Title

RECOVERY AND RECRYSTALLIZATION ON POLYCRYSTALLINE ICE

RECOVERY AND RECRYSTALLIZATION ON POLYCRYSTALLINE ICE

Authorship

PEDERNERA, A.; CARRERAS, A.; PARISI, F.; BORIS, N.; ARCIDIÁCONO, M.; ARENA, L.; NASELLO, O.

PEDERNERA, A.

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CARRERAS, A.

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PARISI, F.

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BORIS, N.

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ARCIDIÁCONO, M.

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ARENA, L.

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NASELLO, O.

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DOI

10.5151/2594-5327-C00237-3676-3684

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Abstract

The first stages of the evolution of the mean crystal size in polycrystalline ice samples are studied. Samples are obtained through a solid-solid phase transformation. Pure polycrystals (impurity concentrations less than 0.04 ppm) and doped polycrystals with 0.08 ppm NaCl are used. The temporal evolution of the mean crystal size is determined by means of the plastic replica method. The results show that the general recovery and primary recrystallization stages happen before 48 hours of -12°C isothermic annealing. Likewise, the doped samples reach the secondary recrystallization stage before the pure ones. This result is in agree with the observations made in grain growth, where low concentrations of soluble impurities are capable of increasing grain growth velocity in up to more than an order of magnitude.

The first stages of the evolution of the mean crystal size in polycrystalline ice samples are studied. Samples are obtained through a solid-solid phase transformation. Pure polycrystals (impurity concentrations less than 0.04 ppm) and doped polycrystals with 0.08 ppm NaCl are used. The temporal evolution of the mean crystal size is determined by means of the plastic replica method. The results show that the general recovery and primary recrystallization stages happen before 48 hours of -12°C isothermic annealing. Likewise, the doped samples reach the secondary recrystallization stage before the pure ones. This result is in agree with the observations made in grain growth, where low concentrations of soluble impurities are capable of increasing grain growth velocity in up to more than an order of magnitude.

Keywords

polycrystalline ice, recrystallization, grain growth, impurities, crystal size

polycrystalline ice, recrystallization, grain growth, impurities, crystal size