1966 Volume 21 Issue 12 Pages 2633-2637
Gold-palladium alloys, ranging around AuPd3 in composition, were studied by electron diffraction using evaporated single crystal films, and a superlattice AuPd3 was found. The temperature of order-disorder transformation was estimated at about 780°C for the alloy with a composition of about 80 at. % palladium. The electron diffraction pattern of the ordered alloy AuPd3 showed that the intensities of the superlattice reflections were extremely weak, though they were sharp. The results mean that the degree of order is of a very reduced value. This special nature of the ordered alloy AuPd3 is discussed by comparing to other ordered alloys of the noble metal-palladium systems.
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