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Development of in-situ technology for producing nanostructural materials by intensive shear deformation under high pressure.

Bilousov Mykola 

National Academy of Sciences of Ukraine, A.Galkin Donetsk Institute for Physics & Technology (DonPTI NASU), Roza Luxemburg 72, Donetsk 83114, Ukraine


The development of in-situ technology for formation submicro- and nanocrystalline structures by intensive shear deformation under high pressure is a necessary conditions for producing nanomaterials with the given properties. The idea of in-situ technology consists in simultaneous registration of internal properties of samples, external deformating parameters and corresponding cubmicrostructural changing with following establishing of connection between them.
The results of researches Cu, Al, Fe (solids and powders) have shown, that the curve of dependence of stress of compression from shear deformation had stage character, it is marked as: a) a stage of elastic behaviour; b) a stage of intensive plastic deformation with fragmentation of elements of structure (structural - kinetic changes); c) a stage of structural hardening and secondary elastic behaviour.
Parameters of a crystal lattice monotonously decreased with growth of a compressing pressure. Width and intensity of X-ray lines unmonotonicaly changed, that correlates with the beginning of fragmentation of elements of structure, that are confirmed by unmonotonous changing of temperature, electroresistance and increassing of intensity of acoustic issue. At a pressure more then 20GPa considerably has increased diffusing dispersion. The quantitative processing X-ray diffraction peak by profile analysis using the Multiple Whole Profile Fitting Method has shown presence of nanodimentional elements- 80-200 nm. The formation of elements with nanostructures was facilitated at additional imposing shear components. Is shown, that the proceed of intensive shear plastic deformation under high pressure at a stage of fragmentation.


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Presentation: poster at E-MRS Fall Meeting 2003, Symposium G, by Bilousov Mykola
See On-line Journal of E-MRS Fall Meeting 2003

Submitted: 2003-05-23 08:53
Revised:   2009-06-08 12:55