Thermodynamic activity measurements in the B2 phases of the Fe–Al and Ni–Al systems
作者： D. Raj , L. Bencze , D. Kath , W.A. Oates , J. Herrmann
DOI: 10.1016/S0966-9795(03)00149-3
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摘要: Abstract The vaporisation of Fe–Al and Ni–Al alloys has been investigated in the temperature range 1140–1600 K 1178 to 1574 K, respectively, by Knudsen effusion mass spectrometry (KEMS). Eleven different also eleven compositions have composition ranges 30–51 at.% Al 38–53 Al, respectively. samples mostly B2 region phase diagram. partial pressures thermodynamic activities were evaluated directly from measured ion intensities formed equilibrium vapour over alloy pure element. From dependence integral molar enthalpies entropies mixing obtained. These are most accurate data obtained on systems so far. Nearly independent wide found, with being large negative.
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