Cluster Assembled Nanophase Metals Using NMR

9308168适合这项工作解决原子和电子结构的基本问题，以及团簇组装纳米相金属的变形机制。核磁共振(核磁共振)技术将应用于通过小团簇固结制备的金属样品。这些纳米相样品的颗粒尺寸只有几个纳米，比颗粒更大的相同材料的强度高达5倍。原子尺度对核磁共振响应的影响和核磁共振测量的位置选择性将为这些材料的结构提供一个新的和独特的观点。核磁共振工作是在阿贡国家实验室进行样品准备的同时进行的。核磁共振(核磁共振)提供有关单个原子所看到的材料的结构和电子性质的信息。由非常小的晶体颗粒(直径10到30个原子)固结而成的金属，被称为纳米相金属，与自然产生的材料相比，机械性能有了显著的提高。这项工作将应用核磁共振技术，从原子的角度帮助理解增强的机械性能。这将有助于开发新材料和这些材料的新用途。核磁共振工作是在阿贡国家实验室进行样品准备的同时进行的。***

9308168 Suits This work addresses fundamental issues of atomic and electronic structure and the deformation mechanism in cluster-assembled nanophase metals. Nuclear magnetic resonance (nmr) techniques will be applied to metallic samples prepared by consolidation of small clusters. These nanophase samples will have a grain size of a few nanometers and can be up to five times stronger than the same material with a larger grain size. The atomic scale effect on the nmr response and the site-selective nature of the nmr measurements will provide a new and unique view of the structure of these materials. The NMR work is performed in conjunction with sample preparation performed at Argonne National Laboratory. %%% Nuclear Magnetic resonance (NMR) provides information on the structural and electronic properties of materials as seen by individual atoms. Metals produced by consolidation of very small crystalline particles (10 to 30 atoms across), referred to as nanophase metals, have significantly enhanced mechanical properties compared to the naturally occuring material. This work will apply techniques of NMR to help understand the enhanced mechanical properties from an atomic viewpoint. This will aid in the development of new materials and new uses for these materials. The NMR work is performed in conjunction with sample preparation performed at Argonne National Laboratory. ***