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Figure 3
HAADF-STEM images of the Mg–In–Yb alloy isothermally aged at 200°C for 4 h. The electron beam is parallel to (a)–(c) [0001]α and (d)–(f) [[11{\overline 2}0]]α. (a) Low-magnification HAADF-STEM image along the [0001]α direction, showing that the bright-contrast platelets have three variants with a {[10{\overline 1}0]}α habit plane. (b) and (c) An enlarged image of two platelets connected at a 120° angle; the atomic scale HAADF-STEM images show that the structure in the observed two-dimensional image consists of many separate quasi-unit cells with ellipse-like shapes. (d) Low-magnification HAADF-STEM image along the [[11{\overline 2}0]]α direction. (e) and (f) An enlarged image of the platelets in Fig. 3[link](d); the atomic-scale HAADF-STEM images indicate that the solute atoms are selectively stacked along [0001]α.

IUCrJ
Volume 5| Part 6| November 2018| Pages 823-829
ISSN: 2052-2525