in this solid might make it *more* opaque than crystallised metal.
Note that most metal glasses are made by rapid *cooling* at around 1000 000 deg /sec by praying a sheet at a fast spinning water cooled copper cylinder. Only the thinness of the sheets *allows* the cooling to be this fast. AFAIK the *big* use of this stuff is in transformers and other magnetic components due to *much* better magnetic properties. However their temperature limit is *low*. While the raw alloy might be good to the Curie point of the alloy this stuff will start loosing its properties c275c as the atoms start to move and in principle it will begin to re-crystallize outward from whatever crystalline material it's in contact with.
"...rather extremely rapid "ohmic heating". A brief but extremely powerful jolt of electric current is passed through the 2cm metalglass billet..."
We use a similar process to join pieces of metal all the time, albeit with a billet somewhat smaller in diameter ~3mm and usually covered in a protective material that burns off to prevent oxidation. Sometimes we use a shielding gas supplied from a tank and delivered through a handle that feeds very thin metal billet from a spool into the area of metal joining. I've heard some of the guys talk about using Russian jets but I think the fumes must be getting to them.