### Abstract

Experiments were performed to measure the Ostwald ripening kinetics of partially crystallized solid-liquid mixtures. A precision thermometric system was constructed which was capable of measuring curvature dependent solid-liquid interfacial temperatures. Direct, in situ measurements of the interfacial temperatures of partially crystallized solid-liquid mixtures were then made over a range of volume fractions solid, f{hook}_{v} (0.24 < f{hook}_{v} < 0.87). Results show that power law coarsening kinetics were present, with a coarsening rate exponent, n, in the range 0.33 < n < 0.4 over all volume fractions studied. Theoretical modeling of the temperature of a thermal probe immersed in a solid-liquid mixture was undertaken to quantify the experimental approach. Theory shows that the thermometers employed in these experiments sensed a temperature reflecting the local distribution of curvature and not that representative of the average curvature of the two-phase coarsening medium. Since the theory employed here is based upon a solution to the diffusion equation, specific predictions can be made concerning the relationship of the mean temperature of a coarsening solid-liquid mixture to the mixture's interfacial morphology, as well as on experimental requirements needed to permit proper measurement of the mean temperature during coarsening.

Original language | English (US) |
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Pages (from-to) | 599-615 |

Number of pages | 17 |

Journal | Journal of Crystal Growth |

Volume | 72 |

Issue number | 3 |

DOIs | |

State | Published - Sep 1985 |

### ASJC Scopus subject areas

- Condensed Matter Physics
- Inorganic Chemistry
- Materials Chemistry

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## Cite this

*Journal of Crystal Growth*,

*72*(3), 599-615. https://doi.org/10.1016/0022-0248(85)90211-8