Compute diffusion coefficients for the interdiffusion of carbonin both (a) α-iron (BCC) and (b) γ-iron (FCC) at 875˚C. Assume thatD0 for the interdiffusion of carbon in α-iron and in γ-iron are 1.1× 10-6 and 2.3 × 10-5 m2/s, respectively, and that Qd are 80 and148 kJ/mol, respectively. (a) m2/s (b) m2/s
Calculate the value of D at 636°C for the diffusion ofsome species in a metal for which the values ofD0 and Qd are 5.9 ×10-5 m2/s and 167 kJ/mol, respectively.
The activation energy for the diffusion of atomic species A inmetal B is 113 kJ/mol. Calculate the diffusion coefficient at859°C, given that the value of D at 1190°C is 7.3 ×10-11 m2/s.
