Radiation tolerance of M n +1AX n phases, Ti3AlC2 and Ti3SiC2

During investigations of novel material types with uses in future nuclear technologies (ITER/DEMO and GenIV fission reactors), ternary carbides with compositions Ti3AlC2 and Ti3SiC2 have been irradiated with high Xe fluences, 6.25A-1015 ionscma degree 2 (a arrow right 425-30dpa), using the IVEM-TAND...

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Bibliographic Details
Published in:Acta materialia 2010-08, Vol.58 (13), p.4362-4368
Main Authors: Whittle, K R, Blackford, M G, Aughterson, R D, Moricca, S, Lumpkin, G R, Riley, D P, Zaluzec, N J
Format: Article
Language:English
Subjects:
Activation
Argon
Bonding
Carbides
Crystal structure
Indication
Phases
Radiation tolerance
Tolerances
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Summary:During investigations of novel material types with uses in future nuclear technologies (ITER/DEMO and GenIV fission reactors), ternary carbides with compositions Ti3AlC2 and Ti3SiC2 have been irradiated with high Xe fluences, 6.25A-1015 ionscma degree 2 (a arrow right 425-30dpa), using the IVEM-TANDEM facility at Argonne National Laboratory. Both compositions show high tolerance to damage, and give indications that they are likely to remain crystalline to much higher fluences. There is a visible difference in tolerance between Ti3AlC2 and Ti3SiC2 that can be related to the changes in bonding within each material. These initial findings provide evidence for a novel class of materials (+200 compounds) with high radiation resistance, while, significantly, both of these materials are composed of low-Z elements and hence exhibit no long-term activation.
ISSN:1359-6454
DOI:10.1016/j.actamat.2010.04.029