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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

From: Mixed-mode growth of a multicomponent precipitate in the quasi-steady state regime

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