Question

Describe the difference between self diffusion and carbon diffusion in α iron at 500^oC

Answer 1

The difference between self- diffusion and carbon diffusion in α iron at 500oC

Self-diffusion in α iron at 500oC	carbon diffusion in α iron at 500oC
1. It is atomic migration in pure metals.	1) It is Inter diffusion. Atoms of one metal diffuses into another metal
2)Diffusion is slower than the carbon inter diffusion (3.0 x 10^-21 m2/s).	2)Diffusion is faster (2.4 x 10^-12 m2/s).
3) There is no compositional change, because it involves the motion of atoms that are all of the same type.	3)There is compositional change, because iron and C both are involves.