Effect of Mechanical Alloying of Magnesium with Inorganic Salts on Its Reactivity in Relation to Hydrogen
I. G. KONSTANCHUK1, E. YU. IVANOV2 and V. V. BOLDYREV1
1Institute of Solid State Chemistry and Mechanochemistry,
Siberian Branch of the Russian Academy of Sciences, Ul. Kutateladze 18, Novosibirsk 630128 (Russia) E-mail: irina@solid.nsk.su
2Tosoh SMD, Inc., 36000 Gantz Road, Grove City, Ohio (USA)
Pages: 243-247
Abstract
Effect of inorganic salts NaF, NaCl, MgF2, CrCl3, and (NH4)2CO3 additives on the processes of hydrogenation and dehydrogenation of magnesium mechanical alloys has been studied. It has been demonstrated that mechanical alloying of magnesium with a series of inorganic salts not only facilitates the grinding of metal, but also modifies its surface that leads to an acceleration of hydrogenation and dehydrogenation reactions and to rather high hydrogen content of samples (up to 5.5-6 mass % with the use of NaF, NaCl, or CrCl3). It has been found that salts modify differentially the metal surface that is reflected in the kinetic curves, especially, during the first hydrogenation cycle.
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