Problem 2 a) Compute the value of D for the diffusion of zinc in copper at 650°C. b) At what temperature will the diffus

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Problem 2 A Compute The Value Of D For The Diffusion Of Zinc In Copper At 650 C B At What Temperature Will The Diffus 1 (38.39 KiB) Viewed 33 times

Problem 2 a) Compute the value of D for the diffusion of zinc in copper at 650°C. b) At what temperature will the diffusion coefficient for the diffusion of copper in nickel have a value of 6.5 x 10¹7 m²/s.. c) The diffusivity (D) of manganese atoms in the FCC iron lattice is 1.50 × 10-14 m²/s at 1300°C and 1.50× 10-15 m²/s at 400°C. Calculate the activation energy in kJ/mol for this case in this temperature range. R= 8.314 J/(mol-K). Diffusing Species Zn Cu Cu Mg Cu Nid Host Metal Cu (FCC) Zn (HCP) AI (FCC) AI (FCC) Ni (FCC) Cu (FCC) D.(m³/s) 2.4 x 10-5 2.1 x 10-4 6.5 x 10-5 1.2 x 10-4 2.7 x 10-5 1.9 × 10-4 QJ/mol) 189,000 124,000 136,000 130,000 256,000 230,000