Figure 4(a) shows the TEM bright field image of zinc particles. The intragranular network of fine precipitates dominates these particles, which can be seen more clearly in the enlarged local area as shown in Figure 4(b), as indicated by the arrow.It can be seen more clearly in the enlarged partial area shown in Figure 4(b), as indicated by the arrow. The network appears to be roughly formed by sub-grain boundaries.Fig. 4(b), as pointed out by arrows. The network seems roughly to be formed by subgrain boundaries. However, HRTEM image in Fig. 4(c) provides solid evidence that it is formed by fineβ-LiZn4 precipitates. In the figure, Zn matrix is projected along [1−213] zone axis, while a string-shaped β-LiZn4 precipitate is projected along [2–1–10] zone axis. The precipitate has a width less than 14 nm, and a length at least 40 nm.Figure 4 (d) that (0001) β is parallel to (10-10). Figure 4(d) shows their fast Fourier transform diffraction pattern. In order to guide the pattern index, the calculated diffraction patterns of the two phases shown with blue or red dots are superimposed on the fast Fourier transform pattern. The calculations are performed using the two-phase rigidity (ie, no possible constraints, which will be discussed later) lattice parameters (Figure 1(b)). In this case, |g(0002)β| is very close but not the same as | g(10-10)|, and there is only a difference of 0.24nm-1, which is too small to be on the right side of Figure 4(d) The overlapped fast Fourier transform diffraction patterns are distinguished. Combining Figure 4(c) and (d), the orientation relationship (OR) between the two phases can be described as [1–213]//[2–1–10]β, (10−10)//(0001)β.
