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- W2089707978 abstract "The radiation damage produced at 21 K by 2.5 MeV electrons, and the subsequent recovery have been investigated for intermetallic compounds (50 - 54.5 at.% Al) by means of residual electrical resistivity measurements, with particular emphasis on the effects of the composition and fluence. The resistivity damage rate was much higher for the alloys than for a simultaneously irradiated nickel reference sample. Disordering contributes only a small fraction (8 - 15%) to the resistivity damage. The analysis of the dominant defect contribution led to Frenkel-pair resistivity values of , larger than those for pure Al or Ti, and nearly independent of the composition. The recovery of the damage was characterized by two main stages. The temperature of the first one is independent of the composition: it was assigned to close-pair recombination, and to the migration and annihilation of self-interstitials. The second main one (, for the stoichiometric compound) has a temperature which depends on the fluence and on the composition. It corresponds to the migration and elimination of vacancies. An activation enthalpy of was estimated for this stage for stoichiometric TiAl. Its shift to higher temperatures with increasing aluminium content indicates a reduction in the vacancy mobility." @default.
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- W2089707978 date "1997-06-30" @default.
- W2089707978 modified "2023-09-25" @default.
- W2089707978 title "Radiation-induced defects in electron-irradiated compounds: the effect of composition" @default.
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- W2089707978 doi "https://doi.org/10.1088/0953-8984/9/26/003" @default.
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