Essential Magnesium Alloys Binary Phase Diagrams and Their Thermochemical Data

Table 6

Optimized model parameters of the Mg-Zn system [22].

Phase	Parameters; Δ𝑔^0 and ^0𝐿 in J/mole, ^oΔ𝐻 in J/mole·atom and ^oΔ𝑆 in J/mole·atom·K
Liquid	Z^MgMgZn=6, Z^ZnZnMg = 4;
	Δ𝑔^0MgZn=−8326.2+3.19𝑇; Δ𝑔^10MgZn=−4602.4−3.26𝑇;
	Δ𝑔^01MgZn=−62.8−3.76𝑇 (J/mole)
Mg-hcp; (Mg in Zn-hcp, Zn in Mg-hcp)	^0𝐿^Mg-hcp=−3502.5+5.64𝑇; ^1𝐿^Mg-hcp=−6129.9+5.66𝑇;
Mg2Zn11	^oΔ𝐻^Mg2Zn11Mg,Zn=−6601.2; ^oΔ𝑆^Mg2Zn11Mg,Zn=−1.82
Mg2Zn3	^oΔH^Mg2Zn3Mg,Zn=−10989.9; ^oΔ𝑆^Mg2Zn3Mg,Zn=−1.3
Mg12Zn13	^oΔ𝐻^Mg12Zn13Mg,Zn=−10019.9; ^oΔ𝑆^Mg12Zn13Mg,Zn=−1.92
Mg51Zn20	^oΔ𝐻^Mg51Zn20Mg,Zn=−4718.3; ^oΔ𝑆^Mg51Zn20Mg,Zn=0.16
MgZn2; (Mg%, Zn); (Mg, Zn%)2	^0𝐺^MgZn2Mg:Mg= 43 508.7;^0𝐺^MgZn2Mg:Zn=−55979.2+380.9𝑇−74𝑇ln𝑇 + 0.00085𝑇^2 −3.333 × 10^−6 𝑇^3; ^oΔ𝐻^MgZn2=−33815;^o𝑆^MgZn2=115.005;𝑐𝑝=70−0.0017𝑇+2×10^−5𝑇^2; ^0𝐺^MgZn2Zn:Mg= 30 012.9; ^0𝐺^MgZn2Zn:Zn= 20 008.6; ^0𝐿^MgZn2Mg,Zn:Mg=^0𝐿^MgZn2Mg,Zn:Zn=^0𝐿^MgZn2Mg:Mg,Zn=^0𝐿^MgZn2Zn:Mg,Zn=1.0