%0 Journal Article
%T Ni和Y影响Al-Ni-Y金属玻璃形成能力的本征机理
%A 蒋东阳
%A 吴念初
%A 连景宝
%A 王蕤
%A 杨雪峰
%J 材料科学与工业
%D 2018
%R 10.11951/j.issn.1005-0299.20170362
%X 为了揭示Ni和Y元素对Al-Ni-Y三元金属玻璃的玻璃形成能力影响的本征机理，且基于费米面和伪布里渊区理论，提出了Ni和Y元素对Al-Ni-Y三元金属玻璃的玻璃形成能力的影响分为两种情况：Ni原子通过Al和Ni原子之间的电子轨道杂化效应，改变费米面直径(2KF)，从而影响Al基金属玻璃的玻璃形成能力；Y原子通过整体原子的静态结构，改变伪布里渊区(KP)，最终影响Al基金属玻璃的玻璃形成能力.费米面和伪布里渊区尺寸通过电子能量损失谱(EELS)、X射线衍射(XRD)和X射线光电子能谱(XPS)获得.研究表明，当两者相互作用机制满足2KF=KP条件时，费米能级处电子态密度最低，金属玻璃整体结构的稳定性达到最佳.在此基础上，提出了δ=|KP-2KF|判据用于衡量Al-Ni-Y三元金属玻璃的玻璃形成能力，该判据在实验上得到验证.</br>In order to reveal the effect of Ni and Y on the glass forming ability (GFA) of Al-Ni-Y ternary alloy system, two conclusions are drawn based on the Fermi sphere-Brillouin zone interaction and spectroscopy experiments: firste the effect of Ni is influenced by the electron hybridization between Al atom and Ni atom, changing the diameter of the Fermi sphere (2KF); second the effect of Y element mainly changes the diameter of the pseudo-Brillouin zone (KP). Their effects on the Fermi level and Brillouin zone size were obtained by the EELS (electron energy-loss spectra), XPS (x-ray photoelectron spectroscopy) and XRD (x-ray diffraction). Research results showed that the static structure changes of Al atoms and Y atoms influenced the diameter of the pseudo-Brillouin zone. The best GFA could be obtained when the Fermi surfaces nearly touched the quasi-Brillouin boundaries. On this basis, the δ=|KP-2KF| criterion was proposed to evaluate the GFA of Al-Ni-Y ternary alloy. This criterion was confirmed by the experimental results.
%K Al基金属玻璃
%K 玻璃形成能力
%K 电子结构
%K 伪布里渊区
%K 费米面&lt
%K /br&gt
%K Al-based
%K metallic
%K glasses
%K glass
%K forming
%K ability
%K electronic
%K structure
%K pseudo-Brillouin
%K zone
%K fermi
%K sphere
%U http://hit.alljournals.cn/mst_cn/ch/reader/view_abstract.aspx?file_no=20180401&flag=1