Effect of soda lime flux on evaluation of the critical cooling rate of Pd82Si18 amorphous ribbon

• Published in: AIP advances 2017-09, Vol.7 (9), p.095308-095308-5
• Main Authors: Wang, Xutong, Tian, Zhuang, Zeng, Mo, Nollmann, Niklas, Wilde, Gerhard, Tang, Chengying
• Format: Article
• Language: English
• Subjects: Cooling; Cooling rate; Flux; Intermetallic compounds; Lime; Nucleation
• ISSN: 2158-3226; 2158-3226
• DOI: 10.1063/1.4992069

Herein, we propose an experimental method based on the Barandiaran–Colmenero relation for evaluating the critical cooling rate (R c ) of Pd82Si18 amorphous ribbon. In this method, to determine the inherent R c of glass ribbon, heterogeneous nucleation is suppressed during the differential scanning calorimeter measurement process by adding soda lime flux. The R c values of Pd82Si18 amorphous ribbon were determined before and after soda lime treatment. The experimental results indicate that the R c values of the treated and non-treated ribbon are 10.27 and 148.39 K/s, respectively. The R c value of the treated sample is in good agreement with a previous experimental result. Johnson’s relation gives R c = 22.86 K/s, which confirms the validity of the present results. The results indicate that soda lime flux greatly suppresses heterogeneous nucleation during the measurement process and the inherent R c of Pd82Si18 is revised. This method provides a new way for evaluating the critical cooling rate by suppressing heterogeneous nucleation.