Question: At 2 5 0 C the diffusion coefficient and activation energy for Ni in Cu is D = 2 3 0 m m 2 s

At 250C the diffusion coefficient and activation energy for Ni in Cu is D=230mm2s and Qd=242kJmol. What is the diffusion coefficient at 400C?
At 2 5 0 C the diffusion coefficient and

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