Diffusion The diffusivity of hydrogen in NI was measured in

Diffusion: The diffusivity of hydrogen in NI was measured in coarse and nano-grain sized microstructures (Figure 5.1). Calculate the activation energies for both microstructures. Explain any relative differences, if any. with reference to a plausible mechanism for H diffusion in Ni.

Solution

From the given dta Activation energy for first one is 2*10^-3

For second it is 3*10^-4