|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Bulk Metallic Glasses XV
||Determination of Critical Cooling Rates in Metallic Glass Forming Alloy Libraries through Laser Spike Annealing
||Punnathat Bordeenithikasem, Jingbei Liu, Sebastian Kube, Yanglin Li, Tianxing Ma, Ellen Scanley, Douglas Hofmann, Christine Broadbridge, Joost Vlassak, Jonathan Singer, Jan Schroers
|On-Site Speaker (Planned)
The glass forming ability (GFA) of metallic glasses (MGs) is most directly quantified by the critical cooling rate (RC). Despite its significance, RC has been experimentally determined for only a small fraction of glass forming alloys due to experimental difficulties. We present a high-throughput combinatorial method to directly measure RC for large compositional ranges. We synthesized compositionally-graded alloy libraries, which were then melted and cooled at various rates using scanning laser spike annealing. The libraries were then characterized with combinatorial X-ray diffraction, energy dispersive X-ray spectroscopy, and optical microscopy. In conjunction with computer simulations based on laser parameters, RC values across a vast compositional space were mapped out. When combined with existing theories based on a priori known parameters and precise-but-slow bulk sample approaches, our method is powerful for materials discovery and, when correlating with chemistry and other properties, for a deeper understanding of MG formation.
||Planned: Supplemental Proceedings volume