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Self and Impurity Diffusion in Icosahedral Al-Pd-Mn Quasicrystals
Published online by Cambridge University Press: 10 February 2011
Abstract
Diffusivities of Cr in icosahedral quasicrystals of Al-Pd-Mn system have been measured by the radioactive tracer method in combination with a precision grinding technique. The temperature dependence of the diffusivities follows the Arrhenius equation in the investigated temperature range from 850 to 1107 K. The activation energy Q = 235.5 ± 7.8 kJmol-1 and pre-exponential factor D0 = 1.2 × 10-2 m2s-1 were evaluated. The diffusion behavior is discussed in terms of a vacancy diffusion mechanism.
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- Copyright © Materials Research Society 1998
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