Local Atomic Structure of Non-Crystalline Solids

这一提议涉及到准晶和金属玻璃的结构性质的研究，可以形成准晶结构的退火。准晶形成的条件将通过分析在非晶状态下发生的结构松弛和随后向准晶状态的转变来确定。应用的实验技术包括微分异常x射线散射、中子散射、能量色散x射线和同步辐射衍射。本文将研究几种具有准晶结构形成倾向的金属玻璃合金体系。Egami博士有着出色的研究记录，宾夕法尼亚大学的设施非常适合执行拟议的项目。这项研究以前由美国国家科学基金会资助DMR-8318816。

This proposal involves research on the nature of the structure of quasicrystals and metallic glasses that can form quasicrystalline structures upon annealing. Conditions for formation of quasicrytals will be ascertained from analysis of structural relaxation occurring in the amorphous state and subsequent transformation into the quasicrystalline state. Experimental techniques to be applied include differential anomalous X-ray scattering, neutron scattering, energy dispersive X-ray and synchrotron radiation diffraction. Several metallic glass alloy systems will be studied that show tendencies toward possible quasicrystalline structure formation. Dr. Egami has an outstanding research record and the facilities at the University of Pennsylvania are excellent for performing the proposed program. This research was previously supported by NSF Grant DMR-8318816.