The vapor pressures of phosphorus (P) in Cu-P alloys with concentrations less than 4.4 mol% Ρ at temperatures between 1202 and 1476 Κ were investigated by double Knudsen cell mass spectrometry using Cu-0.47 mol% Ρ alloy as a reference substance.The Ρ2 pressures of the liquid and solid alloy could be measured. The series of P 2 pressures obtained in this study was consistent with that thermodynamically expected from the phase diagram.
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