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(Solved): Q1) Compare interstitial and vacancy atomic mechanisms for diffusion and explain two reasons why i ...
Q1) Compare interstitial and vacancy atomic mechanisms for diffusion and explain two reasons why interstitial diffusion is normally more rapid than vacancy diffusion. (10 pts) Q2) Calculate the values of the diffusion coefficients for the interdiffusion of carbon in both \( \alpha \)-iron (BCC) and \( \gamma \)-iron (FCC) at \( 900^{\circ} \mathrm{C} \) using the data in the given below. Which is larger? Explain why this is the case. \( (\mathrm{R}=8.31 \mathrm{~J} / \mathrm{mol}-\mathrm{K})(15 \mathrm{pts}) \) Table 6.2 A Tabulation of Diffusion Data
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ANSWER - 1 Interstitial sites are the spaces between atoms and are far smaller than vacancies, which are essentially the