ATOM-PROBE FIELD-ION MICROSCOPY OF MICRO-CLUSTERS IN AN Ni4Mo ALLOYReport as inadecuate




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Abstract : Field evaporation of micro-clusters in a Ni4Mo alloy was studied. When field evaporation was carried out in vacuum, sporadic field evaporation of the surface atoms was frequently observed and the atom-probe analysis resulted in the higher Mo concentration for micro-clusters. We have found that this apparently erroneous composition was caused by simultaneous arrival of more than one ion of the same isotope species at the detector. The appropriate experimental conditions to obtain stoichiometrically correct values of the composition for micro-clusters were then discussed.





Author: T. Hashizume M. Yamamoto T. Sakurai

Source: https://hal.archives-ouvertes.fr/



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