Abstract
Abstract The enthalpies of mixing in binary liquid alloys of iron with the lanthanides (Pr, Nd, Gd, Tb, Dy and Lu) were determined at 1550–1950 K by means of isoperibolic calorimetry. They show exothermic effects (in the Fe–Pr system partially endothermic) which increase across the lanthanides row from the Fe–Pr system (ΔH min = −0.35 ± 0.10 kJ · mol−1 at x Pr = 0.22; ΔH max = 0.75 ± 0.24 kJ · mol−1 at x Pr = 0.76; T = 1829 K) to the Fe–Lu system (ΔH min = −11.58 ± 0.50 kJ · mol−1 at x Lu = 0.35; T = 1950 K).
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