Films of Ta metal on uranium and of Ir metal on tantalum have been
irradiated and melted by pulses from Q-switched Ruby and frequency-doubled
Nd:YAG lasers to investigate the nature of the resulting mixtures in light
of the very different binary-phase diagrams of the two systems. In addition,
a two-phase Ir-Ta alloy has been surface-processed with CW CO2
-laser radiation and with an electron beam in order to study microstructure
refinement and test the advantage of using alloys as opposed to
film-on-substrate combinations for the developement of claddings.