Biography
Prof. M. H. Enayati
Prof. M. H. Enayati
Isfahan University of Technology, Iran
Title: Nanostructured Materials by Mechanical Deformation Methods
Abstract: 
Vapour deposition, plasma processing, gas-condensation, chemical precipitation and crystallisation from the amorphous phase are well established processing routes for obtaining nanocrystalline materials. However, it is well known that mechanical deformation, as a top-down solid-state synthesis route, can also be applied for production of a nanocrystalline structure. Comparison of different preparation methods in terms of cost and productivity demonstrates that mechanical deformation is the most cost effective route capable of producing nanocrystalline materials in large quantity. Grain refinement to the nanometre size is governed by the plastic deformation induced during mechanical working. In general, the grain/crystallite size decreases continuously with number of deformation cycles until a minimum (saturation) size is approached. Further refinement seems to be difficult to achieve for a fixed set of experimental conditions. In this paper the most relevant features of different techniques for producing nanocrystalline materials based of mechanical deformation are overviewed and discussed.