Fracture-resistant thin-film metallic glass: Ultra-high plasticity at room temperature
作者： Chia-Chi Yu , C. M. Lee , Jinn P. Chu , J. E. Greene , Peter K. Liaw
DOI: 10.1063/1.4966932
关键词:
摘要: We report the first example of room-temperature rubber-like deformation in thin-film metallic glasses (TFMGs), 260-nm-thick Zr60Cu24Al11Ni5 layers, under ultra-high shear strain. The TFMGs were deposited, with no external heating, on Zr-based bulk glass (BMG) and Si(001) substrates by rf magnetron sputtering a 3 mTorr Ar plasma. Cross-sectional transmission electron microscopy (XTEM) analyses nanoindentation results reveal that undergo an incredibly large strain, estimated to be ∼4000%, during fatigue tests, thickness reductions up 61.5%, shear-banding or cracking, extreme experiments extending through film into substrate. TFMG/BMG samples also exhibit film/substrate diffusion bonding as shown high-resolution XTEM.
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