Metallic Glass Stronger Than Steel
Researchers have created a new kind of damage-tolerant metallic glass that may be tougher than any other known material. The new metallic glass is a microalloy featuring palladium, a metal with a high "bulk-to-shear" stiffness ratio that counteracts the intrinsic brittleness of glassy materials.
"Because of the high bulk-to-shear modulus ratio of palladium-containing material, the energy needed to form shear bands is much lower than the energy required to turn these shear bands into cracks," Ritchie says. "The result is that glass undergoes extensive plasticity in response to stress, allowing it to bend rather than crack."
(Damage-tolerant metallic glass)
This micrograph of a deformed notch in palladium-based metallic glass shows extensive plastic shielding of an initially sharp crack. The inset is a magnified view of a shear offset (arrow) developed during plastic sliding before the crack opened.
"These results mark the first use of a new strategy for metallic glass fabrication and we believe we can use it to make glass that will be even stronger and more tough," says Robert Ritchie, a materials scientist who led the Berkeley contribution to the research.
"Our game now is to try and extend this approach of inducing extensive plasticity prior to fracture to other metallic glasses through changes in composition," Ritchie says. "The addition of the palladium provides our amorphous material with an unusual capacity for extensive plastic shielding ahead of an opening crack. This promotes a fracture toughness comparable to those of the toughest materials known. The rare combination of toughness and strength, or damage tolerance, extends beyond the benchmark ranges established by the toughest and strongest materials known."
Science fiction fans recall the metalloglass buildings in the comic strip version of Buck Rogers in the 25th Century. As far as I know, there is no reference to "metalloglass" in Philip Nowlan's 1928 novel Armageddon: 2419, which introduced Buck Rogers to the world.
I also thought of the tower of glass from Robert Silverberg's 1970 eponymous story.
Compare to the glassite seen in Edmond Hamilton (and probably other) stories; it is used as a material for transparent bubble-style helmets for space-suits, and as a building material:
The Terra Hotel stood in a garden at the edge of town, fronting the moonlit immensity of the desert. This glittering glass block, especially built to cater to the tourist trade from Earth, was Earth-conditioned inside...
The place had glassite walls and ceiling, and was designed to give an impression of the navigating bridge of a space-ship.
(From The World with a Thousand Moons by Edmond Hamilton )
Via Lab Spaces; thanks to Winchell Chung for the tip and the reference for this story.
Scroll down for more stories in the same category. (Story submitted 1/12/2011)
Follow this kind of news @Technovelgy.
| Email | RSS | Blog It | Stumble | del.icio.us | Digg | Reddit |
you like to contribute a story tip?
Get the URL of the story, and the related sf author, and add
Comment/Join discussion ( 8 )
Related News Stories -
Self-Healing Circuits From Carnegie Mellon
'It even had an inter-skin layer of gum that could seal the punctures...'- Raymond Z. Gallun, 1951.
Dune Fans! Metal-Organic Frameworks Make Science Fiction Real
'Dew collectors,' he muttered, enchanted by the simple beauty of such a scheme. - Frank Herbert, 1965.
Fungi-Infused Concrete Repairs Itself
'I noticed that curious mottled knots were forming, indicating where the room had been strained and healed faultily.'- J.G. Ballard, 1962.
3D Printed Graphene Aerogel - So Light!
'... light as cork and stronger than steel...' - Edgar Rice Burroughs, 1929.
Technovelgy (that's tech-novel-gee!)
is devoted to the creative science inventions and ideas of sf authors. Look for
the Invention Category that interests
you, the Glossary, the Invention
Timeline, or see what's New.
Las Vegas Humans Ready To Strike Over Robots
'A worker replaced by a nubot... had to be compensated.'
You'll Regrow That Limb, One Day
'... forcing the energy transfer which allowed him to regrow his lost fingers.'
Elon Musk Seeks To Create 1941 Heinlein Speedster
'The car surged and lifted, clearing its top by a negligible margin.'
Somnox Sleep Robot - Your Sleepytime Cuddlebot
Science fiction authors are serious about sleep, too.
Real-Life Macau or Ghost In The Shell
Art imitates life imitates art.
Has Climate Change Already Been Solved By Aliens?
'I had explained," said Nessus, "that our civilisation was dying in its own waste heat.'
First 3D Printed Human Corneas From Stem Cells
Just what we need! Lots of spare parts.
VirtualHome: Teaching Robots To Do Chores Around The House
'Just what did I want Flexible Frank to do? - any work a human being does around a house.'
Messaging Extraterrestrial Intelligence (METI) Workshop
SF writers have thought about this since the 19th century.
Nanorobots Roam Your Bloodstream, Cleaning It
Too bad they won't have lasers, though...
Galini 3D Printed Sleeping Pod Tiny Houses
'The houses are prefabricated units...'
MIT Boffins Create Psychopath AI On Purpose
There's a lesson in this for neural net AI engineers everywhere.
Skin Electronics 3D Printed
'June's body is a tracery of lambent lines, like some arcane capillary circuitry...'
Artificial Sensory Neurons For Prosthetics, Robots
Great for humans and robots!
China Uses Artificial Intelligence To Grade Student Papers
Looks like the City Fathers are starting to take over China's education system.
Electronic Tongues Will Rule The Kitchen
'Install taste buds in the end of one tentacle...'
More SF in the News Stories
More Beyond Technovelgy science news stories