Crystal growth of quasicrystal and partial phase diagram involving quasicrystal in the Ag–In–Yb system

Icosahedral clusters, icosaheral order and stability of quasicrystals—a view of metallurgy∗

“…However, the stable iQcs formed in Zn 60 figure 18 that the iQc and the 2/1 and 1/1 approximants formed in a narrow composition region in the binary phase diagram of the Cd-Yb system also exist in the pseudo-binary phase diagram of the In-Ag-Yb system [70]. The replacement of Cd by In and Ag is possible not only for iQc but also for the 2/1 and 1/1 approximants.…”

“…Figure 12 shows partial x-ray diffraction patterns for (a) Al 70 figure 13, where the dependence of peak widths (HWHM) on G ⊥ for as-quenched and annealed states is shown. The figure clearly shows that the peak widths remain at a nearly constant value of 0.0025 Å −1 independent of G ⊥ , in contrast to the linear increase in the peak width reported for as-quenched Al-Cu-Fe [54].…”

A Review of Transmission Electron Microscopy of Quasicrystals—How Are Atoms Arranged?

“…The first QC discovered is primitive icosahedral phase [1]. Later, this type of icosahedral phase was found in Ag-In-Yb [39], Cd-Mg-Rare Earth [40]. The face-centered icosahedral QCs were first discovered by Tsai et al [41] in Al-Cu-Fe and later in Al-Pd-Mn [42] and Al-Pd-Re [42], and Zn-Mg-Rare Earth [43] etc.…”

The Structure of the (100) Surface of Ag-In-Gd 1/1 Approximant

“…The study of their surfaces would open up a new area of investigation in the surface science of quasicrystals. However samples containing Cd cannot be prepared in ultra-high vacuum (UHV) because of high vapour pressure of Cd [11]. This problem has been solved by replacing Cd with equal amounts of Ag and In yielding new ternary quasicrystals and approximants such as the i -Ag-In-Yb and the AgIn-Yb 1/1 approximant [12].…”