Microstructure of RERTR DU-alloys irradiated with krypton ions up to 100 dpa

作者：Gan J; Keiser D D Jr^*; Miller B D; Wachs D M; Allen T R; Kirk M; Rest J

来源：Journal of Nuclear Materials, 2011, 411(1-3): 174-180.

DOI：10.1016/j.jnucmat.2011.01.121

The radiation stability of the interaction product formed at the fuel-matrix interface of research reactor dispersion fuels, under fission-product bombardment, has a strong impact on fuel performance. Three depleted uranium alloys were cast that consisted of the following five phases to be investigated: U(Si, Al)(3), (U, Mo)(Si, Al)(3), UMo(2)Al(20), U(6)Mo(4)Al(43), and UAl(4). Irradiation of transmission electron microscopy (TEM) disc samples with 500-key Kr ions at 200 degrees C to doses up to similar to 100 displacements per atom (dpa) were conducted using a 300-key electron microscope equipped with an ion accelerator. TEM results show that the U(Si, Al)(3) and UAl(4) phases remain crystalline at 100 dpa without forming voids. The (U, Mo)(Si, Al)(3) and UMo(2)Al(20) phases become amorphous at 1 and 2 dpa, respectively, and show no evidence of voids at 100 dpa. The U(6)Mo(4)Al(43) phase goes to amorphous at less than 1 and similar to 2 dpa and reveals high density voids at 100 dpa.

• 出版日期2011-4