A study published in Nature on 14/10 by researchers from UC Berkeley, Lawrence Berkeley National Laboratory and the University of Oxford found that certain niobium-titanium alloys keep their damage resistance at 20 Kelvin, about -253°C. Metals often become brittle in extreme cold because crystal defects cannot move easily, but in these alloys small regions reorganise into nano-scale twin structures that create new defects, allowing the material to deform instead of fracturing suddenly. The researchers suggest the mechanism could be useful for liquid hydrogen tanks, clean fuel transport, deep-space probes and fusion reactors. However, the results come from test alloys, and real-world use would require further assessment of long-term durability, manufacturability and cost-effectiveness.
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Original headline: Sáng chế làm rung chuyển ngành vật liệu: Kim loại chịu nhiệt -253 độ C không giòn gãy, mở cánh cửa tương lai hàng loạt lĩnh vực
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