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Title: Predicting the glass-forming-ability of alloys by molecular dynamics simulation: A working example of Ti-Co bulk metallic glasses
Authors: Su-Wen Kao;Ke-Chin Yang;Shuo-Hong Wang;Chi-Chuan Hwang;Pee-Yew Lee;Rong-Tan Huang;Tsung-Shune Chin
Contributors: 國立臺灣海洋大學:光電科學研究所
Date: 2009
Issue Date: 2017-02-21T07:47:13Z
Publisher: Japanese Journal of Applied Physics
Abstract: Abstract: Predicting the glass-forming-ability (GFA) of alloys before experimental trials has long been a pursuit in the exploration of bulk metallic glasses (BMGs). Researchers can determine GFA criteria, such as reduced glass-transition temperature (Trg) and gamma factor concluded only from experimental data in prepared amorphous metals, but not beforehand. This study predicts the GFA of binary TixCo100-x system, where x = 60, 70, 77 and 84 (hyper-eutectic, eutectic to hypo-eutectic compositions) by calculating their Trg using molecular dynamics simulation with modified tight-binding potentials. The same compositions were also melted and injection-cast into 1 mm rods. Experiment tests confirm that the compositions Ti60Co40 and Ti70Co30, having calculated Trg> 0.5, were able to produce BMGs. Both calculation and differential thermal analysis indicate that Ti–Co BMGs have exceptionally high glass-transition temperatures.
Relation: 48(6)
Appears in Collections:[Institute of Optoelectronic Sciences] Periodical Articles

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