Macrokinetics of Solid-Phase Synthesis of an Activated 3Ni + Al Mixture in the Thermal Explosion Mode |
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Authors: | V Yu Filimonov M A Korchagin E V Smirnov N Z Lyakhov |
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Affiliation: | 1.Polzunov Altai State Technical University,Barnaul,Russia;2.Institute of Solid State Chemistry and Mechanochemistry Siberian Division,Russian Academy of Sciences,Novosibirsk,Russia |
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Abstract: | Specific features of heating of a mechanically activated 3Ni + Al mixture during synthesis in the thermal explosion mode are
considered. Based on the authors’ criterion of the minimum curvature of the heating rate logarithm as a function of inverse
temperature, the activation energies of the synthesis process in the above-mentioned system are determined and the temperature
intervals of the Arrhenius dependence and self-deceleration segments on thermograms are found. A kinetic function structure
analysis shows that synthesis follows the laws of homogeneous kinetics with the reaction order close to unity. The calculated
activation energies are anomalously low, as compared with conventional self-propagating high-temperature synthesis in this
system. |
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