Atomic and electronic structures of Zr-(Co,Ni,Cu)-Al metallic glasses

Atomic and electronic structures of Zr-(Co,Ni,Cu)-Al metallic glasses
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Zr-(Co,Ni,Cu)-Al金属玻璃的原子和电子结构

DOI:
10.1063/1.4734390
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发表时间:
2012-07
影响因子:
4
通讯作者:
Xi, X. K.
Xi, X. K.
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Yuan, C. C.;Shen, X.;Cui, J.;Gu, L.;Yu, R. C.;Xi, X. K.

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利用~(27)Al核磁共振(NMR)谱研究了过渡金属-类金属基Zr_(60)Co(Ni,Cu)_(28)Al_(12)大块非晶合金的原子结构和电子结构。27 Al各向同性位移的大小和演化表明,过渡金属3d子带填充后费米能级向最小值移动,为Pd杂化成键机制提供了实验证据,Co L23边以及Al L23边和K边附近的预峰的观察进一步支持了这一结论.这项研究提供了深入了解的粘结机制,在MG,这是相关的了解他们的力学行为。
The atomic and electronic structures of transition metal-metalloid based Zr60Co(Ni,Cu)28Al12 bulk metallic glasses (MGs) are probed by 27Al nuclear magnetic resonance (NMR) spectroscopy. The magnitude and evolution of 27Al isotropic shifts indicate that the Fermi level moves toward a minimum upon transition metal 3d sub-band filling and provides experimental evidence for pd hybridization bonding mechanism, which is further supported by the observation of Co L23 edges, and the prepeaks near Al L23 and K edges in electron energy loss spectroscopy. This investigation provides insight into the bonding mechanisms in MGs, which are relevant for understanding of their mechanical behaviors.
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