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Metallic glasses are “born” upon cooling alloy melts fast enough to avoid crystal nucleation.Through glass transition,these glasses naturally inherit their mother liquids' structures, thus realizing the sampling of relatively high-energy,local minima or inherent structures of the potential energy landscape.Their crystalline counterparts, by contrast, reside in the global minimum of landscape with the lowest potential energy.Intriguingly, metallic glasses can have their affluent energy further enhanced via various rejuvenation methods [1], along with remarkable tuning of their mechanical and physical properties.The highly energetic feature of metallic glasses has long aroused abroad interest.For example, at the moment of fracture, violent sparking or intense light emission was often observed for the Zr-based bulk metallic glasses [2], accompanied by flash temperatures up to several thousand degrees.Similar phenomena were also observed during high-speed machining [3] or hypervelocity impact [4], suggesting that fractoemission of light in metallic glasses is associated with pyrolysis or oxidation of fresh material exposed during rupture in air.For this type of glassy metals,at what level is their combustion heat indeed? Are they promising candidates to serve as energetic materials?