Table 3 Equilibrium values calculated at 453 K and 101 kPa with the nominal composition given in Table 1. The Al matrix and the precipitateβ-Mg₂Si were considered as the only active phases

Molar fraction of Mg in the precipitate: \( {\boldsymbol{c}}_{\boldsymbol{\beta}, \boldsymbol{Mg}}^{\ast} \)

0.6667

Molar fraction of Si in the precipitate: \( {\boldsymbol{c}}_{\boldsymbol{\beta}, \boldsymbol{Si}}^{\ast} \)

0.3333

Molar fraction of Mg in the matrix:\( {\boldsymbol{c}}_{\boldsymbol{eq},\boldsymbol{Mg}}^{\boldsymbol{\infty}} \)

2.14E-6

Molar fraction of Si in the matrix: \( {\boldsymbol{c}}_{\boldsymbol{eq},\boldsymbol{Si}}^{\boldsymbol{\infty}} \)

1.07E-2

Coefficient of diffusion of Mg in the matrix (m²/s)

2.01E-19

Coefficient of diffusion of Si in the matrix (m²/s)

1.35E-19

Molar volume of the precipitate (m³/mol)

1.000E-5

Radius of precipitate at the start of the mixed-mode regime: a _c (nm)

0.4

Radius of precipitate at the start of the DICTRA simulation (nm)

0.4

Radius of the system in the DICTRA simulation (nm)

50

Surface energy: γ:

0