Abstract
The pressure–composition isotherm (PCI) curves of a Ti–H system were measured over the range 350–550°C in a high-vacuum Sievert's apparatus. At 350°C, the hypo- and hyper-eutectoid Ti–H alloys were found to be stable at hydrogen pressures of 0.9 and 2.2Pa, respectively. This study successfully provides full PCI isotherm curves over the range 350–441°C, previously absent from the literature. These PCI curves improve our understanding of the hypo- and hyper-eutectoid phase transitions in the Ti–H phase diagram in terms of the thermodynamic properties, kinetics, phase boundaries and plateau pressures.
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