What would be the cause of this migration reversal

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Liquid film migration occurred when solute atoms were added to a liquid phase sintered body. If the migration direction of some liquid films was reversed and the films went back to their original position during annealing, what would be the cause of this migration reversal? Knowing that the principal radii of curvature of a liquid film were r₁ and r₂ just before its migration reversal, estimate the driving force of the liquid film migration.

Reference no: EM131281484

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