Strain Gradient Influence on Diffusion Coefficients of Deuterium in Absorption and Desorption of Deuterium in Pd81Pt19 Membrane

Abstract

The diffusion of deuterium through a Pd81Pt19 membrane was investigated. At six temperatures in the range 278.2-328.2 K the diffusion coefficients were determined by breakthrough method for the membrane with no initial content of deuterium. The determined activation energy of diffusion of deuterium equals E = 26.4 kJ/mol. The solubility of deuterium in Pd81Pt19 alloy at 278.2 K was measured by volumetric method. The influence of self-stresses on diffusion of deuterium was investigated by determination of diffusion coefficients for the Pd81Pt19 membrane with different initial contents of deuterium at 278.2 K.