The diffusion coefficients for iron in nickel are given at two temperatures: T(K) 1273 1473 D (m²/s) 9.4 × 10-16 2.4 × 10-¹4 (a) Determine the values of Do and the activation energy Qa (b) What is the magnitude of D at 1100°C (1373 K)?

The diffusion coefficients for iron in nickel are given at two temperatures: T(K) 1273 1473 D (m²/s) 9.4 × 10-16 2.4 × 10-¹4 (a) Determine the values of Do and the activation energy Qa (b) What is the magnitude of D at 1100°C (1373 K)?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Concept explainers

Atomic diffusion in solids

In material science, diffusion can take place in solid, liquid, and gases. In solids, atomic diffusion can take place with the help of thermally activated and randomly vibrating atoms. The atomic diffusion in solids is complex and very slow in comparison to atomic diffusion in liquids and gases because the interatomic distance between the atoms is smaller in solids as compared to liquids and gases.

Question

The diffusion coefficients for iron in nickel are given at two temperatures:
T(K)
1273
1473
D (m²/s)
9.4 × 10-16
2.4 × 10-¹4
(a) Determine the values of Do and the activation energy Qa
(b) What is the magnitude of D at 1100°C (1373 K)?

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