Quasicrystalline phase in melt-spun Al–Mn–Be ribbons

Microstructural evolution in Al–Mn–Cu–(Be) alloys

“…This means, that the i-phase can dissolve considerable amounts of Be, which makes it more stable. This was suggested by Song et al [3], and experimentally confirmed by using AES for the i-phase in the Al-Mn-Be [16] and AlMn-Be-Si [13] alloys. …”

Reassessment of the effects of Ce on quasicrystal formation and microstructural evolution in rapidly solidified Al–Mn alloys

“…The results from Manaila et al are not included in this table since they did not report the exact quantification of the Al, Mn and Ce contents; instead, they reported a Ce/Mn ratio of 0.42 for this phase in the Al-6Mn-2Ce ribbons. Also included in Table 2 are the calculated e/a ratios for each phase composition considering +3 for the valence of Al, À3.66 for the valence of Mn [35,43] and from +2 to +4 for the valence of Ce [44].…”

“…Among these, some had negligible effects (e.g., Mg and Fe [28,29]), some hindered QC formation (e.g., Sr [30]) while others (e.g., Ce [29,31,32] and Be [33][34][35]) were reported to significantly enhance their formation thereby enabling the production of QCs in thicker samples [29,33].…”

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

“…This indicates that the atomic arrangement is ordered but aperiodic [82]. It should be noted that the quantitative interpretation of HR-TEM images of icosahedral phase depends strongly on specimen thickness, because dynamical diffraction effects can generate extra spots, leading to new diffraction patterns of reduced scale but similar symmetry [83].…”

“…The atoms in the cluster center show mirror symmetry but not 10-fold symmetry (Figure 6b,c). Besides this type of decagonal cluster, another two types of decagonal clusters with mirror symmetry, 5-fold rotation It should be noted that the quantitative interpretation of HR-TEM images of icosahedral phase depends strongly on specimen thickness, because dynamical diffraction effects can generate extra spots, leading to new diffraction patterns of reduced scale but similar symmetry [83].…”