The work deals with possibilities of mechanical activation (MA) and mechanochemical methods for preparation of nanocomposite materials Me/X (Me=Al, Mg, Ti, etc; X= MoO₃, Teflon, C, BN, etc.) with high reactivity. Materials of such types are prospective as energetic and pyrotechnic materials, materials for hydrogen storage and generation of hydrogen, etc. Some methods of preparation have been developed, a defective structure, emerging upon mechanical treatment, and the stage mechanism of nanocomposite formation have been investigated. Considerable attention was paid to the structure and reactivity of “mechanochemical” nanocomposites. The structure of Nano Composites was investigated by TEM, SEM, AFM, XRD and other methods. The reactivity was checked in the three types of reactions: 1) The interaction of “external” gaseous and liquid reagents with nano dimension metals (Al+O₂, Al+N₂, Ti+H₂, Al+H₂OàH₂, etc.); 2) Shock wave initiated interaction in MA energetic composites (Al+Teflon, Mg+Teflon, Al+MoO₃, Mg+MoO₃); 3) The heating-initiated interaction between components of MA nanocomposites (Al+MoO₃, Mg+MoO₃,  Al+C, Al+BN).  The acceleration of transformations under the mechanical activation was observed. Thus, for example, mechanical activation results in decreasing the temperature of Al oxidation by 400°C, in increasing the rate of combustion of energetic composites for more than two orders of magnitude, and the lowering of the temperature of aluminum carbide synthesis by 800 °C, etc. For systems involving Teflon it was possible to realize the detonation-like regime of chemical transformation. The contribution of different physical factors causing the acceleration of transformations after mechanical activation was analyzed. 

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/15745 must be provided.