Vibration spectra are conventionally applied in studying properties of materials at different hierarchic levels. At microlevel, an example of such an application is analysis of vibration parameters of the material lattice. At macrolevel, vibrations of the material sample are used as a unified system. Naturally, in each of the above cases the vibrations occur at characteristic frequencies in significantly separated parts of spectra and carry completely different information on the material or items produced form this material.

At present materials with certain specified properties have found wide application. Creating an adequate complex inner structure of material when other levels may exist between the micro- and the macrolevels often forms these properties. The more complex material structure is, the larger number of parameters is required to describe the state of this material. The presence of developed mesostructure increases the volume of information necessary to represent the state of the material and makes the procedure of data securing from vibration spectra more complex.

The sensitivity of different parts in a vibration spectrum to the properties of the material with a larger number of hierarchic levels has been analyzed within the framework of known model approaches. The conditions and recommendations that allow the acquisition of information on the material properties at different hierarchic levels have been developed. The results of the theoretical analysis have been supported by experimental studies on the multiphase heterogeneous materials that are distinct by their composition, structure and properties and produced by the methods of powder metallurgy, namely, powder and fiber materials and their composites, ceramics, high-porous-cellular materials.

1. PRESENTATION: Opportunities in Studying Materials with Developed Mesostructure using Vibration Spectra, Microsoft Office Document, 0MB

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