Tenfold twins in a rapidly quenched NiZr alloy

Jiang, Wen; Hei, Z. K.; Guo, Yukun; Kuo, K. H.

doi:10.1080/01418618508242136

Cited by 32 publications

(12 citation statements)

References 9 publications

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“…However, the analyses of the HRTEM contrast presented by the quasicrystalline phases and their respective diffraction patterns have shown that they are phases with non-crystallographic symmetry and not an aggregate of multiple twins, as in the case of MTPs. In fact, the co-existence in the same specimens of both quasicrystalline phases and twinned related phases (the ten-fold twinned structure in particular) has been reported in some alloys [12,13]. Therefore quasicrystals are not twinned structures and their structural differences with them are now well established.…”

Section: Discussionmentioning

confidence: 91%

Analysis of the contrast in icosahedral gold nanoparticles

et al. 2007

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When observing nanoparticles with the transmission electron microscope very often we observe a contrast that can be interpreted at first sight as coming from a some kind of a quasicrystalline array, i.e. with order but not periodicity. In the case of icosahedral particles their structure has been well studied by many years and their contrast explained in terms of twins. In this work we present the analysis of the quasi-periodic contrast observed in icosahedral gold nanoparticles along the five-fold direction, which resembles the contrasts of a quasicrystalline structures. A detailed analysis led us to demonstrate that it could correspond to a Moire´-pattern artifact produced in an array of Mackay icosahedra.

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Section: Discussionmentioning

confidence: 91%

Analysis of the contrast in icosahedral gold nanoparticles

et al. 2007

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“…The tetragonal Mn 3 Ga 5 (T) particles can be found in the surrounding areas. From Figure 1, it can be seen that the MnGa phase will solidify in a Mn 37 Ga 63 alloy at a temperature between 772 ЊC to 725 ЊC. During solidification, the liquid alloy may attain a composition above 63 at.…”

Section: Alloys and Phasesmentioning

confidence: 96%

“…It is well known that the approximants of a DQC frequently form tenfold twins, [37,38,39] and the Mn 5 Ga 7 (O) is no exception. Figure 7 shows five 36 deg sectors, marked 1 through 5, respectively, with a uniform contrast in each twin, except for some twin lamellae in them.…”

Section: B Tenfold Twinsmentioning

confidence: 99%

Decagonal quasicrystal and related crystalline phases in Mn-Ga alloys with 52 to 63 a/o Ga

Kuo

1997

Metall Mater Trans A

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A decagonal quasicrystal (DQC) and six related intermetallic phases with large unit cells have been found in binary Mn-Ga alloys with 52 to 63 at. pct Ga by means of transmission electron microscopy (TEM). As does the Al-Mn DQC, the Ga-Mn DQC also has a periodicity of 1.25 nm along its tenfold axis. However, its Mn content, determined by electron microprobe X-ray analysis (about 45 to 50 at. pct Mn), is much higher than that of the Al-Mn DQC (about 20 to 30 at. pct Mn). The compositions of the intermetallic phases are about 53, 56, 58, and 62 at. pct Ga, corresponding respectively to the unknown structures of MnGa (50.7 to 53.4 at.

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“…Tenfold twins have also been observed in rapidly solidified NiZr alloys (Jiang, Hei, Guo and Kuo 1985). The NiZr phase has a CrB type structure which may also be described as a stacking of columns of TP units.…”

Section: Discussionmentioning

confidence: 95%