Solid Solution Equilibria in the Ternary System Zirconium-Oxygen-Hydrogen¹

Low-Pressure Solubility and Diffusion of Hydrogen in Zirconium

“…This indicates that there is some interaction between the oxygen and H atoms within the Zr lattice in the concentration range of this work. At higher concentrations of both oxygen and H, Edwards and Levesque (11) found that the heat of solution did not change with oxygen concentration. …”

“…Considerable experimental data on the solid solution equilibria in the Zr-O-H system were reported by Edwards and Levesque (11). Their work was carried out in the range 600~176 at H pressures of 1-760 mm Hg.…”

Tritium Barrier Materials and Separation Systems for the NGNP

“…It must be noted that non-saturated metals have lower hydrogen vapor pressures at equilibrium than fully saturated hydrides, and this property can be expressed on a plot of absorption isotherms. Figure 14, which is reproduced from Edwards et al [70] shows absorption isotherms for ZrH x , where x is varied between just about 0.2 to 2.0. Figure 15 shows similar curves that were measured for yttrium by Yannopoulos et al [71].…”

“…A=600ºC; B=700; C=750; D=800; E=825; F=850; G=875; H=900ºC. Reproduced from Edwards et al [70]. Figure 15.…”

Laboratory Method for Adjusting Hydrogen Content of Zirconium

“…Equilibrium 'pressure s t u d i e s have been coriducted'on Z r -H a l l o y s by many i n v e s t i g a t o r s (~e f s 4, 6, .7, .8, 9, ad: 10)'; H a l l , f i r t i n , , and Reese determined hydrogen absorption a t p a r t i a l pressures of 1 t o 760 mm. Hg and from room temp e r a t u r e t o 1050°C.…”