Predicting the glass-forming-ability of alloys by molecular dynamics simulation: A working example of ti-co bulk metallic glasses

Su Wen Kao, Ke Chin Yang, Shuo Hong Wang, Chi Chuan Hwang, Pee Yew Lee, Rong Tan Huang, Tsung Shune Chin

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

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 1mm rods. Experiment tests confirm that the compositions Ti60Co40 and Ti70Co730, 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.

Original languageEnglish
Article number061301
JournalJapanese journal of applied physics
Volume48
Issue number6
DOIs
Publication statusPublished - 2009 Jun

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy

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