Task 1 a) Briefly describe the difference between self-diffusion and interdiffusion. b) Compare space diffusion (interstitial diffusion) and vacancy diffusion (what characterizes each of these diffusion mechanisms). c) Name two reasons why space diffusion is normally faster than vacancy diffusion. d) What conditions must be met for the diffusion to take place at stationary conditions (steady-state)? e) What is the driving force of steady-state diffusion?