Technetium Waste Form Development Progress Report

摘要: Analytical electron microscopy using SEM and TEM has been used to analyze a ~5 g. ingot with composition 71.3 wt% 316SS-5.3 Zr-13.2 Mo-4.0 Rh-6.2 Re prepared at the Idaho National Laboratory. Four phase fields have identified two of which are lamellar eutectics, fifth possibly present. A Zr rich was found distributed as fine precipitate, ~10µm in diameter, often coating large cavities. Mo-Fe-Re-Cr eutectic field appears blocky regions ~30µm surrounded by Fe-Mo-Cr field, that turn is Zr-Fe-Rh-Mo-Ni field. The separation reactions different. result austenitic steel forming lower volume fraction within an Mo-Fe-Re intermetallic phase, whereas may be same ferritic phase. Cavitation arisen either bubbles, or from loss equiaxed particles during specimen preparation.