The present paper reports results from the study of
morphology, phase composition, and microstructure of
Pd−Ag alloy powder obtained by potentiostatic pulsating electrolysis.
Several independent physical methods
(electron microscopy, X-ray diffraction and electronographic probe
analysis) were applied. It was found that
the powder contained two basic types of particles: the first one,
enriched in Pd (Ag/Pd ratio less than 1) were
of a dendritic form, monocrystal cubic structure and smaller average
particle size (0.1−0.6 μm); the second
type of particles, enriched in Ag (Ag/Pd ratio greater than 2), were of
a nearly isometric form, polycrystal
structure of cubic silver and greater average particle size (0.6−1.5
μm). It was shown that Pd−Ag alloy
powder consisted of two types of solid solutions of Pd and of
Ag.
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