Abstract
AgCuCd alloy from the pseudobinary eutectic composition range is either rapidly quenched from the melt using the melt spinning technique, or mechanically alloyed in a planetary ball mill. Structure studies performed by means of X-ray diffraction, scanning and transmission electron microscopy demonstrate that the rapidly quenched ribbons consist of α(Cu) with 90% Cu (all compositions in wt%) and B2 ordered β(Ag, Cd) phase (45% of Ag and 45% of Cd); the latter phase is partially transformed to martensite. Powders of pure elements are mechanically alloyed for 16 h in the planetary mill. They show nonuniform composition and consist of α(Cu), α(Ag), Cu 2 Cd, and Cd 3 Ag. The crystallite size within powder particles is estimated from X-ray and transmission electron microscopy studies in the range of 10 to 30 nm. The crystallite size in thin foils prepared using ion beam thinning is larger than in that sectioned using microtome, most probably due to recrystallization during sample preparation. Microanalysis of individual powder particles performed in both, transmission and reflection modes, allows to identify large segregation of elements after this time of milling.
Published Version
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