Material science question
1. A metal A Is diffusing into another pure metal B to form an alloy. After 30 hours, the concentration of A is 3.2wt% at a distance of 1.5mm from the interface between metals A and B. The diffusion coefficient of A in B corresponding to the reaction conditions is 3.84 x 10-11m2/s. Determine the surface concentration Cs.
The error function table is given here
|
Z
|
Erf(z)
|
|
0.30
|
0.3286
|
|
0.35
|
0.3794
|
|
0.40
|
0.4284
|
|
0.45
|
0.4755
|
|
0.50
|
0.5205
|
|
0.55
|
0.5633
|