Influence of mutual substitution between La and Gd on the glass-forming ability of Al–Ni–La–Gd alloys
Influence of mutual substitution between La and Gd on the glass-forming ability of Al–Ni–La–Gd alloys
复制标题
DOI：
10.1016/j.jallcom.2014.12.180
复制
发表时间：
2015-04
影响因子：
6.2
通讯作者：
Jian Yi;W. Xu;X. Xiong;Long Kong;M. Ferry;Jinfu Li
中科院分区：
文献类型：
--
作者：
Jian Yi;W. Xu;X. Xiong;Long Kong;M. Ferry;Jinfu Li
在相同条件下，将A = 9-10,b= 4.5-5.5, x= 0-1的一系列Al100-a-bNia （La1-xGdx）球吸铸到楔形铜模具中，研究组分对玻璃形成能力（GFA）的依赖关系。除最佳玻璃原体（Al85.5Ni9.5La(Gd)5）外，当给定稀土元素（La或Gd）被另一种稀土元素部分取代时，三元合金的GFA均得到增强。随着Ni含量的降低，La和Gd对最佳GFA的相互取代含量增加。用Miracle的原子填充效率模型解释了La和Gd相互取代对GFA的增强作用。
A series of Al100–a–bNia(La1–xGdx)balloys, wherea= 9–10,b= 4.5–5.5 andx= 0–1, were suction cast under identical conditions into a wedge-shaped copper mold for investigating the compositional dependence of glass-forming ability (GFA). The GFA of the ternary alloys, except for the optimal glass former (Al85.5Ni9.5La(Gd)5), is enhanced when a given rare earth element (La or Gd) is partially substituted by the other. The mutual substitution content between La and Gd for the optimal GFA increases with a decrease in Ni content. The enhancement of GFA by the mutual substitution between La and Gd was interpreted based on Miracle’s model of atom packing efficiency.