Investigation of the Vanadium-Gallium System Between 50 and 100 Atomic Percent Vanadium.

摘要

The vanadium-gallium (V-Ga) system within the compositional range from 50 to 100 atomic percent V was investigated. Samples prepared by melting were studied by X-ray diffraction and metallographic techniques after slow cooling from 11000 C. The superconducting V3Ga phase was found to exist over a very limited compositional range. At room temperature, V3Ga exists in equilibrium with either V6 Ga5 (for compositions containing less than 75 atomic percent V) or a Ga saturated V solid solution (for compositions containing more than 75 atomic percent V). Both V6Ga5 and the V solid solution 0 are nonsuperconducting at 4. 2 K. The microstructures of samples near 75 atomic percent V(V3Ga) were essentially identical whether compositions were slightly hypostoichiometric or slightly hyperstoichiometric.