4.15 Is carbon lkely to be a substitutional or interstitial impurity in iron? Ex

Question

4.15 Is carbon lkely to be a substitutional or interstitial impurity in iron? Explain why 4.16 Is aluminum lkely to be a substitutional or interstitial impurity in copper? Explain why 4.1 1.08 ev/atom. 4.18 What would the temperature need to be to double the percentage of vacancies in iron from the percentage at 1200° ?? The activation energy for the formation of vacancies n iron is 1.08 evatorn. Following are some constants which you will need in doing your HW. Boltzmann's constant, ke 8.6210 ev/K, radius of carbon is 0.077 nm, radius of iron is 0.126 nm, radius of aluminum is 0.143 nm, radius of copper is 0.128 nm.

Explanation / Answer

4.15) Carbon is likely to be an interstitial alloy with iron as carbon atoms are much smaller than iron atom and cannot substitute iron atom in the crystal lattice.

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