Palladium composite membranes characteristics

McCool B, Xomeritakis G, Lin YS (1999) Composition control and hydrogen permeation characteristics of sputter deposited palladium-silver membranes. J Membr Sci 161 67-76... 

Thus, changes in the phase composition of a membrane as a result of its operation may substantially alter local mechanical characteristics, a process that should be taken into account and controlled when analyzing experiments in which intense flows of hydrogen pass through a palladium membrane. The model also makes it possible to relate independent experimental data on equilibrium, transport, and mechanical properties of palladium membranes. The estimates obtained are in close agreement with a large numbers of experimental data [200-202] on the behavior of various characteristics of palladium membranes with different prehistories and under different condition of hydrogen transport. 

Palladium.60 One of the unique characteristics of metallic palladium and Pd-Ag or Pd-Au alloys is the high rate of diffusion of hydrogen gas through a metal membrane compared to the rates for other metals such as nickel or iridium. There is no doubt that pressure-temperature-composition curves indicate the presence of palladium hydride phases. 

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