Disordered solids,including various types of glasses,such as metallic glasses (MGs),ceramic glasses and polymeric glasses,possess an amorphous or aperiodic arrangement of their building blocks,such as atoms,ions and m...Disordered solids,including various types of glasses,such as metallic glasses (MGs),ceramic glasses and polymeric glasses,possess an amorphous or aperiodic arrangement of their building blocks,such as atoms,ions and molecules.At first sight,this is similar to the structure of their corresponding liquids,lacking any long-range translational symmetry as in crystalline solids.As a result,disordered solids usually exhibit a unique combination of properties,and are an indispensable class of engineering materials.For instance,MGs exhibit superb strength, high elastic limit,and outstanding corrosion-and wear- resistance,which is ideal for making sporting and medical apparatus.However,disordered solids,particularly structural glasses,could be very brittle under an ambient condition.Catastrophic failures can take place in them without noticeable plasticity [1,2].In practice,this severely hinders the applications of disordered solids as a reliable structural material;therefore,the origin of plas- ticity in disordered solids,if any,has been remaining in decades as one of the most active topics in materials science and engineering.展开更多
基金the research funding from Research Grant Council (RGC) of Hong Kong with the grant number CityU 11207215 and CityU11209317
文摘Disordered solids,including various types of glasses,such as metallic glasses (MGs),ceramic glasses and polymeric glasses,possess an amorphous or aperiodic arrangement of their building blocks,such as atoms,ions and molecules.At first sight,this is similar to the structure of their corresponding liquids,lacking any long-range translational symmetry as in crystalline solids.As a result,disordered solids usually exhibit a unique combination of properties,and are an indispensable class of engineering materials.For instance,MGs exhibit superb strength, high elastic limit,and outstanding corrosion-and wear- resistance,which is ideal for making sporting and medical apparatus.However,disordered solids,particularly structural glasses,could be very brittle under an ambient condition.Catastrophic failures can take place in them without noticeable plasticity [1,2].In practice,this severely hinders the applications of disordered solids as a reliable structural material;therefore,the origin of plas- ticity in disordered solids,if any,has been remaining in decades as one of the most active topics in materials science and engineering.
