Abstract

The behavior of a coherent metal-hydrogen system quenched into the unstable two-phase region is examined. A stochastic theory including thermal fluctuations describes the coupling of the density modes to the environment. We conclude that the thermal fluctuations could be the dominant mechanism inducing the spinodal decomposition. In order to stimulate further studies, we give specific results for a niobium-hydrogen solution. The role of point defects in spoiling the effect of the incoherent thermal fluctuations is also analyzed.

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