Determination of the diffusion coefficients of iron and chromium in pb17li

Abstract

A method with controlled forced convection using a cylindrical rotating sample has been devised to determine the diffusion coefficients of iron and chromium dissolved in Pbl7Li liquid metal at 500°C. The following values have been obtained: D(Fe/Pb17Li) 500°C = 4±2 × 10 −14 m 2 s −1 fD(Cr/Pb17Li) 500°C = 8±2.5 × 10 −11 m 2 s −1. A value of chromium solubility in Pb17Li at 500°C has also been deduced, C s = 90.9 g m −3 (10 wppm), which is compatible with the existing data at lower temperatures.