Question: 6 . 1 3 . ( a ) If the initial concentration of Y 3 + in A l 2 O 3 is uniform at

6.13.(a) If the initial concentration of Y3+ in Al2O3 is uniform at C0, estimate its grain boundary concentration in terms of C0 at 1200C if the segregation energy is 0.2eV. Answer: 4.85C0.
(b) Repeat part (a) for a temperature of 1300C. Can you rationalize your result in terms of thermodynamics.
Answer: 4.84C0.
6.13.(a) If the initial concentration of Y3+ in Al2O3 is uniform

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