The e/a factor governing the formation and stability of (Zr76Ni24)1−xAlx bulk metallic glasses
The e/a factor governing the formation and stability of (Zr76Ni24)1−xAlx bulk metallic glasses
复制标题
DOI：
10.1016/s1359-6462(03)00129-5
复制
发表时间：
2003-06
影响因子：
6
通讯作者：
Y. M. Wang;C. Shek;J. Qiang;C. Wong;Weirong Chen;C. Dong
中科院分区：
文献类型：
--
作者：
Y. M. Wang;C. Shek;J. Qiang;C. Wong;Weirong Chen;C. Dong
本文制备了（Zr 76 Ni 24）1− xAl x合金，研究了每个原子的电子数e/a对其玻璃形成能力的影响。在该合金系列中获得的块体金属玻璃（BMG）具有从1.37至1.53的e/a跨度。它们的热稳定性随着e/a比的增加而增加。最大的热稳定性被发现在Zr 60 Al 21 Ni 19与最高可能的e/a=1.53。在80-293 K的温度范围内，BMG的电阻率呈现负的温度系数和近似线性的温度依赖关系。讨论了Nagel-Tauc猜想2kf·kp对这些BMG稳定性的有效性。基于e/a的规则是一种很有前途的方法来定位Zr基多元合金系统中的玻璃形成成分。
In the present paper (Zr76Ni24)1−xAlxalloys were prepared to investigate the influence of e/a, electron number per atom, on their glass-forming abilities. The bulk metallic glasses (BMGs) obtained in this alloy series have an e/a span from 1.37 to 1.53. Their thermal stability increases with the e/a ratios. The largest thermal stability is found at Zr60Al21Ni19with the highest possible e/a=1.53. These BMGs manifest negative temperature coefficients of resistivity and a nearly linear T-dependence of resistivity within the temperature span 80–293 K. The validity of the Nagel–Tauc conjecture, 2kf≈kpfor the stabilities of these BMGs is discussed. The e/a-based rule is a promising way to locate glass-forming compositions in the Zr-based multi-component alloy systems.