Structural Origins of the Excellent Glass Forming Ability of Pd40Ni40P20
Structural Origins of the Excellent Glass Forming Ability of Pd40Ni40P20
复制标题
DOI：
10.1103/physrevlett.108.175501
复制
发表时间：
2012-04-24
影响因子：
8.6
通讯作者：
Chen, M. W.
中科院分区：
文献类型：
--
作者：
Guan, P. F.;Fujita, T.;Chen, M. W.
我们报告了一种混合原子堆积方案，由共价键介导的“立体化学”结构和块状金属玻璃 Pd40Ni40P20 中的密集堆积的二十面体组成。两种原子堆积模型的共存可以同时满足类金属元素的电荷饱和和金属元素的最密原子堆积的标准。混合堆积方案揭示了 Pd40Ni40P20 优异的玻璃形成能力的结构起源，对于理解金属-非金属合金的块状金属玻璃形成具有重要意义。
We report a hybrid atomic packing scheme comprised of a covalent-bond-mediated "stereochemical" structure and a densely packed icosahedron in a bulk metallic glass Pd40Ni40P20. The coexistence of two atomic packing models can simultaneously satisfy the criteria for both the charge saturation of the metalloid element and the densest atomic packing of the metallic elements. The hybrid packing scheme uncovers the structural origins of the excellent glass forming ability of Pd40Ni40P20 and has important implications in understanding the bulk metallic glass formation of metal-metalloid alloys.