Measurements of ion beam mixing and radiation-enhanced diffusion in metallic glasses were made in the temperature range 10-525 K. It was observed that the mixing of tracer impurities at low temperatures was greater in the metallic glasses than in the constituent elements for NiZr and CuEr systems, and that it was about the same for the NiTi system. It was also observed in the NiZr glass that the rate of ion mixing is somewhat larger for copper than for gold tracer impurities but does not depend on the exact composition of the alloy. At higher temperatures, the rate of ion mixing was found to be dependent on temperature and ion flux in amorphous NiZr (a-NiZr), indicating that radiation-enhanced diffusion occurs in metallic glasses. The apparent activation enthalpy for diffusion in a-NiZr during ion irradiation is about 0.5 eV, and depends on the square root of the flux.
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