Nanostructured materials: basic concepts and microstructure☆

A review of the electrochemical performance of alloy anodes for lithium-ion batteries

http://nanomechanics.mit.edu/sites/default/files/documents/Kumar_03.pdf

Mechanical behavior of nanocrystalline metals and alloys

Dynamic and post-dynamic recrystallization under hot, cold and severe plastic deformation conditions

Principle of equal-channel angular pressing for the processing of ultra-fine grained materials

Nanocrystalline materials an approach to a novel solid structure with gas-like disorder?

Recently, nanometer-sized crystalline materials have been proposed to represent a new solid-state structure which exhibits neither long-range order (like crystals) nor short-range order (like glasses). It was the purpose of this study to test this idea by x-ray diffraction experiments. Nanometer-sized crystalline materials are polycrystals in which the size of the crystallites is a few (1--10) nanometers. Structurally, these materials consist of the following two components, the volume fraction of which is about 50% each: a crystalline component, formed by all atoms located in the lattice of the crystallites, and an interfacial component comprising the atoms situated in the interfaces. It is this interfacial component which was proposed to exhibit an atomic arrangement without short- or long-range order. In order to test this idea, the interference function of nanometer-sized crystalline iron (6-nm crystal size) was measured by x-ray diffraction. The measured interference function was compared with the interference function computed by assuming the interfacial component to be short-range ordered or to consist of randomly displaced atoms (no short- or long-range order). It was found that the experimental interference function can only be matched by the computed one if the interfacial component is assumed to have no short- or long-range order.

X-ray diffraction studies of the structure of nanometer-sized crystalline materials

Diffusion in nanocrystalline material

Nanocrystalline materials, which have been proposed to represent a new solid state structure, are investigated by Mossbauer spectroscopy. Nanocrystalline materials are polycrystals with a crystal size of typically 1–10 nm. These materials consist of two components of comparable volume fractions: a crystalline component and an interfacial component, formed by the atoms located either in the crystals or in the interfacial regions between them. As the atomic configurations of both components are different, two kinds of Mossbauer spectra are expected. Iron nanocrystalline material is found to exhibit a two‐component Mossbauer spectrum, consisting of a crystalline component and a second one with different Mossbauer parameters. The Mossbauer parameters of the second subspectrum are consistent with the model of the interfacial component of a nanocrystalline material.

H. Gleiter

Papers

Nanocrystalline materials an approach to a novel solid structure with gas-like disorder?

X-ray diffraction studies of the structure of nanometer-sized crystalline materials

Diffusion in nanocrystalline material

Investigation of nanocrystalline iron materials by Mössbauer spectroscopy

Investigation of low energy grain boundaries in metals by a sintering technique