Essential Magnesium Alloys Binary Phase Diagrams and Their Thermochemical Data

Table 19

Enthalpy of formation of the Mg-Y intermetallic compounds.

Compound	Enthalpy of formation (kJ/mole·atom)	Entropy of formation (J/mole·atom·K)	Reference
Mg24Y5 (𝜀)	−6.18	0	This work Cal. (Calphad)
	−7.5±0.84	0.4±0.3	[65] Exp.
	−6.1		[70] Exp.
	−5.84		[71] Cal. (F.P.)
	−5.4		[162] (F.P.)
Mg2Y (𝛿)	−9.77	−0.66	This work Cal. (Calphad)
	−14.2±1.26	−1.3±0.4	[65] Exp.
	−12.0		[70] Exp.
	−9.17		[71] (F.P.)
	−8.6		[162] (F.P.)
MgY (𝛾)	−10.7	−1.26	This work Cal. (Calphad)
	−12.6±1.26	−0.3±4.0	[65] Exp.
	−30.3		[70] Exp.
	−10.64		[71] (F.P.)
	−10.2		[162] (F.P.)