The palladium-platinum phase diagram

The palladium-platinum equilibrium phase diagram was determined using a “spot” technique. The two metals form a series of solid solutions over the entire composition range, which solid solutions coexist with their liquid solutions. The experimentally observed gap between the solidus and the liquidus was comparable to that calculated employing a regular solution model. The phase boundaries delineated in the present work, however, differ significantly from those in an earlier work which were obtained by the Pirani method.