Paper Title:
Mechanical Activation as a New Method for SHS
  Abstract

The use of mechanical activation (the elemental powder mixture is milled for a short time at given frequency and impact energy) as a precursor to self-propagating high-temperature synthesis (SHS) results in the formation of nanostructured porous materials. The mechanical activation step was found necessary (i) to modify the thermal parameters of the combustion front (i.e. combustion front velocity, thermal heating rate…) in the cases of Mo-Si, Fe-Al, Ni-Si (ii) to initiate a combustion front in the case of systems having a low exothermicity. Nevertheless, the control of the mechanically activated mixture characteristics and, the understanding of the mechanical activation role on the SHS parameters are essential to produce end-products with expected microstructure.

  Info
Periodical
Edited by
P. VINCENZINI
Pages
979-988
DOI
10.4028/www.scientific.net/AST.45.979
Citation
F. Bernard, S. Paris, E. Gaffet, "Mechanical Activation as a New Method for SHS ", Advances in Science and Technology, Vol. 45, pp. 979-988, 2006
Online since
October 2006
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