Lectures on Kinetic Processes in Materials by Han-Ill Yoo

Lectures on Kinetic Processes in Materials by Han-Ill Yoo

Author:Han-Ill Yoo
Language: eng
Format: epub, pdf
ISBN: 9783030259501
Publisher: Springer International Publishing


3.A gold-nickel diffusion couple of limiting compositions (in mole fractions) NNi = 0.0974 and NNi = 0.4978 is heated at 925 °C for 2.07 × 106 s. Layers 0.003 cm thick and parallel to the original interface are machined off and analyzed.(a)Using the data tabulated below, calculate the diffusion coefficient at 20, 30, and 40 at % nickel.

(b)Suppose that markers are inserted at the original interface and move along during the diffusion process at a composition of 30 atom fraction nickel. From this, determine the intrinsic coefficients of gold and nickel at 30 atom fraction nickel.



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