Solid Solubility in Cu₅Gd_1−xCa_x System: Structure, Stability, and Hydrogenation

Figure 3

(a) Cross section image in STEM mode of a Cu₅Gd_0.5Ca_0.5 melt-spun ribbon showing that the matrix grains have hexagonal symmetry (SAED). Also, a negligible amount of secondary Cu-Ca phase was found; (b) EDS line scan (14 points) confirmed stoichiometric, that is, nominal, composition of the matrix phase, low oxygen level, and segregation of Cu-Ca phase.

(a)

(b)