Abstract

Graphite crystals grown from hypereutectic solutions of carbon in iron were examined microscopically with a view to establishing the mechanisms of growth. It is proposed that nucleation occurred on a second phase which had been retained in some crystals extracted from the molten solution. The perfection of the crystals, which is compared with that of naturally occurring and pyrolytic graphites, is a function of the extent of decomposition of this second phase and the impurity content of the melt.

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