Фазовая диаграмма системы K-Ti

К оглавлению: Другие диаграммы (Others phase diargams)


K-Ti (Potassium-Titanium) C.W. Bale The K-Ti system is almost completely immiscible in both the solid and liquid states. There is no evidence of intermetallic compound formation in this system, nor in any of the other alkali metal-group IVa systems. The extent of solubility is very limited. Based on thermodynamic calculations, the univariant temperatures in the assessed phase diagram are virtually coincidental with the phase transitions of the pure components. [70Ste] reported the solubility of Ti in liquid K to be less than the detection limit of 0.0003 at.% Ti for the apparatus used. There are no other reported solubility measurements for this system. By comparison with the other alkali metal-group IVa systems, the solubility of K in (Ti) and in liquid Ti is estimated to be very limited. From vapor pressure calculations, at 2000 C, the composition of the gas phase at 1 atm is estimated to be approximately 0.038 at.% Ti in equilibrium with almost pure liquid Ti. 70Ste: S. Stecura, Corrosion by Liquid Metals, Plenum Press, New York, 601-611 (1970). Published in Bull. Alloy Phase Diagrams, 10(2), Apr 1989, and Phase Diagrams of Binary Titanium Alloys, 1987. Complete evaluation contains 1 figure, 1 table, and 3 references. 1