Investigations of ternary alloys using perturbed angular correlations
MetadataShow full item record
The intended goal of this research was to investigate interactions between solute atoms in intermetallics using a nuclear probe method, Perturbed Angular Correlation (PAC) of gamma rays. The PAC probe, radioactive 111In, acted as one solute in a very dilute concentrations while other solute elements were added at about 1 at.%. Samples were made by arc melting all constituents. The expectation was that signals would be observed that would indicate more-or-less random solution of the added solute and also help to identify its preferred site. The desired state of a binary alloy plus dissolved solute was achieved in only one case out of the ~30 trials attempted for Ir solutes in Ni2In3. In the other cases, evidence suggested the following alternative outcomes: (1) non-reaction of the solute element with either of the main constituent elements, or (2) reaction of the solute element with one of the main constituent elements to produce an undesired binary compound. A more sophisticated approach needs to be taken to identify suitable systems for future study. In the course of the measurements, observations were made of quadrupole interaction frequencies in FeSn, and of 111In segregation among phases in mixed-phase systems.