Abstract
This paper presents a compilation and an analysis of data relating to oxygen diffusion in alpha-zirconium. Internal friction and strain ageing measurements of the oxygen jump time extend the range of conventional data to the temperature range of technological importance. The data span the temperature range 290 to 1500°C and fourteen orders of magnitude in the diffusion coefficient. Two equations can be used to represent the volume diffusion of oxygen in α-zirconium over the whole temperature range. For temperatures in the range 290 to 650°C the volume diffusion coefficient is given by D = 0.0661 exp( −44000 RT ) , 290 < T ⩽ 650° C, and is attributed to the jumps of oxygen interstitials in the basal plane. For temperature in the range 650 to 1500°C the volume diffusion coefficient is given by D = 16.5 exp( −54700 RT ) , 650 < T < 1500° C, and it is suggested that jumps of oxygen interstitials in the c-direction are rate controlling.
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