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- W203419216 abstract "Abstract Long time relaxation at temperatures below the calorimetric glass transition causes reversible structural changes in metallic glasses. The resulting enthalpy recovery was measured by means of DSC in Zr 46.8 Ti 8.2 Cu 7.5 Ni 10 Be 27.5 - and Pd 40 Cu 30 Ni 10 P 20 -bulk glass annealed for different times at 553 K and 542 K, respectively. Relaxation times of about 10 6 s and 10 4 s, respectively, were determined. The diffusion coefficients of B, Fe and Co were measured above and below the calorimetric glass transition temperature. Whereas the temperature dependence of these diffusion coefficients in the non-relaxed glasses shows “non-linear” Arrhenius behaviour with a break near the glass transition, the diffusion in the long time relaxed glasses follows a uniform temperature dependence over the entire temperature range with considerably reduced diffusion coefficients below the glass transition. This behaviour can be reversed by annealing the relaxed glasses again at higher temperatures indicating the strong effect of the reversible structural relaxation on the diffusion coefficients." @default.
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- W203419216 date "2002-10-01" @default.
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- W203419216 title "Effet de la relaxation structurale réversible sur la diffusion dans les verres métalliques" @default.
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- W203419216 doi "https://doi.org/10.1016/s0151-9107(02)80045-9" @default.
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