Abstract
Single crystals of a new ternary intermetallic compound Nb 5Sn 2Ga were prepared from high-temperature tin solutions by a self flux method using Nb and Ga metals as starting materials under a He gas. The crystal was examined by X-ray diffraction and chemical analyses. The ternary single crystals Nb 5Sn 2Ga were generally obtained in the form of prismatic shape extending in the [001] direction, and with (100) and (110) faces. The Vickers microhardness value on (001) plane and (100) or (110) planes of crystals is in the range of 8.5–10.1 GPa. The electrical resistivity determined on crystal is in the range of 253.1–276.7 μΩ cm. The oxidation of Nb 5Sn 2Ga crystal starts at about 562°C. The final oxidation products were NbO 2, Nb 12O 29, Nb 2O 5, SnO 2 and Ga 2O 3.
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