Composition Control of Palladium-Sliver Alloy for Optical Fiber Hydrogen Sensor
The present work investigates diffusivity of hydrogen (H) in palladium-silver (Pd/Ag) over 300～1100K temperature range for Pd100-xAgx, X=0%～40% by using the Sievert Law. The silver in the Pd/Ag alloy has significantly higher diffusion as compared to pure Pd for hydrogen sensor, the addition of Ag reduces the critical temperature of α→Β phase transformations and also increases the solubility of H, and provides longer operational lifetime for hydrogen sensor. It was found that the diffusion coefficient of H in Pd/Ag alloy decreases with increasing Ag and with increasing temperature, the calculated diffusion coefficient of H in the Pd/Ag alloys were found to have a maximum at 24%～25% Ag.
L. J. Cui et al., "Composition Control of Palladium-Sliver Alloy for Optical Fiber Hydrogen Sensor", Advanced Materials Research, Vols. 317-319, pp. 1045-1049, 2011