Abstract
The paper states the results of calorimetric studies of thermal dissociation of titanium, zirconium, magnesium, and palladium hydrides performed in the recent years, and also demonstrates the multiplet character of thermal dissociation, which is specific to all these hydrides. Moreover, the paper shows good correlation between the course of curves of the differential scanning calorimetry and results of thermogravitation measurements. In addition, the paper establishes the discrete nature of decomposition processes, and proposes the sequence of mechanisms that occur upon heating of transition metals dihydrides in the medium with low partial pressure of hydrogen: reconstruction in a hydride phase; destruction of metal-hydrogen bonds with the formation of supersaturated by hydrogen solid solution; diffusion of hydrogen to the solid phase-environment interface; hydrogen molization at hydrogen output from the solid phase.
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