|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIX
||Property studies on atomically smooth nanoimprinted metallic glasses
||Amit Datye, Zheng Chen, Chao Zhou, Xinzhe Wang, Jan Schroers, Udo Schwarz
|On-Site Speaker (Planned)
In recent years, nanoimprinting of bulk metallic glasses (BMGs) by thermoplastic forming has enabled the manufacturing of samples made from Pt57.5Cu14.7Ni5.3P22.5 BMG featuring atomically smooth terraces using SrTiO3 single crystals as molds . Due to their sub-angstrom RMS surface roughness, these atomically smooth samples are ideally suited to be used in high-resolution investigations of BMG properties by surface-sensitive methods such as atomic force microscopy. In this research, the effect of annealing-induced relaxation and crystallization on surface morphology is studied. Upon heating over the material’s glass transition temperature, the surface rearranges and relaxes towards a more stable, denser packed glass by smoothening out steps and increasing on-terrace surface roughness . With further increasing annealing temperatures, substantial surface alterations are observed because of increased arrangement kinetics and the onset of crystallization.  Rui Li et al., Communications Physics 1, 75 (2018).  Zheng Chen et al., Scripta Materialia 182, 32 (2020).
||Characterization, Mechanical Properties, Nanotechnology