Share Email Print
cover

Proceedings Paper

Modeling the kinetics of non-isothermal heterogeneous interaction during combustion synthesis of advanced micro- and nanocrystalline materials
Author(s): Boris B. Khina
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The combustion synthesis (CS), or self-propagating high-temperature synthesis (SHS) is a cost and energy efficient route for producing a wide range of refractory compounds (carbides, silicides, intermetallics) and advanced micro- and nanocrystalline materials. However, despite 40 years of extensive studies and industrial applications, intricate phase formation mechanisms that operate during CS are still not well understood. This hinders the development of novel materials and SHS-based technologies. An answer to the most urgent question in this area, viz. "why in CS the interaction accomplishes in a short time, ~0.1-1 s, while the traditional furnace synthesis of the same material takes several hours for the same starting composition, particle size and final temperature," can be found only through mathematical modeling. In this work, the results of mathematical modeling of the interaction kinetics in condensed systems in non-isothermal conditions typical of CS are reported. Calculations were performed using the experimental data on SHS and diffusion parameters for the product phases on the example of TiC and NiAl. The maps of phase formation mechanisms that operate during CS are constructed. The uncommon, non-equilibrium interaction pathways, which were observed experimentally and debated in literature, are confirmed theoretically ex contrario.

Paper Details

Date Published: 17 June 2009
PDF: 7 pages
Proc. SPIE 7377, Twelfth International Workshop on Nanodesign Technology and Computer Simulations, 73770N (17 June 2009); doi: 10.1117/12.836971
Show Author Affiliations
Boris B. Khina, Physico-Technical Institute (Belarus)


Published in SPIE Proceedings Vol. 7377:
Twelfth International Workshop on Nanodesign Technology and Computer Simulations
Alexander I. Melker; Vladislav V. Nelayev, Editor(s)

© SPIE. Terms of Use
Back to Top