Figure 1

System-of-interest. (a) Electron diffraction pattern of the solid QC phase, which proves unambiguously the decagonal symmetry of the QC phase in the Al-Ni-Co system. The scale bar measures 2 nm⁻¹. (b) Partial section of the Al_100−2xNi_xCo_x pseudo-binary, equilibrium phase diagram as measured by Yokoyama et al.³⁵ and reprinted with permission from the Japan Institute of Metals and Materials. \(L\) and \(D\) indicate the liquid and decagonal QC phases, respectively. (c) Calculated, alloy composition within the FOV during the XRT experiment (red) superimposed on the same phase diagram (black). The region plotted in (c) corresponds to the blue boxed region in (b). The solid QC grows and then melts due to the “pile up” of Al in the liquid phase. The dotted line indicates extrapolated compositions.