|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XIV
||Interface-Mediated Monatomic Metallic Glasses Formation Through Ultrafast Liquid Quenching
||Li Zhong, Jiangwei Wang, Hongwei Sheng, Ze Zhang, Scott Mao
|On-Site Speaker (Planned)
We report an experimental approach to vitrify monatomic metallic liquids by achieving an unprecedented high liquid quenching rate of 10<SUP>14</SUP> K/s under in-situ transmission electron microscope. Under such a high cooling rate, melts of pure refractory BCC metals, such as liquid tantalum and vanadium, are, for the first time, successfully vitrified to form MGs suitable for property interrogations. With the in-situ TEM observation we investigated the formation condition and thermal stability of the as-obtained monatomic MGs. The availability of monatomic MGs being the simplest glass formers offers unique possibilities to study the structure and property relationships of glasses. Our technique also exhibits great control over the reversible vitrification-crystallization processes, suggesting its potential in micro-electro-mechanical applications. The ultra-high cooling rate, approaching the highest liquid quenching rate attainable in the experiment, makes it possible to explore the fast kinetics and structural behavior of supercooled metallic liquids within the nano- to pico-second regimes.
||Planned: Supplemental Proceedings volume