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

• Main Authors: Xutong Wang, Zhuang Tian, Mo Zeng, Niklas Nollmann, Gerhard Wilde, Chengying Tang
• Format: Article
• Language: English
• Published: AIP Publishing LLC 2017-09-01
• Series: AIP Advances
• Online Access: http://dx.doi.org/10.1063/1.4992069

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