Concept explainers
The flux of
Answer to Problem 33SEP
The flux of
Explanation of Solution
Write the formula for lattice constant
Here, the radius of the iron atom is
Write the formula for volume
Write the formula for Fick’s law of diffusion.
Here, flux or flow of atoms is
Conclusion:
Refer Table 3.2, “Selected metals that have the BCC crystal structure at room temperature (20°C) and their lattice constants and atomic radii”.
The atomic radius of iron is
Substitute
Substitute
The number of atoms per unit volume is expressed as follows.
The concentration of atoms at the surface
The concentration of atom at the distance of
Refer Table 5.2, “Diffusivities at 500°C and 1000°C for selected solute-solvent diffusion systems”.
The diffusivity of manganese in FCC iron at 500°C is
Here,
Substitute
Thus, the flux of
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Chapter 5 Solutions
Foundations of Materials Science and Engineering