Liquid dynamics and glass formation of Gd55Co20Al25 metallic glass with minor Si addition
Liquid dynamics and glass formation of Gd55Co20Al25 metallic glass with minor Si addition
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添加少量 Si 的 Gd55Co20Al25 金属玻璃的液体动力学和玻璃形成
DOI:
10.1016/j.jmst.2020.11.024
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发表时间:
2021-06
影响因子:
10.9
通讯作者:
Bian Xiufang
中科院分区:
文献类型:
--
作者:
Xue Lin;Shao Liliang;Luo Qiang;Hu Lina;Zhao Yunbo;Yin Kuibo;Zhu Mingyun;Sun Litao;Shen Baolong;Bian Xiufang
Liquid dynamics plays an essential role in glass formation.Here we observed a distinct change of liquid dynamics in Gd_(55)Co_(20)Al_(25) metallic glass induced by microalloying Si element.In the equilibrium melt,minor Si (0.5 at.%) addition leads to a more fragile liquid behavior and a smaller strength of liquid-liquid transition with the transition strength (ΔF) decreasing from 0.76 to 0.35.However,in the supercooled liquid,Si-doped liquid exhibits a remarkable enhanced fragile-to-strong transition (FST),and the value of FST factor f increases sharply from 1.63 to 3.84,resulting in a stronger liquid behavior and more sluggish crystallization kinetics for Gd_(55)Co_(20)Al_(24.5)Si_(0.5) metallic glass.Moreover,minor Si addition promotes the formation of a crystal-like structure with a size of 1 -2 nm.The interactions between the crystal-like structures and other local favored clusters frustrate the further growth of crystal-like phases,thus stabilizes the amorphous structure.As a result,the glass-forming ability (GFA) was largely improved.The critical diameter of Gd_(55)Co_(20)Al_(25) metallic glass increased from 2 to 7 mm with 0.5 at.% Si addition without deterioration of the magnetocaloric effect.This study provides valuable insight for understanding the distinct effect of microalloying on GFA of metallic glasses from the aspect of the evolution of the liquid.
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影响因子:
24.2
作者:
Haibin Yu;Weihua Wang;K. Samwer
通讯作者:
Haibin Yu;Weihua Wang;K. Samwer
影响因子:
8.3
作者:
Yang M.;Liu X. J.;Wu Y.;Wang H.;Wang X. Z.;Lu Z. P.
通讯作者:
Lu Z. P.
影响因子:
3.5
作者:
Dun, Chaochao;Li, Jiawei;Zhao, Yucheng;Shen, Baolong
通讯作者:
Shen, Baolong
DOI:
10.1007/s11661-008-9615-1
发表时间:
2009-06-01
影响因子:
2.8
作者:
Nouri, A. Shamimi;Liu, Y.;Lewandowski, J. J.
通讯作者:
Lewandowski, J. J.
DOI:
10.1088/0953-8984/10/17/014
发表时间:
1998-05
期刊:
Journal of Physics: Condensed Matter
影响因子:
--
作者:
T. Pradell;D. Crespo;N. Clavaguera;M. Clavaguera-Mora
通讯作者:
T. Pradell;D. Crespo;N. Clavaguera;M. Clavaguera-Mora