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harder than steel: it bends but does not break

The findings of researchers from Berkeley and the California Institute of Technology

Researchers at the Lawrence Berkeley National Laboratory U.S. Department of Energy and the California Institute of Technology have developed a new type of glass consists of a metallic palladium microalloying with phosphorus, silicon, germanium and silver which has shown resistance to impacts more than any other known material.

bends but does not break - The secret to success lies in making this cocktail glass, plastic and thus able to react to stress bending without breaking. In fact, the glass is particularly prone to chip, while in metals the crystalline structure prevents the propagation of cracks. According to Robert Ritchie, a researcher who led the project, with future developments in the metallic glass, and already know of new enhancements to the addition of silver microalloying has significantly increased performance and has enabled to make sheets of glass with a thickness greater. The five elements are all essential, therefore, as pointed out by Ritchie, but especially the palladium to give the new glass that he lacked the strength, thanks to a high ratio of stiffness that counteracts and compensates for the extreme fragility of glass materials. In addition, the palladium (silver-like substance, which sometimes replaces it as a trace element contents in minerals such as chalcopyrite) in the cold working increases the resistance and hardness.

POSSIBLE APPLICATIONS - For now, the new composition is still being tested, but it is likely that in future will also be used for consumer electronics. Tough, durable and very tolerant to damage: the new glass at the Lawrence Berkeley National Laboratory could soon retire the Gorilla Glass, the screen resistant to impact and scratch recently adopted by Apple.

SOURCE: Emanuela Di Pasqua (corriere.it)