[Introduction] A new type of loss-tolerant metallic glass has been proven to exceed the strength and toughness of any known material. The researchers of the United States Department of Energy (DOE), Lawrence Berkeley National Laboratory (Berkeley Laboratory) and the California Institute of Technology The test passed this new discovery. Can glass be stronger and stronger than steel? A new type of loss-tolerant metallic glass has been proven to exceed the strength and toughness of any known material. US Department of Energy (DOE), Lawrence Berkeley National Laboratory (Berkeley Laboratories) The new discovery was passed in cooperation with researchers from the California Institute of Technology. Even more surprising is that this glass seems to be ready for daily use soon. Glass that is harder than steel "Our research results mark the first strategic use of metallic glass manufacturing. We believe that this process can be used to make stronger and tougher glass products." Berkeley Laboratory Materials Scientist who chaired the study Robert Rich said. This new type of metal glass adds some traces of palladium, a hard metal element with an ultra-high "volume shear rate", which offsets the inevitable fragility and fragility of glass materials. "Due to the high volumetric shear rate of metal containing palladium, the energy required for the formation of the shear band is much lower than the energy of the shear band breaking into a crack," Rich explained. "This leads to this kind of glass It has super plasticity and can resist huge impact, which can only make it bend, not break. " Ritchie is a project host jointly appointed by the Department of Materials Science at Berkeley Laboratories and the Department of Materials Science and Engineering at the University of California, Berkeley. The research results were published in the journal Nature, and Professor Ritchie is also one of the authors. Glass materials have an amorphous, amorphous structure, making them very strong, but also extremely fragile, and the crystal structure of the metal can provide resistance to cracking (including some impurities, grain boundaries, etc.), thus Inhibit the formation and expansion of cracks. And glass does not have this crystal structure, so it is impossible to stop the crack propagation of cracking. This problem is even more acute on metal glass, even a small shear band can expand catastrophically under the influence of a weak force. In the early research work, in collaboration with the Berkeley Laboratory and the California Institute of Technology, a metallic glass called "DH3" was manufactured, in which the intervention of the metal crystal phase can block the crack propagation. This metal crystalline phase takes the form of dendrites and penetrates into the amorphous structure of the glass to prevent the crack from propagating into an open crack. In this new process, the collaborators produced a pure glass material, whose unique chemical composition played a role in promoting the formation of multiple shear bands to stop the expansion of cracks. "The game we play with cracks is to extend the cracks as much as possible. Through the synthesis of other glass metals, the entire material has a stronger plasticity change before breaking." Rich said, "In addition, the palladium element can provide excellent , Unusual shielding ability, has a magical effect in dealing with the open cracks of amorphous materials. This gives our metallic glass a toughness comparable to the hardest metals known. This kind of solidity and toughness The combination, or the rare combination of damage-resistant ductility, is beyond the range of the strongest and strongest materials we know. " The original new glass material sample was a mixture of trace palladium elements containing phosphorus, silicon and germanium, and a glass rod with a diameter of about one millimeter was obtained. Later, researchers at the California Institute of Technology added silver to expand the thickness of the glass rod to Six millimeters. The size of this metallic glass is limited, and it must be rapidly cooled or "quenched" to obtain the final amorphous liquid metal. "Our experience is that in order to make metallic glass, we need at least five elements. In this way, when we cool the material, it does not know what sort of crystal structure to order, so as to have an amorphous state." Rich said. "The traditional view is that the strength and toughness of materials are a pair of mutually exclusive properties. This makes our metallic glass irritating to challenge people's intelligence. We are going against the current, putting the hard properties of glass on the metal In an envelope that resists loss of ductility. " This research has been identified and tested at the US Department of Energy ’s Office of Science, and the National Institute of Science ’s manufacturing work is supported by the California Institute of Technology. Mini Axe Hatchet,Mini Outdoor Axe,Best Outdoor Hatchet,Best Survival Hatchet Yangjiang Gold Source Industrial Co., Ltd. , https://www.xinbigo.com