Effect of soda lime flux on evaluation of the critical cooling rate of Pd82Si18 amorphous ribbon
Effect of soda lime flux on evaluation of the critical cooling rate of Pd82Si18 amorphous ribbon
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DOI：
10.1063/1.4992069
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发表时间：
2017-09
期刊：
影响因子：
1.6
通讯作者：
Xutong Wang;Zhuang Tian;M. Zeng;N. Nollmann;G. Wilde;Chengying Tang
中科院分区：
文献类型：
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作者：
Xutong Wang;Zhuang Tian;M. Zeng;N. Nollmann;G. Wilde;Chengying Tang
本文提出了一种基于Barandiaran-Colmenero关系的实验方法来评估Pd82Si18非晶带的临界冷却速率（Rc）。该方法通过在差示扫描量热计测量过程中加入碱石灰助熔剂抑制玻璃带的非均相成核来测定玻璃带的固有Rc。测定了碱石灰处理前后Pd82Si18非晶带的Rc值。实验结果表明，经处理和未处理的带的Rc值分别为10.27和148.39 K/s。处理后样品的Rc值与先前的实验结果吻合较好。Johnson关系式给出Rc = 22.86 K/s，证实了本文结果的有效性。结果表明，在测量过程中，钠石灰助熔剂对Pd82Si18的非均相成核有明显的抑制作用，并修正了Pd82Si18的固有Rc值。该方法为通过抑制高温来计算临界冷却速率提供了一种新的方法。
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 heter...