Thermodynamic Study of Solid Co–Ga Alloys by E.M.F. Measurements Using the Solid Electrolyte

Thermodynamic modeling of the cobalt–gallium system

“…The calculated solidus of the b phase is much more gallium rich than the solidus curves given by Lu [6] and Esslinger [7], but less gallium rich than the data reported by Wunsh [8] and Geibel [19]. The calculated solubility of gallium in a-cobalt agrees well with the data reported by Katayama [20] and Feschotte [5]. The experimental homogeneity ranges for the b phase are reproduced at the Co-rich limit, but show some deviation at the Ga-rich boundary [5,20].…”

“…2 and 3 together with the available experimental results taken from the literature. A very good agreement is observed between calculated values and the experimental data reported by Katayama [20]. Fig.…”

“…At 1000 K the homogeneity range of the b phase is from about 27-64.5 at.% Ga [5]. These data agree reasonably with the reported activity measurements as function of composition at 1073 and 1200 K [20]. The homogeneity range of the gallium-rich region of the b phase is controlled by the vacancy concentration in the b phase.…”

“…Gallium activities as a function of composition at temperatures ranging from 1000 to 1350 K were measured by an E.M.F. method with solid electrolyte by Katayama [20,23] and Mikula [24]. The activity data shown in Fig.…”

Thermodynamic properties of liquid silver–gallium alloys determined from e.m.f. and calorimetric measurements

“…Our data, given by equation (5), are shown in figure 3 and are compared with the already published data [17][18][19][20][21]. The spread between the results of different studies is of the order of 20 kJ, which is about 3% of the measured value.…”