Effects of substitution of La by other rare-earth elements on the glass forming ability of Al86Ni9La5 alloy
Effects of substitution of La by other rare-earth elements on the glass forming ability of Al86Ni9La5 alloy
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DOI：
10.1016/j.jnoncrysol.2013.03.018
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发表时间：
2013-06
影响因子：
3.5
通讯作者：
Zhang Zhang-Zhang;X. Xiong;J. Yi;Jinfu Li
中科院分区：
文献类型：
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作者：
Zhang Zhang-Zhang;X. Xiong;J. Yi;Jinfu Li
通过控制制备条件，吸铸楔形样品，研究了Sc、Dy、Gd或Ce部分取代La对Al86Ni9La5玻璃形成能力（GFA）的影响。结果表明，除Sc外，此类替代物均提高了合金的GFA，其中Al86Ni9La3.5Gd1.5的GFA最好。从热力学和拓扑的角度分析了GFA。研究发现Al86Ni9La3.5RE1.5的GFA不仅与玻璃形成的热力学驱动力密切相关，而且还与原子堆积效率密切相关。 Al17RE 较高的填充效率和稳定性对应于较好的 GFA。
The influence of La partially substituted by Sc, Dy, Gd or Ce on the glass forming ability (GFA) of Al86Ni9La5was investigated by suction casting wedge-shaped samples with preparation conditions controlled. The results show that except Sc, such substitutions enhance the GFA of the alloy, and Al86Ni9La3.5Gd1.5exhibits the best GFA among them. The GFA was analyzed from the thermodynamic and topological points of view. It was found that the GFA of Al86Ni9La3.5RE1.5is strongly correlated to not only the thermodynamic driving force for the glass formation but also the atomic packing efficiency. Higher packing efficiency and stability of Al17RE correspond to better GFA.