Example: Non-Steady State Diffusion

The scariest part of dealing with these kinds of problems is dealing with the erf function. However, this is also a great time to start practicing how to interpolate! Interpolation can save your life. Use it.

[@lordkacchancabbage6305]

Lifesaver Dr. Thank you so much!

[@drkiddengineering]

Glad it helped! I have always been surprised at how many people like the Materials videos. Let me know if you have questions.

[@Mr-jj4pt]

I don’t understand how you got the activation energy from the table

[@drkiddengineering]

In the Callister textbook that this problem is from, there is a table of Diffusion coefficients and activation energies in Chapter 5. Placement changes based on edition, but you should see Table 5.2 somewhere around section 5.5. In that table it gives you a list of diffusing species (the species that is moving) and host species (the species that makes up your material). You just find the line that has the correct ones then go over to the column for activation energy that is the proper units for your problem.

[@aiman522]

thanks you dr.

[@drkiddengineering]

Happy to help!

[@liorsinger1]

Is it possible for you to post the book's title and author? Thanks a lot

[@drkiddengineering]

Never! I will never tell anyone about how wonderful "Material Science and Engineering: An Introduction" by William D. Callister is. I will also never share that while I use the most recent version, a simple Google search will likely pull up older versions on Archive.org that are practically identical.