Фазовая диаграмма системы Hf-Na

К оглавлению: Другие диаграммы (Others phase diargams)


Hf-Na (Hafnium-Sodium) C.W. Bale No published data are available on the Hf-Na system. By analogy with Na-Zr and the other alkali metal-group IVa systems, the Hf-Na system is assumed to be almost completely immiscible in both the solid and liquid states. If the solubilities are very limited, the univariant temperatures are virtually coincidental with the transition temperatures of the pure components, as determined by thermodynamic calculations. From vapor pressure calculations, at 2000 C, the composition of the gas phase at 1 atm is estimated to be approximately 0.00005 at.% Hf in equilibrium with almost pure bHf. Published in Bull. Alloy Phase Diagrams, 8(1), Feb 1987. Complete evaluation contains 1 figure, 1 table, and 2 references. 1