Abstract
Chemical diffusion studies in the nickel-zirconium system are investigated in the temperature range of 1046 to 1213 K employing diffusion couples of pure nickel and pure zirconium. Electron microprobe and X-ray diffraction studies have been employed to investigate the formation of different compounds and to study their layer growth kinetics in the diffusion zone. It is observed that growth of each phase is controlled by the process of volume diffusion as the layer growth obeys the parabolic law. The activation energies for interdiffusion in NiZr and NiZr2, which are the dominant phases in the diffusion zone, are 119.0 ±13.4 and 103.0 ±25.0 kJ/ mole, respectively. The formation and stability of compounds over the temperature range have been discussed on the basis of existing thermodynamic and kinetic data.
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Bhanumurthy, K., Kale, G.B., Khera, S.K. et al. Solid-State diffusion reaction and formation of intermetallic compounds in the nickel-zirconium system. Metall Trans A 21, 2897–2903 (1990). https://doi.org/10.1007/BF02647210
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DOI: https://doi.org/10.1007/BF02647210