The Thermodynamics of the Fe–Zn System

Fe-Zn

“…It has a maximum range of 69 to 83 at.% Zn at 945 K [74Bas,80Gel,81Tom]. The FeZn 10 and FeZn 13 phases decompose peritectically at 945 and 803 K respectively and the phase Fe 11 Zn 40 is formed peritectoidly at 823 K. The experimentally determined zinc activities by [81Tom] in the bccphase are reproduced well by the assessed data [00Reu]. The calculated phase diagram and thermodynamic properties are in good agreement with available experimental data.…”

“…Fe 3 Zn 7 is stable below its peritectic temperature. It has a maximum range of 69 to 83 at.% Zn at 945 K [74Bas,80Gel,81Tom]. The FeZn 10 and FeZn 13 phases decompose peritectically at 945 and 803 K respectively and the phase Fe 11 Zn 40 is formed peritectoidly at 823 K. The experimentally determined zinc activities by [81Tom] in the bccphase are reproduced well by the assessed data [00Reu].…”

“…The solubility of Zn in bcc-Fe reaches up to about 42 at.% Zn at the peritectic temperature [64Spe,79Ko,79Nis,81Tom,82Kub], while the solubility of Fe in hcp-Zn is very limited (∼0.001 at.% Fe). The maximum solubility of Zn in fcc-Fe is reported as 5.68 at.% Zn at ∼1423 K and a characteristic "gamma-loop" is formed [73Kir].…”

Vapor pressure measurement of zn-fe intermetallic compounds

“…From the activity data, the chemical potentials of zinc with pure liquid zinc as a reference state were calculated using the SGTE data for pure elements. [8] The chemical potentials of zinc at 723 K were also calculated by extrapolating from the temperature dependence of a Zn between 623 and 698 K. Figure 10 shows the chemical potential of zinc in the Fe-Zn binary system as a function of temperature together with the calculated results by Reumont et al, [9] who made the assessment based on the data reported by Tomita et al [5] and Gellings et al [4] Results by Tomita As seen in the reported phase diagram, [10] there is wide range of nonstoichiometry in ⌫ and ⌫ 1 . This is supported by the changes in lattice paramentors of these phases between ␣ ϩ ⌫ and ⌫ ϩ ⌫ 1 reported in Figure 1.…”

“…In either case, it is important to know the thermodynamic properties of the iron-zinc binary system for any detailed discussion on the formation of intermetallic compounds. Another practical aspect of the vapor pressure measurements is the zinc recovery from the galvanized steel sheets by the vacuum evaporation process proposed by Okada et al [1] Because of the experimental difficulties, however, there are only a few studies [2][3][4][5][6] available on the thermodynamic properties.…”