Abstract
AbstractMeasurements of the hydrogen solubility in liquid alloys of the binary systems Li—In, Li—Pb and Li—Sn are reported. A detailled description of the experimental procedure is given. Solubility data were recorded in the pressure range 150—20000 hPa at temperatures up to 1220 K. Alloy interactions with stainless steel containers and with oxygen impurities were investigated. The temperature and pressure dependence of the mole fraction xH of hydrogen atoms in the melt at low hydrogen concentration, where Sievert's law is valid, can be described by the following equation: ln(xH√105Pa/PH2) = ‐ A + B/T. The values of the constants are A = 8.17, B = 734 K (LiPb); A = 7.84, B = 1970 K (Li62Pb38); A = 7.42, B = 1200 K (LiIn); A = 7.67, B = 3300 K (Li62In38); A = 7.08, B = 600 K (Li57Sn43); A = 6.86, B = 830 K (Li62Sn38). Strong deviations from Sievert's law are observed for two alloys indicating alloy decomposition. The reduction of the excess entropy of dissolved hydrogen in the alloys compared to pure lithium is discussed in the frame of an electrostatic model.
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