Structural and Phase Changes of Products of the Oxidation and Ageing of Nanodispersed Aluminium upon the Interaction with Water
G. I. VOLKOVA, V. G. IVANOV and O. A. KUKHARENKO
Institute of Metallurgy, Ural Branch of the Russian Academy of Sciences,
Ul. Pervomayskaya 91, Ekaterinburg 620016 (Russia)
E-mail: pat@ipc.tsc.ru
Pages: 325-331
Abstract
Ultradispersed oxyhydroxides of aluminium have been obtained upon the interaction of electroexplosive nanodispersed aluminium with water at 55 oC. Initial samples were subjected to ageing under the alkaline condition (pH 10) at 20 and 50 oC. It has been demonstrated that the content of structural water in resultants of the reaction increases during the course of ageing; the specific surface and the limiting adsorption volume decrease. An increase in the intensity of reflexes of bayerite and a decrease in the intensity of pseudoboehmite lines with time have been noted. The sorption of saturated benzene vapour at 20 oC drops during the ageing of samples. The observed processes occur more intensively at 50 oC. An inference about the transformation pseudoboehmite
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