Nearly free electron model to glass-forming ability of multi-component metallic glasses

Nearly free electron model to glass-forming ability of multi-component metallic glasses
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多元金属玻璃玻璃形成能力的近自由电子模型

DOI:
10.1016/j.jnoncrysol.2012.10.026
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发表时间:
2013-02
影响因子:
3.5
通讯作者:
Shen, Baolong
Shen, Baolong
中科院分区:
材料科学2区
文献类型:
--
作者:
Dun, Chaochao;Li, Jiawei;Zhao, Yucheng;Shen, Baolong

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提出了一个解释多元块体金属玻璃形成能力的近似自由电子模型。从该模型可以看出,玻璃的密度与玻璃的GFA密切相关,当玻璃的费米能级态密度(DOS)接近晶体的一个能级时,可以获得最佳的GFA。此外,通过对(Fe_(1-x)Cox)_(71.4)Cu_(0.6)B_(20)Si_(4 Nb_4)(x=0,0.1,0.3,0.5,0.7at.%)的系统研究,提供了令人信服的实验证据。BMG。我们的研究结果强调了密度对MG形成的显著影响,并阐明了MG中玻璃形成倾向可能增强的一个过程。
A nearly free electron model for explaining the glass-forming ability (GFA) of multi-component bulk metallic glasses (BMGs) is proposed. It can be drawn from this model that the density is closely correlated with the GFA of BMGs and the best GFA can be obtained when the densities of states (DOS) at Fermi level for glasses nearly touch one of the crystalline. Moreover, compelling experimental evidence is provided through systematic study of bulk (Fe1-xCox)71.4Cu0.6B20Si4Nb4(x=0, 0.1, 0.3, 0.5, and 0.7at.%) BMGs. Our results highlight the significance density effects on the formation of MGs, and elucidate one process by which the glass-forming tendency may be enhanced in MGs.
DOI: 10.1557/proc-554-21
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