Imagine we desire to better understand how diffusion contributes the gradual grain growth of Al at 700ºC. To do this we would want to calculate the rate of diffusion across Al grain boundaries. Utilizing the equations available in your notes, Compute the diffusion coefficient for Al. Presume that the activation energy is 134,725 J/mol as well as the diffusion pre-exponent (D0) = 1.0 x 10-5 m2/s.
Select one:
a. D=5.85 x 10-13 J/mol
b. D=170.8 m2/s
c. D=5.85 x 10-13 m2/s
d. D=-0.000167 m2/s
e. D=8.84x10-16 m2/s