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(a) Differentiate between Face- Centered Cubic (FCC) and Body-Centered Cubic (BCC) crystal structures. Why FCC metals are more ductile than BCC metals? 5 marks) (ii) show the relationship between the unit cell edge length, a, and the atomic radius, R, for a BCC crystal. Iron has a BCC crystal structure, an atomic radius of 0.124 nm, and atomic weight of 55.85 g/mol. Calculate its theoretical density Given: Avogardos Number is 6.02 x 105 atoms/mol (5 marks) Figure 1 Determine the Miller indices for the directions A, B, C and planes P, Q, R in the following unit cells (Figures la & 1b) (b) 9 marks (c) How does diffusion take place in solid metals? Discuss the two common mechanisms and support your explanation with relevant sketches. 5 marks) (ii Briefly explain the application of diffusion process in surface engineering. (2 marks)
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F: С.С. um an O B8 raoKing2. Re.cinocaf → dicesplease upvote

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