Preparation of supported Pd/Ag alloy selectively permeated films for fusion fuel purification

Palladium/silver films with Ag content of (27.5 +- 0.3) at.% and a thickness of about 8 microns have been made by pulse and multi-layer plating techniques, the substrate of which is a type of 316 stainless steel filter plate. The annealing condition is determined to prepare a palladium/silver alloy film for hydrogen with a homogeneous composition, stable structure and good sticking performance with the substrate. Its permeability and selectivity to hydrogen are examined under 350 degree C. The permeation rate by area is 9.1 times greater than the commercial PdAg25at.% membrane and the selectivity to H2-He system is up to 500. It could be concluded that the supported Pd/Ag alloy selectively permeated film for hydrogen is suitable to the fuel treatment of fusion-fission hybrid reactor in China