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Which outcome occurs when increasing bath temperature in electrodeposition given a temperature-dependent kinetic rate constant?

A)Increased grain size in the deposit
B)Reduced internal stress in the deposit
C)Decreased deposition rate uniformity
D)Enhanced micro-crystallite nucleation rate

💡 Explanation

When bath temperature increases with deposition possessing a kinetic rate constant dependency on temperature, the energy for surface diffusion increases, leading to larger grain growth because atoms are more likely to find stable, lower energy positions. Therefore grain size increases, rather than reduced stress, uniformity or enhanced nucleation, as those are differently influenced via kinetic and deposition parameters.

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