Diffusion in metallic glasses |
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Authors: | D Akhtar B Cantor RW Cahn |
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Affiliation: | (1) Defence Metallurgical Research Laboratory, Hyderabad, India;(2) University of Oxford, Oxford, England;(3) Churchill College, Cambridge, England |
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Abstract: | Rutherfordα-particles backscattering technique was employed for measurements of diffusion rates in metallic glasses. Effects of relaxation,
crystallization and plastic deformation on diffusion rates were also investigated.
It has been observed that the diffusion rates of a metallic solute are of the same orders of magnitude in both metal-metal
and metal-metalloid glasses. A higher diffusivity is likely if there is a large difference between melting points of the solute
and matrix. Relaxation has no effect on diffusion, however, diffusivity increases on crystallization. An increase in diffusivity
is also observed on plastic deformation of metallic glass. |
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Keywords: | Metallic glass diffusion relaxation crystallization plastic deformation activation energy |
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