Relaxation and crystallization studied by observing the surface morphology evolution of atomically flat Pt57.5Cu14.7Ni5.3P22.5 upon annealing
Relaxation and crystallization studied by observing the surface morphology evolution of atomically flat Pt57.5Cu14.7Ni5.3P22.5 upon annealing
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DOI：
10.1016/j.scriptamat.2020.02.035
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发表时间：
2020-06
影响因子：
6
通讯作者：
Zheng Chen;A. Datye;Jittisa Ketkaew;S. Sohn;Chao Zhou;Omur E. Dagdeviren;J. Schroers;U. Schwarz
中科院分区：
文献类型：
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作者：
Zheng Chen;A. Datye;Jittisa Ketkaew;S. Sohn;Chao Zhou;Omur E. Dagdeviren;J. Schroers;U. Schwarz
通过原子力显微镜研究了在热处理过程中通过复制 SrTiO3 单晶热塑形成的 Pt57.5Cu14.7Ni5.3P22.5 大块金属玻璃的表面形貌的演变。由于独特的压印工艺，块状金属玻璃的表面呈现出亚埃表面粗糙度的阶梯状结构。当加热到材料的玻璃化转变温度以上时，表面会通过平滑台阶和增加平台表面粗糙度来重新排列和松弛，形成更稳定、更致密的玻璃。随着退火温度的进一步升高，由于排列动力学的增加和结晶的开始，观察到显着的表面变化。
The evolution of the surface morphology of Pt57.5Cu14.7Ni5.3P22.5bulk metallic glasses thermoplastically formed by replication of SrTiO3single crystals during heat treatments is investigated by atomic force microscopy. Due to the unique imprinting process, the surface of the bulk metallic glass features a terraced structure with sub-angstrom surface roughness. 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.