U.S.-China Cooperative Research: Electron Microscopy and Modelling Studies of Rapidly Solidified Metals Exhibiting Icosahedral Point Symmetry

在这项由弗吉尼亚大学夏洛茨维尔分校的S.J.Poon博士和Gary Shiflet博士以及中国科学院沈阳金属研究所的K.H.Kuo和张泽博士共同开展的研究项目中，我们将研究快速凝固金属合金中准晶相的结构和动力学性质。两种已知形成金属玻璃的合金将被用作详细研究的模型系统。在快速凝固金属合金中发现了一类新的有序结构，称为二十面体相，这引起了人们对确定这些新相的原子尺度构型和长程有序性的浓厚兴趣和研究努力。这个项目将试图使某些结构模型的预测与在实验期间获得的电子和X射线衍射图相一致。希望这一合作努力将有助于理解这种新型材料的成形性、稳定性和结构。

In this cooperative research project between Dr. S.J. Poon and Dr. Gary Shiflet, University of Virginia, Charlottesville, and Dr. K.H. Kuo and Zhang Ze, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, China, the structural and kinetic properties of quasicrystalline phases in rapidly solidified metallic alloys will be investigated. Two alloys which are known to form metallic glasses will be used as model systems for detailed studies. The discovery of a new class of ordered structures, known as icosahedral phases, in rapidly solidified metallic alloys has generated active interest and research efforts to determine the atomic-scale configuration and long range order of these new phases. This project will attempt to reconcile predictions of certain structural models with electron and x-ray diffraction patterns obtained during the experiment. It is hoped that this cooperative effort will contribute to the understanding of the formability, stability, and structure of the novel class of materials.