Search for radiation-induced electrical degradation in alumina during spallation-neutron irradiation

Autor:	E.H. Farnum, Tatsuo Shikama, Walter F. Sommer, Frank W. Clinard, J.C. Kennedy
Rok vydání:	1994
Předmět:	Nuclear and High Energy Physics Chemistry Conductivity Fluence Radiation effect Nuclear Energy and Engineering Neutron flux Radiation damage Neutron source General Materials Science Spallation Irradiation Composite material Nuclear chemistry
Zdroj:	Journal of Nuclear Materials. :1128-1132
ISSN:	0022-3115
DOI:	10.1016/0022-3115(94)91008-1
Popis:	dc and ac electrical conductivity of alumina and sapphire were measured during irradiation with spallation neutrons at the Los Alamos Spallation Radiation Effects Facility to a fluence of about 0.02 dpa. Both ac and dc voltages were applied during irradiation at 395, 615 and 655° C in an attempt to measure radiation-induced electrical degradation (RIED). RIED-like effects were observed in the evacuated AC capsules, but no RIED was observed with the dc capsules in about 1 atm of argon gas. The dc measurements showed an initial high increase in conductivity followed by a continual decrease with increasing fluence. We believe that postirradiation conductivity measurements must be made to confirm the observed current increases in the ac capsules.
Databáze:	OpenAIRE
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