J. Japan Inst. Metals, Vol. 28, No. 11 (1964),
pp. 728-734

The Investigation on the Electrorefining of Titanium from the Molten Salts. ((II) Crystal Shapes and Growth of Titanium from the Various Molten Salt in the Electro-refining.)

Sakae Takeuchi¹ and Osamu Watanabe¹

Abstract:

The crystallographic aspect of hexagonal titanium crystals grown by electro-refining from molten salt was examined. The crystals reveal various shapes (plates,needles,dendrites) depending upon the conditions of electrolysis such as the bath composition, the purity of the salt, the cathode current density and the temperature of electrolysis. When the crystals were grown from high purity salt, the crystal were bounded by the basal plane and planes of {1012}, {1013}, {1014}, {1011}, while the crystals from impure salt were bounded by the basal plane and planes of {3031},{3032}, etc. At a relatively high temperature and low current density the crystals were grown in plates parallel to the basal plane. At low temperature or high current density the crystals were grown in needles parallel to < 1011 >, < 1122 > and < 1013 >. Growth twins were observed frequently. The twining planes were {1011}, {1012} and {1121}. The planes of this type have not been previously reported for deformation twins.

(Received 1964/6/1)

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