SWELLING OF UAl$sub 3$--Al COMPACTS.

Dispersion Fuels

“…Little, if any, reaction occurred at 260 °C, but large fractions of the UA1 2 were transformed to UA1 3 during the three hours at the 488-496 °C rolling and blister annealing temperatures. Very little UAI3 was transformed to UA1 4 , consistent with the data reported by Gregg et al (1967). (Miller and Beeston, 1986 The reaction of U 3 Si 2 with Al is very slow below fabrication temperatures for plate-type fuels (485-500 °C).…”

“…The reaction occurs much more rapidly with UA1 2 than with UA1 3 . Studies of the reactions using hot-stage metallography were made by both Thummler et al (1969) and by Gregg et al (1967). The latter found that the UAI3-AI reaction rate accelerates rapidly above 525 °C.…”