An Investigation of the Vanadium-Gallium System Between 50 and 100 Atomic Percent Vanadium
NATIONAL AERONAUTICS AND SPACE ADMINISTRATION CLEVELAND OH LEWIS RESEARCH CENTER
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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 VV3Ga were essentially identical whether compositions were slightly hypostoichiometric or slightly hyperstoichiometric.
- Organic Chemistry
- Properties of Metals and Alloys
- Atomic and Molecular Physics and Spectroscopy