Abstracts and Available Papers Presented at the 2005 International RERTR Meeting
EFFECT OF
ADDITIVES ON THE Al DIFFUSION BEHAVIOR IN UMo BASED
FUELS
Jorge E. Garcés
Centro Atómico Bariloche, CNEA, 8400 Bariloche,
Argentina
Guillermo Bozzolo
Ohio Aerospace Institute, 22800 Cedar Point Rd.,
Cleveland, OH 44142, USA
Gerard Hofman and
Jeffrey Rest
Argonne National Laboratory, 9700 S. Cass Ave., Argonne,
IL 60439, USA
ABSTRACT
In this work we apply an atomistic modeling tool for
dealing with interfacial phenomena and the effects of
selected additives in the behavior of the Al/UMo
interface. The basic features characterizing the real
system are identified in this modeling effort such as:
the increased Al and U interdiffusion with temperature,
the Al stopping power of increasing Mo concentration,
and the formation of interfacial compounds. Moreover,
significant results were also obtained in the case of Si
additions to Al, once again reproducing the main
features observed experimentally: the trend indicating
formation of interfacial compounds, much reduced
diffusion of Al into UMo due to the high Si
concentration, Si depletion in the Al matrix, and an
unexpected interaction between Mo and Si which avoid the
Si diffusion to deeper layers in the UMo solid solution
thus improving the stopping power for Al diffusion. The
effects of other additives, such as Ge, are also
discussed in the present work.
Contact: Dr. Jordi Roglans-Ribas
Technical Director, RERTR Department
Nuclear Engineering Division – 362
Argonne National Laboratory
9700 South Cass Avenue
Argonne, IL 60439
Fax: +1 630-252-5161
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