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Nickel (Nii) is to be diffused into pure copper at 675C. If the surface concentration is maintained to be 0.2wt%Ni, what will be the concentration

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Nickel (Nii) is to be diffused into pure copper at 675C. If the surface concentration is maintained to be 0.2wt%Ni, what will be the concentration 2mm from the surface after 25 h? 'The diffusion coefficient for nickel in copper at 6755C is 1.91011 m2/s

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