Oxygen effects on irradiated tantalum alloys

Ta and Ta–1% W are being considered to be used as target clad materials in the LANSCE proton beam line for the material test station (MTS). To investigate the embrittlement of these materials due to oxygen contamination and proton irradiation, Ta and Ta–1 wt% W (as received and with ∼400 ppm O) were...

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Bibliographic Details
Published in:Journal of nuclear materials 2009-01, Vol.384 (1), p.25-29
Main Authors: Hosemann, P., Maloy, S.A., Greco, R.R., Swadener, J.G., Romero, T.
Format: Article
Language:English
Subjects:
Applied sciences
Controled nuclear fusion plants
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Fission nuclear power plants
Fuels
Installations for energy generation and conversion: thermal and electrical energy
Nuclear fuels
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Summary:Ta and Ta–1% W are being considered to be used as target clad materials in the LANSCE proton beam line for the material test station (MTS). To investigate the embrittlement of these materials due to oxygen contamination and proton irradiation, Ta and Ta–1 wt% W (as received and with ∼400 ppm O) were exposed to a 3.5 MeV proton beam at the ion beam materials laboratory at LANL. After irradiating the samples in the proton beam, nanoindentation was performed in cross-section to investigate the hardness increase of the materials due to irradiation. The nanoindentation showed that the hardness increase due to irradiation is between 9% and 20% depending on the material. The results show good agreement with mechanical testing results on tantalum and Ta–1 wt% W after high energy proton irradiation to doses up to 23 dpa.
ISSN:0022-3115
1873-4820
DOI:10.1016/j.jnucmat.2008.09.027