Fig. 3 | Nature Communications

Fig. 3

From: Exceptional increase in the creep life of magnesium rare-earth alloys due to localized bond stiffening

Fig. 3

Formation and migration energies of vacancy at Mg sites. Heat of vacancy formation at Mg sites in: a γ″, D019, and β′ structures; b hcp-Mg lattice with no solutes, Nd and Zn solutes, and only Nd solute. Energies were calculated for vacancies at different nearest neighbor distances to Nd and/or Zn. Energy vs. reaction coordinates plots showing transition state calculations for out-of-plane (c) and in-plane (d) vacancy migration. The insets in c and d schematically show the migration paths in hcp-Mg. Addition of Zn retards Mg vacancy migration by increasing the peak-barrier and final saddle point energies (marked with arrow in c–d)

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