Scientists from the Russian National Research and Technology University and China University of Mining and Technology (Beijing) have developed a new composite compound that can maintain mechanical properties even under extremely cold conditions (-150 ℃). The research team has developed a layered composite material based on metal and metal glass compounds. This material will not undergo brittle fracture at extremely low temperatures. The new material will not shatter into many fragments when subjected to impact, which is related to the special transient process at the boundary between crystalline and amorphous metal alloys. The appearance of cracks at this boundary will cause atomic transitions before the crack tip, resulting in strong local heating of the material. The metal after heating is more malleable, which can change its fracture properties and inhibit crack propagation. This allows the sample to maintain its strength even under low temperature conditions. The composite material based on crystalline metal and metallic glass that is currently under development is easy to obtain and can be easily processed and modified. Its manufacturing technology is based on traditional welding of materials with different compositions. The team has theoretically and experimentally determined the effective temperature at which metallic glass will not crystallize under conditions of good "correlation" among its components. In the future, the team plans to improve the manufacturing technology of this composite material. They will also improve its composition to enhance its mechanical strength and radiation resistance under low temperature conditions. The team believes that this achievement can be used to manufacture machine components and structures that operate under low or ultra-low temperature conditions, and has broad application prospects in aerospace, low-temperature industry, and polar fields. (New Society)