Specialists from NUST MISIS, in collaboration with colleagues from China, have developed a new composite material. It retains strength and ductility even at extremely low temperatures below -150 °C, the university's press service reported.
The new composite is based on metal and metallic glass. Thanks to its special structure, the material does not break into many fragments upon impact. This effect is ensured by special transition processes at the interface of crystalline and amorphous metallic alloys.
The appearance of a crack at this boundary leads to jumps of atoms in front of the crack tip, which causes strong local heating of the material. The heated metal is more ductile, it changes the nature of the fracture and slows down the crack. This allows the sample to maintain strength at low temperatures.
The technology for creating the new composite is based on classical soldering and does not require high costs. The multilayer composite material is planned for use in astronautics, cryogenic industry, and polar latitudes.
Earlier, www1.ru reported that the Kurchatov Institute is developing a new lightweight and ultra-strong material for bulletproof vests.
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