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Unformatted text preview: shown in the following figure PROBLEM 5: Pure iron goes through an allotropic transformation from bcc to fcc at approximately 910C. At the transformation temperature, the lattice parameter of bcc iron is 2.863 Å and the lattice parameter of fcc iron is 3.591 Å. Calculate the volume change associated with the transformation. Would you expect the material to expand or contract? Hint: Consider the fact that bcc iron has 2 atoms/unit cell, while fcc iron has 4 atoms/unit cell, and that the total number of atoms during the transformation does not change. PROBLEM 6: Determine the relationship between the atomic radius and the lattice parameter in the body centered cubic structure. PROBLEM 7: Determine the Miller indices for the directions A, B, C and D shown in the following cubic unit cell PROBLEM 8: For a cubic unit cell, sketch the following directions a) b) c)...
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- Spring '08
- Atom, Diamond cubic, Cubic Unit Cell, lattice parameter