A.R. Paul

TL;DR: Using residual activity technique, diffusion of carbon-14 in 304, 347, and 316 steels has been studied in the temperature range of 450-1200°C as mentioned in this paper, and the results indicate that the segregation of carbon is due to the preferential precipitation of Cr23C6 along the grain boundaries of stainless steels.

TL;DR: In this paper, the diffusion of carbon in zirconium, zircaloy-2 and Zr-2.5% Nb has been studied in the temperature range 873-1523K for zirconsium and zirca-nb alloy, using the residual activity technique, and the diffusivities in the α and β phases were represented by D C/α-Zr (873-1123K) = (2.00 ± 0.37) × 10 −7 exp [ −(151.59 ± 2

TL;DR: In this article, the grain boundary diffusion coefficients were evaluated for most of the experiments by Whipple's method and for a few specimens, Suzuoka's method was also applied.

TL;DR: In this paper, the grain boundary diffusion coefficients evaluated by Whipple and Suzuoka's models can be represented by: Dg Cr/Monel-400 = 1.8 × 10 −5 expl[ -(1.7kJ/mole)/RT]m 2.